Water temperature in Thornbury

This data the coastal Thornbury 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 Thornbury

Water temperature in Thornbury today is 18°C. Based on our historical data over a period of ten years, the warmest water in this day in the Georgian Bay near Thornbury was recorded in 2017 and was 21.5°C, and the coldest was recorded in 2014 at 16.1°C. Water temperature in Thornbury is expected to drop to 16.2°C in the next 10 days. September average water temperature in Thornbury is 19.3°C, the minimum temperature is 15.6°C, and the maximum is 22.4°C.

The swimming season in Thornbury lasts from July to September. During those months, Thornbury water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Thornbury in winter reaches 3.4°C, in spring 2.8°C, in summer the average temperature rises to 17.7°C, and in autumn it is 14.4°C.

Thornbury water temperature now

Surf Forecast in Thornbury 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 Thornbury. 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 Thornbury. 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 Thornbury

Thornbury weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
14.9°C	14.4°C	13.6°C	14.3°C

12-15 h	15-18 h	18-21 h	21-24 h
15.5°C	16.8°C	16.8°C	16.4°C

Thornbury water temperature by month

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

The nearest beaches and cities from Thornbury 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
Craigleith	18°C	17°C		0.32 m
Meaford	18°C	17°C		0.28 m
Mountain View Beach	18°C	21°C		0.3 m
Allenwood Beach	18.1°C	21°C		0.26 m
Woodland Beach	18.1°C	21°C		0.26 m
Balmy Beach	18°C	20°C		0.15 m
Thunder Beach	18.4°C	16°C		0.37 m
Penetanguishene	18.7°C	16°C		0.34 m
Midland	18.8°C	17°C		0.34 m
Port Severn	18.8°C	17°C		0.34 m

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Our report for Thornbury 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.