


Coastal Waters Forecast
Issued by NWS Jacksonville, FL
Issued by NWS Jacksonville, FL
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876 FZUS52 KJAX 140443 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 1243 AM EDT Thu Aug 14 2025 Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach FL out to 60 nm. Seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 1/10 of the waves. AMZ400-141945- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 1243 AM EDT Thu Aug 14 2025 .SYNOPSIS... High pressure ridge centered across the Florida peninsula will drift southward through Friday as a trough develops over the southeastern states. Prevailing southwest to south winds are forecast as this trough settles over our local waters on Friday, with prevailing onshore winds then developing by late Saturday and Saturday night as the trough potentially organizes into a weak low pressure center along the southeastern seaboard. Scattered afternoon showers and thunderstorms are expected over our nearshore local waters through Friday, with an increase in coverage possible during the upcoming weekend. Seas will begin to increase early next week as long period swells start to arrive from Hurricane Erin. .GULF STREAM... The approximate location of the west wall of the Gulf Stream as of Aug 12, 2025 at 1200 UTC... 50 nautical miles east northeast of Flagler Beach. 50 nautical miles east northeast of Saint Augustine Beach. 47 nautical miles east of Jacksonville Beach. 53 nautical miles east of St Simons Island. This data courtesy of the Naval Oceanographic Office. $$ AMZ450-452-454-141945- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 1243 AM EDT Thu Aug 14 2025 .REST OF TONIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds. Intracoastal waters a moderate chop. .THURSDAY...Southwest winds 10 to 15 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at 5 seconds and east 2 feet at 9 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. .THURSDAY NIGHT...South winds 10 to 15 knots, becoming west after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the evening. .FRIDAY...West winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...South winds 5 to 10 knots, becoming southwest after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters light chop. A chance of showers. A chance of thunderstorms, mainly in the evening. .SATURDAY...Northwest winds around 5 knots, becoming east in the afternoon. Seas around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. .SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. Showers likely with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. .SUNDAY...Northeast winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. A chance of thunderstorms in the evening. A chance of showers through the night. A slight chance of thunderstorms after midnight. .MONDAY...Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Intracoastal waters a moderate chop. A chance of showers and thunderstorms . Winds and waves higher in and near thunderstorms. $$ AMZ470-472-474-141945- Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- 1243 AM EDT Thu Aug 14 2025 .REST OF TONIGHT...Southwest winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: South 3 feet at 4 seconds and east 2 feet at 9 seconds. A slight chance of showers and thunderstorms. .THURSDAY...Southwest winds 10 to 15 knots, becoming south in the afternoon. Seas around 3 feet. Wave Detail: South 2 feet at 4 seconds and east 2 feet at 9 seconds. A slight chance of showers and thunderstorms. .THURSDAY NIGHT...South winds around 15 knots, becoming southwest after midnight. Seas around 3 feet. Wave Detail: South 3 feet at 4 seconds and east 2 feet at 9 seconds. A chance of showers and thunderstorms. .FRIDAY...West winds 5 to 10 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and east 2 feet at 9 seconds. A chance of showers and thunderstorms, mainly in the morning. .FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 2 feet at 9 seconds. A chance of showers and thunderstorms. .SATURDAY AND SATURDAY NIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds. Showers likely with a chance of thunderstorms. .SUNDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. A chance of thunderstorms. .MONDAY...Northeast winds around 10 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet after midnight. A chance of showers. A chance of thunderstorms . Winds and seas higher in and near thunderstorms. $$