Waterlands

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Giant trevallyShoulder season

Bay · Hawaii

Mahaiʻula Bay

19.78°N · 156.04°W · Bay · Big Island Leeward Waters

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Best score today · 6 AM · Giant trevally

65/100Great
Now
647 AM HST
Best window
7-10 AMFlood tide
Tide now
Flooding1.5 ft ▲

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

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24-hour conditions · rolling from now

Conditions · 7 AM · now

Time7ANOW
Score64Good
Tide1.5 ft ▲Flooding
Current0.3 knmodeled · toward NE
Wind1 kn SSWgusts 7 · steady
Sea stateModerate2.8 ft · 12 s
Air temp78°Warm
WeatherPartly cloudy23% cloud
Water85°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

Mahaiʻula Bay

Depth
5-15 ftFlat bottom
Structure
Bay · Outer · Semi-exposedBay · flat bottom
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 Mahaiʻula Bay

Mahaiʻula Bay is a bay in Big Island Leeward Waters, Hawaii. Depth is 5-15 ft, with a flat bottom. Its profile reads bay, outer water and semi-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

  • Kahoiawa Point

    Cape · 1.9 mi

    67
    Top: Giant trevallyShoulder season
    • Giant trevally 67
    • Bonefish 30

    1 kt SSWH 8:35 AM · 1.6 ftL 1:05 AM · 0.3 ft

  • Kahoiawa Bay

    Bay · 2.0 mi

    67
    Top: Giant trevallyShoulder season
    • Giant trevally 67
    • Bonefish 30

    1 kt SSWH 8:35 AM · 1.6 ftL 1:05 AM · 0.3 ft

  • Puialoa Point

    Cape · 2.3 mi

    67
    Top: Giant trevallyShoulder season
    • Giant trevally 67
    • Bonefish 30

    1 kt SSWH 8:35 AM · 1.6 ftL 1:05 AM · 0.3 ft

  • Unualoha Point

    Cape · 2.7 mi

    67
    Top: Giant trevallyShoulder season
    • Giant trevally 67
    • Bonefish 30

    1 kt SSWH 8:35 AM · 1.6 ftL 1:05 AM · 0.3 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.