Water temperature in Altona

This data the coastal Altona 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 Altona

Water temperature in Altona today is 11.5°C. Based on our historical data over a period of ten years, the warmest water in this day in Altona was recorded in 2013 and was 12.4°C, and the coldest was recorded in 2015 at 10.9°C. Sea water temperature in Altona is expected to rise to 12.2°C in the next 10 days. September average water temperature in Altona is 12.3°C, the minimum temperature is 10.6°C, and the maximum is 15.4°C.

The swimming season in Altona lasts from December to March. During those months, Altona water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Altona in winter reaches 11.6°C, in spring 14.7°C, in summer the average temperature rises to 20.6°C, and in autumn it is 17.8°C.

Altona water temperature now

The ocean salinity in Altona is 37.17‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Altona 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 Altona. 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 Altona. 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)

Surf report in Altona

Altona weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
5.7°C	4.9°C	4.2°C	8°C

12-15 h	15-18 h	18-21 h	21-24 h
11°C	12°C	9.6°C	8.4°C

Altona water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Altona. 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 Altona 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 Altona

The nearest beaches and cities from Altona 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
Middle Park	11.5°C	13°C		0.35 m
St Kilda beach	11.5°C	13°C		0.35 m
Brighton	11.5°C	13°C		0.35 m
St Kilda	11.5°C	13°C		0.35 m
Sandringham	11.5°C	13°C		0.35 m
Black Rock	11.6°C	12°C		0.35 m
Elwood	11.6°C	12°C		0.35 m
Hampton	11.6°C	12°C		0.35 m
Parkdale	11.6°C	12°C		0.47 m
Mordialloc	11.6°C	12°C		0.47 m

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Altona Beach

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Our report for Altona 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.