Answer
Yes—storms send beach crowds indoors simultaneously, so arrive when doors open or shop midweek. Air-conditioned aisles beat soggy Boardwalk walks when lightning clears the sand. Keep umbrellas in the car; parking lots pool water fast on Delmarva downpours.
Sources: Visit Ocean City · National Weather Service
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.
