How much wind is too much?

Heading back to berryessa tomorrow and its looks to blow all day. From what I've seen it is supposed to be around 9mph all day with gusts up to 15+. For the most part I have only paddled around 5mph wind but I know 10+ is even a pain in a 20 foot bass boat. What are your guys' take on fishing in the wind and what is too much wind?

I find 20 to be around the point where I cannot make headway against the wind.  And anything over 10 is annoying.

If you are trolling you can deal with a bit higher 10-15 max. If trying to bass fish anything over about 6-8 sucks.

Thanks for the responses. We made it out the berryessa today and lucky for me the forecasters got it wrong. Other than in the morning the wind was calm most of the day. The bass bite is on out there. Landed around 30 bass and missed about a dozen more. Good size, mostly males from 2-4 lbs and a to if smallies, witch is always fun. All fish came in plastics, couldn't get any takers in reaction baits.