Charleston Harbor, SC to Winyah Bay, Georgetown, SC map preview
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Charleston Harbor, SC to Winyah Bay, Georgetown, SC Marine Weather Route Forecast

Standard offshore leg between Charleston and Georgetown, SC.

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 Winyah Bay, Georgetown, SC.

Generated: 2026-10-20T10:33:16.164110+00:00 • Distance: 56.2 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 6.8034582 kts 0.92 m 0.6 kts SSW SSW 10.9 / 21.6 °C
2026-10-20T16:00:00+00:00 14.9028132 kts 1.4 m 0.5 kts WSW WSW 18.2 / 21.8 °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 7 to 15 kts with waves 3.0 to 4.6 ft with period of 8 to 9 seconds. Overall, periods of cross-seas may create some roll. Wind angles: 25% reaching, 75% 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°75%
ReachingClose Hauled45–80°25%
ReachingBeam Reach80–110°0%
ReachingBroad Reach110–145°0%
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

Winyah Bay, Georgetown, SC to Charleston Harbor, SC
56.2 NM 11 waypoints
Cape Fear Inlet, Bald Head Island, NC to Winyah Bay, Georgetown, SC
77.8 NM 10 waypoints
Little River Inlet, Myrtle Beach, SC to Winyah Bay, Georgetown, SC
52.8 NM 7 waypoints
Charleston Harbor, SC to Delaware Bay, Lewes, DE
505.2 NM 10 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.