Onslow beach reports in the past have been pretty good, August can be tough with the heat, but all boils down to ocean temps., a front moving through, surf conditions, etc., but you know all that. Bring a throw net and look for finger mullet in some of the little creeks on base, they maybe in the surf also, dig for sandfleas or use something that looks like sandfleas, they make a orange strip bait, think it's called Fishbites EZ flea, use a small piece about the size of your finger nail and put on a river rig or any small hook or double hook rig, if you catch a whiting with that, cut him up for bait. Good luck Marine, let us know how you did.