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Coldest sea in South America in March

947 coastal locations in South America ranked by typical March sea temperature, coldest first. Region-wide average in March: 22.4°C.

Coldest in March

Weddell Sea

-1.8°C March mean in Argentina

Regional March average

22.4°C

across all 947 coastal locations in South America

Vs annual mean

+2.0°C

above the year-round regional average

What the South America sea feels like in March

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.

South America monthly average 18.1°C to 22.7°C
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  • Warmest month February 22.7°C
  • Coldest month August 18.1°C
  • Annual mean 20.4°C
  • Months above 20°C 7 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 South America month rankings:

South America sea temperature map (live)

The map shows today's latest reading at every South America location. The list below is based on the typical March 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 South America locations in March

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

# Location March mean
1 Weddell Sea Argentine Antarctica -1.8°C
2 Ronne Ice Shelf Argentine Antarctica -1.8°C
3 Signy Island Argentine Antarctica 0.6°C
4 Scotia Bay Argentine Antarctica 0.6°C
5 Diego Ramirez Magallanes Region 8.1°C
6 Puerto Vancouver Tierra del Fuego Province 8.3°C
7 Port Stanley-A East Falkland 8.3°C
8 Caleta Brent Tierra del Fuego Province 8.4°C
9 Puerto San Juan del Salvamento Tierra del Fuego 8.4°C
10 Isla Observatorio Tierra del Fuego Province 8.5°C
11 Bahia Crossley Tierra del Fuego 8.6°C
12 Isla de los Estados 8.6°C
13 Cape Horn 8.9°C
14 Bahia Buen Suceso Tierra del Fuego 8.9°C
15 Caleta San Martin Magallanes and Chilean Antarctica 9.1°C
16 Bahia Thetis Tierra del Fuego Province 9.2°C
17 Punta Arenas 9.2°C
18 Strait of Magellan 9.2°C
19 Ushuaia 9.2°C
20 Puerto Williams 9.3°C
21 Puerto Toro 9.3°C
22 Bleaker Island East Falkland 9.4°C
23 Bahia Aguirre Tierra del Fuego 9.4°C
24 Adventure Sound East Falkland 9.5°C
25 Fanny Cove Creek East Falkland 9.5°C
Show 25 more ▸
26 North Arm East Falkland 9.5°C
27 Port Stephens West Falkland 9.6°C
28 New Island North West Islands 9.7°C
29 Albemarle West Falkland 9.8°C
30 Fox Bay West Falkland 9.8°C
31 Punta Delgada Magallanes y la Antártica Chilena 9.8°C
32 Puerto Natales 9.9°C
33 Fitzroy Creek East Falkland 9.9°C
34 Argentino Lake 9.9°C
35 El Calafate 9.9°C
36 Viedma Lake 9.9°C
37 Stanley 9.9°C
38 Tierra del Fuego 9.9°C
39 Berkeley Sound Lafonia 10.0°C
40 Port Stanley-B East Falkland 10.0°C
41 Port Salvador Entrance East Falkland 10.1°C
42 Cabo Virgenes Santa Cruz 10.2°C
43 Magellan Strait East Entrance Magallanes Region 10.2°C
44 Punta Dungeness Magallanes y la Antártica Chilena 10.2°C
45 Bahía San Sebastián Tierra del Fuego 10.2°C
46 Punta Catalina Magallanes y la Antártica Chilena 10.2°C
47 Lively Settlement East Falkland 10.2°C
48 Mare Harbour East Falkland 10.2°C
49 Cabo Posesion Magallanes y la Antártica Chilena 10.2°C
50 Saunders Island North West Islands 10.3°C

Warmest 10 in South America in March

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

# Location March mean
1 Areia Branca (Salineiro Terminal) State of Sergipe 29.4°C
2 Cabedelo (Rio Paraiba) Paraíba 29.3°C
3 Cabedelo Paraiba 29.2°C
4 Joao Pessoa Paraiba 29.2°C
5 Areia Branca Rio Grande do Norte 29.1°C
6 Porto de Natal Rio Grande do Norte 29.1°C
7 Canoa Quebrada Ceara 29.1°C
8 Maracajau Rio Grande do Norte 29.1°C
9 Macau Rio Grande do Norte 29.1°C
10 Pipa Rio Grande do Norte 29.1°C

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