First, make sure you take your boat to a CoastGuard Auxillary station, and get your "Saftey Check" and sticker. Not only will they make sure you haven't forgotten any critical saftey items, it will also save you some time at the dock when the County Sheriffs Marine Patrol is conducting random inspections as you come in from fishing.
Next, check the swell prediction here:
http://forecasts.surfingmagazine.com/Your looking for low swell (2-5ft), with long intervels (10-15 secs.)
AS WELL as Wind speeds. This will equate to additional "chop" added to that swell.
I don't go if swell is predicted to be over about 6ft. with any wind.
Next check the Tide Table here:
http://www.softseas.net/WashingtonTides/Default.aspxOnly real thing to watch for here is an extreme low tide heading out in the a.m., or at your predicted return time in the p.m. Also taking into account the weather.
You will almost always ecounter choppy water at "the bar", unless you happen to hit the perfect "slack" on a calm day. Regardless, take it slow, keep your bow into the swells, and ease over the big ones. My first few times out, I just left around the same time as the Charter boats, so I had some help around, plus they will give you a pretty good idea of where the schools have been.