Koh Samui Gulf of Thailand fishing forecast
Koh Samui Gulf of Thailand is a saltwater fishing spot in Surat Thani Thailand, Thailand. Anglers here target Indo-Pacific Sailfish, Yellowfin Tuna, Mahi-Mahi. The most productive months are typically March, April, May, June, July, August, September, October.
Current conditions
| Sea surface temp | 30.9 °C |
|---|---|
| Wind | 16 km/h from SW |
| Wave height | 0.3 m at 3 s |
| Current | 0.08 m/s toward N |
| Pressure | 1010 hPa |
| Cloud cover | 100% |
Last updated Jul 4, 2026 (UTC). Conditions refresh through the day.
What the score means at Koh Samui Gulf of Thailand
Koh Samui Gulf of Thailand currently scores 63 out of 100 (Good). Water temperature is 30.9 °C. 8 forecast signals are active in this score. As a rough guide, a score above ~65 reflects conditions experienced anglers would typically fish; below ~45, consider waiting for a better window or targeting different species. The score blends live weather and ocean signals and can change through the day.
Bite windows
Best months for Koh Samui Gulf of Thailand:
About this spot
Gulfs are partly enclosed and typically calmer and more protected than the open ocean, which can extend fishable conditions in wind.
What you can catch
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Istiophorus platypterus
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Thunnus albacares
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Coryphaena hippurus
Best months by species at Koh Samui Gulf of Thailand
| Indo-Pacific SailfishIstiophorus platypterus | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yellowfin TunaThunnus albacares | ||||||||||||
| Mahi-MahiCoryphaena hippurus |
Months reflect typical catchability by species at this latitude; 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
Live scores update through the day. Get the full forecast, bite windows, and your own saved spots in the FishRadar app.
Download on the App StoreNearby spots
Explore 5 more fishing spots within 276 km of Koh Samui Gulf of Thailand.
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Koh Samui Gulf of Thailand
Phuket Andaman Sea
Phuket Andaman Thailand
Similan Islands Thailand
Andaman Coast
Frequently asked questions
What fish can you catch at Koh Samui Gulf of Thailand?
Anglers at Koh Samui Gulf of Thailand target Indo-Pacific Sailfish, Yellowfin Tuna 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 March, April, May, June, July, August, September, October.
What is the fishing forecast for Koh Samui Gulf of Thailand right now?
Koh Samui Gulf of Thailand currently scores 63 out of 100, based on live ocean and weather conditions — see the full breakdown on this page.
Do you need a licence to fish Koh Samui Gulf of Thailand?
Fishing at Koh Samui Gulf of Thailand follows the local rules for Surat Thani Thailand, Thailand. Bag limits, size limits, seasons and licence requirements are summarised in the Local regulations section above, with a link to the official authority.
Fishing guides for this spot
- How to Catch Yellowfin Tuna: Chasing the Blue-Water BrawlerHow to Catch Mahi-Mahi / Dorado: Chasing the Electric-Green Ghosts of the BluewaterHow to Read Tides for Fishing
Scores and conditions are forecasts for guidance only and can change rapidly. Always check local rules and current conditions, follow all fishing regulations, and prioritise your safety on the water.