In December warmest sea in Thailand is usually observed in the following locations: Ko Li Pe, Khao Lak, Koh Lanta.
Table below shows the average sea water temperature for marine resorts of Thailand in December for the last three years.
| Place name | December 2025 | December 2024 | December 2023 |
|---|---|---|---|
| Ko Li Pe | 84.1°F | 85.0°F | 84.4°F |
| Khao Lak | 83.9°F | 84.2°F | 84.2°F |
| Koh Lanta | 83.6°F | 83.9°F | 84.1°F |
| Karon Beach | 83.6°F | 84.4°F | 84.2°F |
| Kata Beach | 83.6°F | 84.4°F | 84.2°F |
| Krabi | 83.6°F | 84.0°F | 84.1°F |
| Surin Beach | 83.5°F | 84.3°F | 84.3°F |
| Bang Tao Beach | 83.5°F | 84.3°F | 84.3°F |
| Kamala Beach | 83.5°F | 84.3°F | 84.3°F |
| Kalim Beach | 83.5°F | 84.4°F | 84.2°F |
| Nai Harn Beach | 83.5°F | 84.5°F | 84.3°F |
| Rawai Beach | 83.5°F | 84.5°F | 84.3°F |
| Patong Beach | 83.5°F | 84.4°F | 84.2°F |
| Phi Phi | 83.5°F | 84.4°F | 84.1°F |
| Mai Khao Beach | 83.5°F | 84.2°F | 84.3°F |
| Nai Yang Beach | 83.5°F | 84.2°F | 84.3°F |
| Similan | 83.5°F | 84.3°F | 84.0°F |
| Phuket | 83.4°F | 84.2°F | 84.3°F |
| Cape Panwa | 83.3°F | 84.3°F | 84.3°F |
| Hat Yai | 83.1°F | 83.1°F | 83.5°F |
| Narathiwat | 83.0°F | 83.2°F | 83.4°F |
| Pattani | 82.8°F | 83.1°F | 83.5°F |
| Koh Kood | 82.7°F | 84.2°F | 85.1°F |
| Ko Mak | 82.1°F | 83.7°F | 85.0°F |
| Koh Chang | 82.0°F | 83.5°F | 84.8°F |
| Ko Wai | 81.9°F | 83.4°F | 84.8°F |
| Trat | 81.8°F | 83.0°F | 84.5°F |
| Samet | 81.5°F | 83.3°F | 84.6°F |
| Rayong | 81.5°F | 83.3°F | 84.5°F |
| Chaweng Beach | 81.4°F | 83.2°F | 83.6°F |
| Lamai Beach | 81.3°F | 83.2°F | 83.6°F |
| Choeng Mon Beach | 81.3°F | 83.2°F | 83.6°F |
| Samui | 81.3°F | 83.2°F | 83.6°F |
| Mae Nam Beach | 81.3°F | 83.1°F | 83.6°F |
| Bo Phut Beach | 81.3°F | 83.1°F | 83.6°F |
| Tao | 81.3°F | 82.9°F | 83.5°F |
| Taling Ngam Beach | 81.2°F | 82.9°F | 83.6°F |
| Ko Phangan | 81.0°F | 83.1°F | 83.5°F |
| Phangan | 81.0°F | 83.1°F | 83.5°F |
| Koh Lan | 81.0°F | 83.1°F | 84.2°F |
| Surat Thani | 81.0°F | 81.6°F | 82.4°F |
| Jomtien | 80.8°F | 82.6°F | 83.9°F |
| Pattaya | 80.8°F | 82.6°F | 83.9°F |
| Chumphon | 80.7°F | 81.8°F | 83.2°F |
| Cha-am | 79.8°F | 81.7°F | 83.2°F |
| Hua Hin | 79.7°F | 81.6°F | 83.1°F |
| Prachuap Khiri Khan | 79.7°F | 81.9°F | 83.0°F |
| Bangkok | 79.6°F | 81.0°F | 82.8°F |
Charts below show average sea water temperature for Thailand resorts with the warmest sea in December.
You can also check other months of the year to see sea temperature of Thailand resorts at that time.
Places in Thailand:
Name
°F
