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Coldest sea in Australia and Oceania in April

1,649 coastal locations in Australia and Oceania ranked by typical April sea temperature, coldest first. Region-wide average in April: 24.7°C.

Coldest in April

Heard Island

3.6°C April mean in Australia

Regional April average

24.7°C

across all 1,649 coastal locations in Australia and Oceania

Vs annual mean

+1.2°C

above the year-round regional average

What the Australia and Oceania sea feels like in April

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 April fits in the year

April 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 April 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 April

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

# Location April mean
1 Heard Island Australian external territory 3.6°C
2 Macquarie Island Tasmania 6.3°C
3 Campbell Island/Motu Ihupuku - Perseverance Harbour New Zealand Outlying Islands 9.1°C
4 Auckland Island - Carnley Harbour Auckland 10.5°C
5 Pis 12.4°C
6 Kaka Point 13.1°C
7 Dunedin 13.2°C
8 Portobello 13.2°C
9 Snares Islands/Tini Heke - North East Island New Zealand Outlying Islands 13.4°C
10 Stewart Island 13.6°C
11 Green Island Otago 13.6°C
12 Port Chalmers Otago 13.7°C
13 Spit Wharf Otago 13.7°C
14 Nugget Point Otago 13.8°C
15 Port Adventure Southland 13.9°C
16 Ruapuke Island Southland 14.0°C
17 Waikawa Harbour Southland 14.0°C
18 Oamaru Otago 14.2°C
19 Waipapa Point Southland 14.2°C
20 Oban Southland 14.2°C
21 Invercargill 14.3°C
22 Bluff Southland 14.3°C
23 Dog Island Southland 14.3°C
24 Easy Harbour Southland 14.4°C
25 Small Craft Retreat Southland 14.4°C
Show 25 more ▸
26 Riverton 14.4°C
27 New River Entrance Southland 14.5°C
28 Riverton/Aparima Southland 14.6°C
29 Ernest Islands Southland 14.6°C
30 Yankee River Southland 14.7°C
31 Pahia 14.7°C
32 Kaikoura 14.7°C
33 Kawakaputa Bay Southland 14.7°C
34 Timaru 14.8°C
35 Solander Island (Hautere) Southland 14.8°C
36 Port Craig Southland 14.8°C
37 Christchurch 14.9°C
38 French Bay Canterbury 14.9°C
39 Lyttelton 14.9°C
40 Tikao Bay Canterbury 14.9°C
41 Akaroa 15.0°C
42 Sumner 15.0°C
43 Cape Campbell Marlborough 15.1°C
44 Kaingaroa Chatham Islands Territory 15.2°C
45 Waitangi Chatham Islands Territory 15.2°C
46 Owenga Chatham Islands Territory 15.2°C
47 Chalky Island - Sealers Bay Southland 15.3°C
48 Coal Island - Fishing Bay Southland 15.3°C
49 Jane Coves Southland 15.3°C
50 Welcombe Bay Southland 15.3°C

Warmest 10 in Australia and Oceania in April

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

# Location April mean
1 Shale Island Western Australia 30.7°C
2 Lizard Island Western Australia 30.6°C
3 Hall Point Western Australia 30.4°C
4 Yampi Sound (Koolan Island) Western Australia 30.4°C
5 Jones Point Northern Territory 30.4°C
6 Port Keats Northern Territory 30.4°C
7 Catfish Island Northern Territory 30.3°C
8 Bedford Islands Western Australia 30.3°C
9 Cape Scott Offshore Northern Territory 30.3°C
10 Macleay Island Western Australia 30.3°C

More on this region