National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 051158
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
758 AM EDT Wed Aug 5 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.

AMZ400-060300
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
758 AM EDT Wed Aug 5 2026

SYNOPSIS

High pressure centered over Bermuda will build westward toward the U.S. east coast through the weekend shifting flow from southeasterly today to more easterly late this week and into the upcoming weekend. Daily rounds of showers and thunderstorms will also continue daily, some of which will produce gusty winds, heavy rain, and frequent lightning strikes.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Aug 04, 2026 at 0000 UTC...

46 nautical miles east of Flagler Beach. 53 nautical miles east of Saint Augustine Beach. 64 nautical miles east southeast of Jacksonville Beach. 66 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.

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AMZ450-452-454-060300
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
758 AM EDT Wed Aug 5 2026

REST OF TODAY
South winds 5 to 10 knots, becoming southeast 10 to 15 knots this afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms.

TONIGHT
South winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds and southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms after midnight.

THURSDAY
Southeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 7 seconds. Intracoastal waters light chop. A chance of showers and thunderstorms.

THURSDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. Intracoastal waters a moderate chop. A slight chance of showers after midnight.

FRIDAY
East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Intracoastal waters a moderate chop. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Intracoastal waters a moderate chop. A chance of showers with a slight chance of thunderstorms.

SATURDAY
Southeast winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Intracoastal waters light chop. A chance of showers and thunderstorms through the day, then a slight chance of showers and thunderstorms in the evening.

SUNDAY
South winds 5 to 10 knots. Seas 2 to 3 feet. Intracoastal waters light chop. A slight chance of thunderstorms. A slight chance of showers.

Winds and waves higher in and near thunderstorms.

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AMZ470-472-474-060300
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
758 AM EDT Wed Aug 5 2026

REST OF TODAY
Southwest winds 5 to 10 knots, becoming southeast this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds and southwest 2 feet at 4 seconds. A slight chance of showers and thunderstorms.

TONIGHT
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

THURSDAY
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds. A chance of showers and thunderstorms.

THURSDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 7 seconds. A slight chance of showers and thunderstorms after midnight.

FRIDAY
East winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 7 seconds. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon.

FRIDAY NIGHT
Southeast winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 8 seconds. A chance of showers. A chance of thunderstorms, mainly in the evening.

SATURDAY
Southeast winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. A chance of showers and thunderstorms, mainly in the morning.

SUNDAY
South winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight chance of showers and thunderstorms in the morning. A slight chance of showers and thunderstorms through the night.

Winds and seas higher in and near thunderstorms.