Waterlands

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Giant trevallyShoulder season

Bay · Hawaii

Mamalu Bay

21.58°N · 157.88°W · Bay · Oahu Windward Waters

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Best score today · 6 AM · Giant trevally

58/100Good
Now
4612 AM HST
Best window
4-10 AMFlood tide
Tide now
Flooding0.4 ft ▲

Data from: NOAA CO-OPS + NDBC + ECMWF + Open-Meteo Marine · Waterlands engine

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24-hour conditions · rolling from now

Conditions · 12 AM · now

Time12ANOW
Score46Good
Tide0.4 ft ▲Flooding
Current0.2 knmodeled · toward NW
Wind4 kn NEgusts 10 · steady
Sea stateRough6.4 ft · 7 s
Air temp72°Warm
WeatherOvercast98% chance of rain
Water84°FObserved

Current regulations

What you can keep here today

IN EFFECT NOW

No rule for Giant trevally is on file here yet, so its status is unknown, not closed. Confirm limits with DLNR DAR before you keep a fish.

Source: DLNR DAR · Sync unavailable, last verified Sep 13, 2026

Seasonality · 52-week view · this week ringed

When Giant trevally is best here

Shoulder season for Giant trevally · 32 more weeks at shoulder

Giant trevally season by week of the year. Shoulder season for Giant trevally · 32 more weeks at shoulder.
  • Peak
  • Shoulder
  • Off
  • This week

Giant trevally in Hawaii

Spot profile

Mamalu Bay

Depth
3-20 ftSlope
Structure
Bay · Outer · ExposedBay · slope
Season
Shoulder seasonGiant trevally

NOAA NCEI DEM, sampled Sep 14 on a 3.4 m grid. Depths are feet below NAVD 88, not chart datum (MLLW), so they can differ from a chart by a few feet. Not for navigation.

About this spot

Fishing Mamalu Bay

Mamalu Bay is a bay in Oahu Windward Waters, Hawaii. Depth is 3-20 ft, with a slope. Its profile reads bay, outer water and exposed.

Waterlands scores giant trevally and bonefish here. It is peak season now for bonefish, and shoulder season for giant trevally. Giant trevally peak from May through July. Bonefish peak from May through September.

Tackle & technique

Giant trevally
Ulua hunt reef edges, rocky points, harbor mouths and sand channels from the shoreline out to deep ledges. Shore anglers slide an eel, tako or crab down a heavy anchored line and fish through the night, while casters throw poppers and plugs over reef edges at dawn and dusk. The first run heads for the rocks, so use heavy line and a tight drag.
Bonefish
Bonefish push onto shallow sand and grass flats with the rising tide to root for shrimp, crabs and clams, often in water under 2 feet deep, and fall back to channel edges and deeper flats as the tide drops. Most fish are sight cast to with a small shrimp or crab fly, a light jig or a live shrimp, which takes bright sun, light wind and a quiet approach. They are catch and release only in Florida, and in Hawaii many anglers also fish bait from shore along sand channels and reef edges.

Nearby spots

Other spots within an easy run

  • Punaluʻu Channel

    Channel · 0.1 mi

    47
    Top: Giant trevallyShoulder season
    • Giant trevally 47
    • Bonefish 30

    4 kt NEH 10:15 AM · 1.9 ftL 12:36 AM · 0.4 ft

  • Kaluanui Channel

    Channel · 1.4 mi

    47
    Top: Giant trevallyShoulder season
    • Giant trevally 47
    • Bonefish 30

    4 kt NEH 10:15 AM · 1.9 ftL 12:36 AM · 0.4 ft

  • Makaliʻi Point

    Cape · 0.7 mi

    45
    Top: Giant trevallyShoulder season
    • Giant trevally 45
    • Bonefish 30

    4 kt NEH 10:14 AM · 2.1 ftL 1:04 AM · 0.6 ft

  • Shingle Channel

    Channel · 0.7 mi

    40
    Top: Giant trevallyShoulder season
    • Giant trevally 40
    • Bonefish 30

    14 kt EH 10:14 AM · 2.1 ftL 1:04 AM · 0.6 ft

Scores and forecasts are for planning only and can be wrong. Conditions on the water change fast; check the marine forecast before you go. Regulations change during the season, so confirm limits and closures with DLNR DAR before you keep a fish.