FZUS52 KJAX 231633 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 1133 AM EST Fri Jan 23 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. AMZ400-240745- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 1133 AM EST Fri Jan 23 2026 .SYNOPSIS... Arctic high pressure will build northwest of the area this afternoon and push a frontal boundary southward through the local waters tonight. Dense sea fog development will be possible across the Northeast Florida nearshore waters this evening. Northeast winds briefly surge in the wake of this frontal passage on Saturday with Small Craft Advisory conditions expected. Meanwhile, a winter storm developing over the deep South on Saturday and Saturday night will shift northeast, lifting a warm front northward across our local waters on Saturday night. Winds will shift to south and then southwest on Sunday ahead of another cold front, which could be accompanied by a few thunderstorms on Sunday night. Arctic high pressure will then build into the southeast states in the wake of this cold frontal passage early next week, continuing Small Craft Advisory conditions into early next week as breezy northwest winds shift to north while strengthening further on Monday night. .GULF STREAM... The approximate location of the west wall of the Gulf Stream as of Jan 23, 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. 68 nautical miles east southeast of St Simons Island. This data derived from NCEP Global RTOFS model. $$ AMZ450-240745- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- 1133 AM EST Fri Jan 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY EVENING... .REST OF TODAY...North winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 10 seconds. Intracoastal waters light chop. .TONIGHT...Northeast winds 10 to 15 knots, increasing to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 5 seconds and east 4 feet at 10 seconds. Intracoastal waters choppy. Areas of fog in the evening. Patchy fog after midnight with visibility 1 NM or less. .SATURDAY...Northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 7 seconds and east 3 feet at 10 seconds. Intracoastal waters rough. A slight chance of showers in the afternoon. .SATURDAY NIGHT...Northeast winds 20 to 25 knots, diminishing to 5 to 10 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 7 seconds and east 6 feet at 10 seconds. Intracoastal waters rough. A chance of showers, mainly in the evening. .SUNDAY...Southeast winds 5 to 10 knots, becoming south 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 10 seconds and east 2 feet at 5 seconds. Intracoastal waters a moderate chop. .SUNDAY NIGHT...Southwest winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 10 seconds and south 4 feet at 5 seconds. Intracoastal waters choppy. A chance of showers in the evening, then showers likely after midnight. .MONDAY...Northwest winds 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters rough. .TUESDAY...Northwest winds 15 to 20 knots, becoming west 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2 to 3 feet. Intracoastal waters choppy. $$ AMZ470-240745- Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- 1133 AM EST Fri Jan 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE TONIGHT THROUGH LATE SUNDAY NIGHT... .REST OF TODAY...North winds around 10 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 10 seconds. .TONIGHT...Northeast winds 10 to 15 knots, increasing to 20 knots after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 5 seconds and east 4 feet at 10 seconds. Patchy fog after midnight with visibility 1 NM or less. .SATURDAY...Northeast winds 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at 7 seconds and east 4 feet at 10 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SATURDAY NIGHT...Northeast winds 20 knots, becoming southeast around 10 knots after midnight. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. .SUNDAY...South winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 10 seconds. .SUNDAY NIGHT...Southwest winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 10 seconds and south 5 feet at 7 seconds. A chance of showers in the evening, then showers likely after midnight. .MONDAY...Northwest winds 25 to 30 knots. Seas 5 to 8 feet, occasionally to 10 feet. A slight chance of showers in the morning. .TUESDAY...Northwest winds 15 to 20 knots, diminishing to 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Winds and seas higher in and near thunderstorms. $$ AMZ452-240745- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- 1133 AM EST Fri Jan 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING... .REST OF TODAY...North winds around 10 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 10 seconds. Intracoastal waters light chop. .TONIGHT...Northeast winds around 10 knots, becoming north 15 to 20 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 10 seconds and northeast 3 feet at 4 seconds. Intracoastal waters choppy. Areas of fog. Visibility 1 NM or less. .SATURDAY...Northeast winds 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 5 seconds and east 3 feet at 10 seconds. Intracoastal waters choppy. Patchy fog in the morning. A slight chance of showers in the afternoon. .SATURDAY NIGHT...Northeast winds 15 to 20 knots, becoming southeast 5 to 10 knots after midnight. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 7 seconds and east 5 feet at 10 seconds. Intracoastal waters choppy. A slight chance of showers in the evening. .SUNDAY...South winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 10 seconds and northeast 3 feet at 7 seconds. Intracoastal waters choppy. .SUNDAY NIGHT...Southwest winds 20 to 25 knots with gusts up to 35 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 10 seconds and south 4 feet at 5 seconds. Intracoastal waters rough. A chance of showers in the evening, then showers likely after midnight. .MONDAY...Northwest winds 25 to 30 knots. Seas 5 to 8 feet, occasionally to 10 feet. Intracoastal waters very rough. A slight chance of showers in the morning. .TUESDAY...North winds 20 to 25 knots, becoming northwest 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet. Intracoastal waters rough. $$ AMZ472-240745- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- 1133 AM EST Fri Jan 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM SATURDAY MORNING THROUGH LATE SUNDAY NIGHT... .REST OF TODAY...North winds around 10 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 10 seconds. .TONIGHT...North winds around 10 knots, increasing to 15 to 20 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 10 seconds and northeast 4 feet at 4 seconds. Patchy fog in the evening. Patchy fog after midnight with visibility 1 NM or less. .SATURDAY...Northeast winds 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 5 seconds and east 4 feet at 10 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SATURDAY NIGHT...East winds 10 to 15 knots, becoming south after midnight. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 10 seconds and northeast 5 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. .SUNDAY...South winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 10 seconds and southeast 3 feet at 6 seconds. .SUNDAY NIGHT...South winds 15 to 20 knots, becoming southwest 20 to 25 knots with gusts up to 35 knots after midnight. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 10 seconds and south 5 feet at 6 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. .MONDAY...Northwest winds 25 to 30 knots. Seas 6 to 8 feet, occasionally to 10 feet, building to 7 to 10 feet, occasionally to 13 feet. A slight chance of showers in the morning. .TUESDAY...North winds 20 to 25 knots, becoming northwest 10 to 15 knots. Seas 6 to 9 feet, occasionally to 11 feet, subsiding to 4 to 6 feet, occasionally to 8 feet. Winds and seas higher in and near thunderstorms. $$ AMZ454-240745- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 1133 AM EST Fri Jan 23 2026 .REST OF TODAY...North winds around 10 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 10 seconds. Intracoastal waters light chop. .TONIGHT...Northeast winds 5 to 10 knots, becoming north 10 to 15 knots after midnight. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 10 seconds and north 2 feet at 4 seconds. Intracoastal waters a moderate chop. Patchy fog in the evening, then areas of fog after midnight. Visibility 1 NM or less. .SATURDAY...North winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 10 seconds and north 3 feet at 5 seconds. Intracoastal waters a moderate chop. Areas of fog in the morning. A slight chance of showers in the afternoon. .SATURDAY NIGHT...East winds 5 to 10 knots, becoming south after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 4 feet at 7 seconds and east 4 feet at 10 seconds. Intracoastal waters light chop. A slight chance of showers in the evening. .SUNDAY...South winds 10 to 15 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 10 seconds and northeast 4 feet at 7 seconds. Intracoastal waters a moderate chop. .SUNDAY NIGHT...Southwest winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 10 seconds and southwest 3 feet at 4 seconds. Intracoastal waters choppy. A slight chance of showers in the evening, then a chance of showers after midnight. .MONDAY...Northwest winds 25 to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet, building to 7 to 10 feet, occasionally to 13 feet. Intracoastal waters very rough. A slight chance of showers in the morning. .TUESDAY...North winds 20 to 25 knots, becoming northwest 10 to 15 knots. Seas 6 to 9 feet, occasionally to 11 feet, subsiding to 4 to 5 feet, occasionally to 6 feet. Intracoastal waters rough. $$ AMZ474-240745- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- 1133 AM EST Fri Jan 23 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM LATE SATURDAY NIGHT THROUGH LATE SUNDAY NIGHT... .REST OF TODAY...North winds 5 to 10 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 10 seconds. .TONIGHT...North winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 10 seconds and north 2 feet at 3 seconds. Patchy fog after midnight. .SATURDAY...Northeast winds 10 to 15 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: East 5 feet at 10 seconds and north 3 feet at 5 seconds. A slight chance of showers in the morning, then a chance of showers in the afternoon. .SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 10 seconds and northeast 4 feet at 7 seconds. A chance of showers, mainly in the evening. .SUNDAY...South winds 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 10 seconds and southeast 3 feet at 6 seconds. .SUNDAY NIGHT...South winds 20 knots, becoming southwest 20 to 25 knots after midnight. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 10 seconds and south 5 feet at 6 seconds. A chance of showers after midnight. .MONDAY...West winds 20 to 25 knots, becoming northwest 25 to 30 knots. Seas 6 to 8 feet, occasionally to 10 feet, building to 10 to 11 feet, occasionally to 14 feet. A chance of showers in the morning. .TUESDAY...North winds 20 to 25 knots, becoming northwest 10 to 15 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding to 4 to 6 feet, occasionally to 8 feet. $$