Marine Forecast
Issued 03:00 AM EDT 04 October 2026
Today Tonight and Monday.
Strong wind warning in effect.
Wind southeast 15 knots diminishing to south 10 early this
morning then increasing to southwest 15 late this morning. Wind increasing to
northwest 20 early this evening and to northwest 30 overnight. Wind diminishing
to northwest 20 near noon Monday and to northwest 15 Monday
evening.
Scattered showers today and this
evening.
Winds
Issued 03:00 AM EDT 04 October 2026
Today Tonight and Monday.
Strong wind warning in effect.
Wind southeast 15 knots diminishing to south 10 early this
morning then increasing to southwest 15 late this morning. Wind increasing to
northwest 20 early this evening and to northwest 30 overnight. Wind diminishing
to northwest 20 near noon Monday and to northwest 15 Monday
evening.
Waves
Issued 03:00 AM EDT 04 October 2026
Today Tonight and Monday.
Waves 0.5 to 1 metre building to 1.5 this evening and to 2 to 3
Monday morning. Waves subsiding to 1.5 Monday afternoon.
Weather & Visibility
Issued 03:00 AM EDT 04 October 2026
Today Tonight and Monday.
Scattered showers today and this
evening.
Ice Forecasts
Lake Huron
Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.Ice Forecasts
Lake Michigan
Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.
Warnings (In effect)
Southern Lake Huron
Issued 03:00 AM EDT 04 October 2026'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.
Technical Marine Synopsis
Issued 3:00 AM EDT 4 October 2026 Today Tonight and Monday At 3:00 a.m. EDT today departing high 1030 mb located near Maine.
At 3:00 a.m. EDT today trough located on a line north-south over
western Lake Superior.
By 3:00 a.m. EDT Monday trough located on a line northeast-southwest
over eastern Lake Ontario.
At 3:00 a.m. EDT today low 1010 mb located over northwestern
Ontario.
By 3:00 a.m. EDT Monday low 998 mb located east of James Bay.