Surf fishing on Washington Coast? Get your road atlas out and look at the routes to these areas, all accessed off of US-101: Long Beach Peninsula (WA-103), Grayland/Westport (WA-105), Ocean Shores to Pacific Beach (WA-109).
My local experience is that the “beach experience” is different between the Washington and Oregon coasts. The Washington Coast in the areas listed are flat, wide beaches leading to the surf, whereas Oregon beaches generally are narrower and steeper. Beach access: in Oregon you stay on 101. In Washington you need to get off the beaten path, hence the routes I suggested. The Washington Coast gets busy too, but not so much as the Oregon Coast because everyone has heard about “take 101 down the Oregon Coast.”
The beach on the Long Beach Peninsula really is “long”. 25 miles long. They bill it as “The Longest Beach in the World”. That wouldn’t surprise me a bit.
I hope this helps. Have a great trip.