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Coldest sea in Australia in August

954 coastal locations in Australia ranked by typical August sea temperature, coldest first. Region-wide average in August: 20.0°C.

Coldest in August

Heard Island

1.9°C August mean in Australia

Regional August average

20.0°C

across all 954 coastal locations in Australia

Vs annual mean

-2.9°C

below the year-round regional average

What the Australia sea feels like in August

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 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 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 August 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 Australia locations in August

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

# Location August mean
1 Heard Island Australian external territory 1.9°C
2 Macquarie Island Tasmania 4.6°C
3 Balnarring Victoria 11.1°C
4 Black Rock Victoria 11.1°C
5 Cowes Victoria 11.1°C
6 Flinders Victoria 11.1°C
7 Hampton Victoria 11.1°C
8 Mordialloc Victoria 11.1°C
9 Mount Martha Victoria 11.1°C
10 Parkdale Victoria 11.1°C
11 Phillip Island Victoria 11.1°C
12 Point Leo Victoria 11.1°C
13 Western Port Bay Victoria 11.1°C
14 Port Phillip Bay Victoria 11.2°C
15 Bouchier Channel Victoria 11.2°C
16 Flinders Jetty Victoria 11.2°C
17 Sandringham Victoria 11.2°C
18 Tooradin Victoria 11.2°C
19 Western Port (Sandy Point) Victoria 11.2°C
20 Western Port (Stony Point) Victoria 11.2°C
21 Melbourne (Williamstown) Victoria 11.3°C
22 Werribee Victoria 11.3°C
23 Altona Victoria 11.4°C
24 Blairgowrie Victoria 11.4°C
25 Dromana Victoria 11.4°C
Show 25 more ▸
26 Elwood Victoria 11.4°C
27 Frankston Victoria 11.4°C
28 Melbourne Victoria 11.4°C
29 Mornington Victoria 11.4°C
30 Port Melbourne Victoria 11.4°C
31 Rosebud Victoria 11.4°C
32 Rye Victoria 11.4°C
33 St Kilda beach Victoria 11.4°C
34 St Kilda Victoria 11.4°C
35 Williamstown Victoria 11.4°C
36 West Channel Pile Victoria 11.5°C
37 Austins Ferry Tasmania 12.2°C
38 Bellerive Tasmania 12.2°C
39 Berriedale Tasmania 12.2°C
40 Blackmans Bay Tasmania 12.2°C
41 Bridgewater Tasmania 12.2°C
42 Glenorchy Tasmania 12.2°C
43 Goodwood Tasmania 12.2°C
44 Hobart Tasmania 12.2°C
45 Howrah Tasmania 12.2°C
46 Kingston Tasmania 12.2°C
47 Lauderdale Tasmania 12.2°C
48 Lindisfarne Tasmania 12.2°C
49 Lutana Tasmania 12.2°C
50 Old Beach Tasmania 12.2°C

Warmest 10 in Australia in August

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

# Location August mean
1 The Boxers Northern Territory 27.5°C
2 Dillon Shoal Western Australia 27.5°C
3 Newby Shoal Northern Territory 27.4°C
4 Unnamed Shoal Northern Territory 27.4°C
5 Jabiru Northern Territory 27.3°C
6 Pee Shoal Western Australia 27.3°C
7 Calder Shoal Northern Territory 27.3°C
8 Echo Shoal Western Australia 27.3°C
9 Point Fawcett (Offshore) Northern Territory 27.2°C
10 Ashmore Reef Queensland 27.1°C

More on this region