Water temperature in Marion Bay

This data the coastal Marion Bay ocean 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 ocean temperature in Marion Bay

Water temperature in Marion Bay today is 14.9°C. Based on our historical data over a period of ten years, the warmest water in this day in the Indian Ocean near Marion Bay was recorded in 2023 and was 15.9°C, and the coldest was recorded in 2016 at 14.1°C. Sea water temperature in Marion Bay is expected to rise to 15.1°C in the next 10 days. September average water temperature in Marion Bay is 14.6°C, the minimum temperature is 13.4°C, and the maximum is 16.4°C.

The swimming season in Marion Bay lasts from January to March. During those months, Marion Bay water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Marion Bay in winter reaches 15°C, in spring 15.7°C, in summer the average temperature rises to 19.9°C, and in autumn it is 18.5°C.

Marion Bay water temperature now

The ocean salinity in Marion Bay is 36.66‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Marion 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 Marion 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 Marion Bay. Data in table shown for 25 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Marion Bay

Marion Bay weather forecast

Current temperature and weather

Data in a table show Marion Bay temperature today (25 September 2025). For more information and forecast for a few days, go to the weather forecast Marion Bay.

0-3 h	3-6 h	6-9 h	9-12 h
9.5°C	9.3°C	10.3°C	15.9°C

12-15 h	15-18 h	18-21 h	21-24 h
18.1°C	17.4°C	13.4°C	13.4°C

Marion Bay water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Marion 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 Marion 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 Marion Bay

The nearest beaches and cities from Marion 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
Stokes Bay	14.9°C	17°C		1.53 m
Point Turton	14.6°C	16°C		0.65 m
Edithburgh	14.4°C	15°C		0.93 m
Kingscote	14.2°C	17°C		0.48 m
Vivonne Bay	14.9°C	17°C		2.96 m
Kangaroo Island	14.9°C	17°C		2.57 m
Port Vincent	14.8°C	16°C		0.3 m
Penneshaw	13.9°C	17°C		0.65 m
Cape Jervis	13.8°C	16°C		0.88 m
Port Lincoln	15.1°C	18°C		0.81 m

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Our report for Marion 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.