How cold is the water of Lake Ontario?

The water temperature of Lake Ontario varies significantly depending on the season. In summer, it can reach temperatures of 70°F (21°C) or higher, while in winter, it can drop to around 32°F (0°C) or lower. Early spring and late fall temperatures typically range from the mid-40s to mid-50s Fahrenheit (about 7-15°C). For the most accurate conditions, it's best to check local weather reports or lake monitoring services.