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Warmest sea in South America in September

947 coastal locations in South America ranked by their typical September sea temperature. Region-wide average in September: 18.6°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

Bahia el Tablazo

30.5°C September mean in Venezuela

Regional September average

18.6°C

across all 947 coastal locations in South America

Vs annual mean

-1.8°C

below the year-round regional average

What the South America sea feels like in September

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

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 September fits in the year

September 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 September 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 September

Sorted by the typical September 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 September mean
1 Bahia el Tablazo Zulia 30.5°C
2 El Toro Zulia 30.5°C
3 Punta de Palmas Zulia 30.5°C
4 Malecon Zulia 30.4°C
5 Covenas 30.3°C
6 Tolu 30.3°C
7 Cabimas 30.3°C
8 El Toro 30.3°C
9 Maracaibo 30.3°C
10 Tia Juana 30.3°C
11 Baru Island 30.1°C
12 Tintipan Island 30.1°C
13 Cartagena 29.9°C
14 La Boquilla 29.9°C
15 Rosario Islands 29.9°C
16 Ilha Do Brigue State of Amapá 29.9°C
17 Demarara Light Buoy Demerara-Mahaica 29.9°C
18 Punta Waini Barima-Waini 29.9°C
19 Charity Pomeroon-Supenaam 29.8°C
20 Puerto de Hierro Sucre 29.8°C
21 Belfield Demerara-Mahaica 29.8°C
22 Linden Upper Demerara-Berbice 29.8°C
23 Macapa Amapa 29.8°C
24 Santana Amapa 29.8°C
25 Georgetown 29.7°C
Show 25 more ▸
26 Arboletes 29.7°C
27 Puebloviejo 29.7°C
28 Mountain San Andres and Providencia 29.6°C
29 Necocli 29.6°C
30 Cocal State of Amapá 29.6°C
31 Providencia island 29.6°C
32 Barranquilla 29.6°C
33 Puerto Colombia 29.6°C
34 San Andres 29.6°C
35 Turbo 29.5°C
36 Acandi 29.5°C
37 Capurgana 29.5°C
38 Rosignol 29.5°C
39 New Amsterdam 29.4°C
40 Los Roques 29.4°C
41 Santa Marta 29.3°C
42 Guajira 29.3°C
43 Taganga 29.3°C
44 Tayrona 29.3°C
45 Playa Cepe 29.3°C
46 Skeldon 29.3°C
47 Gran Roque 29.3°C
48 Choroni 29.3°C
49 Costa de Oro 29.3°C
50 Catia La Mar Vargas 29.3°C

Coldest 10 in South America in September

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

# Location September mean
1 Weddell Sea Argentine Antarctica -1.8°C
2 Ronne Ice Shelf Argentine Antarctica -1.8°C
3 Signy Island Argentine Antarctica -1.7°C
4 Scotia Bay Argentine Antarctica -1.6°C
5 Caleta la Mision Tierra del Fuego 3.7°C
6 Rio Grande 3.9°C
7 Bahía San Sebastián Tierra del Fuego 4.0°C
8 Tierra del Fuego 4.1°C
9 Rio Gallegos 4.4°C
10 Punta Catalina Magallanes y la Antártica Chilena 4.5°C

More on this region