Portsmouth Harbor Inlet, NH to Gloucester, MA map preview
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Portsmouth Harbor Inlet, NH to Gloucester, MA Marine Weather Route Forecast

Short coastal hop along the New England shoreline.

Latest Automated Forecast

Optimized for marine passage planning, vessel routing, and coastal or offshore weather tracking. This automated marine weather routing tool updates daily using premium data models. Below is the weather, wave, and ocean current layout for a standard vessel transit from Portsmouth Harbor Inlet, NH to Gloucester, MA.

Generated: 2026-09-04T10:33:53.477127+00:00 • Distance: 35.9 NM • Departure: 2026-09-04T08:00:00-04:00 • Speed: 6 knots
Time Wind Waves Ocean Current Air/Water
2026-09-04T12:00:00+00:00 4.3736517 kts 0.7 m 0.3 kts E E 19.2 / 18.8 °C
2026-09-04T16:00:00+00:00 1.9978409000000001 kts 0.66 m 0.5 kts SW SW 18.6 / 19.3 °C
Locked forecast rows are available to signed-in users.

Route Passage Summary & Sea State

Expect mostly following winds with generally comfortable motion. Winds range from 2 to 4 kts with waves 1.7 to 2.3 ft with period of 6 to 7 seconds. Overall, seas and wind frequently opposed, expect confused motion. Wind angles: 67% following, 33% reaching. Sea state: 33% aligned, 33% cross-seas, 33% opposed.

More Detail

Points of Sail

CategoryPoint of SailWind AnglePortion of Passage
On the NoseNo-Go Zone0–45°0%
ReachingClose Hauled45–80°0%
ReachingBeam Reach80–110°0%
ReachingBroad Reach110–145°33%
FollowingRun145–180°67%

Sea State & Wave Motion

Sea StateWind vs. WavesBoat MotionPortion of Passage
AlignedWaves run with the windSteady, organized33%
Cross SeasWaves cross the windRolling33%
OpposedWaves against the windChoppy, confused33%
Historical Forecasts Download GPX File

Related Routes

Gloucester, MA to Portsmouth Harbor Inlet, NH
35.9 NM 8 waypoints
Cape Cod Canal, MA to Gloucester, MA
50.2 NM 5 waypoints
Cape Cod, MA to Gloucester, MA
47.3 NM 7 waypoints
Provincetown Harbor, MA to Gloucester, MA
46.7 NM 7 waypoints

Navigation Responsibility

This forecast is for informational purposes only. You are responsible for your own navigation and safety at sea. Always verify weather conditions with official sources, maintain a proper watch, and exercise prudent seamanship. Do not rely solely on this forecast for critical navigation decisions. See our Terms of Service for full details.