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Coldest sea in Indonesia in September

594 coastal locations in Indonesia ranked by typical September sea temperature, coldest first. Region-wide average in September: 28.4°C.

Coldest in September

Taman

17.9°C September mean in Indonesia

Regional September average

28.4°C

across all 594 coastal locations in Indonesia

Vs annual mean

-0.5°C

below the year-round regional average

What the Indonesia 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.

Indonesia monthly average 28.2°C to 29.5°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month April 29.5°C
  • Coldest month August 28.2°C
  • Annual mean 28.9°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 Indonesia month rankings:

Indonesia sea temperature map (live)

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

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

# Location September mean
1 Taman 17.9°C
2 Lantera 18.3°C
3 Tembol 18.3°C
4 Batawa 20.3°C
5 Karara 20.6°C
6 Pandan 22.1°C
7 Fontein 24.6°C
8 Bator 24.7°C
9 Prigi Jawa Timur 25.4°C
10 Tjilauteurem Jawa Barat 25.5°C
11 Karangsari 25.5°C
12 Ketawang 25.6°C
13 Tawangrejo 25.6°C
14 Tugu 25.6°C
15 Banyudono 25.6°C
16 Karanganyar 25.6°C
17 Karangdowo 25.6°C
18 Kuncen 25.6°C
19 Karangrejo 25.7°C
20 Banjarjo 25.7°C
21 Kauman 25.7°C
22 Pandeyan 25.7°C
23 Tegalrejo 25.7°C
24 Temana 25.7°C
25 Yogyakarta 25.7°C
Show 25 more ▸
26 Ciparay 25.8°C
27 Cibenda 25.9°C
28 Cilacap (Tjilatjap) Jawa Tengah 26.0°C
29 Alasmalang 26.1°C
30 Muncar 26.1°C
31 Pendok 26.2°C
32 Cipari 26.3°C
33 Congkar 26.3°C
34 Genteng (Westbaai) Jawa Barat 26.3°C
35 Banjar 26.3°C
36 Bola 26.3°C
37 Karangbenda 26.3°C
38 Karangjaladri 26.3°C
39 Pananjung 26.3°C
40 Banyuwangi Jawa Timur 26.5°C
41 Kalapagenep 26.5°C
42 Pulau Tabuan Lampung 26.5°C
43 Banjar Anyar 26.5°C
44 Canggu 26.5°C
45 Denpasar 26.5°C
46 Kuta 26.5°C
47 Legian 26.5°C
48 Seminyak 26.5°C
49 Gilimanuk 26.6°C
50 Karangpapak 26.6°C

Warmest 10 in Indonesia in September

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

# Location September mean
1 Idi Aceh 30.1°C
2 Teluk Langsa Aceh 30.1°C
3 Kwatisore Papua 30.1°C
4 Medan 30.0°C
5 Percut 30.0°C
6 Nabire Papua 30.0°C
7 Pulau-Pulau Moor Papua 30.0°C
8 Pelabuhan Kualatanjung Sumatera Utara 30.0°C
9 Pulau Jemur Riau 30.0°C
10 Tanjungtiram Sumatra Utara 30.0°C

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