647
FZUS52 KJAX 170120
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
920 PM EDT Thu Oct 16 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.

AMZ400-171630-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
920 PM EDT Thu Oct 16 2025

.SYNOPSIS...

High pressure centered over the Great Lakes region will gradually
expand southward and will continue to wedge down the southeastern
seaboard through Friday, creating breezy northeasterly winds
across our local waters. Elevated seas offshore will maintain
Small Craft Advisory conditions through Friday afternoon, while
Caution conditions prevail for the near shore waters adjacent to
northeast Florida. High pressure will then weaken as it shifts
southeastward towards our local waters on Saturday, allowing winds
and seas to diminish. A weakening cold front will then approach
our region on Sunday night, with only a few showers expected as it
crosses our area. Southwesterly winds will briefly strengthen
ahead of this boundary, with winds then shifting to northwesterly
by early Monday. Another mostly dry frontal boundary will approach
from the west on Tuesday, allowing winds to shift to southerly by
Tuesday afternoon.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Oct 11, 2025 at 1200 UTC...

 56 nautical miles east northeast of Flagler Beach.
 59 nautical miles east of Saint Augustine Beach.
 76 nautical miles east of Jacksonville Beach.
 94 nautical miles east of St Simons Island.

This data courtesy of the Naval Oceanographic Office.


$$

AMZ452-454-171630-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
920 PM EDT Thu Oct 16 2025

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.REST OF TONIGHT...Northeast winds 15 to 20 knots. Seas 5 to 6
feet, occasionally to 8 feet. Wave Detail: Northeast 6 feet at 10
seconds and northeast 5 feet at 6 seconds. Intracoastal waters
choppy.
.FRIDAY...Northeast winds 15 to 20 knots. Seas 5 to 6 feet,
occasionally to 8 feet. Wave Detail: Northeast 6 feet at 10
seconds. Intracoastal waters choppy.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots, becoming east 5 to
10 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet.
Wave Detail: East 5 feet at 10 seconds. Intracoastal waters
becoming mostly smooth.
.SATURDAY...East winds around 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 9 seconds.
Intracoastal waters a light chop.
.SATURDAY NIGHT AND SUNDAY...Southeast winds 10 to 15 knots. Seas
3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at
9 seconds and southeast 3 feet at 4 seconds. Intracoastal waters
a light chop.
.SUNDAY NIGHT...South winds 10 to 15 knots, becoming southwest
after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave
Detail: Southeast 3 feet at 4 seconds and east 3 feet at
13 seconds. Intracoastal waters a light chop.
.MONDAY...Northwest winds 10 to 15 knots, becoming northeast
around 10 knots during the afternoon. Seas 3 to 5 feet,
occasionally to 6 feet. Intracoastal waters a light chop.
.MONDAY NIGHT AND TUESDAY...Southeast winds 5 to 10 knots. Seas 2
to 3 feet. Intracoastal waters mostly smooth.

$$

AMZ450-171630-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
920 PM EDT Thu Oct 16 2025

.REST OF TONIGHT...Northeast winds 10 to 15 knots. Seas 3 to 5
feet, occasionally to 6 feet. Wave Detail: East 5 feet at 10
seconds and east 4 feet at 5 seconds. Intracoastal waters a
light chop.
.FRIDAY...Northeast winds around 15 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: East 5 feet at 10 seconds.
Intracoastal waters a moderate chop.
.FRIDAY NIGHT AND SATURDAY...East winds 5 to 10 knots. Seas 3 to
4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 10
seconds. Intracoastal waters mostly smooth.
.SATURDAY NIGHT AND SUNDAY...South winds 10 to 15 knots. Seas 2 to
4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 9
seconds and east 3 feet at 12 seconds. Intracoastal waters a
light chop.
.SUNDAY NIGHT...South winds 10 to 15 knots, becoming west after
midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail:
South 3 feet at 4 seconds and east 3 feet at 13 seconds.
Intracoastal waters a light chop.
.MONDAY...Northwest winds around 10 to 15 knots, becoming
east northeast 5 to 10 knots during the afternoon. Seas 2 to 4
feet, occasionally to 5 feet. Intracoastal waters becoming mostly
smooth.
.MONDAY NIGHT AND TUESDAY...Southeast winds 5 to 10 knots. Seas 2
to 3 feet. Intracoastal waters mostly smooth.

$$

AMZ470-472-474-171630-
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-
920 PM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH FRIDAY AFTERNOON...

.REST OF TONIGHT...Northeast winds 15 to 20 knots. Seas 5 to 7
feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 10
seconds and northeast 2 feet at 6 seconds.
.FRIDAY...Northeast winds around 15 knots. Seas 5 to 7 feet,
occasionally to 9 feet. Wave Detail: Northeast 6 feet at 10
seconds.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots, becoming east
5 to 10 knots after midnight. Seas 4 to 6 feet, occasionally to
8 feet. Wave Detail: Northeast 6 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 and east 2 feet at 9 seconds.
.SATURDAY NIGHT AND SUNDAY...South winds 10 to 15 knots. Seas
4 to 5 feet, occasionally to 6 feet. Wave Detail: Northeast
4 feet at 9 seconds and south 2 feet at 3 seconds.
.SUNDAY NIGHT...South winds around 15 knots, becoming southwest
after midnight. Seas 4 to 6 feet, occasionally to 8 feet. Wave
Detail: South 4 feet at 4 seconds and northeast 4 feet at
12 seconds.
.MONDAY...Northwest winds 10 to 15 knots, becoming northeast
around 10 knots during the afternoon. Seas 4 to 6 feet,
occasionally to 8 feet, subsiding to 3 to 4 feet, occasionally to
5 feet.
.MONDAY NIGHT AND TUESDAY...Southeast winds 5 to 10 knots,
becoming south and increasing to 10 to 15 knots during the
afternoon. Seas 3 to 4 feet, occasionally to 5 feet.

$$