Best Moon Phase for Tuna Fishing

Q: What is the best moon phase for tuna fishing?

For daytime bluefin and yellowfin tuna, the new moon and the 7 days following it consistently produce the strongest catch rates. The new moon's dark skies keep bait shallower at night, leaving tuna less pre-fed and more aggressive at daybreak. For Bigeye tuna specifically, the full moon is the stronger phase — their thermoregulatory ability lets them pursue deep-diving bait in cold water that other tuna cannot reach.

Q: Why does moon phase affect tuna depth more than feeding activity?

Tuna are endothermic and feed actively across all phases of the moon. The moon primarily affects bait position in the water column. Baitfish rise shallow at night to feed on plankton, but on full moons, increased light suppresses this migration and bait stays deeper to avoid predators. Tuna follow their food supply. A 2024 review of 190 studies confirmed this depth-shift as the most consistent lunar effect in tuna.

Q: Should I fish deep or shallow during a full moon?

During the day on a full moon, fish deeper — run downriggers at 100–250 ft for yellowfin and 250–400 ft for Bigeye. After dark on a full moon, come back to the surface — ambient moonlight keeps tuna actively feeding in the lit surface layer all night.

Tuna Moon Phase Calendar 2026

Bluefin · Yellowfin · Bigeye · Albacore · Skipjack

New Moon — Best Daytime Bite

Full Moon — Bigeye & Night Trips

Bluefin Peak

Yellowfin Peak

Bigeye Window

Albacore Run

🖨️

How to Print / Save as PDF

Click "Print Calendar".
Select "Save as PDF".
Use Portrait and A4 settings.

Best Moon Phase for
Tuna Fishing

Tuna feed on every phase — but the moon controls where and how deep.

NewBest bluefin phase

100–400 ftFull moon depth shift

Jun–NovPrime offshore season

Tuna are different from almost every other game fish when it comes to lunar influence. They are endothermic — warm-blooded — which means they can dive into the cold deep without losing performance. This physiological trait fundamentally changes the relationship between tuna and the moon. Where salmon follow tidal push into river systems, and bass move shallower on full moons, tuna follow their bait supply vertically through the water column in response to lunar illumination. Understanding that distinction is the foundation of tuna moon strategy.

The core mechanism: baitfish — squid, sardines, anchovies, mackerel — perform daily vertical migrations, coming shallow at night to feed on plankton and retreating to depth during daylight. When the moon is bright (full moon and the days surrounding it), this nightly bait rise is suppressed. Bait stays deeper to avoid predation in the lit water column. Tuna follow. This is why the depth game changes with the moon far more dramatically than the bite activity itself. Unlike most freshwater species, tuna feed actively during all phases — the critical variable is where in the water column they are doing it.

The science

A 2024 review of 190 studies on large pelagic fishes — tuna, billfish, sharks, and rays — published by North Carolina Sea Grant found that the dominant and most consistent moon-phase effect across species was depth-related. In tuna specifically, more than half of studies showed fish moving meaningfully deeper as lunar illumination increased. A separate study on Bigeye Tuna in the Eastern Indian Ocean found statistically higher catch rates during full moon phases — attributed to Bigeye's unique ability to sustain deep, cold-water dives that other competitors cannot. For practical offshore fishing, the moon primarily controls the depth equation — not the on/off switch.

The four phases

New Moon

Best daytime surface bite

Dark skies mean bait migrates shallower than usual at night, then retreats normally at dawn. Tuna that fed aggressively in the shallows overnight are less likely to be pre-fed during the day. Many captains and San Diego landing data from multiple seasons consistently show the new moon as the strongest bluefin phase — peak catches fall in the 5–7 days following a new moon. Fish mid-column to surface.

First Quarter

Rising into peak — best overall window

The waxing moon (new to full) is consistently regarded as the strongest multi-day tuna window. Bait transitions from shallow to slightly deeper, concentrating at mid-water seams. Yellowfin counts peak around the first quarter in Pacific longshore data. Spring tides on new and full moons strengthen current lines that aggregate bait and tuna at FADs, canyon rims, and structure edges.

Full Moon

Deeper fish — better at night & Bigeye

Bright ambient light drives bait deeper, pulling tuna down with it. Daytime topwater activity typically drops. However, two exceptions make the full moon worth targeting: Bigeye tuna show a strong positive catch correlation with full moon periods globally, owing to their thermoregulatory advantage in deep cold water. Night trips are also excellent — full moon ambient light keeps tuna actively chasing bait in the lit water column after dark.

Third Quarter / Waning

Inconsistent — scout and adjust

The waning moon period (full to new) shows the weakest tuna catch rates in landing data from Southern California and Gulf of Mexico party boats. Bait aggregations are less predictable and fish tend to roam rather than concentrate. The period between full moon and third quarter is the single worst window for bluefin based on San Diego catch analysis — skunked-trip probability doubles compared to the new moon window.

Tuna daytime bite strength by moon phase

New moon (dark)

Best daytime — 85%

First quarter (waxing)

Strong — 72%

Full moon (night bite)

Night trips — 62%

Third quarter (waning)

Weakest — 38%

◯

The depth equation — why moon phase matters more than you think

For tuna anglers, the moon's most actionable effect is not about whether fish feed, but where in the water column they are doing it and when during the day they are doing it most aggressively. A tuna that fed shallow all night on a full moon is a different fish to approach than one that barely fed in the dark of a new moon. Adjusting your running depth and fishing window to the phase of the moon is the single most impactful tactical change most offshore anglers can make.

Water column position by moon phase

New Moon

🐟

Surface – 60 ftTuna and bait in upper column, day bite most active

🦑

60–150 ftSecondary mid-water zone, trolling downriggers

🌊

150 ft+Less productive during daylight

Full Moon

🌙

Surface – 60 ftNight bite active; day bite suppressed

🐟

100–250 ftYellowfin mid-column daytime holding zone

🎣

250–500 ftPrime Bigeye zone — deep jigs and drop-backs

Quarter Moon

🐟

60–150 ftMid-column default — fish roaming rather than aggregated

🔍

VariableLess predictable — use sonar to find bait schools and fish from there

Angler's tip

On a full moon, set your downrigger balls to 100–200 ft during the day and come up to 40–80 ft after dark. On a new moon, run your spread shallower all day and push hard in the first two hours of first light — fish that were inactive all night under dark skies are at their most aggressive right at dawn. Adjusting depth to the phase costs nothing and consistently puts you in front of more fish.

◯

Season strategy by species

Species / Season	Best phase	Target water	Strategy
Bluefin Tuna (May–Nov, Atlantic & Pacific)	New moon + 7 days	Canyon rims, temperature breaks, 50–150 ft	San Diego landing data shows bluefin catches peak in the 7 days after a new moon, with skunk probability doubling in the waning phase. Atlantic bluefin peak Jun–Oct. Fish canyon rims at daybreak with live bait or high-speed jigs at mid-column depths.
Yellowfin Tuna (Year-round, peak Jun–Oct)	First quarter (waxing)	FADs, floating debris, temperature breaks	Yellowfin counts peak around first quarter in Pacific coast data. Gulf of Mexico yellowfin respond strongly to spring tide current lines. Target floaters and FADs on incoming tidal flow around new and full moon for the strongest current aggregation effect.
Bigeye Tuna (Jun–Nov, deep water)	Full moon	Deep canyon walls, 250–500 ft	Bigeye are the exception — Indian Ocean longline data shows significantly higher Bigeye catch rates during full moon periods. Their endothermic physiology lets them follow deep-diving bait that other tuna cannot. Night drop-backs and deep jigging at full moon produce the best Bigeye results worldwide.
Albacore (Jul–Oct, Pacific)	New moon	Offshore temperature breaks, 55–65°F water	Pacific albacore respond to the same bait-depth mechanism as other tuna. New moon concentrates fish at mid-column depth during daylight. Troll feather jigs and cedar plugs at 6–8 knots along the warm-cool water edge. Dawn bite is strongest on dark-moon days.
Skipjack / Schoolie YFT (year-round tropics)	New & first quarter	Surface schools, bird piles, current seams	Smaller surface-schooling tuna are most visible and aggressive on the new moon when bait aggregates shallower. Look for bird activity — frigate birds over surface-breaking fish. New moon plus spring tide current seams concentrate bait and holding fish near structure and FADs.

◯

Tactics by situation

Select your fishing situation below for targeted depth, timing, and presentation tactics.

0–80 ft

Troll depth

New moon keeps bait shallower through the night — tuna that follow them stay in the upper column at first light. Run your spread at 30–80 ft for dawn and early morning sessions.

First 2 hours

Prime window

Fish that sat in darkness all night are least fed and most aggressive at dawn. First light on a new moon day is consistently the single most productive window for tuna topwater and mid-column action.

High-speed troll

Technique

Aggressive reaction strikes at new moon. Push troll speed to 7–9 knots for skipjack and schoolie YFT, back to 5–7 knots for bigger bluefin. Fish are actively hunting — speed triggers commitment.

Presentation: fast and visible in the upper column

New moon fish are shallower, hungrier, and more reactive than full moon fish. Skirted lures with a bold action profile outperform subtle presentations. Cover water quickly rather than working a single spot — fish are spread and active.

Cedar plugSkirted ballyhooSpreader barHigh-speed feather jigPopper — dawn bite

100–400 ft

Daytime depth

Full moon pushes bait to depth during daylight hours. Run downriggers or weighted spreads at 100–250 ft for yellowfin, 250–400 ft for Bigeye. Sonar is essential — mark bait layers and position your lures 15–30 ft above them.

Night — surface

After dark

Full moon ambient light keeps tuna feeding at the surface after dark. Night trips during full moon windows are highly productive — chum with cut mackerel or sardines, fish under the boat lights, and use surface poppers or pitch jigs to actively feeding fish.

Bigeye specialist

Deep tuna

The full moon is Bigeye's phase. Indian Ocean longline data shows significantly higher Bigeye CPUE during full moon. Deploy deep drop-backs with squid strip baits at 300–500 ft. Bigeye are the primary target when the full moon coincides with canyon or drop-off structure.

Presentation: deep, slow, natural

Full moon fish have better visibility and have often fed heavily overnight. Subtler, deeper presentations outperform surface reaction-speed tactics during daylight. Match the depth of the bait schools and slow down your retrieve speed. After dark, switch back to surface — moon-lit nights are the best tuna nights of the month.

Deep-diver plugsSquid drop-backKite fishing (night)Slow-pitch jig — deepFlasher + squid rig

Spring tide seams

Best timing

New and full moon spring tides generate the strongest current flow past FADs, buoys, and floating debris. Increased current concentrates baitfish on the up-current face of the structure — tuna stack on the down-current edge waiting to ambush.

Down-current face

Position

Approach FADs from up-current and drift lures past the structure on the down-current side. Tuna hold in the slack water behind the object waiting for bait washed by. Drift live bait or pitch jigs across this seam for the most efficient FAD presentation.

Depth varies

Adjust by phase

Apply the depth rule: surface-to-80 ft on new moon days, 80–200 ft on full moon days. FADs concentrate fish at all depths — use a vertical jig to probe the water column and find the active layer before committing your bait presentation.

FAD strategy: current first, depth second

The single most valuable variable at a FAD is current strength — and spring tides on new and full moons produce the strongest flow. A slow-current neap-tide FAD produces a fraction of the bait concentration and fish activity of a spring-tide FAD. Prioritize FAD trips that align with new or full moon windows.

Live mackerel — pitchVertical jig — 150–200 gPopper — dawn/duskChunking — cut mackerel

150–400 g

Jig weight

Match jig weight to depth and current. 150–200 g for 100–200 ft in moderate current, 300–400 g for 300–400 ft or strong spring tide current. Speed jigs and slow-pitch jigs both produce — use speed jigs at new moon when fish are aggressive, slow-pitch at full moon when fish are sluggish in the column.

Find the bait first

Use sonar

Mark bait schools on sonar and set up directly above them. Tuna hold 15–30 ft below the bait layer. Drop your jig through the bait school and work it up through the strike zone — the hit usually comes on the upward lift just after the jig clears the bait cloud.

Canyon structure

Best locations

Canyon walls and rims concentrate bait through upwelling and current deflection. Deep jigging along canyon structure on spring tides is the most consistent method for targeting Bigeye and large yellowfin — especially during full moon when fish run deep.

Jigging approach: match jig action to moon phase

New moon = fast, erratic jigging action — fish are aggressive and will chase. Full moon = slow-pitch with long pauses at depth — fish have fed and need a natural, dying-bait presentation to trigger. Always start your jig at maximum depth and work up, not the reverse.

Speed jig — chrome/blueSlow-pitch jig — sardineKnife jig — 250 gAssist hook rigButterfly jig

◯

Tonight's conditions

Cloud cover and visibility directly affect the lunar influence on tuna depth and surface activity. Check your local sky before planning your spread depth and night-fishing strategy.

Detecting your location…

◯

Tuna Moon Calendar

Full and new moon dates for the current season. New moon windows — particularly the 7 days following — are the strongest periods for daytime bluefin and yellowfin action. Full moon windows are prime for Bigeye and overnight trips. Both phases coincide with spring tides, which drive the current lines and bait aggregations that concentrate offshore tuna.

Full moon — Bigeye & night bite window

New moon — best daytime surface action

Peak tuna season active

◯

The honest picture — what the moon can and cannot do

Tuna are unique among offshore game fish in that strong scientific consensus confirms they feed actively across all lunar phases. A scientist with the Inter-American Tropical Tuna Commission has stated plainly that tuna do not require additional moonlight to capture prey and will feed day or night on any phase. That is true — and it is why experienced captains say the moon is well below sea temperature, bait in the area, current lines, and weather in the hierarchy of variables that determine whether a tuna trip succeeds.

What the moon does control, with measurable consistency, is where tuna are in the water column — and that is entirely actionable. An angler running their spread at 60 ft on a full moon day, when fish and bait have shifted to 200 ft, is simply fishing the wrong depth regardless of how good the other variables are. Matching your depth approach to the lunar phase costs nothing and adds a consistent edge that compounds across a season of offshore trips.

"I don't care what phase the moon is in — but I absolutely adjust my downrigger depth based on it. New moon, I'm fishing 40–80 feet. Full moon, I'm running everything at 150 and deeper. Fish the phase, not the myth."

— Charter captain, Outer Banks, NC

Key reminder

Sea surface temperature and the position of warm-water eddies will consistently outrank moon phase as a predictor of tuna location. Find the warm-water edge (typically 64–72°F depending on species), then layer moon phase strategy on top of it. A perfect new moon in cold, baitless water produces nothing. A full moon on a productive temperature break with bait present will always outfish a new moon with no bait. Moon phase refines your approach — it does not replace finding the fish first.

◯

Quick reference cheat sheet

Situation	What to do
New moon, day trip	Best daytime window for bluefin and yellowfin. Fish are least pre-fed and most aggressive. Run spread at 30–80 ft. Push troll speed and work the top of the water column at dawn. First 2 hours of light are the prime window.
Full moon, day trip	Fish have fed heavily overnight — daytime topwater bite is slow. Run downriggers at 100–250 ft. Fish canyon rims and deep structure. Use sonar to find bait layers and set up 20 ft above them. Bigeye are your target at 250–500 ft.
Full moon, night trip	Best moon phase for night fishing. Ambient light keeps bait and tuna active in the lit water column. Fish under boat lights with chum. Poppers and kite fishing produce outstanding results on full moon nights at the surface.
FADs / structure on spring tide	New or full moon spring tides generate the strongest current past FADs and floating structure. Position on the down-current face. Live bait, vertical jigs, and poppers all work — adjust depth by phase (shallow new moon, deep full moon).
Deep jigging for Bigeye	Bigeye are most catchable at full moon when they follow deep-diving bait into cold canyon water. Run slow-pitch jigs at 250–400 ft along canyon walls. Use assist hooks on a natural-profile knife or butterfly jig. Full moon + canyon structure = Bigeye's ideal window.
Waning moon / third quarter	Weakest daytime window — especially for bluefin. Landing data shows skunk rates double in the waning phase. If you must fish this window, focus on night trips, deep Bigeye approaches, or use the time to run temperature charts and scout the best locations for the coming new moon.
Eclipse windows (Mar 3, Aug 12 in 2026)	Both dates fall on new or full moons, already the strongest tidal and lighting windows of the month. Aug 12 total solar eclipse coincides with a new moon in peak offshore tuna season — an exceptional window if weather and sea temperature cooperate.

◯

Frequently asked questions

🌕 What is the best moon phase for tuna fishing?

For daytime bluefin and yellowfin tuna, the new moon and the 7 days following it consistently produce the strongest catch rates based on multi-season landing data from Southern California and Gulf of Mexico party boats. The new moon's dark skies keep bait shallower at night, leaving tuna less pre-fed and more aggressive at daybreak. For Bigeye tuna specifically, the full moon is the stronger phase — their thermoregulatory ability lets them pursue deep-diving bait in cold water that other tuna cannot reach. For overnight trips targeting any tuna species, the full moon is also excellent.

🌑 Why does moon phase affect tuna depth more than feeding activity?

Tuna are endothermic — warm-blooded — and feed actively across all phases of the moon. The mechanism by which the moon affects them is primarily through bait position in the water column. Baitfish (sardines, squid, mackerel) perform daily vertical migrations, rising shallow at night to feed on plankton. On full moons, increased light suppresses this migration and bait stays deeper to avoid predators. Tuna follow their food supply. A 2024 review of 190 studies confirmed this depth-shift as the most consistent lunar effect in tuna, found more strongly than in any other pelagic species surveyed.

🎣 Should I fish deep or shallow during a full moon?

During the day on a full moon, fish deeper — run downriggers at 100–250 ft for yellowfin and 250–400 ft for Bigeye. Bait has retreated to depth to avoid the lit water column and tuna follow it. After dark on a full moon, come back to the surface — ambient moonlight keeps tuna actively feeding in the lit surface layer all night. The full moon is the strongest night-fishing phase of the month, and many captains consider night trips during full moon windows the single best tuna fishing of the season.

🐟 Do tuna bite better before or after the full moon?

For daytime bluefin specifically, fishing the days leading up to the full moon — the waxing phase from new to full — produces the best results. Fish appear to become more active as the moon brightens, with the first quarter window being particularly strong for yellowfin. The period after the full moon (waning phase, full to new) is consistently the weakest daytime window. San Diego canyon landing data from multiple seasons shows bluefin skunk probability doubles between the full moon and third quarter compared to the new moon to first quarter window.

📅 What are the best months to combine moon phase with tuna fishing?

The strongest tuna-moon combinations are: June–July new moons for Pacific bluefin (Southern California canyons); August–October new moons for Atlantic bluefin and yellowfin (Atlantic coast canyons and Gulf Stream); full moon windows year-round for Bigeye in deep canyon and FAD fisheries. In 2026, the total solar eclipse on August 12 falls on a new moon during peak Atlantic tuna season — an extraordinary window combining maximum spring tide current, dark skies, and peak season timing. The May 2026 blue moon (two full moons in one month) gives an additional Bigeye and night-fishing opportunity during the season opening.

Best Moon Phase for Tuna Fishing

Tuna Moon Phase Calendar 2026

Bluefin · Yellowfin · Bigeye · Albacore · Skipjack

How to Print / Save as PDF

Best Moon Phase for
Tuna Fishing

The four phases

The depth equation — why moon phase matters more than you think

Season strategy by species

Tactics by situation

Tonight's conditions

Tuna Moon Calendar

The honest picture — what the moon can and cannot do

Quick reference cheat sheet

Frequently asked questions

Further Reading

🎣 Fishing Calendar

🌌 Sky Clarity

🦌 Hunting Calendar

Tuna Moon Phase Calendar 2026

Bluefin · Yellowfin · Bigeye · Albacore · Skipjack

How to Print / Save as PDF

Best Moon Phase forTuna Fishing

The four phases

The depth equation — why moon phase matters more than you think

Season strategy by species

Tactics by situation

Tonight's conditions

Tuna Moon Calendar

The honest picture — what the moon can and cannot do

Quick reference cheat sheet

Frequently asked questions

Further Reading

🎣 Fishing Calendar

🌌 Sky Clarity

🦌 Hunting Calendar

Best Moon Phase for
Tuna Fishing