Water temperature in Port Severn

This data the coastal Port Severn 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 water temperature in Port Severn

Water temperature in Port Severn today is 18.8°C. Based on our historical data over a period of ten years, the warmest water in this day in the Georgian Bay near Port Severn was recorded in 2017 and was 22.3°C, and the coldest was recorded in 2012 at 16.6°C. Water temperature in Port Severn is expected to drop to 16.6°C in the next 10 days. September average water temperature in Port Severn is 19.9°C, the minimum temperature is 16.1°C, and the maximum is 23.7°C.

The swimming season in Port Severn lasts from July to September. During those months, Port Severn water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Port Severn in winter reaches 1.8°C, in spring 4.7°C, in summer the average temperature rises to 21.1°C, and in autumn it is 14.4°C.

Port Severn water temperature now

Surf Forecast in Port Severn 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 Severn. 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 Severn. 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 Port Severn

Port Severn weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
17.2°C	16.9°C	16.5°C	16.3°C

12-15 h	15-18 h	18-21 h	21-24 h
16.9°C	17°C	17.1°C	16.7°C

Port Severn water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Port Severn. 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 Severn 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 Severn

The nearest beaches and cities from Port Severn 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
Thunder Beach	18.4°C	16°C		0.37 m
Wasaga Beach	18.1°C	17°C		0.26 m
Collingwood	18.1°C	17°C		0.16 m
Craigleith	18°C	17°C		0.32 m
Lake Couchiching	19.2°C	16°C		0.25 m
Orillia	19.2°C	16°C		0.16 m
Kempenfelt Bay	19°C	20°C		0.16 m
Centennial Beach	19°C	20°C		0.16 m
Meaford	18°C	17°C		0.28 m
Barrie	19.2°C	16°C		0.16 m

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Our report for Port Severn 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.