National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 060551
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
150 AM EDT Mon Apr 6 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.

AMZ400-062000
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
150 AM EDT Mon Apr 6 2026

SYNOPSIS

A Small Craft Advisory will be in effect this morning for a surge of northeasterly winds pushing north to south along the coast. Strong onshore winds will continue through the week and will intensify to Gale Force Tuesday night through Wednesday as strong high pressure wedges in from the north. Strong onshore winds with a long fetch will build seas to 10 to 15 feet Wednesday through Thursday. Winds will gradually weaken through Thursday and Friday as high pressure moves away before much improved conditions developing this weekend.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Apr 05, 2026 at 0000 UTC...

54 nautical miles east of Flagler Beach. 66 nautical miles east of Saint Augustine Beach. 78 nautical miles east southeast of Jacksonville Beach. 68 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.

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AMZ450-452-454-062000
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
150 AM EDT Mon Apr 6 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TUESDAY NIGHT

GALE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE WEDNESDAY NIGHT

REST OF TONIGHT
Southwest winds 5 to 10 knots, becoming northwest 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of showers.

MONDAY
Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet in the afternoon. Wave Detail: Northeast 4 feet at 4 seconds and east 4 feet at 9 seconds, becoming northeast 6 feet at 6 seconds and east 3 feet at 9 seconds. Intracoastal waters rough. A chance of showers in the morning, then showers likely with a slight chance of thunderstorms in the afternoon.

MONDAY NIGHT
Northeast winds 20 to 25 knots, increasing to 25 to 30 knots after midnight. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 9 feet at 8 seconds. Intracoastal waters very rough. Showers likely with a chance of thunderstorms.

TUESDAY
Northeast winds 20 to 25 knots, increasing to 25 to 30 knots in the afternoon. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Northeast 9 feet at 8 seconds. Intracoastal waters very rough. A slight chance of thunderstorms. Showers likely, mainly in the morning.

TUESDAY NIGHT
Northeast winds 25 to 30 knots. Seas 8 to 11 feet, occasionally to 14 feet. Wave Detail: East 11 feet at 9 seconds. Intracoastal waters very rough. A slight chance of thunderstorms in the evening. A chance of showers.

WEDNESDAY
Northeast winds 25 to 30 knots. Seas 9 to 13 feet, occasionally to 17 feet. Wave Detail: East 13 feet at 10 seconds. Intracoastal waters very rough. Showers likely. A slight chance of thunderstorms in the afternoon.

WEDNESDAY NIGHT
East winds 25 to 30 knots. Seas 10 to 14 feet, occasionally to 18 feet. Intracoastal waters very rough. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight.

THURSDAY
Northeast winds 25 to 30 knots. Seas 9 to 13 feet, occasionally to 17 feet, subsiding to 8 to 11 feet, occasionally to 14 feet after midnight. Intracoastal waters very rough. A slight chance of thunderstorms in the morning. Showers likely through the day. A chance of thunderstorms in the afternoon, then a chance of showers with a slight chance of thunderstorms in the evening. A slight chance of showers after midnight.

FRIDAY
Northeast winds 20 to 25 knots. Seas 7 to 10 feet, occasionally to 13 feet, subsiding to 6 to 8 feet, occasionally to 10 feet after midnight. Intracoastal waters rough. A slight chance of showers and thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.

Winds and waves higher in and near thunderstorms.

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AMZ470-472-474-062000
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
150 AM EDT Mon Apr 6 2026

SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TUESDAY NIGHT

GALE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE WEDNESDAY NIGHT

REST OF TONIGHT
Southwest winds 10 to 15 knots, becoming west. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 9 seconds. A chance of showers and thunderstorms.

MONDAY
Northeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 6 seconds and east 5 feet at 9 seconds. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon.

MONDAY NIGHT
Northeast winds 20 to 25 knots, increasing to 25 to 30 knots after midnight. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 9 feet at 8 seconds. A chance of thunderstorms. Showers.

TUESDAY
Northeast winds 25 to 30 knots. Seas 8 to 11 feet, occasionally to 14 feet. Wave Detail: Northeast 11 feet at 8 seconds. A slight chance of thunderstorms. Showers, mainly in the morning.

TUESDAY NIGHT
Northeast winds 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet. Wave Detail: East 12 feet at 9 seconds. A chance of showers with a slight chance of thunderstorms.

WEDNESDAY
Northeast winds 25 to 30 knots with gusts up to 40 knots. Seas 11 to 15 feet, occasionally to 19 feet. Wave Detail: East 15 feet at 10 seconds. Showers likely. A slight chance of thunderstorms in the afternoon.

WEDNESDAY NIGHT
East winds 25 to 30 knots. Seas 12 to 15 feet, occasionally to 19 feet. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

THURSDAY
East winds 25 to 30 knots. Seas 10 to 14 feet, occasionally to 18 feet. A slight chance of thunderstorms in the morning. Showers likely through the day. A chance of thunderstorms through the night. A chance of showers through the night. A slight chance of thunderstorms after midnight.

FRIDAY
Northeast winds 15 to 20 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 10 feet, occasionally to 13 feet. A chance of showers with a slight chance of thunderstorms through the day, then a slight chance of showers through the night.

Winds and seas higher in and near thunderstorms.