Maybe 3 to 6 feet:
http://www.weatheroffice.ec.gc.ca/marine/marine_e.html?45142
Small craft wind warning in effect..
Wind southeast 15 to 20 knots veering to southwest 20 this afternoon then increasing to 25 this evening. Scattered showers with isolated thunderstorms. Waves 1 to 2 metres.
Outlook..Strong southwesterlies diminishing to light to moderate then veering to westerlies.