Port Royal Sound, Hilton Head Island, SC to Charleston Harbor, SC map preview
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Port Royal Sound, Hilton Head Island, SC to Charleston Harbor, SC Marine Weather Route Forecast

Easy coastline run; minimal hazards.

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 Port Royal Sound, Hilton Head Island, SC to Charleston Harbor, SC.

Generated: 2026-09-05T10:25:10.527340+00:00 • Distance: 73.3 NM • Departure: 2026-09-05T08:00:00-04:00 • Speed: 6 knots
Time Wind Waves Ocean Current Air/Water
2026-09-05T12:00:00+00:00 2.6457893 kts 0.36 m 0.2 kts E E 25.8 / 29.9 °C
2026-09-05T16:00:00+00:00 3.7257033 kts 0.6 m 0.3 kts NE NE 28.1 / 29.2 °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 3 to 8 kts with waves 1.2 to 2.0 ft with period of 4 to 6 seconds. Overall, periods of cross-seas may create some roll. Wind angles: 20% following, 80% reaching. Sea state: 80% cross-seas, 20% opposed.

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°0%
ReachingBroad Reach110–145°80%
FollowingRun145–180°20%

Sea State & Wave Motion

Sea StateWind vs. WavesBoat MotionPortion of Passage
AlignedWaves run with the windSteady, organized0%
Cross SeasWaves cross the windRolling80%
OpposedWaves against the windChoppy, confused20%
Historical Forecasts Download GPX File

Related Routes

Charleston Harbor, SC to Port Royal Sound, Hilton Head Island, SC
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Cape Fear Inlet, Bald Head Island, NC to Charleston Harbor, SC
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Port Royal Sound, Hilton Head Island, SC to Calibogue Sound, Hilton Head Island, SC
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Port Royal Sound, Hilton Head Island, SC to St. Mary's Inlet, GA /FL and Fernandina Beach, FL
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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.