The Mackerel have been found off of Green harbor. You can jig some up off of Gurnet point as well but they are thicker up north.. The best way to jig for them is with a sabiki rig Try different depths as sometimes they are only 10 feet down and other times they are towards the bottom.
By the end of the week the bait should be pretty thick off of Gurnet point. Also, a few bass have been found in the bay, but with the mackerel here, the bass fishing should heat up by this weekend. I am going to try and get out this weekend for Cod if the wind dies down.