Coldest sea in South Africa in September

115 coastal locations in South Africa ranked by typical September sea temperature, coldest first. Region-wide average in September: 17.0°C.

Coldest in September

Marion Island

5.1°C September mean in South Africa

Regional September average

17.0°C

across all 115 coastal locations in South Africa

Vs annual mean

-1.4°C

below the year-round regional average

What the South Africa 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 Africa monthly average 16.8°C to 20.4°C

Warmest month February 20.4°C
Coldest month August 16.8°C
Annual mean 18.4°C
Months above 20°C 2 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 Africa month rankings:

South Africa sea temperature map (live)

The map shows today's latest reading at every South Africa 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 Africa 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	Country	September mean
1	Marion Island Western Cape	South Africa	5.1°C
2	Port Nolloth	South Africa	12.2°C
3	Alexander Bay	South Africa	12.8°C
4	Hondeklip Bay	South Africa	13.2°C
5	Lamberts Bay Western Cape	South Africa	13.5°C
6	Elands Bay	South Africa	13.5°C
7	St Helena Bay	South Africa	13.8°C
8	Velddrif	South Africa	13.8°C
9	Buffels Bay Western Cape	South Africa	14.2°C
10	Bloubergstrand	South Africa	14.3°C
11	Camps Bay	South Africa	14.3°C
12	Cape Town	South Africa	14.3°C
13	Clifton	South Africa	14.3°C
14	Sea Point	South Africa	14.3°C
15	Sunset Beach	South Africa	14.3°C
16	Paternoster	South Africa	14.4°C
17	Langebaan	South Africa	14.5°C
18	Big Bay Western Cape	South Africa	14.6°C
19	Robben Island Western Cape	South Africa	14.6°C
20	Table Bay Western Cape	South Africa	14.6°C
21	Schrywers Hoek Western Cape	South Africa	14.6°C
22	Schrywershoek Western Cape	South Africa	14.6°C
23	Yzerfontein	South Africa	14.6°C
24	Boulders Beach	South Africa	14.6°C
25	Fish Hoek	South Africa	14.6°C

Show 25 more ▸

26	Glencairn Beach	South Africa	14.6°C
27	Hout Bay	South Africa	14.6°C
28	Kalk Bay	South Africa	14.6°C
29	Kommetjie	South Africa	14.6°C
30	Melkbosstrand	South Africa	14.6°C
31	Muizenberg	South Africa	14.6°C
32	Noordhoek	South Africa	14.6°C
33	Scarborough	South Africa	14.6°C
34	Simon's Town	South Africa	14.6°C
35	St James	South Africa	14.6°C
36	Saldanha	South Africa	14.8°C
37	Khayelitsha Western Cape	South Africa	15.1°C
38	Llandudno Western Cape	South Africa	15.1°C
39	Pringle Bay	South Africa	15.2°C
40	Milnerton	South Africa	15.2°C
41	Cape Point	South Africa	15.2°C
42	Gansbaai	South Africa	15.3°C
43	Pearly Beach	South Africa	15.3°C
44	Betty's Bay Western Cape	South Africa	15.4°C
45	De Hoop Nature Reserve Western Cape	South Africa	15.4°C
46	Rooiels Western Cape	South Africa	15.4°C
47	Gordon's Bay	South Africa	15.4°C
48	Strand	South Africa	15.4°C
49	Arniston	South Africa	15.5°C
50	Gaansbaai Western Cape	South Africa	15.5°C

Warmest 10 in South Africa in September

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

#	Location	Country	September mean
1	Sodwana Bay	South Africa	22.8°C
2	Kosi Bay KwaZulu-Natal	South Africa	22.7°C
3	Cape Vidal KwaZulu-Natal	South Africa	22.6°C
4	St Lucia	South Africa	22.5°C
5	Saint Lucia KwaZulu-Natal	South Africa	22.3°C
6	Margate	South Africa	22.0°C
7	Richards Bay	South Africa	22.0°C
8	Port Shepstone	South Africa	21.9°C
9	Port Saint Johns	South Africa	21.8°C
10	Amanzimtoti	South Africa	21.8°C