Lake Ontario - Marine Weather - Environment Canada Environment Canada https://www.weather.gc.ca 2026-05-12T14:27:11Z tag:weather.gc.ca,2013-04-16:20260512142711 https://www.weather.gc.ca/template/gcweb/v15.0.0/assets/wmms-alt.png https://www.weather.gc.ca/template/gcweb/v15.0.0/assets/favicon.ico Copyright 2026, Environment Canada STRONG WIND WARNING IN EFFECT, Eastern Lake Ontario 2026-05-12T14:30:00Z 2026-05-12T14:30:00Z Issued 10:30 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08203_w1:20260512143000 Forecast for Today Tonight and Wednesday. - Eastern Lake Ontario 2026-05-12T14:30:00Z 2026-05-12T14:30:00Z Wind variable 10 knots becoming southeast 10 early this evening then increasing to southeast 15 late overnight. Wind increasing to southeast 20 early Wednesday morning then veering to south 20 near noon Wednesday. Wind diminishing to southwest 15 Wednesday afternoon. Scattered showers overnight and Wednesday. Risk of thunderstorms Wednesday morning and afternoon. <br/>Issued 10:30 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08203_regular_forecast:20260512143000 Waves for Today Tonight and Wednesday. - Eastern Lake Ontario 2026-05-12T14:30:00Z 2026-05-12T14:30:00Z Waves 0.5 metres or less building to 1 to 1.5 early Wednesday morning.<br/>Issued 10:30 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08203_waves:20260512143000 Extended Forecast - Eastern Lake Ontario 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z Thursday: Wind light.<br/>Friday: Wind light becoming west 15 knots.<br/>Saturday: Wind west 15 knots.<br/>Issued 03:00 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08203_extended_forecast:20260512070000 STRONG WIND WARNING IN EFFECT, Western Lake Ontario 2026-05-12T14:30:00Z 2026-05-12T14:30:00Z Issued 10:30 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08207_w1:20260512143000 Forecast for Today Tonight and Wednesday. - Western Lake Ontario 2026-05-12T14:30:00Z 2026-05-12T14:30:00Z Wind light becoming east 10 knots this afternoon then increasing to southeast 15 this evening. Wind increasing to southeast 20 near midnight then veering to south 20 early Wednesday morning. Wind diminishing to southwest 15 near noon Wednesday. Scattered showers tonight and Wednesday. Risk of thunderstorms Wednesday morning and afternoon. <br/>Issued 10:30 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08207_regular_forecast:20260512143000 Waves for Today Tonight and Wednesday. - Western Lake Ontario 2026-05-12T14:30:00Z 2026-05-12T14:30:00Z Waves 0.5 metres or less building to 1 late overnight.<br/>Issued 10:30 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08207_waves:20260512143000 Extended Forecast - Western Lake Ontario 2026-05-12T07:00:00Z 2026-05-12T07:00:00Z Thursday: Wind light.<br/>Friday: Wind light becoming west 15 knots.<br/>Saturday: Wind west 15 knots.<br/>Issued 03:00 AM EDT 12 May 2026 tag:weather.gc.ca,2013-04-16:08207_extended_forecast:20260512070000