Portsmouth Harbor, Four Tree Island
Past nights from AIS in Sept 2024 and Sept 2025
Where boats stayed: 43.079° N, 70.746° W
3nights
2boats
Nights by wind direction
| From | Nights | Boats | Wind 20 kt+ | Windiest night (area) |
|---|---|---|---|---|
| NE | 1 | 1–2 | – | 8.3 ktgusts 13.2 kt |
| SE | 1 | 1–2 | – | 6 ktgusts 9.1 kt |
| W | 1 | 1–2 | – | 8.4 ktgusts 14.2 kt |
Nearby anchorages
- Old Harbour2 nights
- Portsmouth Harbor, Goat Island5 nights
- Little Harbor, Shapleigh Island5 nights
- Piscataqua River, Nobles Island1 night
- Portsmouth Harbor, N.H., North of New - Castle Island1 night
- Anchorage in Back Channel29 nights
- Anchorage off Seavey's Island6 nights
- Portsmouth Harbor, Jamaica Island14 nights
AIS shows only boats that carry it and that a receiver hears, so no boats on AIS never means an anchorage is empty or unsuitable. Boats that live here (at their own berth or mooring, or a week or more in one place) are left out, and boats in marinas and at piers are counted apart from the anchorage's nights. Not for navigation.