Portsmouth Harbor, Jamaica Island
Past nights from AIS in Aug 2024, Jun–Sept 2025 and Oct 2026
Where boats stayed: 43.081° N, 70.721° W
14nights
9boats
Nights by wind direction
| From | Nights | Boats | Wind 20 kt+ | Windiest night (area) |
|---|---|---|---|---|
| NE | 2 | 1–2 | – | 11 ktgusts 18.3 kt |
| E | 1 | 1–2 | – | 4.7 ktgusts 10 kt |
| SE | 4 | 3 | – | 5.1 ktgusts 9.4 kt |
| S | 3 | 3 | – | 12.9 ktgusts 21.4 kt |
| SW | 4 | 4 | – | 12 ktgusts 16.7 kt |
Nearby anchorages
- Anchorage off Seavey's Island6 nights
- Back Channel, Seavey Island29 nights
- Portsmouth Harbor30 nights
- Jones Cove, New Castle Island6 nights
- Portsmouth Harbor, N.H., North of New - Castle Island1 night
- Portsmouth Harbor, Sullivan Point5 nights
- Pepperrell Cove115 nights
- Portsmouth Harbor, New Castle Island5 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.