A new report finds unsafe bacteria levels at many Great Lakes beaches, including Ontario Beach in Rochester. Climate change ...

Lake Ontario boasts more than 50 lighthouses on the Canadian and U.S. shores, many along the St. Lawrence River to the northeast, Great Lakes Proud says. How many shipwrecks are there in Lake Ontario?

Seatemperature.org says the average temperature of Lake Ontario is 41.9 degrees Fahrenheit in May. It rises in June to 58.8, and 70.5 in July, before topping out at nearly 73 degrees in August.