The Thailand resorts with the warmest sea water temperature at this moment are Ko Li Pe, Koh Lanta and Narathiwat.
Below you can see a list of all popular Thailand resorts and information about current sea water temperature and averages for current and next months.
| Resort Name | Current Sea Water Temperature |
September 2025 | October 2025 |
|---|---|---|---|
| Ko Li Pe | 91.0°F | 89.8°F | 89.2°F |
| Koh Lanta | 91.0°F | 88.8°F | 89.3°F |
| Narathiwat | 91.0°F | 89.9°F | 89.0°F |
| Phi Phi | 90.8°F | 88.6°F | 88.9°F |
| Pattani | 90.6°F | 89.5°F | 88.8°F |
| Krabi | 90.6°F | 88.6°F | 89.1°F |
| Bangkok | 90.2°F | 88.8°F | 88.7°F |
| Koh Lan | 90.0°F | 88.8°F | 88.7°F |
| Surat Thani | 90.0°F | 88.5°F | 88.4°F |
| Rawai Beach | 90.0°F | 87.8°F | 88.0°F |
| Nai Harn Beach | 90.0°F | 87.8°F | 88.0°F |
| Hat Yai | 90.0°F | 90.0°F | 89.6°F |
| Cape Panwa | 90.0°F | 88.1°F | 88.4°F |
| Kata Beach | 89.8°F | 87.7°F | 88.0°F |
| Pattaya | 89.8°F | 88.6°F | 88.6°F |
| Karon Beach | 89.8°F | 87.7°F | 88.0°F |
| Jomtien | 89.8°F | 88.6°F | 88.6°F |
| Phuket | 89.6°F | 87.8°F | 88.2°F |
| Bang Tao Beach | 89.6°F | 87.7°F | 88.1°F |
| Kalim Beach | 89.6°F | 87.7°F | 88.1°F |
| Kamala Beach | 89.6°F | 87.7°F | 88.1°F |
| Nai Yang Beach | 89.6°F | 87.8°F | 88.3°F |
| Patong Beach | 89.6°F | 87.7°F | 88.0°F |
| Surin Beach | 89.6°F | 87.7°F | 88.1°F |
| Mai Khao Beach | 89.4°F | 87.8°F | 88.3°F |
| Hua Hin | 89.4°F | 89.1°F | 89.3°F |
| Cha-am | 89.4°F | 89.1°F | 89.5°F |
| Bo Phut Beach | 89.2°F | 88.7°F | 88.7°F |
| Lamai Beach | 89.2°F | 89.0°F | 88.9°F |
| Mae Nam Beach | 89.2°F | 88.7°F | 88.7°F |
| Khao Lak | 89.2°F | 87.5°F | 87.9°F |
| Taling Ngam Beach | 89.2°F | 88.9°F | 88.9°F |
| Chaweng Beach | 89.2°F | 88.9°F | 88.8°F |
| Choeng Mon Beach | 89.2°F | 88.7°F | 88.7°F |
| Phangan | 89.2°F | 88.6°F | 88.6°F |
| Samui | 89.2°F | 88.8°F | 88.8°F |
| Ko Phangan | 89.2°F | 88.6°F | 88.6°F |
| Rayong | 89.2°F | 88.4°F | 88.8°F |
| Tao | 89.0°F | 88.5°F | 88.5°F |
| Samet | 89.0°F | 88.2°F | 89.0°F |
| Trat | 88.8°F | 88.0°F | 88.6°F |
| Ko Wai | 88.4°F | 88.1°F | 88.8°F |
| Ko Mak | 88.4°F | 88.1°F | 88.7°F |
| Koh Kood | 88.4°F | 88.0°F | 88.5°F |
| Similan | 88.2°F | 87.0°F | 87.7°F |
| Prachuap Khiri Khan | 88.2°F | 87.9°F | 88.7°F |
| Koh Chang | 88.2°F | 88.2°F | 88.8°F |
| Chumphon | 88.0°F | 87.7°F | 88.3°F |
Please see following sea water temperature averages charts for the warmest Thailand resorts for more details.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
Thailand Resorts:
NAME
F°
| Bang Tao Beach |  |
+84 |
| Bangkok |  |
+86 |
| Cape Panwa | |
+84 |
| Hua Hin | |
+84 |
| Karon Beach | |
+84 |
| Kata Beach | |
+84 |
| Khao Lak | |
+82 |
| Koh Chang |  |
+86 |
| Nai Yang Beach | |
+84 |
| Pattaya | |
+82 |
| Phangan | |
+86 |
| Phi Phi | |
+86 |
| Phuket | |
+84 |
| Samet | |
+86 |
| Samui | |
+86 |
