National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 091729
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1229 PM EST Tue Dec 9 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.

AMZ400-100800
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
1229 PM EST Tue Dec 9 2025

SYNOPSIS

High pressure centered near the Delmarva region will wedge down the southeastern seaboard through this afternoon, creating breezy north northeasterly winds and elevated seas across our local waters. This high pressure center will weaken as it shifts southward over our local waters tonight and Wednesday morning, allowing for winds to briefly subside. Westerly winds will then strengthen on Wednesday afternoon and evening ahead of an approaching dry frontal boundary, with Small Craft Advisory conditions possible offshore on Wednesday night. This front will cross our region late Wednesday night, followed by another high pressure center building over our region on Thursday and Friday. This high pressure center will then shift offshore by early Saturday ahead of the next frontal boundary that will approach our local waters from the northwest on Sunday afternoon and evening.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Dec 06, 2025 at 1200 UTC...

71 nautical miles east of Flagler Beach. 74 nautical miles east of Saint Augustine Beach. 85 nautical miles east southeast of Jacksonville Beach. 97 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.

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AMZ450-452-454-100800
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
1229 PM EST Tue Dec 9 2025

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 5 PM EST THIS AFTERNOON

REST OF TODAY
North winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 6 seconds. Intracoastal waters choppy.

TONIGHT
North winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 7 seconds and east 4 feet at 9 seconds. Intracoastal waters a moderate chop.

WEDNESDAY
Northwest winds 5 to 10 knots, becoming west 10 to 15 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 4 feet at 10 seconds and west 2 feet at 3 seconds. Intracoastal waters a moderate chop.

WEDNESDAY NIGHT
West winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 4 feet at 10 seconds and southwest 3 feet at 4 seconds. Intracoastal waters choppy.

THURSDAY
Northwest winds 10 to 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Northwest 3 feet at 4 seconds and east 3 feet at 10 seconds. Intracoastal waters a moderate chop.

THURSDAY NIGHT
Northwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at 3 seconds and east 2 feet at 9 seconds. Intracoastal waters light chop.

FRIDAY THROUGH SATURDAY
North winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop.

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AMZ470-472-474-100800
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
1229 PM EST Tue Dec 9 2025

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 5 PM EST THIS AFTERNOON

REST OF TODAY
North winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 7 seconds and east 2 feet at 9 seconds.

TONIGHT
North winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast 5 feet at 8 seconds and east 5 feet at 9 seconds.

WEDNESDAY
Northwest winds 5 to 10 knots, becoming west 15 to 20 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: Northeast 5 feet at 10 seconds and west 3 feet at 4 seconds.

WEDNESDAY NIGHT
West winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: West 6 feet at 5 seconds and northeast 5 feet at 10 seconds.

THURSDAY
Northwest 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: West 5 feet at 5 seconds and east 3 feet at 10 seconds.

THURSDAY 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 2 feet at 9 seconds.

FRIDAY THROUGH SATURDAY
West winds 5 to 10 knots. Seas 2 to 3 feet.