Port Clyde is the point of departure for the Laura B., the mail boat that runs to Monhegan Island. It's operated by the Monhegan Boat Line. In summer the Balmy Days sails daily between Boothbay Harbor and Monhegan Island. Boats operated by Hardy Boat Cruises leave daily from Shaw's Wharf in New Harbor.
Balmy Days (800/298-2284). Hardy Boat Cruises (207/677-2026 or 800/278-3346). Monhegan Boat Line (207/372-8848).