The word is out for surfers as far as Mendocino, Napa, and San Francisco counties:
Surf’s Up at Dillon! 

Rent or purchase all the necessary gear and wear at the Surf Shop right inside
the General Store.

Surf boards, boogie boards, wet suits, hoods, and booties are $19.95 for a suit or board and $35.00 for the two. A deposit is required.