Water temperature in Alexander Bay

This data the coastal Alexander Bay sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Alexander Bay

Water temperature in Alexander Bay today is 11.5°C. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Alexander Bay was recorded in 2007 and was 13.4°C, and the coldest was recorded in 2023 at 10.4°C. Sea water temperature in Alexander Bay is expected to rise to 12.9°C in the next 10 days. September average water temperature in Alexander Bay is 12.3°C, the minimum temperature is 9.3°C, and the maximum is 14.5°C.

Throughout the year, the water temperature in Alexander Bay does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of January, February, the water temperature warms up to 20°C and above. The average water temperature in Alexander Bay in winter reaches 12.7°C, in spring 13.2°C, in summer the average temperature rises to 16.2°C, and in autumn it is 14.5°C.

Alexander Bay water temperature now

The sea salinity in Alexander Bay is 32.67‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Alexander Bay for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Alexander Bay. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Alexander Bay. Data in table shown for 30 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Alexander Bay

Alexander Bay weather forecast

Current temperature and weather

Data in a table show Alexander Bay temperature today (30 September 2025). For more information and forecast for a few days, go to the weather forecast Alexander Bay.

0-3 h	3-6 h	6-9 h	9-12 h
12.8°C	13.2°C	13.3°C	15.8°C

12-15 h	15-18 h	18-21 h	21-24 h
20.1°C	19.6°C	17.8°C	15.7°C

Alexander Bay water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Alexander Bay. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Alexander Bay on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Alexander Bay

The nearest beaches and cities from Alexander Bay with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Hondeklip Bay	11.7°C	34°C		1.66 m
Skeleton Bay	13°C	21°C		1.59 m
Strandfontein	13.2°C	27°C		1.2 m
Lambert's Bay	13.3°C	26°C		1.06 m
Elands Bay	13.4°C	32°C		1.01 m
Dwarskersbos	14°C	28°C		0.77 m
Britannia Bay	13.4°C	26°C		1.07 m
St Helena Bay	13.8°C	26°C		0.8 m
Paternoster	12.9°C	26°C		1.32 m
Velddrif	14.1°C	28°C		0.61 m

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Our report for Alexander Bay is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.