Marine Forecast
Issued 06:30 PM EDT 21 March 2026
Tonight and Sunday.
Wind south 20 knots diminishing to southwest 10 late overnight
then veering to northwest 10 early Sunday morning. Wind increasing to north 20
late Sunday morning and to north 25 Sunday afternoon.
Scattered showers ending Sunday
afternoon.
Strong wind warning program has ended for the season.
Winds
Issued 06:30 PM EDT 21 March 2026
Tonight and Sunday.
Wind south 20 knots diminishing to southwest 10 late overnight
then veering to northwest 10 early Sunday morning. Wind increasing to north 20
late Sunday morning and to north 25 Sunday afternoon.
Strong wind warning program has ended for the season.
Waves
Issued 06:30 PM EDT 21 March 2026
Tonight and Sunday.
Over open water waves 0.5 metres building to 1.5 this evening
then subsiding to 0.5 or less early Sunday morning. Waves building to 1.5 near
noon Sunday and to 2 Sunday evening.
Weather & Visibility
Issued 06:30 PM EDT 21 March 2026
Tonight and Sunday.
Scattered showers ending Sunday
afternoon.
Ice ForecastsSouthern Lake HuronIssued 12:00 PM EDT 21 March 2026 Today Tonight and Sunday
Ice Coverage
Open water except 5 tenths new lake ice including 2 tenths thick lake ice in Saginaw Bay. 7 tenths thick lake ice along parts of the eastern shore. Consolidated thick lake ice along parts of the northeastern shore.
Ice ForecastsNorthern Lake MichiganIssued 12:00 PM EDT 21 March 2026 Today Tonight and Sunday
Ice Coverage
1 tenth thick lake ice except 9 tenths thick lake ice north of and east of Fox Islands. Consolidated thick lake ice in the Straits of Mackinac.
Ice ForecastsSouthern Lake MichiganIssued 12:00 PM EDT 21 March 2026 Today Tonight and Sunday
Ice ForecastsGreen BayIssued 12:00 PM EDT 21 March 2026 Today Tonight and Sunday
Ice Coverage
9 tenths thick lake ice. Consolidated thick lake ice in Bays de Noc and in southern Green Bay.
No watches or warnings in effect.
Technical Marine SynopsisIssued 6:30 PM EDT 21 March 2026 Tonight and Sunday At 6:30 p.m. EDT tonight low 1000 mb located over northern Wisconsin. By 6:30 p.m. EDT Sunday trough from 1003 mb low located on a line east-west over Pennsylvania.
By 6:30 p.m. EDT Sunday approaching ridge located on a line northeast-southwest over Lake Nipigon.
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