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Warmest sea in Thailand

89 coastal locations in Thailand ranked by their year-round average sea temperature. The regional average is 29.5°C. The top of the list shows where to find the warmest water in a typical year. The bottom shows the coldest year-round coasts of the region.

Warmest location

Pak Nam Trang

29.8°C annual mean in Thailand

Regional average

29.5°C

across all 89 Thailand coastal locations

Warmest month

May

30.7°C region-wide average

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

Month by month across Thailand

Sea temperatures in Thailand swing from 28.1°C in January to 30.7°C in May on average across every coast we track. That spread of 3°C hides much bigger swings at individual locations.

Want a specific month? Pick one for a dedicated ranking:

Thailand sea temperature map

Today's pin colours show the latest daily reading at every Thailand location we track. Pick any pin for the location's full page.

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 warmest locations in Thailand

The warmest coastal locations across all of Thailand, sorted by year-round average. Click any place for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Pak Nam Trang Chang Wat Trang 29.8°C
2 Ko Don Ao Nang 29.8°C
3 Ko Koi Noi Satun 29.8°C
4 Langkawi Chang Wat Satun 29.8°C
5 Ko Lela Satun 29.8°C
6 Kantang 29.8°C
7 Ko Phetra Malacca 29.8°C
8 Ko Butang Satun 29.8°C
9 Ko Lipe 29.8°C
10 Ko Lanta 29.7°C
11 Ao Nang (Krabi) Chang Wat Krabi 29.7°C
12 Ao Muang Trat Chang Wat Trat 29.6°C
13 Ao Nang 29.6°C
14 Ban Ao Nang 29.6°C
15 Bangtao Beach 29.6°C
16 Ko Phi Phi Don 29.6°C
17 Krabi 29.6°C
18 Mai Khao Beach 29.6°C
19 Nai Yang Beach 29.6°C
20 Phi Phi Islands 29.6°C
21 Railay Beach 29.6°C
22 Ko Yao 29.6°C
23 Ko Kut 29.6°C
24 Ko Taphao Noi (Phuket) Chang Wat Phuket 29.6°C
25 Banana Beach 29.5°C
Show 25 more ▸
26 Cape Panwa 29.5°C
27 Kalim Beach 29.5°C
28 Kamala Beach 29.5°C
29 Karon Beach 29.5°C
30 Kata Beach 29.5°C
31 Nai Harn Beach 29.5°C
32 Patong Beach 29.5°C
33 Phuket 29.5°C
34 Rawai Beach 29.5°C
35 Surin Beach 29.5°C
36 Bangkok Bar Central Thailand 29.5°C
37 Chong Samet Chumphon 29.5°C
38 Bang Lamung 29.5°C
39 Jomtien Beach 29.5°C
40 Ko Chang Tai 29.5°C
41 Ko Chang 29.5°C
42 Ko Lan 29.5°C
43 Ko Si Chang 29.5°C
44 Laem Ngop 29.5°C
45 Mae Klong Chang Wat Samut Songkhram 29.5°C
46 Pattaya 29.5°C
47 Si Racha 29.5°C
48 Bangkok 29.5°C
49 Ko Prap Surat Thani Province 29.5°C
50 Phra Pradaeng 29.5°C

Coldest 10 in Thailand for contrast

Same data, sorted the other way. Useful if you want to know which Thailand coasts stay coldest year-round.

# Location Annual mean
1 Ban Mai 28.8°C
2 Ban Talat Yai 28.8°C
3 Ko Lak (Prachuap Khiri Khan) Prachuap Khiri Khan 29.1°C
4 Prachuap Khiri Khan 29.1°C
5 Ranong 29.1°C
6 Pak Nam Ranong Chang Wat Ranong 29.1°C
7 Surin Islands 29.2°C
8 Ko Tao 29.2°C
9 Ko Surin Phang-nga 29.3°C
10 Lipa Noi 29.3°C

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