| 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: 656 PM EDT Tue Sep 22 2026 | |
Tonight: Northeast winds around 10 knots. Seas 2 to 3 feet. wave detail: east 3 feet at 7 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms this evening, then a chance of showers and thunderstorms after midnight. Wednesday: Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet in the afternoon. Wave detail: northeast 4 feet at 7 seconds, becoming northeast 5 feet at 5 seconds. Intracoastal waters rough. A chance of thunderstorms. Showers likely, mainly in the morning. Wednesday Night: Northeast winds 20 to 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave detail: northeast 7 feet at 7 seconds. Intracoastal waters rough. Showers likely with a chance of thunderstorms. Thursday: North winds 25 to 30 knots. Seas 6 to 9 feet, occasionally to 11 feet, building to 8 to 11 feet, occasionally to 14 feet in the afternoon. Wave detail: northeast 9 feet at 7 seconds, becoming northeast 11 feet at 8 seconds. Intracoastal waters very rough. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Thursday Night: Northeast winds 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet. Wave detail: northeast 12 feet at 9 seconds. Intracoastal waters very rough. A chance of showers with a slight chance of thunderstorms. Friday: North winds 20 to 25 knots. Seas 8 to 11 feet, occasionally to 14 feet. Wave detail: northeast 11 feet at 12 seconds. Intracoastal waters rough. Friday Night: North winds 15 to 20 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding to 6 to 8 feet, occasionally to 10 feet after midnight. Intracoastal waters choppy. Saturday: North winds 15 to 20 knots, becoming northeast 5 to 10 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet after midnight. Intracoastal waters choppy. Sunday: Northeast winds 5 to 10 knots, becoming south. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to 5 feet after midnight. Intracoastal waters light chop. 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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