Cape May Inlet, NJ to Charleston Harbor, SC map preview
← Back to Maritime Weather Routing Library

Cape May Inlet, NJ to Charleston Harbor, SC Marine Weather Route Forecast

Big offshore leg around Cape Hatteras; requires stable weather window.

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 Cape May Inlet, NJ to Charleston Harbor, SC.

Generated: 2026-10-20T10:31:03.548102+00:00 • Distance: 505.7 NM • Departure: 2026-10-20T08:00:00-04:00 • Speed: 6 knots
Time Wind Waves Ocean Current Air/Water
2026-10-20T12:00:00+00:00 16.198710000000002 kts 1.38 m 0.8 kts SE SE 12.7 / 17.2 °C
2026-10-20T16:00:00+00:00 18.8444993 kts 2.36 m 0.5 kts SSW SSW 16.4 / 17.9 °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 6 to 30 kts with waves 2.5 to 12.9 ft with period of 5 to 10 seconds. Overall, periods of cross-seas may create some roll. Caution: peak winds reach 30 kts — conditions may be demanding regardless of point of sail. Wind angles: 61% following, 39% reaching. Sea state: 17% aligned, 83% cross-seas.

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°13%
ReachingBroad Reach110–145°26%
FollowingRun145–180°61%

Sea State & Wave Motion

Sea StateWind vs. WavesBoat MotionPortion of Passage
AlignedWaves run with the windSteady, organized17%
Cross SeasWaves cross the windRolling83%
OpposedWaves against the windChoppy, confused0%
Historical Forecasts Download GPX File

Related Routes

Charleston Harbor, SC to Cape May Inlet, NJ
507.1 NM 8 waypoints
Cape Fear Inlet, Bald Head Island, NC to Charleston Harbor, SC
119.3 NM 9 waypoints
Cape May Inlet, NJ to Absecon Inlet, Atlantic City, NJ
34.5 NM 8 waypoints
Cape May Inlet, NJ to Barnegat Inlet, NJ
65.8 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.