We're having the best Memorial Day weekend for the last 21 years here in Washington State . Three clear, blue-sky days with temps around 80F and humidity around 20% and it shouldn't revert to "normal" (cloudy and 65) before Wednesday.
Our neighborhood is close to Burroughs Bay, to the south, which is about 450' deep a couple of miles off shore. Since it's primarily snow-melt runoff from the Cascades, the water stays cold all the time. By the time you're knee deep, you can't feel your feet any more. With the prevailing breezes from the south, we usually stay 3 or 4 degrees less than further inland.
Wouldn't move from here unless I'm wearing a wooden overcoat.