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Coldest sea in Thailand in December

89 coastal locations in Thailand ranked by typical December sea temperature, coldest first. Region-wide average in December: 28.4°C.

Coldest in December

Ban Mai

27.1°C December mean in Thailand

Regional December average

28.4°C

across all 89 coastal locations in Thailand

Vs annual mean

-1.0°C

below the year-round regional average

What the Thailand sea feels like in December

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

Thailand monthly average 28.1°C to 30.7°C
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D
  • Warmest month May 30.7°C
  • Coldest month January 28.1°C
  • Annual mean 29.5°C
  • Months above 20°C 12 of 12

Where December fits in the year

December sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Thailand month rankings:

Thailand sea temperature map (live)

The map shows today's latest reading at every Thailand location. The list below is based on the typical December mean.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest Thailand locations in December

Sorted by typical December mean from a decade of daily readings, coldest first. Click any place for the full location page.

# Location December mean
1 Ban Mai 27.1°C
2 Ban Talat Yai 27.1°C
3 Mae Klong Chang Wat Samut Songkhram 27.4°C
4 Bangkok Bar Central Thailand 27.7°C
5 Lang Suan Chumphon 27.7°C
6 Ko Lak (Prachuap Khiri Khan) Prachuap Khiri Khan 27.7°C
7 Ko Prap Surat Thani Province 27.7°C
8 Hua Hin 27.8°C
9 Bangkok 27.8°C
10 Phra Pradaeng 27.8°C
11 Ko Si Chang 27.9°C
12 Si Racha 27.9°C
13 Pak Nam Ranong Chang Wat Ranong 28.0°C
14 Prachuap Khiri Khan 28.0°C
15 Taling Ngam Beach 28.0°C
16 Lipa Noi 28.0°C
17 Mae Nam 28.0°C
18 Khanom Beach 28.0°C
19 Bang Lamung 28.0°C
20 Jomtien Beach 28.0°C
21 Ko Lan 28.0°C
22 Pattaya 28.0°C
23 Ko Tao 28.1°C
24 Bo Phut Beach 28.1°C
25 Chaweng Beach 28.1°C
Show 25 more ▸
26 Choeng Mon Beach 28.1°C
27 Koh Phangan 28.1°C
28 Koh Samui 28.1°C
29 Lamai Beach 28.1°C
30 Mae Nam Beach 28.1°C
31 Ranong 28.2°C
32 Sattahip 28.2°C
33 Chong Samet Chumphon 28.3°C
34 Ao Sattahip Chonburi 28.3°C
35 Chong Khram Ranong 28.3°C
36 Narathiwat 28.3°C
37 Pattani 28.3°C
38 Yaring 28.3°C
39 Tak Bai 28.3°C
40 Chang Ko Phra Thong Phang-nga 28.4°C
41 Rayong 28.4°C
42 Samet 28.4°C
43 Surin Islands 28.4°C
44 Laem Sing 28.5°C
45 Ko Surin Phang-nga 28.5°C
46 Map Ta Phut 28.5°C
47 Ao Nang (Krabi) Chang Wat Krabi 28.7°C
48 Ko Miang Phangnga 28.7°C
49 Ao Muang Trat Chang Wat Trat 28.7°C
50 Ko Chang Tai 28.7°C

Warmest 10 in Thailand in December

Same data the other way. The warmest spots for the same month.

# Location December mean
1 Ko Lipe 29.1°C
2 Ko Butang Satun 29.0°C
3 Kantang 29.0°C
4 Banana Beach 29.0°C
5 Ko Lanta 28.9°C
6 Cape Panwa 28.9°C
7 Kalim Beach 28.9°C
8 Kamala Beach 28.9°C
9 Karon Beach 28.9°C
10 Kata Beach 28.9°C

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