Where is the sea warmest in Asia in December?
In December the warmest sea in Asia is at Surabaya, Indonesia, at 29.9°C. 313 of 465 cities measured are comfortable this month.
| # | City | Country | Sea | Swimming |
|---|---|---|---|---|
| 1 | Surabaya | Indonesia | 29.9°C | Bath-like |
| 2 | Kupang | Indonesia | 29.9°C | Bath-like |
| 3 | Serasa | Brunei | 29.9°C | Bath-like |
| 4 | Bandar Seri Begawan | Brunei | 29.8°C | Bath-like |
| 5 | Labuan | Malaysia | 29.8°C | Bath-like |
| 6 | Kuala Penyu | Malaysia | 29.8°C | Bath-like |
| 7 | Balikpapan | Indonesia | 29.8°C | Bath-like |
| 8 | Kendari | Indonesia | 29.8°C | Bath-like |
| 9 | Jayapura | Indonesia | 29.8°C | Bath-like |
| 10 | Kota Kinabalu | Malaysia | 29.7°C | Bath-like |
| 11 | Cotabato | Philippines | 29.7°C | Bath-like |
| 12 | Pontianak | Indonesia | 29.7°C | Bath-like |
| 13 | Cirebon | Indonesia | 29.7°C | Bath-like |
| 14 | Tutong | Brunei | 29.7°C | Bath-like |
| 15 | Kampung Lugu | Brunei | 29.7°C | Bath-like |
| 16 | Semarang | Indonesia | 29.7°C | Bath-like |
| 17 | Kuala Belait | Brunei | 29.6°C | Bath-like |
| 18 | Makassar | Indonesia | 29.6°C | Bath-like |
| 19 | Miri | Malaysia | 29.6°C | Bath-like |
| 20 | Liang | Brunei | 29.6°C | Bath-like |
| 21 | Klang | Malaysia | 29.6°C | Bath-like |
| 22 | Nibong Tebal | Malaysia | 29.6°C | Bath-like |
| 23 | Bintulu | Malaysia | 29.6°C | Bath-like |
| 24 | Manado | Indonesia | 29.5°C | Bath-like |
| 25 | Ambon | Indonesia | 29.5°C | Bath-like |
Ranked on the NOAA OISST monthly climatology — a long-run average for December, not a forecast. A given December will run warmer or cooler than this, and the sea is warmest late in the afternoon and late in the season.