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KwaZulu-Natal Sea Temperature in September

South Africa

August KwaZulu-Natal year-round → October

Average sea temperature for KwaZulu-Natal, South Africa across September, based on 10 years of daily readings.

Average

20.9° C

High

23.21° C

Low

19.24° C

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.

September is the 11th warmest of 12 months at KwaZulu-Natal. On average the water sits 2.0° than the year-round mean of 22.9° C.

Compared to August, September is 0.3° warmer than (20.58° C in August). By October the water is usually 21.49° C.

KwaZulu-Natal Day-by-Day Water Temperature in September

10-year low, average and high

18.5° C
19.9° C
21.3° C
22.6° C
24.0° C
1
5
10
15
20
25
30
Day-by-day low and high band with the 10-year daily average through September. Range Average

Each vertical bar above is one day of September. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at KwaZulu-Natal.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

September Water Temperature Table for KwaZulu-Natal

10-year daily averages

Day Average Low High
September 1 20.38° C 19.94° C 20.84° C
September 2 20.4° C 19.9° C 21.12° C
September 3 20.43° C 19.9° C 21.24° C
September 4 20.48° C 20.1° C 21.35° C
September 5 20.35° C 19.56° C 21.29° C
September 6 20.38° C 19.57° C 21.16° C
September 7 20.56° C 19.89° C 21.27° C
September 8 20.6° C 19.87° C 21.43° C
September 9 20.7° C 20.08° C 21.61° C
September 10 20.88° C 20.03° C 22.35° C
September 11 20.97° C 19.83° C 22.64° C
September 12 20.98° C 20.06° C 22.64° C
September 13 20.96° C 20.11° C 22.63° C
September 14 21.03° C 20.2° C 22.1° C
September 15 21.05° C 20.07° C 21.94° C
September 16 21.08° C 19.68° C 21.89° C
September 17 21.05° C 19.6° C 21.88° C
September 18 21.04° C 19.31° C 21.98° C
September 19 21.02° C 19.36° C 22.09° C
September 20 21° C 19.24° C 22.17° C
September 21 21.03° C 19.3° C 22.32° C
September 22 21.08° C 19.84° C 22.34° C
September 23 21.1° C 19.89° C 22.74° C
September 24 21.04° C 20.22° C 23.21° C
September 25 21.13° C 20.67° C 22.32° C
September 26 21.32° C 20.8° C 22.01° C
September 27 21.42° C 20.87° C 22.13° C
September 28 21.29° C 21.01° C 21.89° C
September 29 21.17° C 20.43° C 21.95° C
September 30 21.13° C 19.92° C 22.24° C

Where September Sits in the Year

September highlighted

18.0° C
20.9° C
23.8° C
26.6° C
29.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
24.86° C
25.36° C
25.15° C
24.35° C
23.41° C
21.6° C
21.02° C
20.58° C
20.9° C
21.49° C
22.45° C
23.61° C
10-year monthly history for KwaZulu-Natal. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in September

Compare other South Africa water for the same month

KwaZulu-Natal Location

-28.5306, 30.8958

-28.53055, 30.89582 View on OpenStreetMap →

KwaZulu-Natal sits at -28.5306°N, 30.8958°E, on the coast of South Africa. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to KwaZulu-Natal