In May warmest sea in Gulf of Thailand is usually observed in the following locations: Trat, Koh Chang, Ko Wai.
Table below shows the average sea water temperature for marine resorts of Gulf of Thailand in May for the last three years.
| Place name | May 2026 | May 2025 | May 2024 |
|---|---|---|---|
| Trat | 88.7°F | 87.9°F | 89.3°F |
| Koh Chang | 88.5°F | 87.7°F | 89.7°F |
| Ko Wai | 88.3°F | 87.8°F | 89.4°F |
| Rayong | 88.2°F | 87.9°F | 89.1°F |
| Samet | 88.2°F | 88.0°F | 89.0°F |
| Ko Mak | 88.1°F | 87.8°F | 89.2°F |
| Koh Kong | 88.1°F | 87.5°F | 88.8°F |
| Cha-am | 88.0°F | 87.6°F | 88.9°F |
| Koh Kood | 88.0°F | 87.7°F | 89.2°F |
| Koh Rong | 87.9°F | 87.9°F | 89.0°F |
| Hua Hin | 87.9°F | 87.7°F | 88.6°F |
| Bangkok | 87.9°F | 87.3°F | 88.5°F |
| Jomtien | 87.7°F | 87.3°F | 88.8°F |
| Pattaya | 87.7°F | 87.3°F | 88.8°F |
| Koh Lan | 87.6°F | 87.3°F | 88.8°F |
| Prachuap Khiri Khan | 87.0°F | 86.8°F | 88.3°F |
Charts below show average sea water temperature for Gulf of Thailand resorts with the warmest sea in May.
You can also check other months of the year to see sea temperature of Gulf of Thailand resorts at that time.
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