In September warmest sea in Thailand is usually observed in the following locations: Ko Li Pe, Koh Lanta, Phi Phi.
Table below shows the average sea water temperature for marine resorts of Thailand in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Ko Li Pe | 86.9°F | 85.8°F | 85.7°F |
| Koh Lanta | 86.3°F | 84.9°F | 84.7°F |
| Phi Phi | 86.3°F | 84.8°F | 85.0°F |
| Krabi | 86.2°F | 84.8°F | 85.1°F |
| Pattani | 86.2°F | 85.5°F | 85.6°F |
| Hat Yai | 86.1°F | 86.0°F | 85.8°F |
| Narathiwat | 86.1°F | 85.9°F | 85.7°F |
| Bangkok | 85.9°F | 84.9°F | 85.8°F |
| Koh Lan | 85.8°F | 84.9°F | 86.0°F |
| Cape Panwa | 85.7°F | 84.3°F | 84.8°F |
| Pattaya | 85.7°F | 84.8°F | 85.7°F |
| Cha-am | 85.7°F | 85.2°F | 86.0°F |
| Hua Hin | 85.6°F | 85.2°F | 86.0°F |
| Jomtien | 85.6°F | 84.7°F | 85.7°F |
| Phuket | 85.5°F | 84.0°F | 84.6°F |
| Kamala Beach | 85.5°F | 84.0°F | 84.6°F |
| Bang Tao Beach | 85.5°F | 84.0°F | 84.6°F |
| Surin Beach | 85.5°F | 84.0°F | 84.6°F |
| Rawai Beach | 85.5°F | 84.1°F | 84.5°F |
| Kalim Beach | 85.5°F | 84.0°F | 84.6°F |
| Nai Harn Beach | 85.5°F | 84.1°F | 84.5°F |
| Patong Beach | 85.5°F | 83.9°F | 84.6°F |
| Kata Beach | 85.4°F | 84.0°F | 84.6°F |
| Karon Beach | 85.4°F | 84.0°F | 84.6°F |
| Nai Yang Beach | 85.4°F | 84.0°F | 84.5°F |
| Lamai Beach | 85.4°F | 85.1°F | 85.8°F |
| Taling Ngam Beach | 85.4°F | 85.0°F | 85.5°F |
| Mai Khao Beach | 85.3°F | 84.0°F | 84.4°F |
| Chaweng Beach | 85.3°F | 85.0°F | 85.7°F |
| Samui | 85.2°F | 84.9°F | 85.6°F |
| Choeng Mon Beach | 85.2°F | 84.9°F | 85.6°F |
| Mae Nam Beach | 85.2°F | 84.9°F | 85.5°F |
| Bo Phut Beach | 85.2°F | 84.9°F | 85.5°F |
| Rayong | 85.1°F | 84.5°F | 85.5°F |
| Surat Thani | 85.1°F | 84.6°F | 84.7°F |
| Ko Phangan | 85.0°F | 84.7°F | 85.4°F |
| Phangan | 85.0°F | 84.7°F | 85.4°F |
| Samet | 84.9°F | 84.3°F | 85.3°F |
| Trat | 84.7°F | 84.2°F | 84.5°F |
| Khao Lak | 84.7°F | 83.7°F | 83.8°F |
| Tao | 84.6°F | 84.6°F | 85.4°F |
| Ko Wai | 84.6°F | 84.3°F | 85.0°F |
| Ko Mak | 84.5°F | 84.3°F | 85.1°F |
| Koh Kood | 84.5°F | 84.2°F | 85.1°F |
| Koh Chang | 84.4°F | 84.4°F | 85.0°F |
| Chumphon | 84.4°F | 83.9°F | 84.8°F |
| Prachuap Khiri Khan | 84.3°F | 84.1°F | 85.2°F |
| Similan | 84.1°F | 83.3°F | 84.0°F |
Charts below show average sea water temperature for Thailand resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Thailand resorts at that time.
Places in Thailand:
Name
°F
