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
Thu
5AM - 9AM
19 February 2026
- N 7 knots decreasing to 4 knots. Gusts up to 17 knots.
- −9 to −4°C
- Calm sea
- UV Index: 0 - Low
- Partly cloudy
Thu
9AM - 1PM
19 February 2026
- N 4–6 knots.
- Increasing from −4 to 0°C
- Calm sea
- UV Index: 1 - Low
- Cloudy
Thu
1PM - 5PM
19 February 2026
- NW 2–7 knots backing S 2-7 knots.
- −4 to 0°C
- Calm sea
- UV Index: 0 - Low
- Mostly fine