Western Lake Superior


Marine Forecast

Issued 06:30 PM EDT 23 July 2016

Tonight and Sunday

Strong wind warning in effect.

Wind light becoming southeast 15 knots near midnight then diminishing to southwest 10 early Sunday morning. Wind increasing to west 20 near noon Sunday.

A few showers beginning near midnight and ending early Sunday morning with a risk of thunderstorms. Visibility 1 mile or less in showers.


Issued 06:30 PM EDT 23 July 2016
Tonight and Sunday Waves one half metre or less building to one Sunday afternoon.

Extended Forecast

Issued 06:30 PM EDT 23 July 2016
Monday Wind west 15 knots.
Tuesday Wind northwest 15 knots diminishing to light.
Wednesday Wind light.

Stay connected


Weather Conditions

Skip Image

Zoom-in to make a selection

Map of Great Lakes - Lake Superior marine weather areas Mid Superior - 45001 East Superior - 45004 West Superior - 45006 Slate Island - 45136 Lake Of the Woods - 45148 Royal Island Armstrong Airport Caribou Island Marathon Airport Pukaskwa National Park Thunder Bay Airport Welcome Island Little Flatland Island Sault Ste. Marie Airport Wawa Airport Kenora Airport
buoy Buoy
land station Land Station
Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 7 May 2016 Forecasts have ended for the season.

Warnings (In effect)

Strong wind warning in effect

Western Lake Superior

Issued 6:30 PM EDT 23 July 2016

'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 or Weatheradio stations.


Technical Marine Synopsis

Issued 3:00 AM EDT 24 July 2016 Today Tonight and Monday At 3:00 a.m. EDT today departing ridge located on a line north-south
over eastern Ontario.

At 3:00 a.m. EDT today low 999 mb located over the Ontario -
Manitoba border.
By 3:00 a.m. EDT Monday low 999 mb located southwest of James Bay.

At 3:00 a.m. EDT today trough located on a line northwest-southeast
over northwestern Ontario.
By 3:00 a.m. EDT Monday cold front from low located over Lake
Nipissing extending southwestward.

By 3:00 a.m. EDT Monday high located over Nebraska.

Great Lakes - Lake Superior Area

Another Region

What we are doing

Date modified: