Grimsby Municipal Launch
Lake Ontario · ramp
Grimsby Municipal Launch
Lake Ontario · ramp
24-Hour Wave Forecast
Safety context
Conditions can differ at the ramp and on your route. Check official warnings, local notices, visibility and your boat's operating limits. You are responsible for the launch decision.
Official Forecast
Environment Canada · Lake Ontario
Lac Ontario Est
Tonight and Monday.
Wind west 15 knots veering to northwest 15 this evening then diminishing to light early Monday morning. Wind becoming southeast 10 Monday afternoon.
Lac Ontario Ouest
Tonight and Monday.
Wind southwest 10 knots veering to northwest 10 this evening then becoming light late overnight. Wind becoming southeast 10 Monday afternoon.
Extended Outlook
Tuesday
Wind south 15 knots veering to southwest 20 in the morning then to northwest 20 late in the day.
Wednesday
Wind west 25 knots.
Thursday
Wind west 20 knots.
Not for navigation. Verify official charts and local conditions.
Technical Logistics
Last verified 2026-06-10Data verified 2026-06-10 · Sources: OSM + municipal parks