FZUS52 KJAX 251719
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
119 PM EDT Mon Aug 25 2025

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.

AMZ400-260830
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
119 PM EDT Mon Aug 25 2025

SYNOPSIS

A trough of low pressure will be across the region today while a cold front approaches from the northwest. The cold front will move into the area coastal waters tonight, and then push south of our local waters Tuesday morning. The front will stall across the Florida peninsula by late Wednesday. Near breezy northeast to east winds will develop behind the front on Wednesday and Thursday. The front will lift back northward into north Florida by Friday which may bring an unsettled weather pattern to the area increasing chances of showers and thunderstorms again into the upcoming weekend.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Aug 23, 2025 at 1200 UTC...

57 nautical miles east of Flagler Beach. 69 nautical miles east southeast of Saint Augustine Beach. 75 nautical miles east of Jacksonville Beach. 77 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.

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AMZ450-452-454-260830
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
119 PM EDT Mon Aug 25 2025

REST OF TODAY
Southwest winds 5 to 10 knots, becoming south this afternoon. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 13 seconds and southeast 2 feet at 5 seconds. Intracoastal waters light chop. A slight chance of thunderstorms. A slight chance of showers late this morning, then a chance of showers this afternoon.

TONIGHT
Southwest winds around 10 knots, becoming west after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and east 2 feet at 13 seconds. Intracoastal waters light chop. A slight chance of thunderstorms in the evening. A slight chance of showers.

TUESDAY
Northwest winds 5 to 10 knots, becoming northeast in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and northeast 2 feet at 13 seconds. Intracoastal waters light chop. A chance of showers and thunderstorms in the afternoon.

TUESDAY NIGHT
East winds 5 to 10 knots, becoming north after midnight. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 12 seconds. Intracoastal waters light chop. A slight chance of showers. A slight chance of thunderstorms after midnight.

WEDNESDAY
Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 3 seconds and northeast 2 feet at 12 seconds. Intracoastal waters light chop. A slight chance of showers. A slight chance of thunderstorms in the afternoon.

WEDNESDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 4 seconds. Intracoastal waters light chop. A slight chance of thunderstorms. A chance of showers, mainly in the evening.

THURSDAY
East winds 5 to 10 knots, becoming southeast. Seas around 2 feet. Intracoastal waters light chop. A slight chance of thunderstorms in the morning. A chance of showers. A chance of thunderstorms through the night, then a slight chance of showers and thunderstorms after midnight.

FRIDAY
North winds 5 to 10 knots, becoming east. Seas around 2 feet. Intracoastal waters light chop. A slight chance of thunderstorms in the morning. A chance of showers through the day. A chance of thunderstorms through the night. Showers likely through the night. A slight chance of thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

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AMZ470-472-474-260830
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
119 PM EDT Mon Aug 25 2025

REST OF TODAY
Southwest winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: South 3 feet at 5 seconds and northeast 3 feet at 13 seconds. A slight chance of showers and thunderstorms.

TONIGHT
Southwest winds around 10 knots, becoming west after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: South 3 feet at 5 seconds and northeast 3 feet at 12 seconds. A chance of showers. A slight chance of thunderstorms.

TUESDAY
Northwest winds 5 to 10 knots, becoming north in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northeast 3 feet at 13 seconds and south 2 feet at 5 seconds. A slight chance of showers and thunderstorms.

TUESDAY NIGHT
Southwest winds around 5 knots, becoming north after midnight. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 12 seconds. A chance of showers with a slight chance of thunderstorms.

WEDNESDAY AND WEDNESDAY NIGHT
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 4 seconds and northeast 2 feet at 11 seconds. A chance of showers with a slight chance of thunderstorms.

THURSDAY
East winds 5 to 10 knots, becoming southeast. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 5 seconds. A chance of showers. A slight chance of thunderstorms through the day, then a chance of thunderstorms through the night.

FRIDAY
North winds around 10 knots, becoming east. Seas 2 to 3 feet. A chance of thunderstorms. A chance of showers in the morning, then showers likely.

Winds and seas higher in and near thunderstorms.