The Thailand resorts with the warmest sea water temperature in May are Trat, Rayong and Hat Yai.
Below you can see a list of all popular Thailand resorts and information about sea water temperature in May for the last two years.
| Resort Name | May 2026 | May 2025 | May 2024 |
|---|---|---|---|
| Trat | 92.8°F | 92.2°F | 93.7°F |
| Rayong | 92.6°F | 92.1°F | 93.5°F |
| Hat Yai | 92.6°F | 91.5°F | 93.9°F |
| Koh Chang | 92.5°F | 91.8°F | 94.1°F |
| Samet | 92.4°F | 92.2°F | 93.4°F |
| Cha-am | 92.3°F | 91.8°F | 93.2°F |
| Ko Wai | 92.3°F | 92.0°F | 93.8°F |
| Ko Li Pe | 92.2°F | 91.0°F | 92.9°F |
| Koh Lanta | 92.1°F | 90.6°F | 93.3°F |
| Bangkok | 92.1°F | 91.5°F | 92.8°F |
| Ko Mak | 92.1°F | 92.0°F | 93.6°F |
| Jomtien | 92.1°F | 91.4°F | 93.1°F |
| Koh Kood | 92.1°F | 91.9°F | 93.6°F |
| Pattaya | 92.1°F | 91.4°F | 93.1°F |
| Koh Lan | 92.1°F | 91.4°F | 93.1°F |
| Hua Hin | 92.1°F | 91.8°F | 92.9°F |
| Phi Phi | 92.0°F | 90.8°F | 93.0°F |
| Krabi | 92.0°F | 90.8°F | 92.8°F |
| Cape Panwa | 91.8°F | 91.1°F | 92.8°F |
| Mai Khao Beach | 91.7°F | 90.4°F | 92.2°F |
| Phuket | 91.7°F | 90.6°F | 92.6°F |
| Nai Yang Beach | 91.6°F | 90.4°F | 92.3°F |
| Kalim Beach | 91.6°F | 90.6°F | 92.4°F |
| Kamala Beach | 91.6°F | 90.5°F | 92.4°F |
| Bang Tao Beach | 91.6°F | 90.5°F | 92.4°F |
| Surin Beach | 91.6°F | 90.5°F | 92.4°F |
| Nai Harn Beach | 91.5°F | 90.8°F | 92.5°F |
| Rawai Beach | 91.5°F | 90.8°F | 92.5°F |
| Patong Beach | 91.5°F | 90.6°F | 92.5°F |
| Karon Beach | 91.5°F | 90.7°F | 92.5°F |
| Kata Beach | 91.5°F | 90.7°F | 92.5°F |
| Pattani | 91.4°F | 91.3°F | 92.9°F |
| Taling Ngam Beach | 91.3°F | 91.3°F | 93.6°F |
| Chumphon | 91.3°F | 91.3°F | 93.5°F |
| Narathiwat | 91.3°F | 91.1°F | 92.7°F |
| Lamai Beach | 91.2°F | 91.3°F | 93.3°F |
| Chaweng Beach | 91.1°F | 91.2°F | 93.3°F |
| Similan | 91.1°F | 90.4°F | 91.9°F |
| Khao Lak | 91.1°F | 90.1°F | 91.4°F |
| Samui | 91.1°F | 91.3°F | 93.3°F |
| Choeng Mon Beach | 91.1°F | 91.2°F | 93.3°F |
| Bo Phut Beach | 91.1°F | 91.2°F | 93.3°F |
| Mae Nam Beach | 91.1°F | 91.2°F | 93.3°F |
| Surat Thani | 90.9°F | 91.2°F | 92.4°F |
| Phangan | 90.9°F | 91.4°F | 93.1°F |
| Ko Phangan | 90.9°F | 91.3°F | 93.1°F |
| Tao | 90.8°F | 91.2°F | 92.9°F |
| Prachuap Khiri Khan | 90.7°F | 90.8°F | 92.6°F |
Please see following sea water temperature averages charts for the warmest Thailand resorts in May.
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 |  |
+86 |
| Bangkok |  |
+94 |
| Cape Panwa | |
+86 |
| Hua Hin |  |
+92 |
| Karon Beach | |
+86 |
| Kata Beach | |
+86 |
| Khao Lak | |
+88 |
| Koh Chang | |
+88 |
| Nai Yang Beach | |
+86 |
| Pattaya | |
+90 |
| Phangan | |
+88 |
| Phi Phi | |
+88 |
| Phuket |  |
+88 |
| Samet | |
+90 |
| Samui | |
+88 |
