Answer
Christian churches and other worship communities serve Ocean City and nearby mainland towns; many list seasonal service times that expand in summer. Visitor centers, lodging racks, and congregation websites are practical starting points. Confirm times the Saturday before—summer schedules change.
Sources: Visit Ocean City · Town of 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.