You can expect water temps to be around 79 degrees in the Nags Head surf in Aug. the first two weeks in Sept are similar but you should see a slight buildup of fish. During this time frame the normal catches are small bluefish, spanish, a few trout, flounders,whiting, a few puppy drum and pompano. If cold water in the 60's moves in the spanish and pompano will be replaced by croaker and grey trout. Croaker usually dominates the catches then.
Winds out of the nw w or sw will tend to muddy up the water. Usually the longer and stronger it blows the muddier and cooler the water becomes. Winds out of the north east are usually good and if mild the water will be clear enough for spanish, trout and pompano Winds out of due east blow offshore type clear water in and can be good for all of the above clear water species. Winds out of the southeast will blow water in from the gulf stream in. A nw to ne wind can cause mullet and other species of fish to move into the oregon inlet area. Some may enter the ocean. Fish onthe south side of Oregon inlet in those conditions.