Skip to content
seatemperatures.net

Warmest sea in Australia in December

954 coastal locations in Australia ranked by their typical December sea temperature. Region-wide average in December: 24.4°C. The top of the list is where to find the warmest swimming this month.

Warmest in December

Gulf of Carpentaria

31.5°C December mean in Australia

Regional December average

24.4°C

across all 954 coastal locations in Australia

Vs annual mean

+1.5°C

above the year-round regional average

What the Australia sea feels like in December

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
J
F
M
A
M
J
J
A
S
O
N
D
  • 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 December fits in the year

December 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 December 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 December

Sorted by the typical December 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 December mean
1 Gulf of Carpentaria Northern Territory 31.5°C
2 Cape Domett Western Australia 31.5°C
3 Quoin Island Northern Territory 31.5°C
4 West Island Northern Territory 31.5°C
5 Adolphus Island Western Australia 31.4°C
6 Shale Island Western Australia 31.4°C
7 Pelican Island Western Australia 31.4°C
8 Lacrosse Island Western Australia 31.3°C
9 Catfish Island Northern Territory 31.3°C
10 Anson Bay Northern Territory 31.3°C
11 Centre Island Northern Territory 31.3°C
12 Port Keats Northern Territory 31.3°C
13 Albert River Mouth Queensland 31.3°C
14 Jones Point Northern Territory 31.3°C
15 Cape Ford Northern Territory 31.2°C
16 West Wellesley Islands Queensland 31.2°C
17 Burge Point Northern Territory 31.2°C
18 Entrance Island Northern Territory 31.2°C
19 East Field Island Northern Territory 31.2°C
20 Native Point Northern Territory 31.2°C
21 Point Jenny Northern Territory 31.2°C
22 West Alligator Head Northern Territory 31.2°C
23 Hutchison River Northern Territory 31.2°C
24 Chambers Bay Northern Territory 31.1°C
25 Point Stuart Northern Territory 31.1°C
Show 25 more ▸
26 Port Warrender Western Australia 31.1°C
27 Peron Island North Northern Territory 31.1°C
28 Cape Scott Offshore Northern Territory 31.1°C
29 Cape Hotham Northern Territory 31.1°C
30 Tapa Bay Northern Territory 31.1°C
31 Lizard Island Western Australia 31.1°C
32 Mornington Island Queensland 31.1°C
33 Yabooma Island Northern Territory 31.1°C
34 Fish Reef Northern Territory 31.0°C
35 Glyde Point Northern Territory 31.0°C
36 Jar Island Western Australia 31.0°C
37 Australia Queensland 31.0°C
38 Sweers Island Queensland 31.0°C
39 Valentine Island Western Australia 31.0°C
40 Darwin Northern Territory 31.0°C
41 Fannie Bay Northern Territory 31.0°C
42 Larrakeyah Northern Territory 31.0°C
43 Nightcliff Northern Territory 31.0°C
44 Parap Northern Territory 31.0°C
45 Stuart Park Northern Territory 31.0°C
46 Hancox Shoal Area Northern Territory 31.0°C
47 Two Hills Bay Northern Territory 30.9°C
48 Cadell Strait Northern Territory 30.9°C
49 Elcho Island Northern Territory 30.9°C
50 Milner Bay (Groote Eylandt) Northern Territory 30.9°C

Coldest 10 in Australia in December

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

# Location December mean
1 Heard Island Australian external territory 2.7°C
2 Macquarie Island Tasmania 6.0°C
3 Recherche Bay Tasmania 14.1°C
4 Southport Jetty Tasmania 14.1°C
5 Bramble Cove Tasmania 14.2°C
6 Maatsuyker Island Tasmania 14.2°C
7 Bruny Island Tasmania 14.6°C
8 Granton Tasmania 14.7°C
9 Kettering Tasmania 14.7°C
10 Margate Tasmania 14.7°C

More on this region