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Coldest sea in South America in September

947 coastal locations in South America ranked by typical September sea temperature, coldest first. Region-wide average in September: 18.6°C.

Coldest in September

Weddell Sea

-1.8°C September mean in Argentina

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.

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 September

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

# 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
11 Cabo Virgenes Santa Cruz 4.5°C
12 Magellan Strait East Entrance Magallanes Region 4.5°C
13 Punta Dungeness Magallanes y la Antártica Chilena 4.5°C
14 Cabo Posesion Magallanes y la Antártica Chilena 4.5°C
15 Ajax Bay East Falkland 4.6°C
16 New Haven East Falkland 4.6°C
17 North West Islands North West Islands 4.6°C
18 Lively Settlement East Falkland 4.9°C
19 Mare Harbour East Falkland 4.9°C
20 Great Island East Falkland 5.0°C
21 Port Howard Lafonia 5.0°C
22 Speedwell Island Falkland Sound 5.0°C
23 Swan Island Swan Island 5.0°C
24 Port Salvador Entrance East Falkland 5.0°C
25 Fitzroy Creek East Falkland 5.0°C
Show 25 more ▸
26 Berkeley Sound Lafonia 5.1°C
27 Port Stanley-B East Falkland 5.1°C
28 Punta Delgada Magallanes y la Antártica Chilena 5.2°C
29 Stanley 5.2°C
30 Golding Island North West Islands 5.2°C
31 Pebble Island North West Islands 5.2°C
32 Port Stanley-A East Falkland 5.3°C
33 Bleaker Island East Falkland 5.3°C
34 Adventure Sound East Falkland 5.3°C
35 Keppel Sound West Falkland 5.3°C
36 Roy Cove West Falkland 5.3°C
37 Fanny Cove Creek East Falkland 5.4°C
38 North Arm East Falkland 5.4°C
39 Fox Bay West Falkland 5.4°C
40 Saunders Island North West Islands 5.4°C
41 Albemarle West Falkland 5.5°C
42 Westpoint Island North West Islands 5.5°C
43 Comandante Luis Piedrabuena 5.5°C
44 Port Stephens West Falkland 5.5°C
45 Tierra del Fuego 5.6°C
46 Bahia Aguirre Tierra del Fuego 5.7°C
47 New Island North West Islands 5.7°C
48 Puerto Santa Cruz 5.7°C
49 Diego Ramirez Magallanes Region 5.7°C
50 Puerto Vancouver Tierra del Fuego Province 5.8°C

Warmest 10 in South America in September

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

# 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

More on this region