The Thailand resorts with the warmest sea water temperature in September are Hua Hin, Hat Yai and Bangkok.
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 |
|---|---|---|---|
| Hua Hin | 91.1°F | 88.7°F | 88.9°F |
| Hat Yai | 91.1°F | 89.5°F | 90.2°F |
| Bangkok | 90.9°F | 89.0°F | 89.1°F |
| Ko Li Pe | 90.5°F | 88.2°F | 89.3°F |
| Pattaya | 90.5°F | 88.7°F | 88.8°F |
| Koh Lan | 90.4°F | 88.7°F | 88.8°F |
| Jomtien | 90.4°F | 88.6°F | 88.7°F |
| Rayong | 90.2°F | 88.3°F | 88.3°F |
| Pattani | 90.2°F | 88.6°F | 89.5°F |
| Koh Lanta | 90.1°F | 87.3°F | 88.3°F |
| Lamai Beach | 90.1°F | 88.3°F | 89.3°F |
| Samet | 90.1°F | 88.1°F | 88.2°F |
| Chaweng Beach | 90.1°F | 88.3°F | 89.2°F |
| Phi Phi | 90.0°F | 87.4°F | 88.5°F |
| Narathiwat | 90.0°F | 88.9°F | 89.4°F |
| Krabi | 90.0°F | 87.4°F | 88.4°F |
| Taling Ngam Beach | 90.0°F | 88.1°F | 89.1°F |
| Choeng Mon Beach | 90.0°F | 88.3°F | 89.1°F |
| Samui | 90.0°F | 88.2°F | 89.1°F |
| Bo Phut Beach | 89.9°F | 88.2°F | 89.0°F |
| Mae Nam Beach | 89.9°F | 88.2°F | 89.0°F |
| Phangan | 89.8°F | 88.1°F | 88.8°F |
| Ko Phangan | 89.8°F | 88.1°F | 88.9°F |
| Cape Panwa | 89.8°F | 87.1°F | 88.3°F |
| Prachuap Khiri Khan | 89.8°F | 87.7°F | 88.1°F |
| Surat Thani | 89.7°F | 87.5°F | 88.7°F |
| Koh Chang | 89.7°F | 87.3°F | 87.8°F |
| Ko Wai | 89.7°F | 87.2°F | 87.7°F |
| Nai Harn Beach | 89.6°F | 87.1°F | 88.3°F |
| Trat | 89.6°F | 87.3°F | 87.7°F |
| Rawai Beach | 89.6°F | 87.1°F | 88.3°F |
| Ko Mak | 89.6°F | 87.0°F | 87.7°F |
| Phuket | 89.6°F | 86.9°F | 88.1°F |
| Kata Beach | 89.5°F | 87.0°F | 88.2°F |
| Patong Beach | 89.5°F | 86.9°F | 88.1°F |
| Karon Beach | 89.5°F | 87.0°F | 88.2°F |
| Mai Khao Beach | 89.5°F | 86.8°F | 88.0°F |
| Nai Yang Beach | 89.5°F | 86.9°F | 88.0°F |
| Kalim Beach | 89.5°F | 86.9°F | 88.1°F |
| Tao | 89.5°F | 87.9°F | 88.4°F |
| Koh Kood | 89.5°F | 86.9°F | 87.6°F |
| Kamala Beach | 89.5°F | 86.9°F | 88.0°F |
| Surin Beach | 89.5°F | 86.9°F | 88.0°F |
| Bang Tao Beach | 89.5°F | 86.9°F | 88.0°F |
| Chumphon | 89.4°F | 87.4°F | 88.0°F |
| Khao Lak | 89.2°F | 86.5°F | 87.6°F |
| Similan | 88.3°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 |  |
+100 |
| Chumphon |  |
+86 |
| Hua Hin |  |
+92 |
| Koh Chang | |
+88 |
| Krabi |  |
+82 |
| Narathiwat | |
+92 |
| Pattani |  |
+90 |
| Pattaya | |
+90 |
| Phi Phi | |
+86 |
| Phuket | |
+84 |
| Prachuap Khiri Khan | |
+90 |
| Rayong | |
+90 |
| Samet | |
+88 |
| Samui | |
+84 |
| Surat Thani | |
+84 |
