Marine Forecast
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Gale warning in effect.
Wind northwest 25 knots diminishing to variable 10 early this
morning then increasing to southwest 15 late this morning. Wind backing to south
20 this afternoon then veering to southwest 25 this evening. Wind increasing to
west 35 overnight then diminishing to west 30 Sunday afternoon. Wind veering to
northwest 25 Sunday evening.
Scattered showers beginning this evening changing to
scattered flurries Sunday morning.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Gale warning in effect.
Wind northwest 25 knots diminishing to variable 10 early this
morning then increasing to southwest 15 late this morning. Wind backing to south
20 this afternoon then veering to southwest 25 this evening. Wind increasing to
west 35 overnight then diminishing to west 30 Sunday afternoon. Wind veering to
northwest 25 Sunday evening.
Strong wind warning program has ended for the season.
Waves
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Waves 2 to 3 metres subsiding to 0.5 to 1 this morning then
building to 2 near midnight. Waves building to 3 to 4 Sunday morning then
subsiding to 2 Sunday evening.
Weather & Visibility
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Scattered showers beginning this evening changing to
scattered flurries Sunday morning.
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings (In effect)
Eastern Lake Ontario
Issued 03:00 AM EST 20 December 2025'Gale' force winds of 34 to 47 knots are occurring or expected to occur in this marine area. Watch for updated statements. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Technical Marine Synopsis
Issued 3:00 AM EST 20 December 2025 Today Tonight and Sunday At 3:00 a.m. EST today ridge located on a line north-south over
northeastern Ontario.
By 3:00 a.m. EST Sunday departing ridge located on a line
northwest-southeast over the Gulf of St. Lawrence.
At 3:00 a.m. EST today low 996 mb located north of Lake of the
Woods.
By 3:00 a.m. EST Sunday low 999 mb located over western Quebec.
By 3:00 a.m. EST Sunday ridge located on a line north-south over
Minnesota.