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

Generated: 2026-07-21T11:15:11.756940+00:00 • Distance: 505.2 NM • Departure: 2026-07-21T08:00:00-04:00 • Speed: 6 knots
Time Wind Waves Ocean Current Air/Water
2026-07-21T12:00:00+00:00 9.719226 kts 0.78 m 0.1 kts N N 29.2 / 30.4 °C
2026-07-21T16:00:00+00:00 17.386615400000004 kts 1.1 m 0.8 kts NNE NNE 29.4 / 29.1 °C
Locked forecast rows are available to signed-in users.

Route Passage Summary & Sea State

Expect a majority of reaching conditions with steady motion. Winds range from 9 to 24 kts with waves 2.3 to 6.6 ft with period of 4 to 6 seconds. Overall, wind and waves mostly aligned or partially aligned. Wind angles: 17% following, 83% reaching. Sea state: 83% aligned, 13% cross-seas, 4% opposed.

Historical Forecasts Download GPX File

Related Routes

Delaware Bay, Lewes, DE to Charleston Harbor, SC
505.2 NM 10 waypoints
Absecon Inlet, Atlantic City, NJ to Delaware Bay, Lewes, DE
49.8 NM 7 waypoints
Beaufort Inlet, NC to Delaware Bay, Lewes, DE
315.2 NM 13 waypoints
Cape May Inlet, NJ to Delaware Bay, Lewes, DE
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.