All data are in degrees Fahrenheit

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Water temperature in Toronto

Detailed information about the current water temperature in Toronto. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Water temperature in Toronto now

64.9

°F

September 17, 21:47

Trend:

increasing

Yesterday:

64.5°F

Tomorrow:

65.0°F

Sunrise:

06:59

Sunset:

19:25

Day Length:

12 h. 26 min.

Toronto in September

Minimum:

36.3°F

Average:

38.5°F

Maximum:

39.7°F

Water temperature in Toronto today

As of now, in Toronto, the water temperature is 64.9°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.3°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent water temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 72.5°F on 2018, while the historical minimum was 64.2°F on 2019.

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 65.0°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Toronto

Date Current Year

actual* / forecast**

last year 10 years average
Sep 3 69.2°F 70.2°F 69.3°F
Sep 4 68.6°F 69.1°F 69.0°F
Sep 5 68.7°F 67.7°F 69.0°F
Sep 6 66.2°F 69.2°F 69.1°F
Sep 7 66.3°F 68.9°F 69.0°F
Sep 8 66.4°F 68.4°F 69.0°F
Sep 9 61.8°F 68.1°F 68.2°F
Sep 10 58.9°F 67.1°F 67.7°F
Sep 11 58.6°F 64.5°F 67.2°F
Sep 12 60.5°F 65.7°F 67.2°F
Sep 13 62.2°F 66.5°F 67.2°F
Sep 14 62.0°F 63.5°F 66.9°F
Sep 15 63.2°F 64.7°F 66.9°F
Sep 16 64.5°F 64.2°F 66.9°F
Sep 17 64.9°F 65.2°F 67.2°F
Sep 18 65.0°F 67.6°F 67.3°F
Sep 19 65.1°F 66.0°F 67.4°F
Sep 20 65.0°F 68.0°F 67.3°F
Sep 21 65.0°F 68.5°F 67.2°F
Sep 22 65.1°F 68.6°F 67.4°F
Sep 23 65.2°F 69.2°F 67.5°F
Sep 24 64.9°F 68.7°F 67.2°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Water temperature in Toronto by month

In an average year, Toronto offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Toronto was recorded on August 13, 2025, reaching a 77.6°F. While the coldest temperature occurred on February 20, 2015, dipping to 32.0°F. The average readings by season are 38.4°F in Winter, 40.2°F in Spring, 64.4°F in Summer, and 57.7°F in Autumn.