FZUS52 KJAX 251736 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 136 PM EDT Sat Apr 25 2026 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. AMZ400-260845- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 136 PM EDT Sat Apr 25 2026 .SYNOPSIS... High pressure situated offshore of the southeastern states today will continue to gradually weaken as it shifts eastward. A cold front will then enter the southeastern states later today, possibly helping to develop scattered late afternoon and evening showers and isolated thunderstorms across our local waters this weekend. This cold front will cross our local waters on Sunday night, with low pressure along this front strengthening somewhat off the Carolina coast by Monday. Winds will shift to northerly on Sunday night and then northeasterly by Monday morning, with Caution conditions likely due to breezy speeds and building seas through Monday evening. Weak high pressure will then briefly build over our local waters on Tuesday and Wednesday. Another cold front will then approach our area from the northwest late next week. .GULF STREAM... The approximate location of the west wall of the Gulf Stream as of Apr 25, 2026 at 0000 UTC... 50 nautical miles east of Flagler Beach. 53 nautical miles east of Saint Augustine Beach. 64 nautical miles east southeast of Jacksonville Beach. 76 nautical miles east southeast of St Simons Island. This data derived from NCEP Global RTOFS model. $$ AMZ450-452-454-260845- 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- 136 PM EDT Sat Apr 25 2026 .TONIGHT...South winds 10 to 15 knots, becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop. A slight chance of thunderstorms this evening. A slight chance of showers. .SUNDAY...Southwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at 6 seconds. Intracoastal waters light chop. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. .SUNDAY NIGHT...South winds around 5 knots, becoming north 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 7 seconds. Intracoastal waters choppy. A chance of showers and thunderstorms, mainly in the evening. .MONDAY...Northeast winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 4 feet at 6 seconds. Intracoastal waters choppy. A slight chance of showers and thunderstorms. .MONDAY NIGHT AND TUESDAY...East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 7 seconds. Intracoastal waters a moderate chop. .TUESDAY NIGHT...Southeast winds 5 to 10 knots, becoming south after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 9 seconds. Intracoastal waters light chop. .WEDNESDAY...South winds 10 to 15 knots, becoming southwest. Seas 2 to 4 feet, occasionally to 5 feet. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms through the night. A slight chance of showers after midnight. .THURSDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Intracoastal waters light chop. A chance of showers through the day. A chance of thunderstorms in the afternoon, then a slight chance of showers in the evening. Winds and waves higher in and near thunderstorms. $$ AMZ470-472-474-260845- 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- 136 PM EDT Sat Apr 25 2026 .TONIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 4 seconds. A slight chance of showers and thunderstorms. .SUNDAY...West winds 5 to 10 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon. .SUNDAY NIGHT...South winds 5 to 10 knots, becoming north 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds. A chance of showers and thunderstorms. .MONDAY...Northeast winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 6 seconds. A slight chance of showers and thunderstorms. .MONDAY NIGHT AND TUESDAY...East winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 8 seconds. .TUESDAY NIGHT...South winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 9 seconds. .WEDNESDAY...South winds 10 to 15 knots, becoming southwest. Seas 3 to 5 feet, occasionally to 6 feet. A slight chance of showers and thunderstorms through the night. A slight chance of showers after midnight. .THURSDAY...North winds 10 to 15 knots, becoming northeast. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. A slight chance of showers and thunderstorms in the evening. Winds and seas higher in and near thunderstorms. $$