The Thailand resorts with the warmest sea water temperature in December are Ko Li Pe, Khao Lak and Kata Beach.
Below you can see a list of all popular Thailand resorts and information about sea water temperature in December for the last two years.
| Resort Name | December 2025 | December 2024 | December 2023 |
|---|---|---|---|
| Ko Li Pe | 87.9°F | 88.9°F | 88.2°F |
| Khao Lak | 87.7°F | 88.0°F | 88.0°F |
| Kata Beach | 87.4°F | 88.3°F | 88.0°F |
| Karon Beach | 87.4°F | 88.3°F | 88.0°F |
| Krabi | 87.4°F | 87.7°F | 87.9°F |
| Rawai Beach | 87.4°F | 88.3°F | 88.1°F |
| Nai Harn Beach | 87.4°F | 88.3°F | 88.1°F |
| Phi Phi | 87.4°F | 88.2°F | 87.9°F |
| Patong Beach | 87.3°F | 88.2°F | 88.1°F |
| Surin Beach | 87.3°F | 88.1°F | 88.1°F |
| Kamala Beach | 87.3°F | 88.1°F | 88.1°F |
| Kalim Beach | 87.3°F | 88.2°F | 88.1°F |
| Bang Tao Beach | 87.3°F | 88.1°F | 88.1°F |
| Nai Yang Beach | 87.3°F | 88.0°F | 88.1°F |
| Mai Khao Beach | 87.3°F | 88.0°F | 88.1°F |
| Similan | 87.3°F | 88.1°F | 87.7°F |
| Phuket | 87.3°F | 88.1°F | 88.1°F |
| Cape Panwa | 87.2°F | 88.1°F | 88.1°F |
| Koh Lanta | 87.2°F | 87.6°F | 87.9°F |
| Koh Kood | 86.8°F | 88.0°F | 89.1°F |
| Hat Yai | 86.7°F | 86.8°F | 87.2°F |
| Narathiwat | 86.4°F | 86.9°F | 87.2°F |
| Pattani | 86.3°F | 86.8°F | 87.2°F |
| Ko Mak | 86.2°F | 87.4°F | 88.9°F |
| Koh Chang | 86.0°F | 87.2°F | 88.7°F |
| Ko Wai | 85.9°F | 87.1°F | 88.7°F |
| Trat | 85.7°F | 86.7°F | 88.3°F |
| Samet | 85.5°F | 86.9°F | 88.4°F |
| Lamai Beach | 85.5°F | 86.9°F | 87.4°F |
| Chaweng Beach | 85.5°F | 86.9°F | 87.4°F |
| Rayong | 85.5°F | 87.0°F | 88.4°F |
| Samui | 85.4°F | 86.9°F | 87.3°F |
| Taling Ngam Beach | 85.4°F | 86.6°F | 87.3°F |
| Choeng Mon Beach | 85.4°F | 86.9°F | 87.3°F |
| Mae Nam Beach | 85.4°F | 86.8°F | 87.3°F |
| Bo Phut Beach | 85.4°F | 86.8°F | 87.3°F |
| Tao | 84.9°F | 86.6°F | 87.2°F |
| Ko Phangan | 84.9°F | 86.8°F | 87.3°F |
| Phangan | 84.9°F | 86.7°F | 87.2°F |
| Koh Lan | 84.7°F | 86.7°F | 88.0°F |
| Jomtien | 84.6°F | 86.2°F | 87.7°F |
| Pattaya | 84.6°F | 86.2°F | 87.7°F |
| Surat Thani | 84.5°F | 85.2°F | 86.0°F |
| Chumphon | 84.4°F | 85.3°F | 86.9°F |
| Hua Hin | 83.7°F | 85.1°F | 86.8°F |
| Cha-am | 83.7°F | 85.2°F | 86.9°F |
| Prachuap Khiri Khan | 83.5°F | 85.4°F | 86.7°F |
| Bangkok | 83.4°F | 84.5°F | 86.4°F |
Please see following sea water temperature averages charts for the warmest Thailand resorts in December.
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 |  |
+80 |
| Bangkok |  |
+78 |
| Hua Hin | |
+76 |
| Karon Beach | |
+80 |
| Kata Beach | |
+80 |
| Khao Lak | |
+78 |
| Ko Li Pe | |
+84 |
| Koh Chang | |
+80 |
| Patong Beach | |
+80 |
| Pattaya | |
+74 |
| Phi Phi |  |
+82 |
| Phuket | |
+80 |
| Samet | |
+78 |
| Samui | |
+82 |
| Similan | |
+78 |
