400
FZUS52 KJAX 180523
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
123 AM EDT Sat Oct 18 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.

AMZ400-182000-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
123 AM EDT Sat Oct 18 2025

.SYNOPSIS...

Weakening high pressure positioned along the Carolina coast will
shift offshore of the southeastern seaboard today, allowing winds
and seas to gradually diminish across our local waters. A weakening
cold front will then enter the southeastern states on Sunday,
possibly bringing widely scattered showers and a few thunderstorms
to our area on Sunday evening. Northwesterly winds will briefly
strengthen to Caution levels in the wake of this frontal passage
late Sunday night and early Monday morning. Weak high pressure will
quickly shift over our local waters on Monday afternoon and evening,
with this feature then shifting offshore ahead of a dry cold front
that will likely cross our area on Tuesday night. Stronger high
pressure will build from the lower Mississippi Valley towards the
Tennessee Valley around midweek in the wake of this frontal passage,
resulting in strengthening northeasterly winds and building seas
across our local waters.


.GULF STREAM...

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

 50 nautical miles east of Flagler Beach.
 59 nautical miles east of Saint Augustine Beach.
 75 nautical miles east southeast of Jacksonville Beach.
 81 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ450-452-454-182000-
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-
123 AM EDT Sat Oct 18 2025

.REST OF TONIGHT...East winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 5 feet at 9 seconds.
Intracoastal waters light chop.
.SATURDAY...East winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 9 seconds.
Intracoastal waters light chop.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at
10 seconds and southeast 2 feet at 3 seconds. Intracoastal waters
a moderate chop.
.SUNDAY...South winds 10 to 15 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 12 seconds
and southeast 3 feet at 5 seconds. Intracoastal waters a moderate
chop.
.SUNDAY NIGHT...Southwest winds 10 to 15 knots, becoming
northwest after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Southeast 3 feet at 5 seconds and east
3 feet at 13 seconds. Intracoastal waters a moderate chop. A
slight chance of showers in the evening.
.MONDAY AND MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas
2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at
4 seconds and east 3 feet at 12 seconds. Intracoastal waters a
moderate chop.
.TUESDAY THROUGH WEDNESDAY...Northeast winds 10 to 15 knots. Seas
2 to 3 feet. Intracoastal waters a moderate chop.

$$

AMZ470-472-474-182000-
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-
123 AM EDT Sat Oct 18 2025

.REST OF TONIGHT...East winds 5 to 10 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
9 seconds.
.SATURDAY...East winds 5 to 10 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Northeast 5 feet at
9 seconds.
.SATURDAY NIGHT...Southeast winds 10 to 15 knots. Seas 4 to
5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at
11 seconds and southeast 3 feet at 4 seconds. A slight chance of
showers after midnight.
.SUNDAY...South winds 10 to 15 knots. Seas around 5 feet,
occasionally to 6 feet. Wave Detail: East 5 feet at 14 seconds
and south 3 feet at 4 seconds.
.SUNDAY NIGHT...Southwest winds around 15 knots, becoming west
after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: South 4 feet at 5 seconds and northeast 4 feet at
12 seconds. A slight chance of showers.
.MONDAY AND MONDAY NIGHT...Northeast winds 10 to 15 knots. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: North 3 feet at
4 seconds and east 3 feet at 12 seconds.
.TUESDAY THROUGH WEDNESDAY...Northeast winds 10 to 15 knots. Seas
2 to 3 feet.

$$