Marine Forecast
Issued 10:30 AM EDT 20 June 2026
Today Tonight and Sunday.
Strong wind warning in effect.
Wind southwest 15 knots increasing to southwest 20 near noon
then diminishing to southwest 15 early this evening. Wind diminishing to west 10
near midnight then backing to southwest 10 Sunday morning. Wind becoming light
Sunday afternoon.
Scattered showers this afternoon and this evening with a
risk of thunderstorms.
Winds
Issued 10:30 AM EDT 20 June 2026
Today Tonight and Sunday.
Strong wind warning in effect.
Wind southwest 15 knots increasing to southwest 20 near noon
then diminishing to southwest 15 early this evening. Wind diminishing to west 10
near midnight then backing to southwest 10 Sunday morning. Wind becoming light
Sunday afternoon.
Waves
Issued 10:30 AM EDT 20 June 2026
Today Tonight and Sunday.
Waves 0.5 to 1 metre subsiding to 0.5 or less this
evening.
Weather & Visibility
Issued 10:30 AM EDT 20 June 2026
Today Tonight and Sunday.
Scattered showers this afternoon and this evening with a
risk of thunderstorms.
Ice Forecasts
Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings (In effect)
Western Lake Ontario
Issued 10:30 AM EDT 20 June 2026'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio.
Technical Marine Synopsis
Issued 10:30 AM EDT 20 June 2026 Today Tonight and Sunday At 10:30 a.m. EDT today departing low 990 mb located over the Gulf
of St. Lawrence.
At 10:30 a.m. EDT today ridge located on a line northwest-southeast
over North Dakota.
By 10:30 a.m. EDT Sunday ridge located on a line northwest-southeast
over Lake Superior.