Beware the South wind. If it does show it is brutal. If it is under 10 feet combined and the period is greater than 10 seconds it is do-able but not likely fun on a jet boat.
This is based on my limited experience and from what I have learned from others.
The only time I was ever nervouse on Tillimook bay it was in a South wind. I won't do that again and I wouldn't recommend it. If it was that rough inside the bay I shudder to think what it was like at the bar on the ebb or outside for that matter.