St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Government Cut, Miami, FL map preview
← Back to Maritime Weather Routing Library

St. Mary's Inlet, GA /FL and Fernandina Beach, FL to Government Cut, Miami, FL Marine Weather Route Forecast

Extended offshore run; experienced crews only with favorable forecast.

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 Government Cut, Miami, FL.

Generated: 2026-07-21T11:11:42.247271+00:00 • Distance: 315.8 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 9.233264700000001 kts 0.9 m 0.2 kts N N 27.3 / 30.3 °C
2026-07-21T16:00:00+00:00 14.5248433 kts 0.9 m 0.8 kts NNW NNW 28.4 / 29.6 °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 8 to 21 kts with waves 1.0 to 3.4 ft with period of 4 to 6 seconds. Overall, wind and waves mostly aligned or partially aligned. Wind angles: 7% following, 33% reaching, 60% on the nose. Sea state: 60% aligned, 40% cross-seas.

Historical Forecasts Download GPX File

Related Routes

Beaufort Inlet, NC to Government Cut, Miami, FL
598.6 NM 10 waypoints
Bimini, Bahamas to Government Cut, Miami, FL
42.9 NM 6 waypoints
Charleston Harbor, SC to Government Cut, Miami, FL
425.8 NM 9 waypoints
Ft. Pierce Inlet, FL to Government Cut, Miami, FL
109.7 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.