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Warmest sea in South America in December

947 coastal locations in South America ranked by their typical December sea temperature. Region-wide average in December: 21.4°C. The top of the list is where to find the warmest swimming this month.

Warmest in December

Macapa

29.7°C December mean in Brazil

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, 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 South America locations in December

Sorted by the typical December 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 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
11 Oeiras do Para Para 29.1°C
12 Belem Para 29.1°C
13 Baru Island 29.1°C
14 Porto de Mosqueiro Pará 29.1°C
15 Rosario Islands 29.1°C
16 Ananindeua Para 29.0°C
17 Necocli 28.9°C
18 Ilha De Colares Pará 28.8°C
19 Ilha dos Guaras State of Pará 28.8°C
20 Soure Para 28.8°C
21 Turbo 28.8°C
22 Marapanim Para 28.8°C
23 Acandi 28.8°C
24 Capurgana 28.8°C
25 Salinopolis Para 28.8°C
Show 25 more ▸
26 Sao Caetano de Odivelas Para 28.8°C
27 Vigia Para 28.8°C
28 Sao Joao de Pirabas Para 28.8°C
29 Cocal State of Amapá 28.8°C
30 Augusto Correa Para 28.7°C
31 Ilha de Santana State of Maranhão 28.5°C
32 Mountain San Andres and Providencia 28.5°C
33 Alcantara Maranhao 28.5°C
34 Itaqui Maranhão 28.4°C
35 Ponta da Madeira Maranhão 28.4°C
36 Sao Jose de Ribamar Maranhao 28.4°C
37 Sao Luis Maranhao 28.4°C
38 Luis Correla Piauí 28.4°C
39 Bahia el Tablazo Zulia 28.4°C
40 El Toro Zulia 28.4°C
41 Punta de Palmas Zulia 28.4°C
42 San Andres 28.4°C
43 Providencia island 28.3°C
44 Cartagena 28.3°C
45 La Boquilla 28.3°C
46 Acaraú Ceará 28.3°C
47 Areia Branca (Salineiro Terminal) State of Sergipe 28.3°C
48 Camocim Ceara 28.3°C
49 Jijoca de Jericoacoara Ceara 28.3°C
50 Cabedelo (Rio Paraiba) Paraíba 28.3°C

Coldest 10 in South America in December

Same data the other way. Helpful if you want to know which South America coasts to avoid for swimming in December.

# 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

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