FZUS52 KJAX 160200 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 1000 PM EDT Thu Oct 15 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. AMZ400-161700- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 1000 PM EDT Thu Oct 15 2026 .SYNOPSIS... High pressure will be over the area Today, then weaken as it shifts east northeast of the area Tonight into Friday. A cold front will move southeast across the area Friday night. Strong high pressure will build behind the front. A surge of north winds will move south down the coastal waters behind the front, with elevated winds from late Friday night through much of next week, with potential for Gale force winds late Saturday into Monday. .GULF STREAM... The approximate location of the west wall of the Gulf Stream as of Oct 15, 2026 at 0000 UTC... 50 nautical miles east of Flagler Beach. 58 nautical miles east of Saint Augustine Beach. 70 nautical miles east southeast of Jacksonville Beach. 68 nautical miles east southeast of St Simons Island. This data derived from NCEP Global RTOFS model. $$ AMZ450-452-454-161700- 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- 1000 PM EDT Thu Oct 15 2026 .REST OF TONIGHT...Southeast winds 5 to 10 knots, becoming south. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters light chop. .FRIDAY...West winds around 5 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters light chop. .FRIDAY NIGHT...South winds around 10 knots, becoming west 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and east 2 feet at 8 seconds. Intracoastal waters choppy. A slight chance of showers after midnight. .SATURDAY...North winds 25 to 30 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 8 feet, occasionally to 10 feet in the afternoon. Wave Detail: Northwest 5 feet at 5 seconds and east 2 feet at 9 seconds, becoming north 8 feet at 8 seconds. Intracoastal waters very rough. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SATURDAY NIGHT...Northeast winds 30 to 35 knots. Seas 7 to 10 feet, occasionally to 13 feet, building to 9 to 13 feet, occasionally to 17 feet after midnight. Wave Detail: Northeast 10 feet at 7 seconds and north 2 feet at 8 seconds, becoming northeast 12 feet at 8 seconds. Intracoastal waters extremely rough. .SUNDAY...Northeast winds 25 to 30 knots, increasing to 30 to 35 knots in the afternoon. Seas 9 to 13 feet, occasionally to 17 feet. Wave Detail: Northeast 13 feet at 9 seconds. Intracoastal waters extremely rough. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SUNDAY NIGHT...Northeast winds 30 to 35 knots with gusts up to 45 knots. Seas 11 to 14 feet, occasionally to 18 feet. Intracoastal waters extremely rough. A chance of showers, mainly in the evening. .MONDAY...Northeast winds 25 to 35 knots. Seas 10 to 14 feet, occasionally to 18 feet. Intracoastal waters extremely rough. A chance of showers through the day, then a slight chance of showers through the night. .TUESDAY...Northeast winds 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 8 to 10 feet, occasionally to 13 feet after midnight. Intracoastal waters very rough. A chance of showers through the day, then a slightchance of showers through the night. $$ AMZ470-472-474-161700- 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- 1000 PM EDT Thu Oct 15 2026 .REST OF TONIGHT...Southeast winds 5 to 10 knots, becoming south. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds. .FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds. A slight chance of showers in the afternoon. .FRIDAY NIGHT...South winds 10 to 15 knots, becoming west 20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southwest 3 feet at 4 seconds and east 2 feet at 9 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SATURDAY...North winds 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet, building to 6 to 9 feet, occasionally to 11 feet in the afternoon. Wave Detail: Northwest 6 feet at 6 seconds and east 2 feet at 9 seconds, becoming north 9 feet at 7 seconds and east 9 feet at 9 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers in the afternoon. .SATURDAY NIGHT...Northeast winds 30 to 35 knots. Seas 9 to 12 feet, occasionally to 15 feet, building to 11 to 13 feet, occasionally to 17 feet after midnight. Wave Detail: North 12 feet at 8 seconds, becoming northeast 13 feet at 9 seconds and north 2 feet at 8 seconds. A slight chance of showers in the evening. .SUNDAY...Northeast winds 30 to 35 knots with gusts up to 45 knots. Seas 12 to 13 feet, occasionally to 17 feet. Wave Detail: Northeast 13 feet at 9 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SUNDAY NIGHT...Northeast winds 30 to 35 knots with gusts up to 45 knots. Seas 13 to 15 feet, occasionally to 19 feet. A slight chance of thunderstorms. A chance of showers, mainly in the evening. .MONDAY...Northeast winds around 30 knots, becoming 25 to 35 knots. Seas 11 to 14 feet, occasionally to 18 feet. A chance of showers . .TUESDAY...Northeast winds 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet. A chance of showers. Winds and seas higher in and near thunderstorms. $$