Coastal Waters Forecast for Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM (AMZ450) (Text-Only)
NWS Forecast for: Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM (AMZ450)
Issued by: National Weather Service Jacksonville, FL
Last Update: 110 AM EDT Fri Oct 16 2026




Rest Of Tonight: Southeast winds 5 to 10 knots, becoming south. Seas around 2 feet. Wave detail: east 2 feet at 7 seconds. Intracoastal waters light chop.

Friday: Northwest winds around 5 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave detail: east 2 feet at 7 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the afternoon.

Friday Night: South winds 10 to 15 knots, becoming west 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave detail: south 2 feet at 3 seconds and southeast 2 feet at 6 seconds. Intracoastal waters choppy. A slight chance of showers after midnight.

Saturday: North winds 20 to 25 knots, increasing to 25 to 30 knots with gusts up to 40 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 8 feet, occasionally to 10 feet in the afternoon. Wave detail: north 5 feet at 5 seconds and east 3 feet at 8 seconds, becoming north 8 feet at 7 seconds. Intracoastal waters very rough. A chance of showers, mainly in the morning.

Saturday Night: Northeast winds 30 to 35 knots. Seas 8 to 11 feet, occasionally to 14 feet, building to 9 to 13 feet, occasionally to 17 feet after midnight. Wave detail: north 11 feet at 7 seconds, becoming northeast 12 feet at 8 seconds. Intracoastal waters extremely rough. A slight chance of showers in the evening.

Sunday And Sunday Night: Northeast winds 25 to 35 knots. Seas 10 to 14 feet, occasionally to 18 feet. Wave detail: northeast 14 feet at 10 seconds. Intracoastal waters extremely rough. A chance of showers.

Monday: Northeast winds 25 to 30 knots. Seas 10 to 14 feet, occasionally to 18 feet. Intracoastal waters very rough. A slight chance of showers in the morning, then a chance of showers in the afternoon. A slight chance of showers in the evening.

Tuesday: North winds 25 to 30 knots, becoming northeast 20 to 25 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 10 feet, occasionally to 13 feet after midnight. Intracoastal waters very rough. A slight chance of showers.

winds and waves higher in and near thunderstorms.







Zone Forecast: Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM (AMZ450)

Visit your local NWS office at: https://www.weather.gov/jax