This map from the Department of Fisheries gives you the scope of Lobster Fishing Areas 33 and 34. The seasons are different for various LFAs. Some are in the summer. Some LFAs are only open for a month or so. LFAs 33 and 34 have the toughest season since it begins now and runs through May. The boats don't go out, though, when the weather is too rough. This business of catching lobsters is dangerous enough even on calm days.
By sighting the boundary between LFA 34 and LFA 33, then looking to the right a tad to the longest inlet, you will have located Shelburne Harbour. McNutt's Island sits on the outermost edge of it.
For more information you can go to the DFO web site.