Answer
May mornings can be cool with afternoon highs in the 70s; September still hits warm beach days but evenings cool fast. Pack layers for sea breezes and check NWS for tropical remnants in early fall.
Sources: National Weather Service · Visit Ocean City
Editorial visitor guidance for Ocean City, Maryland. Confirm current Town of Ocean City, Maryland DNR, NPS Assateague, and NWS rules when regulations or safety apply.
