Delaware Bay, Lewes, DE to Charleston Harbor, SC map preview
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Delaware Bay, Lewes, DE 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 Delaware Bay, Lewes, DE to Charleston Harbor, SC.

Generated: 2026-10-20T10:33:08.473621+00:00 • Distance: 505.2 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 11.2851013 kts 1.18 m 0.9 kts SSE SSE 12.7 / 17.4 °C
2026-10-20T16:00:00+00:00 23.596120900000003 kts 2.36 m 0.5 kts SSW SSW 16.3 / 17.9 °C
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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 12.7 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: 57% following, 43% 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°30%
FollowingRun145–180°57%

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 Delaware Bay, Lewes, DE
505.2 NM 10 waypoints
Delaware Bay, Lewes, DE to Absecon Inlet, Atlantic City, NJ
49.8 NM 7 waypoints
Delaware Bay, Lewes, DE to Beaufort Inlet, NC
316.4 NM 13 waypoints
Delaware Bay, Lewes, DE to Cape May Inlet, NJ
15.6 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.