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Warmest sea in Thailand in August

89 coastal locations in Thailand ranked by their typical August sea temperature. Region-wide average in August: 29.7°C. The top of the list is where to find the warmest swimming this month.

Warmest in August

Ko Koi Noi

30.4°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, useful for trip planning weeks or months ahead.

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 Thailand locations in August

Sorted by the typical August mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# 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
11 Bangkok Bar Central Thailand 30.1°C
12 Pattani 30.0°C
13 Yaring 30.0°C
14 Ao Nang (Krabi) Chang Wat Krabi 30.0°C
15 Ko Lanta 30.0°C
16 Narathiwat 30.0°C
17 Tak Bai 30.0°C
18 Ko Prap Surat Thani Province 29.9°C
19 Ao Nang 29.9°C
20 Ban Ao Nang 29.9°C
21 Ko Phi Phi Don 29.9°C
22 Krabi 29.9°C
23 Phi Phi Islands 29.9°C
24 Railay Beach 29.9°C
25 Bangtao Beach 29.9°C
Show 25 more ▸
26 Ko Yao 29.9°C
27 Mai Khao Beach 29.9°C
28 Nai Yang Beach 29.9°C
29 Bangkok 29.9°C
30 Phra Pradaeng 29.9°C
31 Ko Taphao Noi (Phuket) Chang Wat Phuket 29.9°C
32 Ko Si Chang 29.8°C
33 Si Racha 29.8°C
34 Bang Lamung 29.8°C
35 Jomtien Beach 29.8°C
36 Ko Lan 29.8°C
37 Pattaya 29.8°C
38 Khanom Beach 29.8°C
39 Banana Beach 29.8°C
40 Ao Sattahip Chonburi 29.8°C
41 Chong Khram Ranong 29.8°C
42 Cape Panwa 29.7°C
43 Kalim Beach 29.7°C
44 Kamala Beach 29.7°C
45 Karon Beach 29.7°C
46 Kata Beach 29.7°C
47 Lang Suan Chumphon 29.7°C
48 Nai Harn Beach 29.7°C
49 Patong Beach 29.7°C
50 Phuket 29.7°C

Coldest 10 in Thailand in August

Same data the other way. Helpful if you want to know which Thailand coasts to avoid for swimming in August.

# 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

More on this region