The Salish Sea is a combination of three bodies of water on the west coast of British Columbia — the Straits of Georgia and Juan de Fuca and the Puget Sound, streyching from Campbell River on northern Vancouver Island south to Washigton State.
High pressure systems bring winds out of the NW of around 15 to 30 mph and sometimes even as strong as 40 mph ! Low pressure systems always come with SE winds at about 15 to 20 mph. But the winter storms can pick up to 50 or 60 mph. Crossing the Georgia Straits from Point Grey to Entrance Island (one of the windiest places in the whole area) is 28 miles, the longest route across. The shortest route being from Tsawassen to the tip of Gabriola, 11.8 miles.
Expect waves on the starboard bow or on the port broadside. Better yet to wait for windless day and enjoy a flat, calm crossing.
A sailor with time always has fair winds!