If you are talking Astoria, the winds don't USUALLY pick up till about Noon and blow till about 5 pm. Depending on your boat, you won't want to be out there very far. I've seen 5' standing waves under the Megler bridge.
On the other hand, a forcast of 10-20 is the standard issue at Astoria. You have to be there to know if it is going to blow for sure (it usually does).
Get there early to enjoy the calm before the wind.
saw your other post about drano this week end the forecast for this area is 15-30 sat and 15-25 on sun your ok in side but it well be ROCK-N-ROLL on the main stream lots of fish see you on the water