The Thailand resorts with the warmest sea water temperature in September are Ko Li Pe, Chaweng Beach and Choeng Mon Beach.
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 2020 | September 2019 | September 2018 |
|---|---|---|---|
| Ko Li Pe | 90.5°F | 89.8°F | 89.4°F |
| Chaweng Beach | 90.4°F | 88.4°F | 88.7°F |
| Choeng Mon Beach | 90.4°F | 88.3°F | 88.7°F |
| Hat Yai | 90.4°F | 89.5°F | 89.6°F |
| Samui | 90.4°F | 88.3°F | 88.7°F |
| Lamai Beach | 90.4°F | 88.4°F | 88.8°F |
| Mae Nam Beach | 90.3°F | 88.3°F | 88.6°F |
| Bo Phut Beach | 90.3°F | 88.3°F | 88.6°F |
| Ko Phangan | 90.3°F | 88.2°F | 88.5°F |
| Phangan | 90.2°F | 88.1°F | 88.5°F |
| Taling Ngam Beach | 90.1°F | 88.5°F | 88.7°F |
| Hua Hin | 89.8°F | 88.5°F | 88.4°F |
| Pattani | 89.7°F | 89.0°F | 89.2°F |
| Tao | 89.7°F | 88.0°F | 88.3°F |
| Cha-am | 89.7°F | 88.6°F | 88.6°F |
| Narathiwat | 89.6°F | 88.8°F | 89.3°F |
| Koh Lan | 89.5°F | 88.5°F | 88.6°F |
| Bangkok | 89.3°F | 88.8°F | 88.9°F |
| Nai Harn Beach | 89.3°F | 88.9°F | 88.7°F |
| Rawai Beach | 89.3°F | 88.9°F | 88.7°F |
| Cape Panwa | 89.3°F | 89.1°F | 88.8°F |
| Karon Beach | 89.2°F | 88.8°F | 88.7°F |
| Kata Beach | 89.2°F | 88.8°F | 88.7°F |
| Jomtien | 89.2°F | 88.4°F | 88.4°F |
| Phi Phi | 89.2°F | 89.6°F | 89.1°F |
| Pattaya | 89.2°F | 88.4°F | 88.5°F |
| Similan | 89.2°F | 87.4°F | 87.2°F |
| Patong Beach | 89.2°F | 88.7°F | 88.6°F |
| Kalim Beach | 89.1°F | 88.7°F | 88.6°F |
| Phuket | 89.0°F | 88.7°F | 88.5°F |
| Bang Tao Beach | 89.0°F | 88.6°F | 88.5°F |
| Surin Beach | 89.0°F | 88.6°F | 88.5°F |
| Kamala Beach | 89.0°F | 88.6°F | 88.5°F |
| Rayong | 88.9°F | 88.0°F | 88.6°F |
| Prachuap Khiri Khan | 88.8°F | 87.7°F | 87.8°F |
| Nai Yang Beach | 88.7°F | 88.5°F | 88.4°F |
| Chumphon | 88.7°F | 87.7°F | 87.7°F |
| Samet | 88.6°F | 87.9°F | 88.2°F |
| Mai Khao Beach | 88.6°F | 88.4°F | 88.3°F |
| Krabi | 88.6°F | 89.2°F | 88.9°F |
| Koh Kood | 88.6°F | 87.5°F | 87.7°F |
| Koh Chang | 88.5°F | 87.6°F | 87.9°F |
| Ko Mak | 88.4°F | 87.5°F | 87.9°F |
| Koh Lanta | 88.4°F | 89.4°F | 89.1°F |
| Ko Wai | 88.4°F | 87.5°F | 87.9°F |
| Khao Lak | 88.1°F | 87.7°F | 87.5°F |
| Surat Thani | 88.0°F | 88.2°F | 88.2°F |
| Trat | 87.8°F | 87.7°F | 87.9°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.
Sea Water
Temperature
Temperature
| Ko Li Pe |
Sea Water
Temperature
Temperature
| Chaweng Beach |
Sea Water
Temperature
Temperature
| Choeng Mon Beach |
Thailand Resorts:
NAME
F°
| Bangkok |  |
+92 |
| Chumphon |  |
+88 |
| Hua Hin |  |
+90 |
| Koh Chang |  |
+88 |
| Krabi | |
+86 |
| Narathiwat | |
+86 |
| Pattani | |
+88 |
| Pattaya | |
+88 |
| Phi Phi | |
+86 |
| Phuket | |
+86 |
| Prachuap Khiri Khan | |
+88 |
| Rayong |  |
+88 |
| Samet | |
+88 |
| Samui | |
+86 |
| Surat Thani | |
+86 |
