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Warmest sea in Thailand in May

89 coastal locations in Thailand ranked by their typical May sea temperature. Region-wide average in May: 30.7°C. The top of the list is where to find the warmest swimming this month.

Warmest in May

Mae Klong

31.2°C May mean in Thailand

Regional May average

30.7°C

across all 89 coastal locations in Thailand

Vs annual mean

+1.3°C

above the year-round regional average

What the Thailand sea feels like in May

Water at this temperature is very warm and you should look to bathe only. Avoid any kind of strenuous swimming as there is a real risk of heat stroke at this temperature.

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 May fits in the year

May 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 May 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 May

Sorted by the typical May 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 May mean
1 Mae Klong Chang Wat Samut Songkhram 31.2°C
2 Bangkok Bar Central Thailand 31.1°C
3 Bangkok 31.1°C
4 Phra Pradaeng 31.1°C
5 Ko Si Chang 31.1°C
6 Si Racha 31.1°C
7 Ao Muang Trat Chang Wat Trat 31.1°C
8 Bang Lamung 31.1°C
9 Jomtien Beach 31.1°C
10 Ko Lan 31.1°C
11 Pattaya 31.1°C
12 Sattahip 31.0°C
13 Ko Prap Surat Thani Province 31.0°C
14 Pak Nam Trang Chang Wat Trang 31.0°C
15 Chong Samet Chumphon 31.0°C
16 Ko Kut 31.0°C
17 Ko Koi Noi Satun 30.9°C
18 Langkawi Chang Wat Satun 30.9°C
19 Rayong 30.9°C
20 Samet 30.9°C
21 Hua Hin 30.9°C
22 Map Ta Phut 30.9°C
23 Ko Don Ao Nang 30.9°C
24 Ao Sattahip Chonburi 30.9°C
25 Chong Khram Ranong 30.9°C
Show 25 more ▸
26 Laem Sing 30.9°C
27 Ko Phetra Malacca 30.9°C
28 Ko Chang Tai 30.9°C
29 Ko Chang 30.9°C
30 Laem Ngop 30.9°C
31 Ko Lela Satun 30.8°C
32 Lang Suan Chumphon 30.8°C
33 Ao Nang (Krabi) Chang Wat Krabi 30.8°C
34 Khanom Beach 30.8°C
35 Kantang 30.8°C
36 Taling Ngam Beach 30.8°C
37 Ban Mai 30.8°C
38 Ban Talat Yai 30.8°C
39 Ko Mak 30.8°C
40 Ko Wai 30.8°C
41 Lipa Noi 30.7°C
42 Mae Nam 30.7°C
43 Lamai Beach 30.7°C
44 Chang Ko Phra Thong Phang-nga 30.7°C
45 Bo Phut Beach 30.7°C
46 Chaweng Beach 30.7°C
47 Choeng Mon Beach 30.7°C
48 Koh Phangan 30.7°C
49 Koh Samui 30.7°C
50 Mae Nam Beach 30.7°C

Coldest 10 in Thailand in May

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

# Location May mean
1 Khao Lak 30.3°C
2 Similan Islands 30.3°C
3 Banana Beach 30.4°C
4 Cape Panwa 30.4°C
5 Kalim Beach 30.4°C
6 Kamala Beach 30.4°C
7 Karon Beach 30.4°C
8 Kata Beach 30.4°C
9 Nai Harn Beach 30.4°C
10 Patong Beach 30.4°C

More on this region