National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 100702
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
302 AM EDT Sat Oct 10 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.

AMZ400-102215
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
302 AM EDT Sat Oct 10 2026

SYNOPSIS

A warm front will lift north of the waters this morning as the remnants of Tropical Cyclone Isaias moves northwest of the area with elevated southerly winds and seas through tonight that will continue Small Craft Advisory conditions through late tonight evening hours. Winds will become westerly on Sunday and gradually decrease as a cold front moves through and exits east of the waters. A round of showers and thunderstorms will move through the waters today as tropical moisture moves over the region. A cold front will move through the waters Sunday with chances for showers and thunderstorms early in the day with high pressure building in from the west. High pressure will build over the waters Monday into much of next week.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Oct 09, 2026 at 0000 UTC...

58 nautical miles east of Flagler Beach. 66 nautical miles east of Saint Augustine Beach. 78 nautical miles east southeast of Jacksonville Beach. 71 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.

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AMZ452-454-472-474-102215
Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM
Coastal waters from St. Augustine to Flagler Beach FL out 20 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
302 AM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

TODAY
South winds 20 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: South 6 feet at 6 seconds. Intracoastal waters choppy. A chance of showers with a slight chance of thunderstorms this morning, then showers likely with a chance of thunderstorms this afternoon.

TONIGHT
South winds around 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 6 feet at 6 seconds. Intracoastal waters choppy. A chance of showers and thunderstorms, mainly in the evening.

SUNDAY
Southwest winds 15 to 20 knots, becoming west 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 5 feet at 6 seconds. Intracoastal waters choppy. A slight chance of thunderstorms. A chance of showers, mainly in the morning.

SUNDAY NIGHT
West winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds and west 3 feet at 4 seconds. Intracoastal waters a moderate chop.

MONDAY AND MONDAY NIGHT
Northwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest 3 feet at 4 seconds and east 3 feet at 7 seconds. Intracoastal waters a moderate chop.

TUESDAY THROUGH WEDNESDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 4 seconds and east 2 feet at 7 seconds. Intracoastal waters light chop.

Winds and waves higher in and near thunderstorms.

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AMZ450-470-102215
Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM
302 AM EDT Sat Oct 10 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

TODAY
Southeast winds around 20 knots. Seas 5 to 7 feet, occasionally to 8 feet. Wave Detail: Southeast 6 feet at 7 seconds. Intracoastal waters choppy. A chance of showers and thunderstorms.

TONIGHT
South winds around 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 6 feet at 6 seconds. Intracoastal waters choppy. A chance of showers and thunderstorms, mainly in the evening.

SUNDAY
Southwest winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 5 feet at 6 seconds. Intracoastal waters choppy. A chance of showers with a slight chance of thunderstorms in the morning.

SUNDAY NIGHT
West winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds and west 3 feet at 4 seconds. Intracoastal waters a moderate chop.

MONDAY AND MONDAY NIGHT
Northwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest 3 feet at 4 seconds and southeast 3 feet at 7 seconds. Intracoastal waters a moderate chop.

TUESDAY THROUGH WEDNESDAY
Southeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 3 seconds and southeast 2 feet at 7 seconds. Intracoastal waters light chop.

Winds and waves higher in and near thunderstorms.