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Coldest sea in Thailand in August

89 coastal locations in Thailand ranked by typical August sea temperature, coldest first. Region-wide average in August: 29.7°C.

Coldest in August

Ban Mai

28.9°C August mean in Thailand

Regional August average

29.7°C

across all 89 coastal locations in Thailand

Vs annual mean

+0.3°C

above the year-round regional average

What the Thailand sea feels like in August

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 August fits in the year

August 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 August 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 August

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

# Location August mean
1 Ban Mai 28.9°C
2 Ban Talat Yai 28.9°C
3 Surin Islands 29.1°C
4 Ranong 29.1°C
5 Prachuap Khiri Khan 29.2°C
6 Similan Islands 29.2°C
7 Pak Nam Ranong Chang Wat Ranong 29.3°C
8 Ko Surin Phang-nga 29.3°C
9 Khao Lak 29.4°C
10 Ko Mak 29.4°C
11 Ko Wai 29.4°C
12 Chang Ko Phra Thong Phang-nga 29.4°C
13 Ko Lak (Prachuap Khiri Khan) Prachuap Khiri Khan 29.4°C
14 Ko Miang Phangnga 29.4°C
15 Ko Chang Tai 29.4°C
16 Ko Chang 29.4°C
17 Laem Ngop 29.4°C
18 Ko Tao 29.4°C
19 Laem Sing 29.4°C
20 Map Ta Phut 29.4°C
21 Rayong 29.4°C
22 Samet 29.4°C
23 Ko Kut 29.5°C
24 Lipa Noi 29.6°C
25 Mae Nam 29.6°C
Show 25 more ▸
26 Ao Muang Trat Chang Wat Trat 29.6°C
27 Bo Phut Beach 29.6°C
28 Chaweng Beach 29.6°C
29 Choeng Mon Beach 29.6°C
30 Koh Phangan 29.6°C
31 Koh Samui 29.6°C
32 Mae Nam Beach 29.6°C
33 Hua Hin 29.7°C
34 Chong Samet Chumphon 29.7°C
35 Taling Ngam Beach 29.7°C
36 Sattahip 29.7°C
37 Lamai Beach 29.7°C
38 Cape Panwa 29.7°C
39 Kalim Beach 29.7°C
40 Kamala Beach 29.7°C
41 Karon Beach 29.7°C
42 Kata Beach 29.7°C
43 Lang Suan Chumphon 29.7°C
44 Nai Harn Beach 29.7°C
45 Patong Beach 29.7°C
46 Phuket 29.7°C
47 Rawai Beach 29.7°C
48 Surin Beach 29.7°C
49 Ao Sattahip Chonburi 29.8°C
50 Chong Khram Ranong 29.8°C

Warmest 10 in Thailand in August

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

# Location August mean
1 Ko Koi Noi Satun 30.4°C
2 Langkawi Chang Wat Satun 30.4°C
3 Ko Lela Satun 30.3°C
4 Ko Butang Satun 30.3°C
5 Ko Don Ao Nang 30.3°C
6 Pak Nam Trang Chang Wat Trang 30.3°C
7 Ko Lipe 30.2°C
8 Ko Phetra Malacca 30.2°C
9 Mae Klong Chang Wat Samut Songkhram 30.2°C
10 Kantang 30.1°C

More on this region