Eastern Lake Ontario
Forecast
Marine Forecast
Issued 10:30 AM EDT 21 April 2021
Today Tonight and Thursday.
Wind north 15 knots backing to northwest 15 this afternoon then increasing to northwest 20 this evening. Wind increasing to west 30 Thursday afternoon.
Snow ending this afternoon. Visibility as low as 1 mile in snow.
Strong wind warning program has ended for the season.
Waves
Issued 10:30 AM EDT 21 April 2021
Today Tonight and Thursday.
Waves one half metre or less building to one near midnight and to
2 Thursday evening.
Extended Forecast
Issued 03:00 AM EDT 21 April 2021
Friday
Wind west 20 knots.
Saturday
Wind west 15 knots diminishing to
light.
Sunday
Wind light increasing to west 25 knots late in
the day.
Ice Forecast*
Issued 12:00 PM EDT 21 April 2021 Today Tonight and Thursday Ice free.
*Ice Forecast and Warnings also apply to U.S. waters
Stay connected
Weather Conditions
Zoom-in to make a selection

Ice Conditions
*Ice Forecast and Warnings also apply to U.S. waters
Ice Forecasts
Issued 12:00 PM EDT 21 April 2021 Today Tonight and ThursdayIce Coverage
Ice free.
Warnings
No watches or warnings in effect.
Synopsis
Technical Marine Synopsis
Issued 10:30 AM EDT 21 April 2021 Today Tonight and Thursday At 10:30 a.m. EDT today low 1003 mb located over easternPennsylvania.
By 10:30 a.m. EDT Thursday deepening low 985 mb located over
New Brunswick.
At 10:30 a.m. EDT today ridge located on a line east-west over
Lake Nipigon.
By 10:30 a.m. EDT Thursday ridge located on a line
northeast-southwest over northeastern Ontario.
Great Lakes - Lake Huron Area
Another Region
What we are doing
Weather Forecasts
Weather Alerts
Weather Resources
- Date modified: