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Warmest sea in Asia in September

3,667 coastal locations in Asia ranked by their typical September sea temperature. Region-wide average in September: 26.6°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

Labuk Bay

30.4°C September mean in Malaysia

Regional September average

26.6°C

across all 3,667 coastal locations in Asia

Vs annual mean

+2.6°C

above the year-round regional average

What the Asia sea feels like in September

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.

Asia monthly average 20.7°C to 27.2°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month August 27.2°C
  • Coldest month February 20.7°C
  • Annual mean 24.0°C
  • Months above 20°C 12 of 12

Where September fits in the year

September sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Asia month rankings:

Asia sea temperature map (live)

The map shows today's latest reading at every Asia location. The list below is based on the typical September 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 Asia locations in September

Sorted by the typical September 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 September mean
1 Labuk Bay Sabah 30.4°C
2 Shortt Island Odisha 30.3°C
3 Digha 30.3°C
4 Mandarmani 30.3°C
5 Hon Ne Thanh Hóa 30.3°C
6 Hon Me Khanh Hoa province 30.2°C
7 Hon Nieu Cua Lo 30.2°C
8 Diamond Harbour 30.2°C
9 Haldia 30.2°C
10 Cua Ba Lat Nam Định Province 30.2°C
11 Cua Cam Approaches (Hon Dau) Hải Phòng 30.1°C
12 Do Son Hải Phòng 30.1°C
13 False Point Odisha 30.1°C
14 Kolkata 30.1°C
15 Thanh Hoa 30.1°C
16 Nambutalai 30.1°C
17 Tondi 30.1°C
18 Kuala Lawas Sarawak 30.1°C
19 Sandakan 30.1°C
20 Sipitang Sabah 30.1°C
21 Weston Sabah 30.1°C
22 Apowan Hải Phòng 30.1°C
23 Hon Gay Quảng Ninh 30.1°C
24 Passe des Hydres Quảng Ninh 30.1°C
25 Port Weld Perak 30.1°C
Show 25 more ▸
26 Sungai Kedah Kedah 30.1°C
27 Pulau Bidan Kedah 30.1°C
28 Cuatro Islas Eastern Visayas 30.1°C
29 Butterworth Wharves Pulau Pinang 30.1°C
30 Labuan (Victoria Harbour) Labuan Federal Territory 30.1°C
31 Lumut Pier Perak 30.1°C
32 Pinang (Georgetown) Pulau Pinang 30.1°C
33 Pulau Rimau Pulau Pinang 30.1°C
34 Tanjung Dawai Kedah 30.1°C
35 Tanjung Ujong Sapoh Daerah Brunei-Muara 30.1°C
36 Paradip Odisha 30.1°C
37 Idi Aceh 30.1°C
38 Teluk Langsa Aceh 30.1°C
39 Alor Setar 30.1°C
40 Pintu Gedong Selangor 30.1°C
41 Pulau Angsa Selangor 30.1°C
42 Pulau Keraman Labuan Federal Territory 30.1°C
43 Sungai Petani 30.1°C
44 Daram Eastern Visayas 30.1°C
45 Doos Eastern Visayas 30.1°C
46 Guindapunan Eastern Visayas 30.1°C
47 Merida Eastern Visayas 30.1°C
48 Puerto Bello Eastern Visayas 30.1°C
49 Santa Fe Eastern Visayas 30.1°C
50 Talalora Eastern Visayas 30.1°C

Coldest 10 in Asia in September

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

# Location September mean
1 Bukhta Teplits Arkhangelskaya -0.7°C
2 Franz Josef Land -0.7°C
3 Pioneer -0.3°C
4 Domashni Island Murmansk 0.4°C
5 Mys Flora Arkhangelsk Oblast 0.8°C
6 Cape Chelyuskin Krasnoyarsk Krai 0.8°C
7 Hansen Island Krasnoyarsk Krai 1.0°C
8 Vrangel 1.8°C
9 Komsomolskoy Pravda Island Krasnoyarsk Krai 1.9°C
10 Rade de Zarya Krasnoyarsk Krai 2.9°C

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