FZUS52 KJAX 160857 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 457 AM EDT Fri Oct 16 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. AMZ400-170000- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 457 AM EDT Fri Oct 16 2026 .SYNOPSIS... High pressure ridge over area will weaken Today, as a strong cold front approaches from the northwest. This front will move southeast across the area Tonight, with strong high pressure building behind it. A period of elevated winds and building seas will be expected from Saturday through much of next week, with gales likely beginning on Saturday and possibly continuing into Monday night. .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. $$ AMZ450-452-454-170000- 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- 457 AM EDT Fri Oct 16 2026 ...GALE WATCH IN EFFECT FROM SATURDAY MORNING THROUGH LATE MONDAY NIGHT... .TODAY...Northwest winds around 5 knots, becoming southeast 5 to 10 knots this afternoon. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms this afternoon. .TONIGHT...South winds 10 to 15 knots, becoming west 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 3 seconds and southeast 2 feet at 6 seconds. Intracoastal waters choppy. A slight chance of showers after midnight. .SATURDAY...North winds 20 to 25 knots, increasing to 25 to 30 knots with gusts up to 40 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 8 feet, occasionally to 10 feet in the afternoon. Wave Detail: North 5 feet at 5 seconds and east 3 feet at 8 seconds, becoming north 8 feet at 7 seconds. Intracoastal waters very rough. A chance of showers, mainly in the morning. .SATURDAY NIGHT...Northeast winds 30 to 35 knots. Seas 8 to 11 feet, occasionally to 14 feet, building to 9 to 13 feet, occasionally to 17 feet after midnight. Wave Detail: North 11 feet at 7 seconds, becoming northeast 12 feet at 8 seconds. Intracoastal waters extremely rough. A slight chance of showers in the evening. .SUNDAY AND SUNDAY NIGHT...Northeast winds 25 to 35 knots. Seas 10 to 14 feet, occasionally to 18 feet. Wave Detail: Northeast 14 feet at 10 seconds. Intracoastal waters extremely rough. A chance of showers. .MONDAY...Northeast winds 25 to 30 knots. Seas 10 to 14 feet, occasionally to 18 feet. Wave Detail: Northeast 13 feet at 11 seconds and northeast 6 feet at 7 seconds. Intracoastal waters very rough. A slight chance of showers in the morning, then a chance of showers in the afternoon. .TUESDAY...North winds 25 to 30 knots, becoming northeast 20 to 25 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 10 feet, occasionally to 13 feet after midnight. Intracoastal waters very rough. A slight chance of showers. Winds and waves higher in and near thunderstorms. $$ AMZ470-472-474-170000- 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 fromSt. Augustine to Flagler Beach FL from 20 to 60 NM- 457 AM EDT Fri Oct 16 2026 ...GALE WATCH IN EFFECT FROM SATURDAY MORNING THROUGH LATE MONDAY NIGHT... .TODAY...West winds around 5 knots, becoming southeast this afternoon. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds. A chance of showers this morning, then a slight chance of showers and thunderstorms this afternoon. .TONIGHT...South winds 10 to 15 knots, becoming west 15 to 20 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southwest 3 feet at 4 seconds and southeast 2 feet at 7 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. .SATURDAY...North winds 20 to 25 knots, increasing to 25 to 30 knots with gusts up to 40 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet, building to 7 to 10 feet, occasionally to 13 feet in the afternoon. Wave Detail: Northwest 6 feet at 5 seconds and east 2 feet at 9 seconds, becoming north 9 feet at 7 seconds and east 9 feet at 9 seconds. A chance of showers. .SATURDAY NIGHT...Northeast winds 30 to 35 knots. Seas 9 to 12 feet, occasionally to 15 feet, building to 11 to 14 feet, occasionally to 18 feet after midnight. Wave Detail: North 12 feet at 8 seconds, becoming northeast 13 feet at 9 seconds. A slight chance of showers in the evening. .SUNDAY...Northeast winds 30 to 35 knots. Seas 12 to 14 feet, occasionally to 18 feet. Wave Detail: Northeast 14 feet at 10 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 12 to 15 feet, occasionally to 19 feet. Wave Detail: Northeast 15 feet at 10 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. .MONDAY...Northeast winds 25 to 30 knots. Seas 12 to 15 feet, occasionally to 19 feet. A chance of showers through the day, then a slight chance of showers through the night. .TUESDAY...North winds 25 to 30 knots, becoming northeast 20 to 25 knots. Seas 10 to 13 feet, occasionally to 17 feet, subsiding to 8 to 11 feet, occasionally to 14 feet. A slight chance of showers. Winds and seas higher in and near thunderstorms. $$