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Warmest sea in Australia in March

954 coastal locations in Australia ranked by their typical March sea temperature. Region-wide average in March: 25.4°C. The top of the list is where to find the warmest swimming this month.

Warmest in March

Lagrange Bay

31.2°C March mean in Australia

Regional March average

25.4°C

across all 954 coastal locations in Australia

Vs annual mean

+2.5°C

above the year-round regional average

What the Australia sea feels like in March

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid 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 March fits in the year

March 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 March 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 March

Sorted by the typical March 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 March mean
1 Lagrange Bay Western Australia 31.2°C
2 Depuch Island Western Australia 31.2°C
3 Port Hedland Western Australia 31.1°C
4 Valentine Island Western Australia 31.1°C
5 Shale Island Western Australia 31.0°C
6 Gulf of Carpentaria Northern Territory 30.9°C
7 Cape Domett Western Australia 30.9°C
8 Adolphus Island Western Australia 30.9°C
9 Quoin Island Northern Territory 30.9°C
10 Pelican Island Western Australia 30.8°C
11 Port Usborne Western Australia 30.8°C
12 Lacrosse Island Western Australia 30.8°C
13 West Island Northern Territory 30.8°C
14 Cape Boileau Western Australia 30.8°C
15 Lizard Island Western Australia 30.8°C
16 Port Walcott (Cape Lambert) Western Australia 30.8°C
17 Australia Queensland 30.7°C
18 Catfish Island Northern Territory 30.7°C
19 Albert River Mouth Queensland 30.7°C
20 Centre Island Northern Territory 30.7°C
21 Bedout Island Western Australia 30.7°C
22 Dampier (King Bay) Western Australia 30.7°C
23 Sweers Island Queensland 30.7°C
24 West Wellesley Islands Queensland 30.7°C
25 Withnell Bay Western Australia 30.7°C
Show 25 more ▸
26 Alyangula Northern Territory 30.6°C
27 Broome Western Australia 30.6°C
28 Cable Beach Western Australia 30.6°C
29 Large Island Western Australia 30.6°C
30 Jones Point Northern Territory 30.6°C
31 Mornington Island Queensland 30.6°C
32 Milner Bay (Groote Eylandt) Northern Territory 30.6°C
33 Hall Point Western Australia 30.6°C
34 Cape Baskerville Western Australia 30.6°C
35 Red Bluff Western Australia 30.6°C
36 Port Keats Northern Territory 30.6°C
37 Yampi Sound (Koolan Island) Western Australia 30.6°C
38 Anson Bay Northern Territory 30.5°C
39 Bountiful Island Queensland 30.5°C
40 Cape Ford Northern Territory 30.5°C
41 Karrakatta Bay Western Australia 30.5°C
42 Sunday Island Western Australia 30.5°C
43 Hawk Island Northern Territory 30.5°C
44 Cape Beatrice Northern Territory 30.5°C
45 Cape Scott Offshore Northern Territory 30.5°C
46 Bedford Islands Western Australia 30.5°C
47 Cape Grey Northern Territory 30.4°C
48 Macleay Island Western Australia 30.4°C
49 Port Langdon Northern Territory 30.4°C
50 Nassau River Offshore Queensland 30.4°C

Coldest 10 in Australia in March

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

# Location March mean
1 Heard Island Australian external territory 3.7°C
2 Macquarie Island Tasmania 6.9°C
3 Bramble Cove Tasmania 16.3°C
4 Maatsuyker Island Tasmania 16.3°C
5 Recherche Bay Tasmania 16.4°C
6 Southport Jetty Tasmania 16.4°C
7 Cape Rabelais (Offshore) South Australia 16.4°C
8 Cape Jaffa South Australia 16.5°C
9 Beachport South Australia 16.5°C
10 Kingston South Australia 16.6°C

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