What is the current water temperature in Toronto?

Q: What is the current water temperature in Toronto?

As of now, in Toronto, the water temperature is 5.85°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

Canada > Toronto

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.

42.5

°F

May 15, 12:47

Trend:

stable

Yesterday:

42.6°F

Tomorrow:

42.6°F

Sunrise:

05:53

Sunset:

20:36

Day Length:

14 h. 43 min.

Toronto in May

Minimum:

37.0°F

Average:

38.7°F

Maximum:

40.0°F

Water temperature in Toronto today

As of now, in Toronto, the water temperature is 42.5°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.9°F lower than the average recorded on this particular day in recent years. The water temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent water temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 48.3°F on 2024, while the historical minimum was 41.7°F on 2020.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 43.8°F, with minimum temperature starting at 42.6°F, while the maximum might reach 45.2°F.

Daily water temperature in Toronto

Date	Current Year actual* / forecast**	last year	10 years average
May 1	41.1°F	41.0°F	40.7°F
May 2	40.5°F	40.3°F	41.2°F
May 3	40.7°F	41.5°F	41.5°F
May 4	39.5°F	41.5°F	41.5°F
May 5	40.7°F	41.7°F	41.6°F
May 6	41.3°F	41.9°F	41.6°F
May 7	41.2°F	43.8°F	42.1°F
May 8	40.4°F	41.4°F	42.3°F
May 9	40.6°F	41.7°F	42.5°F
May 10	40.9°F	41.8°F	42.7°F
May 11	41.8°F	41.7°F	42.6°F
May 12	40.7°F	41.9°F	42.7°F
May 13	41.8°F	44.6°F	43.2°F
May 14	42.6°F	43.6°F	43.7°F
May 15	42.5°F	43.7°F	44.4°F
May 16	42.6°F	45.8°F	44.5°F
May 17	43.1°F	44.2°F	45.0°F
May 18	43.5°F	42.1°F	45.4°F
May 19	43.4°F	43.4°F	45.3°F
May 20	44.3°F	44.6°F	46.2°F
May 21	44.8°F	45.0°F	46.7°F
May 22	45.2°F	44.6°F	47.1°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 March 16, 2025, dipping to 33.0°F. The average readings by season are 38.3°F in Winter, 40.4°F in Spring, 64.7°F in Summer, and 57.9°F in Autumn.