Water temperature in Western Port Bay

This data the coastal Western Port 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 Western Port Bay

Water temperature in Western Port Bay today is 12.2°C. Based on our historical data over a period of ten years, the warmest water in this day in the Bass Strait near Western Port Bay was recorded in 2013 and was 13.7°C, and the coldest was recorded in 2018 at 11.6°C. Sea water temperature in Western Port Bay is expected to rise to 12.7°C in the next 10 days. September average water temperature in Western Port Bay is 12.8°C, the minimum temperature is 11°C, and the maximum is 15.6°C.

The swimming season in Western Port Bay lasts from January to March. During those months, Western Port Bay water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Western Port Bay in winter reaches 12.5°C, in spring 14.6°C, in summer the average temperature rises to 19.5°C, and in autumn it is 17.4°C.

Western Port Bay water temperature now

The ocean salinity in Western Port Bay is 36.37‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Western Port 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 Western Port 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 Western Port 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)

Surf report in Western Port Bay

Western Port Bay weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
7.5°C	6.9°C	6.9°C	9.3°C

12-15 h	15-18 h	18-21 h	21-24 h
10.7°C	12°C	9.9°C	8.8°C

Western Port Bay water temperature by month

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

The nearest beaches and cities from Western Port 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
Hastings	12.2°C	12°C		1.02 m
Balnarring	12.3°C	12°C		0.51 m
Point Leo	12.4°C	12°C		1.02 m
Shoreham	12.4°C	12°C		1.02 m
Merricks Beach	12.4°C	12°C		1.02 m
Surf Beach	12.5°C	12°C		0.86 m
Corinella	12.3°C	12°C		0.74 m
Mount Martha	11.6°C	12°C		0.49 m
Mornington	11.6°C	12°C		0.49 m
Mount Eliza	11.6°C	12°C		0.49 m

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Our report for Western Port 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.