The Thailand resorts with the warmest sea water temperature in September are Koh Lan, Cha-am and Hua Hin.
Below you can see a list of all popular Thailand resorts and information about sea water temperature in September for the last two years.
| Resort Name | September 2024 | September 2023 | September 2022 |
|---|---|---|---|
| Koh Lan | 90.0°F | 89.7°F | 89.4°F |
| Cha-am | 90.0°F | 89.7°F | 89.6°F |
| Hua Hin | 90.0°F | 89.3°F | 89.7°F |
| Hat Yai | 89.8°F | 89.8°F | 89.6°F |
| Lamai Beach | 89.8°F | 89.0°F | 89.7°F |
| Bangkok | 89.7°F | 89.4°F | 89.3°F |
| Chaweng Beach | 89.7°F | 88.9°F | 89.6°F |
| Pattaya | 89.7°F | 89.4°F | 89.1°F |
| Narathiwat | 89.7°F | 89.6°F | 89.3°F |
| Jomtien | 89.7°F | 89.4°F | 89.1°F |
| Ko Li Pe | 89.6°F | 89.7°F | 88.9°F |
| Pattani | 89.6°F | 89.6°F | 89.2°F |
| Samui | 89.6°F | 88.9°F | 89.6°F |
| Choeng Mon Beach | 89.6°F | 88.8°F | 89.6°F |
| Mae Nam Beach | 89.5°F | 88.8°F | 89.6°F |
| Bo Phut Beach | 89.5°F | 88.8°F | 89.6°F |
| Taling Ngam Beach | 89.5°F | 89.0°F | 89.8°F |
| Rayong | 89.4°F | 88.6°F | 89.0°F |
| Ko Phangan | 89.4°F | 88.6°F | 89.5°F |
| Tao | 89.4°F | 88.4°F | 89.6°F |
| Phangan | 89.3°F | 88.7°F | 89.5°F |
| Samet | 89.2°F | 88.4°F | 88.8°F |
| Prachuap Khiri Khan | 89.2°F | 88.3°F | 88.9°F |
| Krabi | 89.0°F | 89.0°F | 89.2°F |
| Koh Kood | 89.0°F | 88.5°F | 87.7°F |
| Ko Mak | 89.0°F | 88.6°F | 87.7°F |
| Koh Chang | 88.9°F | 88.7°F | 88.0°F |
| Ko Wai | 88.9°F | 88.8°F | 87.8°F |
| Phi Phi | 88.9°F | 89.1°F | 89.1°F |
| Chumphon | 88.7°F | 88.2°F | 88.8°F |
| Cape Panwa | 88.6°F | 88.7°F | 89.1°F |
| Surat Thani | 88.5°F | 88.4°F | 88.8°F |
| Koh Lanta | 88.5°F | 89.0°F | 88.9°F |
| Phuket | 88.5°F | 88.6°F | 89.0°F |
| Kalim Beach | 88.4°F | 88.6°F | 89.0°F |
| Surin Beach | 88.4°F | 88.6°F | 89.0°F |
| Kamala Beach | 88.4°F | 88.6°F | 89.0°F |
| Bang Tao Beach | 88.4°F | 88.6°F | 89.0°F |
| Patong Beach | 88.4°F | 88.6°F | 89.0°F |
| Karon Beach | 88.4°F | 88.6°F | 89.0°F |
| Kata Beach | 88.4°F | 88.6°F | 89.0°F |
| Rawai Beach | 88.4°F | 88.6°F | 89.0°F |
| Nai Harn Beach | 88.4°F | 88.6°F | 89.0°F |
| Trat | 88.3°F | 88.6°F | 87.7°F |
| Nai Yang Beach | 88.3°F | 88.6°F | 88.9°F |
| Mai Khao Beach | 88.2°F | 88.5°F | 88.8°F |
| Similan | 87.8°F | 87.8°F | 88.3°F |
| Khao Lak | 87.6°F | 87.9°F | 88.4°F |
Please see following sea water temperature averages charts for the warmest Thailand resorts in September.
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 |  |
+88 |
| Bangkok |  |
+94 |
| Cape Panwa | |
+88 |
| Karon Beach | |
+88 |
| Kata Beach | |
+88 |
| Khao Lak | |
+86 |
| Koh Chang | |
+88 |
| Krabi | |
+88 |
| Patong Beach | |
+88 |
| Pattaya |  |
+88 |
| Phangan | |
+90 |
| Phi Phi | |
+88 |
| Phuket | |
+86 |
| Samet | |
+88 |
| Samui | |
+90 |
