Marine forecasts are anticipating high winds of 20 to 25 knots throughout Monday afternoon and evening.
That's when many powerboats and sailboats will be heading home from the Gulf Islands or Vancouver Island.
Mike Cotter of the Jericho sailing centre in Kitsilano, says the trip across the Strait of Georgia will be challenging even for experienced boaters.
"For instance, if you're travelling down the highway at 60 to 70 kilometres you stick your head out the window you can get an idea what that type of wind feels like," he said.
"On the ocean of course that causes large seas and waves and it's a pretty harsh and unforgiving environment."
Cotter says inexperienced boaters would be wise to stay on the other side of the Strait of Georgia and wait until Tuesday to return.