Koh Samui Gulf of Thailand fishing forecast
Koh Samui Gulf of Thailand is a saltwater fishing spot in Gulf of Thailand, Thailand. Anglers here target Wahoo, Giant Trevally, Mahi-Mahi. The most productive months are typically January, February, March, April, May, June, July, August, September, October, November, December.
Today’s verdict
Trending up — 3 points above this spot’s 7-day average
Score confidence ±4 points, from 8 live signals
The statistical model disagrees with the physics model here today — treat this score with extra caution.
Current conditions
Live conditions are temporarily unavailable for this spot (last data Aug 28, 2026). Seasonal and regulation info below is unaffected.
What the score means at Koh Samui Gulf of Thailand
Koh Samui Gulf of Thailand currently scores 67 out of 100 (Good). Water temperature is 30.0 °C. 8 forecast signals are active in this score.
- Water temperature +25.0
- how close the water is to this species mix’s comfort band
- Chlorophyll +18.0
- plankton density — the base of the food chain
- Waves +9.0
- swell energy stirring the water column
- Current +8.6
- moving water concentrates bait
- Wind +5.3
- surface chop, oxygen and bait drift
- Pre-storm bite +3.5
- the classic feed before heavy weather
What’s biting now
The model expects today: giant-trevally, yellowfin-tuna, mahi-mahi, albacore, pacific-albacore, great-barracuda, bonefish, almaco-jack
Bite windows
Best months for Koh Samui Gulf of Thailand:
Score history at this spot
7 days tracked at this exact location
Best recent day: 2026-08-23, 71/100
1 day(s) at 70+ in the tracked period
About this spot
Open coastal saltwater — conditions and safety depend heavily on the live wind, wave, and tide forecast, so check them before you head out.
Access & shore
Fishable from shore · offshore-only
What you can catch
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Acanthocybium solandri
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Caranx ignobilis
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Coryphaena hippurus
Best months by species at Koh Samui Gulf of Thailand
| WahooAcanthocybium solandri | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Giant TrevallyCaranx ignobilis | ||||||||||||
| Mahi-MahiCoryphaena hippurus |
Typical months; local seasons and closures apply.
Local regulations
Licensing:
- saltwater-recreational — residents Thailand does NOT require a recreational fishing licence or permit for rod-and-line angling in public waters (for Thai nationals or visitors). However, all fishing is PROHIBITED inside marine national parks, protected/reserved species may never be taken, and area/gear restrictions under the Royal Ordinance on Fisheries B.E. 2558 (2015) may apply. Private fishing parks set their own entry fees and rules., non-residents Visiting anglers do not need a recreational licence for rod fishing in public waters, but the same prohibitions apply: no fishing inside marine national parks (fines apply per person aboard the vessel), and no taking of protected species. Confirm local rules with the Department of Fisheries and, for national-park waters, the Department of National Parks (DNP).
FishRadar regulations are summaries for informational purposes only. Thailand does not require a recreational licence for rod-and-line fishing in public waters, but rules vary by location and can change. ALL fishing is PROHIBITED inside Thailand's marine national parks (administered by the Department of National Parks); fines are charged per person aboard the vessel. Protected and reserved species (whale shark, sawfishes, manta and devil rays, marine turtles, dugong and the wild Mekong giant catfish) may never be taken under the Wildlife Conservation and Protection Act B.E. 2562 (2019). Area and gear restrictions apply under the Royal Ordinance on Fisheries B.E. 2558 (2015). Always verify current rules with the Department of Fisheries (and the Department of National Parks for protected-area waters) before fishing — FishRadar is not a legal source.
Check Koh Samui Gulf of Thailand before you go
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Nearby spots
Explore 5 more fishing spots within 446 km of Koh Samui Gulf of Thailand.
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Phuket Andaman Sea
Phuket Andaman Thailand
Similan Islands Thailand
Andaman Coast
Mae Klong River Thailand
Frequently asked questions
What fish can you catch at Koh Samui Gulf of Thailand?
Anglers at Koh Samui Gulf of Thailand target Wahoo, Giant Trevally and Mahi-Mahi.
When is the best time to fish Koh Samui Gulf of Thailand?
The most productive months at Koh Samui Gulf of Thailand are typically January, February, March, April, May, June, July, August, September, October, November, December.
What is the fishing forecast for Koh Samui Gulf of Thailand right now?
Koh Samui Gulf of Thailand currently scores 67 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Can you fish Koh Samui Gulf of Thailand from shore?
Yes — Koh Samui Gulf of Thailand is fishable from shore (offshore-only).
Is the thermocline set up at Koh Samui Gulf of Thailand right now?
Not strongly right now — the water column is fairly mixed, so fish are less depth-locked.
Fishing guides for this spot
- How to Catch Wahoo: Chasing the Ocean's Fastest SprinterHow to Catch Mahi-Mahi / Dorado: Chasing the Electric-Green Ghosts of the BluewaterHow to Read Tides for Fishing
Forecasts, not guarantees — check local rules before you fish.