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Coldest sea in Papua New Guinea in September

71 coastal locations in Papua New Guinea ranked by typical September sea temperature, coldest first. Region-wide average in September: 28.3°C.

Coldest in September

Port Moresby

26.1°C September mean in Papua New Guinea

Regional September average

28.3°C

across all 71 coastal locations in Papua New Guinea

Vs annual mean

-0.9°C

below the year-round regional average

What the Papua New Guinea 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.

Papua New Guinea monthly average 28.1°C to 30.0°C
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  • Warmest month January 30.0°C
  • Coldest month August 28.1°C
  • Annual mean 29.2°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 Papua New Guinea month rankings:

Papua New Guinea sea temperature map (live)

The map shows today's latest reading at every Papua New Guinea 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 Papua New Guinea 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 Port Moresby 26.1°C
2 Dedele Point Central Province 26.1°C
3 Kaligola Point Central Province 26.1°C
4 Margarida Central Province 26.1°C
5 Delami Island Milne Bay Province 26.2°C
6 Bonarua (Brumer) Island Milne Bay Province 26.3°C
7 Samarai 26.3°C
8 Baiiri Island Milne Bay Province 26.6°C
9 Daru 26.7°C
10 Mutacomal Reef Western Province 26.7°C
11 Bobo Island Milne Bay Province 26.8°C
12 Merrie England Shoals Western Province 26.8°C
13 Duchateau Islands Milne Bay Province 26.9°C
14 Umuda Island Western Province 27.0°C
15 Kanawea Island Milne Bay Province 27.1°C
16 Goaribari Island Gulf Province 27.1°C
17 Hati Lawi Harbour Milne Bay Province 27.2°C
18 Kumul Tanker Mooring New Ireland Province 27.2°C
19 Uramu Island Gulf Province 27.3°C
20 Port Romilly Gulf Province 27.3°C
21 Milne Bay 27.4°C
22 Kerema 27.5°C
23 Aigura Point Milne Bay Province 27.6°C
24 Alotau (Milne Bay) Milne Bay Province 27.6°C
25 Boia Boia Waga Milne Bay Province 27.6°C
Show 25 more ▸
26 East Cape Milne Bay Province 27.6°C
27 Kegawam Island Milne Bay Province 27.6°C
28 Mapamoiwa Milne Bay Province 27.8°C
29 Cape Deliverance Milne Bay Province 27.9°C
30 Misima Milne Bay Province 27.9°C
31 Tufi Harbour Northern Province 28.1°C
32 Sharp Island Milne Bay Province 28.2°C
33 Finschhafen 28.2°C
34 Bulavai Point Milne Bay Province 28.3°C
35 Kandrian 28.3°C
36 Dregerhafen Morobe Province 28.4°C
37 Wasu Morobe Province 28.5°C
38 Caution Point Northern Province 28.6°C
39 Eve Shoal Northern Province 28.6°C
40 Oro Bay Northern Province 28.6°C
41 Saidor Madang Province 28.6°C
42 Madang (Nagada Harbour) Madang Province 28.8°C
43 Madang 28.8°C
44 Lae Morobe Province 28.9°C
45 Umboi Island Morobe Province 28.9°C
46 Bogia Madang Province 29.2°C
47 Sepik River East Sepik Province 29.3°C
48 Wewak 29.3°C
49 Torokina Bougainville 29.5°C
50 Torakina 29.5°C

Warmest 10 in Papua New Guinea in September

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

# Location September mean
1 Kimbe Bay West New Britain Province 30.0°C
2 Talasea West New Britain Province 30.0°C
3 Kavieng 30.0°C
4 Kimbe 30.0°C
5 Lorengau 29.9°C
6 Tavanatangir Harbour East New Britain Province 29.9°C
7 Eleonora Bay West New Britain Province 29.9°C
8 Lombrum Manus Province 29.9°C
9 Point Stone Island Manus Province 29.9°C
10 Carteret Islands 29.8°C

More on this region