033
FZUS52 KJAX 171728
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
127 PM EDT Sun Aug 17 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.

AMZ400-180800-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
127 PM EDT Sun Aug 17 2025

.SYNOPSIS...

A weak surface trough will linger across our local waters through
tonight, with showers and thunderstorms increasing in coverage and
intensity through this evening. Stronger storms will be capable of
creating briefly strong wind gusts, frequent lightning strikes, and
possible waterspouts. High pressure will then strengthen over the
Great Lakes region on Monday, with this feature wedging down the
southeastern seaboard through midweek, resulting in breezy
northeasterly winds across our local waters. Meanwhile, Major
Hurricane Erin will turn northwestward tonight and then northward by
Tuesday, remaining east and northeast of the Bahamas. Easterly
swells from Erin will begin to increase within our local waters on
Monday, with Small Craft Advisory conditions expected by Monday
night offshore and on Tuesday near shore. Small Craft conditions
continue will through Thursday night as Erin turns northeastward,
remaining well offshore of the U.S. eastern seaboard.


.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.


$$

AMZ450-452-454-180800-
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-
127 PM EDT Sun Aug 17 2025

.REST OF TODAY...Northeast winds around 10 knots. Seas around
2 feet. Wave Detail: Northeast 2 feet at 4 seconds. Intracoastal
waters light chop. A chance of showers. A chance of
thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 4 seconds and east 2 feet at
9 seconds. Intracoastal waters light chop. A chance of showers. A
chance of thunderstorms, mainly in the evening.
.MONDAY...Northeast winds 5 to 10 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 8 seconds and
east 3 feet at 15 seconds. Intracoastal waters light chop. A
chance of showers and thunderstorms.
.MONDAY NIGHT...Northeast winds 5 to 10 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: East 5 feet at 15 seconds
and east 3 feet at 12 seconds. Intracoastal waters light chop. A
slight chance of showers in the evening.
.TUESDAY...Northeast winds 10 to 15 knots. Seas 5 to 8 feet,
occasionally to 10 feet. Wave Detail: East 8 feet at 15 seconds
and northeast 2 feet at 7 seconds. Intracoastal waters a moderate
chop. A slight chance of showers in the morning, then a chance of
showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 7 to
9 feet, occasionally to 11 feet. Wave Detail: East 9 feet at
15 seconds and northeast 2 feet at 6 seconds. Intracoastal waters
a moderate chop. A chance of showers with a slight chance of
thunderstorms.
.WEDNESDAY...North winds 10 to 15 knots, becoming northwest 5 to
10 knots. Seas 8 to 10 feet, occasionally to 13 feet, subsiding
to 6 to 9 feet, occasionally to 11 feet. Intracoastal waters a
moderate chop. A slight chance of thunderstorms in the morning. A
chance of showers through the day. A chance of thunderstorms in
the afternoon, then a slight chance of showers and thunderstorms
through the night.
.THURSDAY...Northeast winds 5 to 10 knots, becoming southwest.
Seas 5 to 7 feet, occasionally to 9 feet. Intracoastal waters
light chop. A slight chance of showers and thunderstorms in the
morning, then a chance of thunderstorms through the night. A
chance of showers. A slight chance of thunderstorms after
midnight.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-180800-
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-
127 PM EDT Sun Aug 17 2025

.REST OF TODAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 2 feet at 4 seconds and east 2 feet at
9 seconds. A chance of thunderstorms. Showers likely late this
morning, then a chance of showers this afternoon.
.TONIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 2 feet at 4 seconds and east 2 feet at
9 seconds. A chance of showers and thunderstorms.
.MONDAY...Northeast winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 15 seconds
and northeast 3 feet at 8 seconds. A chance of showers and
thunderstorms, mainly in the morning.
.MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet, building to 5 to 8 feet, occasionally to
10 feet after midnight. Wave Detail: East 5 feet at 13 seconds
and northeast 3 feet at 7 seconds, becoming east 7 feet at
15 seconds and east 4 feet at 12 seconds. A slight chance of
showers and thunderstorms.
.TUESDAY...Northeast winds 10 to 15 knots. Seas 7 to 10 feet,
occasionally to 13 feet. Wave Detail: East 9 feet at 15 seconds
and northeast 4 feet at 6 seconds. A chance of showers. A chance
of thunderstorms in the afternoon.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 9 to
12 feet, occasionally to 15 feet. Wave Detail: East 11 feet at
15 seconds and northeast 4 feet at 7 seconds. A chance of
showers. A chance of thunderstorms, mainly in the evening.
.WEDNESDAY...North winds 15 to 20 knots, becoming northwest 5 to
10 knots. Seas 9 to 12 feet, occasionally to 15 feet, subsiding
to 7 to 10 feet, occasionally to 13 feet. Showers likely with a
slight chance of thunderstorms in the morning, then a chance of
showers and thunderstorms.
.THURSDAY...North winds 5 to 10 knots, becoming southwest. Seas
6 to 9 feet, occasionally to 11 feet. A chance of showers.

Winds and seas higher in and near thunderstorms.

$$