Welcome Aboard!Port Harbor Marine is the state’s largest and most progressively managed marine dealer with an excellent reputation for quality, reliability, and customer satisfaction. Our flagship Marina at Spring Point in South Portland, is Maine’s largest full-service marina with over 250 slips, and can accommodate yachts up to 200 ft. in length, and is conveniently located at the entrance of Portland Harbor. With 6 locations throughout Maine, Port Harbor Marine is poised to make your on the water boating experience a dream! We are Just For Fun!