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Water temperature in Marion Bay

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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 14.2°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 2013 and was 16°C, and the coldest was recorded in 2010 at 13.4°C. Sea water temperature in Marion Bay is expected to rise to 14.5°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


5 September 2025
today temp
14.2°C
4 September 2025
yesterday temp
14.2°C


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 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

0-3 h3-6 h6-9 h9-12 h
4' 5"4' 0"3' 10"3' 9"
1.34 m1.23 m1.16 m1.15 m
12-15 h15-18 h18-21 h21-24 h
3' 10"3' 7"3' 5"2' 10"
1.16 m1.09 m1.03 m0.87 m

Surf report in Marion Bay

Marion Bay wave height and direction

Marion Bay weather forecast

Marion Bay wind speed and direction

Current temperature and weather

Data in a table show Marion Bay temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Marion Bay.

0-3 h3-6 h6-9 h9-12 h
5.8°C7.1°C8.4°C10.8°C
12-15 h15-18 h18-21 h21-24 h
13°C14.4°C12.2°C13.5°C

You may also be interested in other sections of our site for Marion Bay: Sunrise and Sunset, Tides

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

MonthAvrMinMax
January20.3°C18.2°C22.5°Cwarm
Ocean water temperature in Marion Bay in January
February20.6°C18.3°C22.7°Cwarm
Ocean water temperature in Marion Bay in February
March19.8°C17.7°C22.7°Ccold
Ocean water temperature in Marion Bay in March
April18.4°C16°C20.2°Ccold
Ocean water temperature in Marion Bay in April
May17.2°C15.7°C19.1°Ccold
Ocean water temperature in Marion Bay in May
June15.9°C14.5°C17.5°Ccold
Ocean water temperature in Marion Bay in June
July14.8°C13.6°C16.3°Ccold
Ocean water temperature in Marion Bay in July
August14.3°C12.7°C15.6°Ccold
Ocean water temperature in Marion Bay in August
September14.6°C13.4°C16.4°Ccold
Ocean water temperature in Marion Bay in September
October15.5°C13.8°C17.4°Ccold
Ocean water temperature in Marion Bay in October
November17.1°C15°C20.1°Ccold
Ocean water temperature in Marion Bay in November
December18.7°C16.3°C21°Ccold
Ocean water temperature in Marion Bay in December

Chart monthly average water temperature in Marion Bay

Water temperature in Marion Bay

Where is the warmest sea water in the world?

If you want to plan a vacation on the beach and enjoy the warm sea, choose the day of the year, region and the minimum comfortable sea/ocean temperature that interests you. As a result, you will get a list of countries and cities in which the average sea temperature or maximum temperature on this day over the past 10 years exceeds your chosen value

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

Nearby beaches and cities

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

WaterWeatherWave
Stokes Bay14.2°C14°C1.11 m
Point Turton13.3°C16°C0.66 m
Edithburgh13.2°C16°C0.93 m
Kingscote13.7°C14°C0.64 m
Vivonne Bay14.6°C14°C2.15 m
Kangaroo Island14.6°C14°C1.95 m
Port Vincent13.2°C16°C0.65 m
Penneshaw13.5°C14°C0.74 m
Cape Jervis13.2°C16°C0.87 m
Port Lincoln14.3°C15°C0.8 m

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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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.

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