St. Simons Sound, Brunswick, GA to St. Mary's Inlet, GA /FL and Fernandina Beach, FL map preview
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St. Simons Sound, Brunswick, GA to St. Mary's Inlet, GA /FL and Fernandina Beach, FL Marine Weather Route Forecast

Close-to-shore coastal hop; watch for shoals near inlets.

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. Simons Sound, Brunswick, GA to St. Mary's Inlet, GA /FL and Fernandina Beach, FL.

Generated: 2026-07-21T11:02:28.846500+00:00 • Distance: 27.8 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 12.041041100000001 kts 0.78 m 0.3 kts NE NE 29.6 / 31.2 °C
2026-07-21T16:00:00+00:00 16.1447143 kts 1.0 m 0.4 kts NNW NNW 28.7 / 30.5 °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 16 kts with waves 2.6 to 3.3 ft with period of 4 seconds. Overall, wind and waves mostly aligned or partially aligned. Wind angles: 67% reaching, 33% on the nose. Sea state: 100% aligned.

Historical Forecasts Download GPX File

Related Routes

St. Mary's Inlet, GA /FL and Fernandina Beach, FL to St Simons Sound, Brunswick, GA
27.8 NM 7 waypoints
Charleston Harbor, SC to St. Mary's Inlet, GA /FL and Fernandina Beach, FL
151.6 NM 7 waypoints
Marsh Harbour, Abacos, Bahamas to St. Mary's Inlet, GA /FL and Fernandina Beach, FL
354.2 NM 7 waypoints
Norfolk / Hampton, VA to St. Mary's Inlet, GA /FL and Fernandina Beach, FL
532.1 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.