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Coldest sea in Thailand in May

89 coastal locations in Thailand ranked by typical May sea temperature, coldest first. Region-wide average in May: 30.7°C.

Coldest in May

Khao Lak

30.3°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.

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 May

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

# 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
11 Phuket 30.4°C
12 Rawai Beach 30.4°C
13 Surin Beach 30.4°C
14 Ko Miang Phangnga 30.4°C
15 Surin Islands 30.4°C
16 Ko Lak (Prachuap Khiri Khan) Prachuap Khiri Khan 30.4°C
17 Ko Taphao Noi (Phuket) Chang Wat Phuket 30.5°C
18 Ko Lipe 30.5°C
19 Ko Surin Phang-nga 30.5°C
20 Ranong 30.6°C
21 Pattani 30.6°C
22 Yaring 30.6°C
23 Narathiwat 30.6°C
24 Ko Tao 30.6°C
25 Ko Yao 30.6°C
Show 25 more ▸
26 Ko Butang Satun 30.6°C
27 Ko Lanta 30.6°C
28 Prachuap Khiri Khan 30.6°C
29 Tak Bai 30.6°C
30 Ao Nang 30.6°C
31 Ban Ao Nang 30.6°C
32 Bangtao Beach 30.6°C
33 Ko Phi Phi Don 30.6°C
34 Krabi 30.6°C
35 Mai Khao Beach 30.6°C
36 Nai Yang Beach 30.6°C
37 Phi Phi Islands 30.6°C
38 Railay Beach 30.6°C
39 Bo Phut Beach 30.7°C
40 Chaweng Beach 30.7°C
41 Choeng Mon Beach 30.7°C
42 Koh Phangan 30.7°C
43 Koh Samui 30.7°C
44 Mae Nam Beach 30.7°C
45 Pak Nam Ranong Chang Wat Ranong 30.7°C
46 Chang Ko Phra Thong Phang-nga 30.7°C
47 Lamai Beach 30.7°C
48 Lipa Noi 30.7°C
49 Mae Nam 30.7°C
50 Ban Mai 30.8°C

Warmest 10 in Thailand in May

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

# 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

More on this region