National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 280406
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1206 AM EDT Fri Aug 28 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.

AMZ400-281915
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
1206 AM EDT Fri Aug 28 2026

SYNOPSIS

Offshore winds will prevail through tonight, then shift onshore over the weekend as high pressure builds to the north over the weekend, then to the northeast and into the western Atlantic early next week. Showers and thunderstorms are expected again this afternoon and evening as offshore winds continue. Decreasing chances for showers and storms over the weekend and into next week as onshore flow develops.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Aug 27, 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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AMZ450-452-454-281915
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
1206 AM EDT Fri Aug 28 2026

REST OF TONIGHT
Southwest winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters light chop. A slight chance of thunderstorms late this evening. A slight chance of showers.

FRIDAY
Southwest winds around 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters light chop. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon.

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

SATURDAY
Southeast winds 5 to 10 knots, becoming east in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds. Intracoastal waters light chop. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon.

SATURDAY NIGHT AND SUNDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds. Intracoastal waters light chop. A chance of showers and thunderstorms.

SUNDAY NIGHT
Southeast winds 5 to 10 knots, diminishing to around 5 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms after midnight.

MONDAY THROUGH TUESDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. A slight chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

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AMZ470-472-474-281915
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
1206 AM EDT Fri Aug 28 2026

REST OF TONIGHT
Southwest winds 10 to 15 knots. Seas around 3 feet. Wave Detail: South 3 feet at 4 seconds. A slight chance of showers.

FRIDAY
Southwest winds around 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds and east 2 feet at 9 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon.

FRIDAY NIGHT
South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 2 feet at 9 seconds. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight.

SATURDAY
South winds 5 to 10 knots, becoming east in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds. A slight chance of thunderstorms. A chance of showers, mainly in the morning.

SATURDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds and east 2 feet at 8 seconds. A chance of showers. A chance of thunderstorms, mainly in the evening.

SUNDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds and southeast 2 feet at 4 seconds. Showers likely with a chance of thunderstorms in the morning, then a slight chance of showers and thunderstorms in the afternoon.

SUNDAY NIGHT
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

MONDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms in the morning. A slight chance of showers and thunderstorms.

TUESDAY
Northeast winds 5 to 10 knots, becoming southeast. Seas 2 to 3 feet. A slight chance of showers and thunderstorms through the day. A slight chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.