Cornwall to Montreal, Canada Marine Forecast, Warnings and Alerts

Canada

N.America Satellite

Canada Radar

Current Conditions

Canada 7 Day High and Low Temperatures Forecast

10 Day Forecast

Lightning Danger Radar

Lightning Strikes Radar

Cornwall to Montreal

Marine Forecast

Issued 03:00 AM EDT 05 April 2026

Today Tonight and Monday.

Gale warning in effect.

Wind southeast 20 to 30 knots becoming southwest 25 to 35 early this morning then diminishing to southwest 15 to 25 early this evening. Wind veering to west 15 to 20 overnight then diminishing to light Monday evening.

Rain changing to scattered showers this afternoon and ending this evening. Scattered flurries overnight. Visibility as low as 1 mile in rain.

Temperatures plus 6 falling to minus 1 Monday evening.

Winds

Issued 03:00 AM EDT 05 April 2026

Today Tonight and Monday. Gale warning in effect. Wind southeast 20 to 30 knots becoming southwest 25 to 35 early this morning then diminishing to southwest 15 to 25 early this evening. Wind veering to west 15 to 20 overnight then diminishing to light Monday evening.

Weather & Visibility

Issued 03:00 AM EDT 05 April 2026

Today Tonight and Monday. Rain changing to scattered showers this afternoon and ending this evening. Scattered flurries overnight. Visibility as low as 1 mile in rain.

Air temperature

Issued 03:00 AM EDT 05 April 2026

Today Tonight and Monday. Temperatures plus 6 falling to minus 1 Monday evening.

There is no ice forecast issued for this area.

Warnings (In effect)

Gale warning in effect

Cornwall to Montréal

Issued 12:30 PM EDT 05 April 2026

'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 3:00 AM EDT 5 April 2026 Today Tonight and Monday At 3:00 a.m. EDT today high 1034 mb located over the Gulf of
St. Lawrence.
By noon EDT today departing high 1034 mb located over Newfoundland.

At 3:00 a.m. EDT today low 999 mb located over western Quebec.
By 8:00 p.m. EDT Monday low 986 mb located east of Labrador.

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