Water temperature Lake Ontario

June 22, 2015
Rob s Crossing… trying

Canada Sea Water TemperatureWater temperature (3 °C) at Toronto Breaks is close to freezing. Despite the weak sunshine, the air will feel like -15 °C. Even if you wear a thick winter wetsuit, a neoprene hood, neoprene gloves and boots, it will still be difficult to stay in the sea for very long today.

Map of current Canada
Surface Water Temperatures
based on measurements from oceanographic satellites

Map of current Canada
Sea Water Temperature Anomalies

(compared with long term averages
at this time of year)

(click thumbnails to expand)

Below is a graph of Historical Sea Surface Temperature for Toronto Breaks. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

Canada Water Temperature Anomaly

All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

Toronto Breaks sea water temperatures peak in the range 18 to 24°C (64 to 75°F) on around the 10th of August and are at their coldest on about the 13th of February, in the range 1 to 2°C (34 to 36°F). Toronto Breaks sea water temperatures are highest in early to mid August. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. The coldest sea water temperatures at Toronto Breaks mean that you will need a flexible 6/5/4mm wetsuit or a well fitting 5/4mm wetsuit with gloves and 5mm neoprene booties and a hood to surf here in the third week of February.

Actual sea surface water temperatures close to shore at Toronto Breaks can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Toronto Breaks. Refer to our detailed weather forecasts for this information.

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