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
09 April 2026
- SW 4–8 knots.
- Increasing from −3 to 3°C
- Calm sea
- UV Index: 0 - Low
- Sunny
Thu
9AM - 1PM
09 April 2026
- S 8 knots increasing to 14 knots. Gusts up to 19 knots.
- 2 to 5°C
- S 0.4m at 3s period
- UV Index: 5 - Moderate
- Sunny
Thu
1PM - 5PM
09 April 2026
- S 12–15 knots. Gusts up to 23 knots.
- 4°C
- S 0.5m at 3s period
- UV Index: 5 - Moderate
- Sunny