National Weather Service Raw Text Product

502 
FZUS52 KJAX 190555
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
155 AM EDT Tue Aug 19 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.

AMZ400-192300-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
155 AM EDT Tue Aug 19 2025

.SYNOPSIS...

High pressure across New England extends south across north Georgia 
today as Hurricane Erin tracks northwest to north, remaining east of
the Bahamas. This pattern will bring strengthening northeast winds 
over the local waters today as swells continue to build. Erin tracks
north tonight and then northeast into late Wednesday remaining 
offshore of the North Carolina coast. An extended period of Small 
Craft conditions will impact the local waters through Saturday due 
to lingering swells. A front will stall across the region Friday 
into the weekend bringing an increase in shower and thunderstorm 
activity.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 16, 2025 at 1200 UTC...

 57 nautical miles east of Flagler Beach.
 63 nautical miles east northeast of Saint Augustine Beach.
 68 nautical miles east of Jacksonville Beach.
 75 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ450-452-454-192300-
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-
155 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE THURSDAY NIGHT...

.TODAY...Northeast winds 10 to 15 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: East 7 feet at 15 seconds
and northeast 3 feet at 7 seconds. Intracoastal waters a moderate
chop. A slight chance of showers. A chance of thunderstorms this
afternoon. 
.TONIGHT...Northeast winds 15 to 20 knots. Seas 6 to 9 feet,
occasionally to 11 feet. Wave Detail: East 8 feet at 16 seconds
and northeast 3 feet at 6 seconds. Intracoastal waters choppy. A
slight chance of showers and thunderstorms. 
.WEDNESDAY...North winds 15 to 20 knots. Seas 8 to 11 feet,
occasionally to 14 feet. Wave Detail: East 10 feet at 16 seconds
and northeast 5 feet at 6 seconds. Intracoastal waters choppy. A
chance of showers. A slight chance of thunderstorms in the
morning, then a chance of thunderstorms in the afternoon. 
.WEDNESDAY NIGHT...North winds 10 to 15 knots, becoming west
after midnight. Seas 8 to 11 feet, occasionally to 14 feet. Wave
Detail: East 10 feet at 16 seconds and northeast 4 feet at
8 seconds. Intracoastal waters a moderate chop. A slight chance
of showers and thunderstorms in the evening. 
.THURSDAY...Northwest winds 10 to 15 knots, becoming southeast
5 to 10 knots in the afternoon. Seas 7 to 9 feet, occasionally to
11 feet. Wave Detail: East 9 feet at 15 seconds and north 2 feet
at 9 seconds. Intracoastal waters a moderate chop. A slight
chance of showers and thunderstorms in the morning, then a chance
of showers and thunderstorms in the afternoon. 
.THURSDAY NIGHT...Southwest winds around 10 knots, becoming west
after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave
Detail: East 7 feet at 14 seconds and southeast 2 feet at
6 seconds. Intracoastal waters light chop. A chance of showers. A
chance of thunderstorms, mainly in the evening. 
.FRIDAY THROUGH SATURDAY...Southwest winds 5 to 10 knots. Seas
4 to 6 feet, occasionally to 8 feet. Intracoastal waters light
chop. Showers with thunderstorms likely. 

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-192300-
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-
155 AM EDT Tue Aug 19 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY MORNING...

.TODAY...Northeast winds 10 to 15 knots. Seas 6 to 9 feet,
occasionally to 11 feet. Wave Detail: East 8 feet at 16 seconds
and northeast 4 feet at 6 seconds. A slight chance of showers and
thunderstorms this morning, then a chance of showers and
thunderstorms this afternoon. 
.TONIGHT...Northeast winds 15 to 20 knots. Seas 9 to 12 feet,
occasionally to 15 feet. Wave Detail: Southeast 11 feet at
15 seconds and northeast 4 feet at 6 seconds. A slight chance of
showers and thunderstorms. 
.WEDNESDAY...North winds 15 to 20 knots. Seas 11 to 15 feet,
occasionally to 19 feet. Wave Detail: East 13 feet at 16 seconds
and north 6 feet at 8 seconds. A chance of showers. A slight
chance of thunderstorms in the morning, then a chance of
thunderstorms in the afternoon. 
.WEDNESDAY NIGHT...North winds 10 to 15 knots, becoming west
after midnight. Seas 11 to 14 feet, occasionally to 18 feet,
subsiding to 9 to 12 feet, occasionally to 15 feet after
midnight. Wave Detail: East 12 feet at 15 seconds and northeast
5 feet at 9 seconds, becoming east 11 feet at 15 seconds and
northeast 4 feet at 9 seconds. A chance of showers. A chance of
thunderstorms, mainly in the evening. 
.THURSDAY...Northwest winds 10 to 15 knots, becoming east 5 to
10 knots in the afternoon. Seas 8 to 11 feet, occasionally to
14 feet. Wave Detail: East 10 feet at 14 seconds and north 3 feet
at 9 seconds. A slight chance of showers and thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. 
.THURSDAY NIGHT...Southwest winds around 10 knots, becoming west
after midnight. Seas 6 to 9 feet, occasionally to 11 feet. Wave
Detail: East 9 feet at 14 seconds and southeast 2 feet at
6 seconds. A chance of showers and thunderstorms. 
.FRIDAY THROUGH SATURDAY...Southwest winds 5 to 10 knots. Seas
5 to 8 feet, occasionally to 10 feet. Showers with a chance of
thunderstorms. 

Winds and seas higher in and near thunderstorms.

$$