Answer
Seasonal outdoor or beach-adjacent services appear in some summers through local congregations or ministries—availability is not guaranteed every week. Dress for sun and bring water if worship is outdoors. Follow any Town rules about amplification and gathering spaces.
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.