Answer
Yes—afternoon wind shifts, incoming swell, and thunderstorm outflow can prompt flag upgrades within hours. Watch for whistle signals and stand announcements. Exit the water immediately when lifeguards change flags or call swimmers in.
Sources: Ocean City Beach Patrol · 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.
