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
Sun
5AM - 9AM
15 March 2026
- NW 5–9 knots.
- −4 to −1°C
- Calm sea
- UV Index: 0 - Low
- Partly cloudy
Sun
9AM - 1PM
15 March 2026
- N 6 knots decreasing to S 3 knots.
- −1 to 2°C
- Calm sea
- UV Index: 3 - Moderate
- Cloudy
Sun
1PM - 5PM
15 March 2026
- S 6 knots increasing to 10 knots.
- 1°C
- Calm sea
- UV Index: 2 - Low
- Cloudy