I'm coming down from Massachusetts to do the HIM. I'm bringing the family and we'll spend the week after doing all the local attractions between Williamsburg and Viginia Beach. I didn't think the water would be so warm as to be wetsuit illegal so I'm glad somebody brought that up. It's going to be a bit chilly doing OWS without one for the first few weeks up here.
It will be close temp wise, the Jamestown Olympic last year at that site was on July 1st. Had it not been for a thunderstorm, the swim would not of be wet suit legal but only by a degree or two.