The Thailand resorts with the warmest sea water temperature in September are Cha-am, Hua Hin and Hat Yai.
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 2017 | September 2016 | September 2015 |
|---|---|---|---|
| Cha-am | 91.1°F | 88.9°F | 89.1°F |
| Hua Hin | 90.9°F | 88.7°F | 88.9°F |
| Hat Yai | 90.8°F | 89.5°F | 90.3°F |
| Bangkok | 90.8°F | 89.0°F | 89.1°F |
| Pattaya | 90.4°F | 88.6°F | 88.8°F |
| Koh Lan | 90.4°F | 88.7°F | 88.8°F |
| Jomtien | 90.3°F | 88.6°F | 88.7°F |
| Ko Li Pe | 90.1°F | 88.2°F | 89.3°F |
| Rayong | 90.0°F | 88.3°F | 88.3°F |
| Lamai Beach | 90.0°F | 88.4°F | 89.3°F |
| Pattani | 90.0°F | 88.7°F | 89.6°F |
| Chaweng Beach | 90.0°F | 88.3°F | 89.2°F |
| Samet | 90.0°F | 88.1°F | 88.1°F |
| Taling Ngam Beach | 90.0°F | 88.1°F | 89.1°F |
| Choeng Mon Beach | 89.9°F | 88.3°F | 89.1°F |
| Samui | 89.9°F | 88.3°F | 89.1°F |
| Mae Nam Beach | 89.9°F | 88.2°F | 89.0°F |
| Bo Phut Beach | 89.9°F | 88.2°F | 89.0°F |
| Narathiwat | 89.8°F | 88.9°F | 89.5°F |
| Phangan | 89.8°F | 88.1°F | 88.8°F |
| Ko Phangan | 89.8°F | 88.2°F | 88.9°F |
| Surat Thani | 89.7°F | 87.5°F | 88.7°F |
| Prachuap Khiri Khan | 89.7°F | 87.8°F | 88.1°F |
| Phi Phi | 89.7°F | 87.4°F | 88.6°F |
| Krabi | 89.6°F | 87.4°F | 88.5°F |
| Cape Panwa | 89.5°F | 87.2°F | 88.4°F |
| Tao | 89.4°F | 87.9°F | 88.4°F |
| Koh Lanta | 89.4°F | 87.4°F | 88.4°F |
| Koh Chang | 89.4°F | 87.3°F | 87.8°F |
| Trat | 89.4°F | 87.3°F | 87.7°F |
| Ko Wai | 89.4°F | 87.2°F | 87.7°F |
| Nai Harn Beach | 89.4°F | 87.1°F | 88.3°F |
| Rawai Beach | 89.4°F | 87.1°F | 88.3°F |
| Chumphon | 89.3°F | 87.4°F | 88.0°F |
| Ko Mak | 89.3°F | 87.1°F | 87.7°F |
| Phuket | 89.3°F | 87.0°F | 88.1°F |
| Kata Beach | 89.3°F | 87.0°F | 88.2°F |
| Karon Beach | 89.3°F | 87.0°F | 88.2°F |
| Patong Beach | 89.2°F | 87.0°F | 88.1°F |
| Koh Kood | 89.2°F | 87.0°F | 87.6°F |
| Kalim Beach | 89.2°F | 86.9°F | 88.1°F |
| Nai Yang Beach | 89.2°F | 86.9°F | 88.0°F |
| Kamala Beach | 89.2°F | 86.9°F | 88.0°F |
| Surin Beach | 89.2°F | 86.9°F | 88.0°F |
| Bang Tao Beach | 89.2°F | 86.9°F | 88.0°F |
| Mai Khao Beach | 89.2°F | 86.9°F | 88.0°F |
| Khao Lak | 88.7°F | 86.5°F | 87.7°F |
| Similan | 88.1°F | 86.6°F | 87.5°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°
| Bangkok |  |
+88 |
| Chumphon |  |
+82 |
| Hua Hin | |
+80 |
| Koh Chang |  |
+86 |
| Krabi | |
+80 |
| Narathiwat | |
+84 |
| Pattani |  |
+82 |
| Pattaya | |
+82 |
| Phi Phi | |
+84 |
| Phuket | |
+86 |
| Prachuap Khiri Khan | |
+82 |
| Rayong | |
+80 |
| Samet | |
+86 |
| Samui | |
+86 |
| Surat Thani | |
+82 |
