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Government of Canada / Gouvernement du Canada

Wave Height Forecasts for the Great Lakes and St. Lawrence River (On)


* NOTE: Corrected and/or amended bulletins are listed first *

 
FQCN23 CWTO 190700
Wave height forecasts for the Canadian portion of the Great Lakes
issued by Environment Canada at 3:00 a.m. EDT Thursday 19 March 2026
for today tonight and Friday.
The next scheduled forecast will be issued at 10:30 a.m. EDT.

Wave heights are for offshore and are forecast from trough to crest.
Nearshore waves may vary considerably due to shoreline effects.

Western Lake Superior.
Over open water waves 0.5 metres or less building to 1.5 near
midnight then subsiding to 1 Friday morning. Waves subsiding to 0.5
or less Friday afternoon.

Eastern Lake Superior.
Over open water waves 1 to 1.5 metres.

Whitefish Bay.
Mainly ice covered.

Northern Lake Huron.
Over open water waves 1 to 1.5 metres.

Southern Lake Huron.
Over open water waves 1 to 1.5 metres subsiding to 0.5 or less this
morning then building to 1.5 Friday morning. Waves subsiding to 0.5
to 1 near noon Friday and to 0.5 or less Friday evening.

Northern Georgian Bay.
Mainly ice covered.

Southern Georgian Bay.
Over open water waves 0.5 to 1 metre subsiding to 0.5 or less early
this evening then building to 1 Friday morning. Waves subsiding to
0.5 or less Friday afternoon.

Lake St. Clair.
Waves less than 0.5 metres building to 0.5 or less overnight and to
0.5 to 1 Friday morning. Waves subsiding to 0.5 or less Friday
evening.

Western Lake Erie.
Waves 0.5 to 1 metre subsiding to 0.5 or less early this morning then
building to 1.5 Friday morning. Waves subsiding to 0.5 to 1 Friday
evening.

Eastern Lake Erie.
Over open water waves 0.5 metres building to 1 to 1.5 Friday morning
then subsiding to 0.5 or less Friday evening.

Western Lake Ontario.
Waves 0.5 metres building to 1 near noon Friday then subsiding to 0.5
or less Friday evening.

Eastern Lake Ontario.
Over open water waves 0.5 to 1 metre subsiding to 0.5 or less near
midnight then building to 1 near noon Friday. Waves subsiding to 0.5
Friday evening.

End
$$$$^^

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