Ice Forecasts

Issued 12:00 PM EDT 17 May 2026 Forecasts have ended for the season.

Warnings (In effect)

Squall warning in effect

Eastern Lake Ontario

Issued 3:34 PM EDT 14 June 2026 Squalls with wind gusts up to 35 knots, frequent lightning and poor to very poor visibility in showers heavy at times are expected or occurring in the area.

An area of thunderstorms located south of Point Petre is moving northeast at 20 knots.

Poor to very poor visibility may contribute to voyage delays and make marine navigation hazardous. Vessels without lightning protection should make their way to shore immediately. Mariners are advised to prepare for squalls. If underway, seek safe harbour immediately.

Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.

Strong wind warning in effect

Eastern Lake Ontario

Issued 10:30 AM EDT 14 June 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.

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Technical Marine Synopsis

Issued 10:30 AM EDT 14 June 2026 Today Tonight and Monday At 10:30 a.m. EDT today trough located from James Bay to Lake
Simcoe then to Lake St. Clair.
By 10:30 a.m. EDT Monday trough located on a line
northeast-southwest over the Eastern Seaboard.

At 10:30 a.m. EDT today low 996 mb located over eastern Hudson Bay.
By 10:30 a.m. EDT Monday low 998 mb located over northern Hudson
Bay.