Onset, MA to Wellfleet, Cape Cod, MA map preview
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Onset, MA to Wellfleet, Cape Cod, MA Marine Weather Route Forecast

Through the Cape Cod Canal and Cape Cod Bay. Review strong Canal currents before making passage.

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 Onset, MA to Wellfleet, Cape Cod, MA.

Generated: 2026-09-04T10:51:51.038281+00:00 • Distance: 33.0 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 3.0237591999999998 kts 0.22 m 0.1 kts W W 20.4 / 23.1 °C
2026-09-04T16:00:00+00:00 5.4535657 kts 0.28 m 0.2 kts SSW SSW 22.2 / 21.6 °C
Locked forecast rows are available to signed-in users.

Route Passage Summary & Sea State

Expect significant time on the nose, expect a more demanding trip. Winds range from 3 to 5 kts with waves 0.7 to 1.3 ft with period of 4 to 6 seconds. Overall, periods of cross-seas may create some roll. Wind angles: 33% reaching, 67% on the nose. Sea state: 100% cross-seas.

More Detail

Points of Sail

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

Sea State & Wave Motion

Sea StateWind vs. WavesBoat MotionPortion of Passage
AlignedWaves run with the windSteady, organized0%
Cross SeasWaves cross the windRolling100%
OpposedWaves against the windChoppy, confused0%
Historical Forecasts Download GPX File

Related Routes

Wellfleet, Cape Cod, MA to Onset, MA
33 NM 23 waypoints
Onset, MA to Cuttyhunk Island, MA
23.3 NM 12 waypoints
Cape Cod Canal, Buzzards Bay, MA to Nantucket, MA
42.2 NM 12 waypoints
Cape Cod Canal, MA to Gloucester, MA
50.2 NM 5 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.