how far out were you when you lost the board? i've lost mine there before and it turned up downwind at those yellowish rocks where the boardwalk is.
i think the tide tends to take it there.. when i lost my board, a friend of mine checked that spot because he had lost his board and had it turn up at the same place. i'd say as long as you werent too far out or some lucky bastard has found it already, that's where it'll be

good luck