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Coldest sea in Australia and Oceania in December

1,649 coastal locations in Australia and Oceania ranked by typical December sea temperature, coldest first. Region-wide average in December: 24.6°C.

Coldest in December

Heard Island

2.7°C December mean in Australia

Regional December average

24.6°C

across all 1,649 coastal locations in Australia and Oceania

Vs annual mean

+1.1°C

above the year-round regional average

What the Australia and Oceania 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 and Oceania monthly average 21.3°C to 25.5°C
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  • 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 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 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 December 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 and Oceania locations in December

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

# Location December mean
1 Heard Island Australian external territory 2.7°C
2 Macquarie Island Tasmania 6.0°C
3 Pis 6.9°C
4 Campbell Island/Motu Ihupuku - Perseverance Harbour New Zealand Outlying Islands 8.7°C
5 Auckland Island - Carnley Harbour Auckland 9.9°C
6 Snares Islands/Tini Heke - North East Island New Zealand Outlying Islands 12.4°C
7 Kaka Point 13.2°C
8 Stewart Island 13.3°C
9 Dunedin 13.4°C
10 Portobello 13.4°C
11 Port Adventure Southland 13.6°C
12 Green Island Otago 13.7°C
13 Easy Harbour Southland 13.8°C
14 Small Craft Retreat Southland 13.8°C
15 Solander Island (Hautere) Southland 13.8°C
16 Port Chalmers Otago 13.8°C
17 Spit Wharf Otago 13.8°C
18 Nugget Point Otago 13.8°C
19 Ruapuke Island Southland 13.9°C
20 Oban Southland 14.0°C
21 Ernest Islands Southland 14.0°C
22 Waikawa Harbour Southland 14.1°C
23 Recherche Bay Tasmania 14.1°C
24 Southport Jetty Tasmania 14.1°C
25 Bramble Cove Tasmania 14.2°C
Show 25 more ▸
26 Maatsuyker Island Tasmania 14.2°C
27 Bluff Southland 14.3°C
28 Dog Island Southland 14.3°C
29 Waipapa Point Southland 14.3°C
30 Chalky Island - Sealers Bay Southland 14.3°C
31 Coal Island - Fishing Bay Southland 14.3°C
32 Jane Coves Southland 14.3°C
33 Welcombe Bay Southland 14.3°C
34 Invercargill 14.4°C
35 New River Entrance Southland 14.4°C
36 Port Craig Southland 14.4°C
37 Yankee River Southland 14.5°C
38 Riverton 14.5°C
39 Waitangi Chatham Islands Territory 14.5°C
40 Kaingaroa Chatham Islands Territory 14.5°C
41 Bruny Island Tasmania 14.6°C
42 Owenga Chatham Islands Territory 14.6°C
43 Pahia 14.6°C
44 Kawakaputa Bay Southland 14.6°C
45 Riverton/Aparima Southland 14.6°C
46 Oamaru Otago 14.7°C
47 Granton Tasmania 14.7°C
48 Kettering Tasmania 14.7°C
49 Margate Tasmania 14.7°C
50 Austins Ferry Tasmania 14.9°C

Warmest 10 in Australia and Oceania in December

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

# 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

More on this region