Marine Forecast
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Gale warning in effect.
Wind northwest 15 knots backing to southwest 15 this evening
then increasing to southwest 25 near midnight. Wind increasing to southwest 35
early Friday morning then diminishing to southwest 25 near noon
Friday.
Scattered flurries beginning near midnight changing to snow
Friday morning. Visibility 1 mile or less in snow.
Risk of freezing spray overnight.
Strong wind warning program has ended for the season.
Winds
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Gale warning in effect.
Wind northwest 15 knots backing to southwest 15 this evening
then increasing to southwest 25 near midnight. Wind increasing to southwest 35
early Friday morning then diminishing to southwest 25 near noon
Friday.
Strong wind warning program has ended for the season.
Waves
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Waves 0.5 to 1 metre building to 1.5 near midnight and to 2 to 3
late overnight. Waves subsiding to 1.5 Friday afternoon.
Weather & Visibility
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Scattered flurries beginning near midnight changing to snow
Friday morning. Visibility 1 mile or less in snow.
Freezing Spray
Issued 06:30 PM EST 04 December 2025
Tonight and Friday.
Risk of freezing spray overnight.
Ice Forecasts
Issued 12:00 PM EDT 16 May 2025 Forecasts have ended for the season.
Warnings (In effect)
Northern Georgian Bay
Issued 7:01 PM EST 04 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 6:30 PM EST 4 December 2025 Tonight and Friday At 6:30 p.m. EST tonight ridge located on a line northeast-southwest
over southwestern Ontario.
By 6:30 p.m. EST Friday departing ridge located on a line
northeast-southwest over the Maritimes.
At 6:30 p.m. EST tonight cold front located on a line east-west
over southern Manitoba.
By 6:30 p.m. EST Friday cold front located on a line
northeast-southwest over Lake Superior.