Where is the sea warmest in South America in December?
In December the warmest sea in South America is at Santiago de Tolú, Colombia, at 29.8°C. 95 of 125 cities measured are comfortable this month.
| # | City | Country | Sea | Swimming |
|---|---|---|---|---|
| 1 | Santiago de Tolú | Colombia | 29.8°C | Bath-like |
| 2 | Macapá | Brazil | 29.7°C | Bath-like |
| 3 | Belém | Brazil | 29.2°C | Bath-like |
| 4 | Turbaná | Colombia | 29.1°C | Bath-like |
| 5 | Cartagena | Colombia | 29.1°C | Bath-like |
| 6 | San Juan de Urabá | Colombia | 29.1°C | Bath-like |
| 7 | Necoclí | Colombia | 29.0°C | Bath-like |
| 8 | Turbo | Colombia | 29.0°C | Bath-like |
| 9 | São Luís | Brazil | 28.4°C | Bath-like |
| 10 | San Andrés | Colombia | 28.4°C | Bath-like |
| 11 | Los Puertos de Altagracia | Venezuela | 28.4°C | Bath-like |
| 12 | Santa Cruz de Mara | Venezuela | 28.4°C | Bath-like |
| 13 | San Rafael | Venezuela | 28.4°C | Bath-like |
| 14 | Fortaleza | Brazil | 28.2°C | Bath-like |
| 15 | Anna Regina | Guyana | 28.2°C | Bath-like |
| 16 | Tuschen | Guyana | 28.2°C | Bath-like |
| 17 | Georgetown | Guyana | 28.2°C | Bath-like |
| 18 | Ciénaga | Colombia | 28.2°C | Bath-like |
| 19 | Natal | Brazil | 28.2°C | Bath-like |
| 20 | Recife | Brazil | 28.0°C | Bath-like |
| 21 | New Amsterdam | Guyana | 28.0°C | Bath-like |
| 22 | Rose Hall | Guyana | 28.0°C | Bath-like |
| 23 | Güiria | Venezuela | 28.0°C | Bath-like |
| 24 | Corriverton | Guyana | 28.0°C | Bath-like |
| 25 | Kourou | French Guiana | 27.9°C | Bath-like |
Ranked on the NOAA OISST monthly climatology — a long-run average for December, not a forecast. A given December will run warmer or cooler than this, and the sea is warmest late in the afternoon and late in the season.