St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Charleston Harbor, SC map preview
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St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Charleston Harbor, SC Marine Weather Route Forecast

Strategic Georgia bypass. Stays offshore of the complex and shallow Georgia sounds. Watch for commercial traffic entering the Savannah River.

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 St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Charleston Harbor, SC.

Generated: 2026-07-28T11:13:21.334845+00:00 • Distance: 151.6 NM • Departure: 2026-07-28T08:00:00-04:00 • Speed: 6 knots
Time Wind Waves Ocean Current Air/Water
2026-07-28T12:00:00+00:00 3.8876904000000003 kts 0.36 m 0.0 kts E E 25.6 / 30.4 °C
2026-07-28T16:00:00+00:00 2.8077764000000003 kts 0.4 m 0.3 kts SE SE 28.7 / 30.2 °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 20 kts with waves 1.2 to 3.5 ft with period of 4 to 8 seconds. Overall, wind and waves mostly aligned or partially aligned. Wind angles: 25% following, 75% reaching. Sea state: 50% aligned, 38% cross-seas, 12% opposed.

Historical Forecasts Download GPX File

Related Routes

St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Ft. Pierce Inlet, FL
207.7 NM 6 waypoints
St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Government Cut, Miami, FL
315.8 NM 9 waypoints
St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Grand Cay, Abacos, Bahamas
304.4 NM 10 waypoints
St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Marsh Harbour, Abacos, Bahamas
354.2 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.