Burry Port, Llansteffan and Mumbles Coastguard Rescue Teams and a Senior Coastguard Operations Officer have been searching the coast along with Dyfed Powys Police along with HM Coastguard’s helicopter from St Athan and a police helicopter.
Volunteers from the cockling community have also been involved in the search under the coordination of Dyfed Powys Police.
An extensive search of North Gower including Pwll has been carried out but the missing man has not yet been found.
A land-based search will resume at first light.
Peter Bailey, Senior Maritime Operations Officer with HM Coastguard said: “There has been a search of the entire area and everyone involved has made strenuous efforts to find this missing cockler. We will resume the search later this morning with our coastguard rescue teams and police.”