Cut loose from Portland Harbor and let a local captain thread a 14-passenger RIB through Casco Bay’s lighthouses, forts, and seal-haunted coves in 90 minutes. Fast, informative, and photo-ready—this tour hits the highlights and the quieter corners where wildlife shows best.
More ways to explore the area's outdoor wonders
The RIB skims the gray-green edge of Portland Harbor and the city unspools behind you—brick warehouses, the working waterfront, a gull that seems to decide your route. Within minutes the rhythm of the engine replaces traffic noise and Casco Bay opens: scattered granite islands, squat fort ruins, and lighthouses marking edges where tides push and backs off. On a 14-passenger rigid inflatable boat, the captain steers a line through currents that shape Maine’s coast and every passenger gets a front-row seat.
Difficulty
moderate
Duration
1.5 hours (90 minutes)
Fitness Level
Moderate fitness—able to board from a dock and stand for periods; stable footing recommended.
Wildlife
History
Casco Bay’s islands and lighthouses trace layers of maritime history from Indigenous navigation and colonial fisheries to 19th-century coastal defenses and modern lobstering.
Conservation
Respect wildlife by keeping distance from seal haul-outs and avoiding loud noise; the operator follows guidelines to minimize disturbance and prevent feeding or interacting with animals.
Reserve your spot on the Guided RIB Boat Adventure of Casco Bay today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Arrive early
Be at the paid lot at the end of Thames Street 15 minutes before departure; the crew meets guests by the blue picnic tables and tour flag.
Dress in wind layers
Bring a windproof jacket and warm mid-layer—offshore wind can make temps drop quickly even on sunny days.
Bring binoculars and a zoom lens
Wildlife and lighthouse details are best seen with binoculars or a telephoto lens; phones work but limited reach.
Motion-sickness precautions
If you’re prone to seasickness, take medication before boarding; the RIB’s speed and chop can be lively.
Windproof jacket
Blocks spray and the bay’s brisk wind, keeping you comfortable during exposed stretches.
Binoculars
Essential for spotting seals, porpoises, and distant lighthouse details.
Camera with zoom or telephoto lens
Captures wildlife and architectural details from the RIB without crowding the subject.
Non-slip closed-toe shoes
Provide secure footing on a moving, wet deck and during boarding.