About Safe Harbor Great Island Boat Yard
Great Island Boat Yard & Marina is a welcoming, family-run operation located just 40 minutes north of Portland in a naturally protected, beautiful cove. Our modern boat yard facilities include a custom post and beam building housing offices, a ship’s store, and guest amenities. While staying in our marina, you gain access to our expert mechanical and electrical service techs and riggers, as well as our on-site cafe and live music events. Need to provision for coastal cruising or an ocean passage? Pre-order with Craft Kitchen & Provisions!

Facilities
COORDINATES
43.82995 N, -69.91537 E
Port Information
Telephone
Berth Sizes
10-20m, 20m+
Depth at MLW
2 - 3m
Manoeuvrability
Fair
Channel Marking
Excellent
VHF Channel
9
Port of Entry
No
Overseas Visitor Berths
Yes
Catamaran Berths
Yes
Dock Type
Floating
Style Side To
Yes
Tidal Flow
Negligible
Active Winter
Yes
Weather Forecast
Wed
5AM - 9AM
18 February 2026
- NW 4 knots.
- 0°C
- Cloudy
Wed
9AM - 1PM
18 February 2026
- N 5 knots increasing to 10 knots.
- 0 to 2°C
- SE 0.5m at 8s period
- UV Index: 1 - Low
- Cloudy
Wed
1PM - 5PM
18 February 2026
- N 8–10 knots.
- −1 to 2°C
- SE 0.5m at 7s period
- UV Index: 0 - Low
- Cloudy