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National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 230749
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
249 AM EST Sat Jan 23 2021

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.

AMZ400-232245-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
249 AM EST Sat Jan 23 2021

SYNOPSIS

A slow moving frontal boundary positioned across north central
Florida early this morning will sink southward through the Florida
peninsula this afternoon as strong high pressure builds over the
Ohio Valley and wedges down the southeastern seaboard.
Northeasterly winds will strengthen and seas will build to
Caution levels offshore this afternoon. High pressure will then
weaken as it slides off the Carolina coast by Sunday evening,
followed by the the front over the Florida peninsula lifting
northward across our waters on Sunday night. Meanwhile, low
pressure developing over Texas on Sunday night will lift
northeastward across the Ozarks on Monday. Southerly winds will
increase over our waters on Monday and will shift to southwesterly
on Monday evening ahead of a cold front that will be entering the
southeastern states. This front will then stall over the Georgia
waters by late Tuesday as a wave of low pressure develops near our
region towards midweek.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of
Jan 23, 2021 at 1200 UTC...

 54 nautical miles east northeast of Flagler Beach.
 61 nautical miles east of Saint Augustine Beach.
 74 nautical miles east of Jacksonville Beach.
 91 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.



AMZ450-452-454-232245-
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-
249 AM EST Sat Jan 23 2021

TODAY
North northeast winds around 10 knots, becoming northeast
around 15 knots during the afternoon. Seas building to 3 to 4 feet
with a dominant period of 5 seconds. A moderate chop on the
intracoastal waters.

TONIGHT
East northeast around 15 knots. Seas 3 to 4 feet with
a dominant period of 6 seconds. A moderate chop on the
intracoastal waters. Slight chance of showers after midnight.

SUNDAY
East winds 10 to 15 knots. Seas 3 to 4 feet with a
dominant period of 6 seconds. A moderate chop on the intracoastal
waters. Slight chance of showers.

SUNDAY NIGHT
East southeast winds 5 to 10 knots, becoming
southeast after midnight. Seas 2 to 3 feet. Mostly smooth on the
intracoastal waters.

MONDAY
South winds around 15 knots. Seas 3 to 4 feet. A
moderate chop on the intracoastal waters.

MONDAY NIGHT
Southwest winds around 15 knots. Seas 3 to 4
feet.

TUESDAY
Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Slight chance of showers and thunderstorms.

TUESDAY NIGHT
Southwest winds 5 to 10 knots. Seas 2 to 3 feet.
Slight chance of showers and thunderstorms.

WEDNESDAY
South winds 5 to 10 knots. Seas 1 to 2 feet. Chance
of showers and slight chance of thunderstorms.



AMZ470-472-474-232245-
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-
249 AM EST Sat Jan 23 2021

SMALL CRAFT SHOULD EXERCISE CAUTION


TODAY
North winds 10 to 15 knots, becoming northeast 15 to 20
knots in the afternoon. Seas building to 4 to 6 feet with a
dominant period of 4 seconds.

TONIGHT
East northeast winds 15 to 20 knots. Seas 4 to 6 feet
with a dominant period of 6 seconds. Slight chance of showers
after midnight.

SUNDAY
East winds 10 to 15 knots. Seas 4 to 6 feet with a
dominant period of 6 seconds. Slight chance of showers.

SUNDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 5 feet.

MONDAY
South winds 15 to 20 knots. Seas 4 to 6 feet.

MONDAY NIGHT
Southwest winds 15 to 20 knots. Seas 4 to 6 feet.

TUESDAY
Southwest winds 15 to 20 knots diminishing to 10 to
15 knots in the afternoon. Seas 3 to 5 feet. Slight chance of
showers and thunderstorms.

TUESDAY NIGHT
West winds 5 to 10 knots. Seas 3 to 4 feet.
Slight chance of showers and thunderstorms.

WEDNESDAY
Southwest winds 5 to 10 knots becoming south in the
afternoon. Seas 2 to 3 feet. Chance of showers and slight chance
of thunderstorms.