| 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 AM EDT Tue Sep 22 2026 |  |
Rest Of Tonight: Southwest winds around 5 knots. Seas 2 to 3 feet. Wave detail: east 2 feet at 8 seconds. Intracoastal waters smooth. A slight chance of showers and thunderstorms. Tuesday: Northeast winds 5 to 10 knots. 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: Northeast winds around 5 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 showers after midnight. Wednesday: Northeast winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 4 feet at 5 seconds and east 2 feet at 8 seconds. Intracoastal waters choppy. Showers likely with a slight chance of thunderstorms. Wednesday Night: Northeast winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: northeast 6 feet at 6 seconds. Intracoastal waters rough. Showers likely. A chance of thunderstorms, mainly in the evening. Thursday: North winds 20 to 25 knots, increasing to 25 to 30 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet, building to 6 to 9 feet, occasionally to 11 feet in the afternoon. Wave detail: northeast 7 feet at 7 seconds, becoming northeast 9 feet at 7 seconds. Intracoastal waters very rough. Showers with a slight chance of thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Thursday Night: North winds 25 to 30 knots. Seas 7 to 10 feet, occasionally to 13 feet. Intracoastal waters very rough. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Friday: North winds 20 to 25 knots, becoming northeast 15 to 20 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding to 5 to 7 feet, occasionally to 9 feet after midnight. Intracoastal waters rough. A chance of showers through the day. Saturday: North winds 15 to 20 knots, becoming northeast 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet. Intracoastal waters choppy. 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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