Skip to content
seatemperatures.net

Warmest sea in Australia and Oceania in September

1,649 coastal locations in Australia and Oceania ranked by their typical September sea temperature. Region-wide average in September: 21.6°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

Nukuoro

30.1°C September mean in Micronesia

Regional September average

21.6°C

across all 1,649 coastal locations in Australia and Oceania

Vs annual mean

-1.8°C

below the year-round regional average

What the Australia and Oceania sea feels like in September

Water at this temperature is very pleasant to swim in. If you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

Australia and Oceania monthly average 21.3°C to 25.5°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month February 25.5°C
  • Coldest month August 21.3°C
  • Annual mean 23.5°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 Australia and Oceania month rankings:

Australia and Oceania sea temperature map (live)

The map shows today's latest reading at every Australia and Oceania 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 Australia and Oceania 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 Nukuoro 30.1°C
2 Kuttu 30.1°C
3 Lukunor 30.1°C
4 Oneop 30.1°C
5 Satawan 30.1°C
6 Ta 30.1°C
7 Moro Tu Chuuk 30.1°C
8 Satawan Anchorage, Nomoi Islands, Chuuk, FSM Chuuk 30.1°C
9 Namoluk Atoll, Chuuk, FSM Chuuk 30.1°C
10 Kolonia 30.1°C
11 Lelu 30.1°C
12 Malem 30.1°C
13 Namoluk 30.1°C
14 Pingelap 30.1°C
15 Tofol 30.1°C
16 Kosrae 30.1°C
17 Tafunsak 30.1°C
18 Utwe 30.1°C
19 Kapingamarangi 30.1°C
20 Madolenihmw 30.1°C
21 Pohnpei 30.1°C
22 Kosrae Island Kosrae 30.1°C
23 Oroluk Island Pohnpei 30.0°C
24 Pohnpei Pohnpei 30.0°C
25 Losap Atoll, Chuuk, FSM Chuuk 30.0°C
Show 25 more ▸
26 Losap 30.0°C
27 Nema 30.0°C
28 Chuuk Lagoon 30.0°C
29 Faichuk islands 30.0°C
30 Lamotrek Yap 30.0°C
31 Poluwat 30.0°C
32 Pulap 30.0°C
33 Puluwat Island Chuuk 30.0°C
34 Tamatam 30.0°C
35 Kili 30.0°C
36 Namdrik 30.0°C
37 Chuuk, Moen Island, E. Caroline Islands, FSM (sub) Chuuk 30.0°C
38 Chuuk, Moen Island, E. Caroline Islands, FSM Chuuk 30.0°C
39 Dublon Island, Chuuk, FSM Chuuk 30.0°C
40 Pulap Atoll, Chuuk, FSM Chuuk 30.0°C
41 Woleai Island Yap 30.0°C
42 Ebon 30.0°C
43 Ifalik Atoll, Caroline Islands, FSM Yap 30.0°C
44 Namonuito Atoll, Caroline Islands, FSM Chuuk 30.0°C
45 Namonuito Islands Chuuk 30.0°C
46 Weno Town 30.0°C
47 Pagan Island, Marianas Northern Islands 30.0°C
48 Kimbe Bay West New Britain Province 30.0°C
49 Talasea West New Britain Province 30.0°C
50 Moch 30.0°C

Coldest 10 in Australia and Oceania in September

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

# Location September mean
1 Heard Island Australian external territory 1.5°C
2 Macquarie Island Tasmania 4.6°C
3 Campbell Island/Motu Ihupuku - Perseverance Harbour New Zealand Outlying Islands 7.4°C
4 Auckland Island - Carnley Harbour Auckland 8.6°C
5 Dunedin 10.4°C
6 Portobello 10.4°C
7 Timaru 10.4°C
8 Sumner 10.5°C
9 Kaka Point 10.5°C
10 Akaroa 10.5°C

More on this region