4/3 wetsuit late spring, shorty to board shorts in late June through July and August. Water temp 50°F late spring to upper 60's°F in August (tide will effect this more than in Gorge). Air temps 50's to 70°F in spring and 70's to 90's°F in summer.
The predominant wind direction is South to Southeast. North will also work but is a little harder to predict. Watch out for winds that are too easterly as the winds can be gusty and you may have to head aways offshore to get clean wind.
Fly to Tacoma Airport. Take I-5 to Mt. Vernon, head west on Hwy 20. After a 90° left curve, turn right onto March's Point Rd. Drive up north and park and rig your gear.