| 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: 225 PM EDT Mon Sep 21 2026 | |
| Rest Of Today: Northeast winds 5 to 10 knots. Seas around 2 feet. Wave detail: northeast 2 feet at 8 seconds and east 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms. Tonight: East winds 5 to 10 knots, becoming southeast after midnight. Seas around 2 feet. Wave detail: northeast 2 feet at 8 seconds and east 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Tuesday: North winds 5 to 10 knots, becoming northeast in the afternoon. Seas around 2 feet. Wave detail: east 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Tuesday Night: East winds 5 to 10 knots, becoming north after midnight. Seas around 2 feet. Wave detail: east 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Wednesday: Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: northeast 3 feet at 4 seconds and northeast 2 feet at 7 seconds. Intracoastal waters a moderate chop. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Wednesday Night: Northeast winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: northeast 5 feet at 6 seconds. Intracoastal waters rough. Showers likely. A chance of thunderstorms, mainly in the evening. Thursday: Northeast winds 25 to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet, building to 6 to 9 feet, occasionally to 11 feet. Intracoastal waters very rough. Showers likely with a slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. A chance of showers through the night. A slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Friday: Northeast winds 20 to 25 knots, diminishing to 15 to 20 knots. Seas 6 to 9 feet, occasionally to 11 feet, subsiding to 5 to 7 feet, occasionally to 9 feet after midnight. Intracoastal waters rough. A chance of showers, mainly in the morning. winds and waves higher in and near thunderstorms. | |
| Zone Forecast: Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM (AMZ450) | |
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