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Warmest sea in Indonesia in August

594 coastal locations in Indonesia ranked by their typical August sea temperature. Region-wide average in August: 28.2°C. The top of the list is where to find the warmest swimming this month.

Warmest in August

Medan

30.3°C August mean in Indonesia

Regional August average

28.2°C

across all 594 coastal locations in Indonesia

Vs annual mean

-0.7°C

below the year-round regional average

What the Indonesia 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.

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 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 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 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 Indonesia 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 Medan 30.3°C
2 Percut 30.3°C
3 Belawan 30.3°C
4 Teluk Langsa Aceh 30.3°C
5 Idi Aceh 30.3°C
6 Pelabuhan Kualatanjung Sumatera Utara 30.2°C
7 Dumai 30.1°C
8 Tanjungtiram Sumatra Utara 30.1°C
9 Teluk Nibung 30.1°C
10 Tanjung Medang Riau 30.1°C
11 Tanjung Sinaboi Kepulauan Riau 30.1°C
12 Lancang 30.1°C
13 Lhokseumawe 30.1°C
14 Barus Sumatra Utara 30.0°C
15 Natal Sumatera Utara 30.0°C
16 Pulau Jemur Riau 30.0°C
17 Sigli Aceh 30.0°C
18 Sungai Paloh Kalimantan Barat 30.0°C
19 Tanjung Parit Riau 30.0°C
20 Sibolga 30.0°C
21 Paloh 29.9°C
22 Singkel Aceh 29.9°C
23 Gunungsitoli Sumatera Utara 29.9°C
24 Kwatisore Papua 29.9°C
25 Muara Kassei Kalimantan Timur 29.9°C
Show 25 more ▸
26 Tanjung Birai East Kalimantan 29.9°C
27 Teluk Dalam Sumatera Utara 29.9°C
28 Nabire Papua 29.9°C
29 Pulau-Pulau Moor Papua 29.9°C
30 Pulau Telo North Sumatra 29.9°C
31 Simanari Sumatra Utara 29.9°C
32 Teluk Togian Sulawesi Tengah 29.9°C
33 Tobelombangi Sulawesi Tengah 29.9°C
34 Seroei Papua 29.8°C
35 Malu Kepulauan Riau 29.8°C
36 Donggala Sulawesi Tengah 29.8°C
37 Pelabuhan Serasan Kepulauan Riau 29.8°C
38 Bwool Sulawesi Tengah 29.8°C
39 Pemangkat Kalimantan Barat 29.8°C
40 Pulau Subi Kecil Kepulauan Riau 29.8°C
41 Tapaktuan Aceh 29.8°C
42 Teluk Sinabang Aceh 29.8°C
43 Poso Sulawesi Tengah 29.8°C
44 Pulau Kepalajerih Kepulauan Riau 29.8°C
45 Pulau Sambu Kepulauan Riau 29.8°C
46 Sekupang Kepulauan Riau 29.8°C
47 Sulawesi 29.8°C
48 Iyu Kecil (Brothers Light) Kepulauan Riau 29.8°C
49 Palu 29.8°C
50 Bokat 29.7°C

Coldest 10 in Indonesia in August

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

# Location August mean
1 Taman 19.3°C
2 Lantera 19.5°C
3 Tembol 19.5°C
4 Karara 20.9°C
5 Batawa 22.5°C
6 Pandan 23.6°C
7 Karangsari 25.2°C
8 Ketawang 25.2°C
9 Prigi Jawa Timur 25.2°C
10 Banyudono 25.2°C

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