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Warmest sea in Australia in September

954 coastal locations in Australia ranked by their typical September sea temperature. Region-wide average in September: 20.6°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

Burge Point

28.5°C September mean in Australia

Regional September average

20.6°C

across all 954 coastal locations in Australia

Vs annual mean

-2.3°C

below the year-round regional average

What the Australia 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 monthly average 20.0°C to 25.5°C
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  • Warmest month February 25.5°C
  • Coldest month August 20.0°C
  • Annual mean 22.9°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 Australia month rankings:

Australia sea temperature map (live)

The map shows today's latest reading at every Australia 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 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 Burge Point Northern Territory 28.5°C
2 Native Point Northern Territory 28.5°C
3 Newby Shoal Northern Territory 28.4°C
4 Tapa Bay Northern Territory 28.3°C
5 Point Jenny Northern Territory 28.3°C
6 Fish Reef Northern Territory 28.3°C
7 Jabiru Northern Territory 28.3°C
8 Darwin Northern Territory 28.3°C
9 Fannie Bay Northern Territory 28.3°C
10 Larrakeyah Northern Territory 28.3°C
11 Nightcliff Northern Territory 28.3°C
12 Parap Northern Territory 28.3°C
13 Stuart Park Northern Territory 28.3°C
14 The Boxers Northern Territory 28.2°C
15 Glyde Point Northern Territory 28.2°C
16 Cape Hotham Northern Territory 28.2°C
17 Pee Shoal Western Australia 28.2°C
18 Hancox Shoal Area Northern Territory 28.2°C
19 Dillon Shoal Western Australia 28.2°C
20 Skua No. 4 Well Western Australia 28.1°C
21 Heywood Shoal Western Australia 28.1°C
22 Parsons Bank Northern Territory 28.1°C
23 Anson Bay Northern Territory 28.1°C
24 Beagle A Northern Territory 28.1°C
25 Calder Shoal Northern Territory 28.1°C
Show 25 more ▸
26 Chambers Bay Northern Territory 28.1°C
27 Point Stuart Northern Territory 28.1°C
28 Point Fawcett (Offshore) Northern Territory 28.0°C
29 Unnamed Shoal Northern Territory 28.0°C
30 Peron Island North Northern Territory 28.0°C
31 Browse Island Western Australia 28.0°C
32 Medina Inlet South Northern Territory 28.0°C
33 Van Cloon Shoal Western Australia 28.0°C
34 Cape Ford Northern Territory 28.0°C
35 Munkunuwa Northern Territory 28.0°C
36 Ashmore Reef Queensland 28.0°C
37 Maret Island Western Australia 28.0°C
38 Scott Reef (Wa) Western Australia 27.9°C
39 Camp Point Northern Territory 27.9°C
40 East Field Island Northern Territory 27.9°C
41 West Alligator Head Northern Territory 27.9°C
42 Cape Scott Offshore Northern Territory 27.9°C
43 Echo Shoal Western Australia 27.9°C
44 Port Warrender Western Australia 27.9°C
45 Baudin Island Western Australia 27.8°C
46 Cache Point Northern Territory 27.8°C
47 Cape Van Dieman Northern Territory 27.8°C
48 Cape Voltaire (Krait Bay) Western Australia 27.8°C
49 St. Asaph Bay Northern Territory 27.8°C
50 White Island Western Australia 27.8°C

Coldest 10 in Australia in September

Same data the other way. Helpful if you want to know which Australia 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 Austins Ferry Tasmania 11.9°C
4 Bellerive Tasmania 11.9°C
5 Berriedale Tasmania 11.9°C
6 Blackmans Bay Tasmania 11.9°C
7 Bridgewater Tasmania 11.9°C
8 Glenorchy Tasmania 11.9°C
9 Goodwood Tasmania 11.9°C
10 Hobart Tasmania 11.9°C

More on this region