Apr 12, 2021 — Lake Ontario is eight inches lower than average for this time of year. That’s the lowest it’s been in early April since 2015. The chance of flooding on the lake and the St. Lawrence River this summer is relatively low.
Lake Ontario's water level is below average for this time of year, its lowest since 2015. Chart: International Lake Ontario St. Lawrence River Board.Spring came early, exposing low wetlands and shorelines along Lake Ontario and the St. Lawrence River. "But this is really the lowest part of water levels for the year," says Tony David, the St. Regis Mohawk Tribe's environment director and a member of the International Lake Ontario St. Lawrence River Board, which oversees water flows from below Niagara Falls to Montreal. "It’s also the time when Lake Ontario begins its seasonal rise."