Water temperature in Gwynneville

This data the coastal Gwynneville 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 Gwynneville

Water temperature in Gwynneville today is 18.8°C. Based on our historical data over a period of ten years, the warmest water in this day in Gwynneville was recorded in 2013 and was 19.4°C, and the coldest was recorded in 2009 at 16.6°C. Sea water temperature in Gwynneville is expected to drop to 18.2°C in the next 10 days. September average water temperature in Gwynneville is 17.3°C, the minimum temperature is 15.2°C, and the maximum is 19.5°C.

The swimming season in Gwynneville lasts from November to May. During those months, Gwynneville water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Gwynneville in winter reaches 17.9°C, in spring 18.5°C, in summer the average temperature rises to 22.1°C, and in autumn it is 21.8°C.

Gwynneville water temperature now

The ocean salinity in Gwynneville is 35.31‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Gwynneville 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 Gwynneville. 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 Gwynneville. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Gwynneville

Gwynneville weather forecast

Current temperature and weather

Data in a table show Gwynneville temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Gwynneville.

0-3 h	3-6 h	6-9 h	9-12 h
12.2°C	11.4°C	11.4°C	17.4°C

12-15 h	15-18 h	18-21 h	21-24 h
20.7°C	21°C	17.4°C	14.9°C

Gwynneville water temperature by month

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

The nearest beaches and cities from Gwynneville 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
Port Kembla	19°C	25°C		0.55 m
Bellambi	18.9°C	25°C		0.66 m
Thirroul	18.8°C	25°C		0.66 m
Bulli Beach	18.8°C	25°C		0.66 m
Woonona	18.8°C	25°C		0.66 m
Lake Heights	19.1°C	25°C		0.79 m
Warilla	18.7°C	25°C		0.79 m
Lake Illawarra	18.9°C	25°C		1 m
Austinmer	19.1°C	25°C		0.94 m
Coledale	19.1°C	25°C		0.94 m

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Our report for Gwynneville 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.