I'd go, if the wind direction stays the same the 20 knots isn't really a factor. Your not far off shore to get to perch fishing depths off of Bruce. Less than 2 miles. Not really room for the waves to get rolling. The forecast for the 12 hours before is also a factor. If its really blowing from the east, west or south there can still be big rollers in the morning even if the wind is turning to offshore. I'm going to go to Goderich to troll, also offshore wind forecast.