The water south of Block Island is core southwest New England tuna ground, taking in the edges and lumps and the mud-hole area known as the Dump. It is within a reasonable run of Point Judith, Block Island and Montauk, and it holds bluefin through the season, with other tuna showing when the warm water pushes in.
The ground
Fish the edges, lumps and bottom transitions along with the broad mud grounds, keying on bait, temperature breaks and current. Squid are often a major forage here.
How to fish it
Troll the breaks and edges to find fish, then jig, pop or fish bait on the fish you locate.
Tip This whole southwest zone fishes on temperature and bait. When the warm water and the squid push up onto the edges, the tuna follow, so let the water tell you where to start the troll.