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: 2026-07-21T11:04:19.164241+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 8.639312 kts 0.42 m 0.4 kts SE SE 25.1 / 25.6 °C
2026-07-21T16:00:00+00:00 14.6868304 kts 0.96 m 0.7 kts NNE NNE 23.9 / 23.5 °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 6 to 30 kts with waves 1.4 to 7.0 ft with period of 4 to 6 seconds. Overall, wind and waves mostly aligned or partially aligned. Caution: peak winds reach 30 kts — conditions may be demanding regardless of point of sail. Wind angles: 4% following, 43% reaching, 52% on the nose. Sea state: 74% aligned, 22% cross-seas, 4% opposed.

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.