Water temperature in Port Denison

This data the coastal Port Denison 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 Port Denison

Water temperature in Port Denison today is 20.2°C. Based on our historical data over a period of ten years, the warmest water in this day in the Indian Ocean near Port Denison was recorded in 2008 and was 21.7°C, and the coldest was recorded in 2016 at 19.1°C. Sea water temperature in Port Denison is expected to be constant 20.2°C in the next 10 days. October average water temperature in Port Denison is 19.8°C, the minimum temperature is 17.8°C, and the maximum is 21.9°C.

The swimming season in Port Denison lasts from October to June. During those months, Port Denison water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Port Denison in winter reaches 19.5°C, in spring 19.9°C, in summer the average temperature rises to 23.2°C, and in autumn it is 22.6°C.

Port Denison water temperature now

The ocean salinity in Port Denison is 35.17‰, and the average salinity of the World Ocean is 35‰.

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

Surf report in Port Denison

Port Denison weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
12.1°C	10.9°C	10.6°C	19.8°C

12-15 h	15-18 h	18-21 h	21-24 h
23.9°C	21.3°C	17.7°C	16.3°C

Port Denison water temperature by month

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

The nearest beaches and cities from Port Denison 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
Dongara	20.2°C	21°C		1.28 m
Waggrakine	20°C	21°C		1.61 m
Geraldton	19.9°C	21°C		1.65 m
Houtman Abrolhos	20.8°C	21°C		1.74 m
Cervantes	20.7°C	20°C		1.63 m
Lancelin	20.1°C	19°C		1.62 m
Guilderton	19.4°C	19°C		1.43 m
Yanchep	19.4°C	18°C		0.97 m
Two Rocks	19.4°C	18°C		1.2 m
Mindarie	19.5°C	18°C		1.12 m

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Our report for Port Denison 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.