Martins Haven is a small shingle bay with rock marks either side. It fishes onto a rough bottom. There are patches of kelp.
Fish include mackerel, pollack, wrasse, smoothhound, huss.
Take the B4327 from Haverfordwest to Dale. Martins Haven is signposted off this road just before Dale. The road leads to a car park above the cove. Walk down the road round a sharp bend and take the path down, which is steep.