National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 140625
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
224 AM EDT Sat Mar 14 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.

AMZ400-142100
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
224 AM EDT Sat Mar 14 2026

SYNOPSIS

A ridge of high pressure just north of the area will slowly move northeast over the open Atlantic today. As the high pressure system shifts farther away, a warm front will gradually lift northward across the Florida Peninsula Saturday night. Shower and thunderstorm chances will increase from south to north late Saturday night through Sunday night as the front approaches and moves through the region.

A strong cold front will then move across the area on Monday. South to southwest winds will increase ahead of the front before shifting to northwest behind it. Small Craft Advisory conditions are expected to redevelop over the coastal waters Monday and persist through at least Tuesday.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Mar 13, 2026 at 0000 UTC...

50 nautical miles east of Flagler Beach. 53 nautical miles east of Saint Augustine Beach. 64 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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AMZ450-452-454-142100
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
224 AM EDT Sat Mar 14 2026

REST OF TONIGHT
Northeast winds around 5 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 9 seconds. Intracoastal waters smooth.

SATURDAY
Northeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 9 seconds. Intracoastal waters a moderate chop.

SATURDAY NIGHT
East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. 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 after midnight.

SUNDAY
Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Intracoastal waters a moderate chop. Showers likely. A chance of thunderstorms, mainly in the morning.

SUNDAY NIGHT
South winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds and south 2 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of thunderstorms. Showers likely, mainly in the evening.

MONDAY
South winds 15 to 20 knots, becoming southwest 20 to 25 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: South 5 feet at 6 seconds. Intracoastal waters rough. Showers with a chance of thunderstorms.

MONDAY NIGHT
Northwest winds 25 to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Intracoastal waters very rough. A slight chance of showers and thunderstorms in the evening.

TUESDAY
Northwest winds 20 to 25 knots, becoming north 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to 2 to 4 feet, occasionally to 5 feet. Intracoastal waters rough.

WEDNESDAY
North winds 15 to 20 knots, becoming northeast 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters rough.

Winds and waves higher in and near thunderstorms.

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AMZ470-472-474-142100
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
224 AM EDT Sat Mar 14 2026

REST OF TONIGHT
East winds 5 to 10 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 9 seconds.

SATURDAY
Northeast winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 9 seconds.

SATURDAY NIGHT
East winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

SUNDAY
Southeast winds 10 to 15 knots. Seas around 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Showers likely with a chance of thunderstorms.

SUNDAY NIGHT
South winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Southeast 5 feet at 6 seconds. Showers likely with a chance of thunderstorms.

MONDAY
South winds 20 to 25 knots, becoming southwest 25 to 30 knots in the afternoon. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: South 5 feet at 7 seconds. A chance of thunderstorms. Showers.

MONDAY NIGHT
West winds 25 to 30 knots. Seas 6 to 9 feet, occasionally to 11 feet. A chance of showers with a slight chance of thunderstorms in the evening.

TUESDAY
Northwest winds 20 to 25 knots, becoming north around 15 knots. Seas 6 to 9 feet, occasionally to 11 feet, subsiding to 4 to 6 feet, occasionally to 8 feet.

WEDNESDAY
North winds 15 to 20 knots, becoming northeast 20 to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers through the night.

Winds and seas higher in and near thunderstorms.