Water temperature in Mount Martha

This data the coastal Mount Martha 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 Mount Martha

Water temperature in Mount Martha today is 12.8°C. Based on our historical data over a period of ten years, the warmest water in this day in the Bass Strait near Mount Martha was recorded in 2013 and was 13.6°C, and the coldest was recorded in 2008 at 12.1°C. Sea water temperature in Mount Martha is expected to rise to 13.3°C in the next 10 days. September average water temperature in Mount Martha is 12.3°C, the minimum temperature is 10.5°C, and the maximum is 14.9°C.

The swimming season in Mount Martha lasts from January to March. During those months, Mount Martha water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Mount Martha in winter reaches 11.8°C, in spring 14.5°C, in summer the average temperature rises to 20.2°C, and in autumn it is 17.8°C.

Mount Martha water temperature now

The ocean salinity in Mount Martha is 37.03‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Mount Martha 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 Mount Martha. 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 Mount Martha. Data in table shown for 22 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Mount Martha

Mount Martha weather forecast

Current temperature and weather

Data in a table show Mount Martha temperature today (22 September 2025). For more information and forecast for a few days, go to the weather forecast Mount Martha.

0-3 h	3-6 h	6-9 h	9-12 h
9.5°C	8.9°C	8.4°C	10.2°C

12-15 h	15-18 h	18-21 h	21-24 h
11.6°C	11.9°C	10.5°C	9.6°C

Mount Martha water temperature by month

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

The nearest beaches and cities from Mount Martha 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
Mount Eliza	12.8°C	12°C		1.05 m
Safety Beach	12.8°C	12°C		1.22 m
Rosebud	13°C	13°C		2.23 m
Carrum	12.7°C	12°C		0.99 m
Seaford	12.7°C	12°C		0.99 m
Balnarring	13.1°C	12°C		1.01 m
Hastings	13.2°C	12°C		1.5 m
Point Leo	13.1°C	12°C		1.5 m
Shoreham	13.1°C	12°C		1.5 m
Merricks Beach	13.1°C	12°C		1.5 m

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Mt Martha

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Our report for Mount Martha 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.