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Coldest sea in South America in December

947 coastal locations in South America ranked by typical December sea temperature, coldest first. Region-wide average in December: 21.4°C.

Coldest in December

Weddell Sea

-1.8°C December mean in Argentina

Regional December average

21.4°C

across all 947 coastal locations in South America

Vs annual mean

+1.0°C

above the year-round regional average

What the South America 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.

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 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 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 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 South America 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 Weddell Sea Argentine Antarctica -1.8°C
2 Ronne Ice Shelf Argentine Antarctica -1.8°C
3 Scotia Bay Argentine Antarctica -0.5°C
4 Signy Island Argentine Antarctica -0.4°C
5 Diego Ramirez Magallanes Region 6.6°C
6 Puerto Vancouver Tierra del Fuego Province 7.2°C
7 Caleta Brent Tierra del Fuego Province 7.3°C
8 Puerto San Juan del Salvamento Tierra del Fuego 7.4°C
9 Cape Horn 7.4°C
10 Bahia Crossley Tierra del Fuego 7.4°C
11 Isla Observatorio Tierra del Fuego Province 7.5°C
12 Isla de los Estados 7.6°C
13 Bahia Buen Suceso Tierra del Fuego 7.8°C
14 Caleta San Martin Magallanes and Chilean Antarctica 7.8°C
15 Port Stanley-A East Falkland 7.9°C
16 Bahia Thetis Tierra del Fuego Province 8.0°C
17 Ushuaia 8.2°C
18 Bahia Aguirre Tierra del Fuego 8.3°C
19 Puerto Williams 8.3°C
20 Puerto Toro 8.3°C
21 Punta Arenas 8.5°C
22 Strait of Magellan 8.5°C
23 Tierra del Fuego 8.7°C
24 Bleaker Island East Falkland 8.7°C
25 Rio Grande 8.8°C
Show 25 more ▸
26 Adventure Sound East Falkland 8.8°C
27 Fanny Cove Creek East Falkland 8.8°C
28 North Arm East Falkland 8.8°C
29 Berkeley Sound Lafonia 8.8°C
30 Port Stanley-B East Falkland 8.8°C
31 Stanley 8.9°C
32 Port Stephens West Falkland 9.0°C
33 Puerto Natales 9.0°C
34 Cabo Virgenes Santa Cruz 9.0°C
35 Magellan Strait East Entrance Magallanes Region 9.0°C
36 Punta Dungeness Magallanes y la Antártica Chilena 9.0°C
37 Port Salvador Entrance East Falkland 9.1°C
38 Fox Bay West Falkland 9.1°C
39 Albemarle West Falkland 9.1°C
40 Caleta la Mision Tierra del Fuego 9.1°C
41 New Island North West Islands 9.1°C
42 Fitzroy Creek East Falkland 9.1°C
43 Golding Island North West Islands 9.3°C
44 Pebble Island North West Islands 9.3°C
45 Punta Catalina Magallanes y la Antártica Chilena 9.3°C
46 Keppel Sound West Falkland 9.4°C
47 Saunders Island North West Islands 9.4°C
48 Lively Settlement East Falkland 9.4°C
49 Mare Harbour East Falkland 9.4°C
50 Westpoint Island North West Islands 9.4°C

Warmest 10 in South America in December

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

# Location December mean
1 Macapa Amapa 29.7°C
2 Santana Amapa 29.7°C
3 Covenas 29.7°C
4 Tolu 29.6°C
5 Ilha Do Brigue State of Amapá 29.4°C
6 Tintipan Island 29.3°C
7 Arboletes 29.2°C
8 Barcarena Para 29.1°C
9 Cameta Para 29.1°C
10 Limoeiro do Ajuru Para 29.1°C

More on this region