Eastern Lake Ontario
Forecast
Marine Forecast
Issued 06:30 PM EDT 16 July 2025
Tonight and Thursday.
Strong wind warning in effect.
Wind light becoming south 10 knots this evening then increasing to south 15 early Thursday morning. Wind increasing to west 25 near noon Thursday then veering to northwest 20 Thursday evening.
Scattered showers with a risk of thunderstorms.
Waves
Issued 06:30 PM EDT 16 July 2025
Tonight and Thursday.
Waves 0.5 metres or less building to 0.5 to 1 Thursday morning
and to 2 Thursday afternoon.
Extended Forecast
Issued 06:30 PM EDT 16 July 2025
Friday
Wind northwest 20 knots diminishing to light in
the morning.
Saturday
Wind light.
Sunday
Wind west 15 knots diminishing to light late in
the day.
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Weather Conditions
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Ice Conditions
*Ice Forecast and Warnings also apply to U.S. waters
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.Warnings
Warnings (In effect)
Strong wind warning in effect
Eastern Lake Ontario
Issued 9:58 PM EDT 16 July 2025'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 or Weatheradio stations.
Warnings (Ended)
Squall warning ended
Eastern Lake Ontario
Issued 00:10 AM EDT 17 July 2025Synopsis
Technical Marine Synopsis
Issued 6:30 PM EDT 16 July 2025 Tonight and Thursday At 6:30 p.m. EDT tonight low 1005 mb located over southernWisconsin.
By 6:30 p.m. EDT Thursday low 999 mb located over the St. Lawrence
River.
At 6:30 p.m. EDT tonight ridge located on a line east-west over
Lake Nipigon.
By 6:30 p.m. EDT Thursday ridge located on a line
northwest-southeast over western Lake Superior.
Great Lakes - Lake Huron Area
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