Marine Forecast
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Wind south 15 knots increasing to south 20 early this morning
then veering to southwest 25 near noon. Wind veering to west 25 near midnight
then to northwest 25 Sunday morning. Wind diminishing to west 15 near noon
Sunday and to west 10 Sunday evening.
Scattered flurries overnight and Sunday
morning.
Strong wind warning program has ended for the season.
Winds
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Wind south 15 knots increasing to south 20 early this morning
then veering to southwest 25 near noon. Wind veering to west 25 near midnight
then to northwest 25 Sunday morning. Wind diminishing to west 15 near noon
Sunday and to west 10 Sunday evening.
Strong wind warning program has ended for the season.
Waves
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Over open water waves 0.5 to 1 metre building to 1.5 this
afternoon then subsiding to 1 Sunday morning. Waves subsiding to 0.5 or less
Sunday evening.
Weather & Visibility
Issued 03:00 AM EST 20 December 2025
Today Tonight and Sunday.
Scattered flurries overnight and Sunday
morning.
Ice ForecastsIssued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
No watches or warnings in effect.
Technical Marine SynopsisIssued 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.
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