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Coldest sea in Thailand in January

89 coastal locations in Thailand ranked by typical January sea temperature, coldest first. Region-wide average in January: 28.1°C.

Coldest in January

Ban Mai

25.9°C January mean in Thailand

Regional January average

28.1°C

across all 89 coastal locations in Thailand

Vs annual mean

-1.3°C

below the year-round regional average

What the Thailand sea feels like in January

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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  • 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 January fits in the year

January 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 January 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 January

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

# Location January mean
1 Ban Mai 25.9°C
2 Ban Talat Yai 25.9°C
3 Mae Klong Chang Wat Samut Songkhram 27.1°C
4 Hua Hin 27.3°C
5 Bangkok Bar Central Thailand 27.3°C
6 Ko Lak (Prachuap Khiri Khan) Prachuap Khiri Khan 27.3°C
7 Bangkok 27.4°C
8 Phra Pradaeng 27.4°C
9 Ko Si Chang 27.5°C
10 Si Racha 27.5°C
11 Prachuap Khiri Khan 27.5°C
12 Bang Lamung 27.6°C
13 Jomtien Beach 27.6°C
14 Ko Lan 27.6°C
15 Pattaya 27.6°C
16 Sattahip 27.7°C
17 Lang Suan Chumphon 27.8°C
18 Ao Sattahip Chonburi 27.8°C
19 Chong Khram Ranong 27.8°C
20 Chong Samet Chumphon 27.8°C
21 Ko Prap Surat Thani Province 27.9°C
22 Ko Tao 27.9°C
23 Lipa Noi 27.9°C
24 Mae Nam 27.9°C
25 Pak Nam Ranong Chang Wat Ranong 27.9°C
Show 25 more ▸
26 Taling Ngam Beach 27.9°C
27 Bo Phut Beach 27.9°C
28 Chaweng Beach 27.9°C
29 Choeng Mon Beach 27.9°C
30 Koh Phangan 27.9°C
31 Koh Samui 27.9°C
32 Mae Nam Beach 27.9°C
33 Khanom Beach 28.0°C
34 Lamai Beach 28.0°C
35 Narathiwat 28.0°C
36 Ranong 28.0°C
37 Tak Bai 28.0°C
38 Rayong 28.0°C
39 Samet 28.0°C
40 Pattani 28.1°C
41 Yaring 28.1°C
42 Map Ta Phut 28.1°C
43 Laem Sing 28.2°C
44 Chang Ko Phra Thong Phang-nga 28.3°C
45 Surin Islands 28.3°C
46 Ao Muang Trat Chang Wat Trat 28.4°C
47 Ko Kut 28.4°C
48 Ko Chang Tai 28.4°C
49 Ko Chang 28.4°C
50 Ko Surin Phang-nga 28.4°C

Warmest 10 in Thailand in January

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

# Location January mean
1 Ko Lipe 28.8°C
2 Kantang 28.8°C
3 Ko Butang Satun 28.8°C
4 Khao Lak 28.7°C
5 Banana Beach 28.7°C
6 Ko Lanta 28.7°C
7 Ko Phetra Malacca 28.7°C
8 Pak Nam Trang Chang Wat Trang 28.7°C
9 Cape Panwa 28.7°C
10 Kalim Beach 28.7°C

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