The Thailand resorts with the warmest sea water temperature in April are Koh Lanta, Trat and Krabi.
Below you can see a list of all popular Thailand resorts and information about sea water temperature in April for the last two years.
| Resort Name | April 2026 | April 2025 | April 2024 |
|---|---|---|---|
| Koh Lanta | 93.0°F | 91.6°F | 93.2°F |
| Trat | 92.7°F | 91.7°F | 94.1°F |
| Krabi | 92.7°F | 91.4°F | 93.2°F |
| Chumphon | 92.4°F | 90.8°F | 93.8°F |
| Koh Chang | 92.4°F | 90.9°F | 93.6°F |
| Hat Yai | 92.3°F | 91.3°F | 93.0°F |
| Ko Mak | 92.3°F | 90.5°F | 93.0°F |
| Ko Wai | 92.3°F | 90.6°F | 93.3°F |
| Samet | 92.2°F | 91.0°F | 93.1°F |
| Rayong | 92.2°F | 91.0°F | 93.3°F |
| Koh Kood | 92.1°F | 90.7°F | 92.9°F |
| Surat Thani | 91.8°F | 91.3°F | 92.5°F |
| Cha-am | 91.8°F | 91.2°F | 92.5°F |
| Pattaya | 91.6°F | 90.2°F | 92.4°F |
| Jomtien | 91.6°F | 90.2°F | 92.4°F |
| Hua Hin | 91.6°F | 90.9°F | 92.3°F |
| Phi Phi | 91.6°F | 90.8°F | 92.1°F |
| Cape Panwa | 91.4°F | 90.4°F | 91.8°F |
| Ko Li Pe | 91.4°F | 90.5°F | 91.9°F |
| Phuket | 91.4°F | 90.4°F | 91.7°F |
| Mai Khao Beach | 91.3°F | 90.5°F | 91.7°F |
| Bangkok | 91.3°F | 90.5°F | 92.2°F |
| Nai Yang Beach | 91.3°F | 90.5°F | 91.6°F |
| Taling Ngam Beach | 91.2°F | 90.7°F | 92.6°F |
| Khao Lak | 91.2°F | 90.3°F | 91.3°F |
| Bang Tao Beach | 91.2°F | 90.3°F | 91.5°F |
| Kamala Beach | 91.2°F | 90.3°F | 91.5°F |
| Surin Beach | 91.2°F | 90.3°F | 91.5°F |
| Tao | 91.2°F | 90.1°F | 91.6°F |
| Kalim Beach | 91.1°F | 90.3°F | 91.4°F |
| Patong Beach | 91.1°F | 90.2°F | 91.3°F |
| Phangan | 91.0°F | 90.6°F | 92.2°F |
| Similan | 91.0°F | 90.5°F | 91.2°F |
| Karon Beach | 91.0°F | 90.1°F | 91.3°F |
| Kata Beach | 91.0°F | 90.1°F | 91.3°F |
| Pattani | 91.0°F | 90.2°F | 91.7°F |
| Nai Harn Beach | 91.0°F | 90.1°F | 91.4°F |
| Rawai Beach | 91.0°F | 90.1°F | 91.4°F |
| Bo Phut Beach | 91.0°F | 90.5°F | 92.4°F |
| Mae Nam Beach | 91.0°F | 90.5°F | 92.4°F |
| Koh Lan | 90.9°F | 90.1°F | 92.0°F |
| Samui | 90.8°F | 90.5°F | 92.3°F |
| Ko Phangan | 90.8°F | 90.5°F | 92.1°F |
| Narathiwat | 90.8°F | 89.8°F | 91.7°F |
| Lamai Beach | 90.8°F | 90.5°F | 92.3°F |
| Chaweng Beach | 90.8°F | 90.5°F | 92.3°F |
| Choeng Mon Beach | 90.7°F | 90.5°F | 92.3°F |
| Prachuap Khiri Khan | 90.5°F | 89.8°F | 91.4°F |
Please see following sea water temperature averages charts for the warmest Thailand resorts in April.
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 |  |
+90 |
| Bangkok |  |
+102 |
| Hua Hin |  |
+94 |
| Karon Beach | |
+90 |
| Kata Beach | |
+90 |
| Khao Lak |  |
+92 |
| Ko Li Pe | |
+88 |
| Koh Chang | |
+90 |
| Patong Beach | |
+90 |
| Pattaya | |
+92 |
| Phangan | |
+90 |
| Phi Phi | |
+90 |
| Phuket | |
+90 |
| Samet | |
+92 |
| Samui | |
+90 |
