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National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 150647
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
247 AM EDT Thu Apr 15 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.

AMZ400-152200-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
247 AM EDT Thu Apr 15 2021

SYNOPSIS

A cold front will cross the Georgia waters during the late
afternoon and the northeast Florida waters tonight. This front
will then stall over central Florida on Friday night as low
pressure develops over the lower Mississippi Valley and moves
eastward. This low pressure center will cross southern Georgia on
Saturday and will move offshore on Saturday night, with a weak
frontal boundary then lingering over the northeast Florida waters
through the middle portion of next week. Waves of showers and
thunderstorms will impact the waters from this weekend through
Wednesday.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of
Apr 15, 2021 at 1200 UTC...

 59 nautical miles east of Flagler Beach.
 64 nautical miles east of Saint Augustine Beach.
 74 nautical miles east of Jacksonville Beach.
 86 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.



AMZ450-452-454-152200-
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-
247 AM EDT Thu Apr 15 2021

TODAY
Southwest winds 10 to 15 knots. Seas 3 to 5 feet with a
dominant period 9 seconds. A moderate chop on the intracoastal
waters. Chance of showers and slight chance of thunderstorms in
the afternoon.

TONIGHT
West winds 10 to 15 knots becoming northwest after
midnight. Seas 3 to 4 feet with a dominant period 9 seconds. A
light chop on the intracoastal waters. Chance of showers in the
evening, then slight chance of showers after midnight.

FRIDAY
North winds 10 to 15 knots becoming northeast 5 to
10 knots in the afternoon. Seas 2 to 3 feet with a dominant
period 9 seconds. A moderate chop on the intracoastal waters.
Slight chance of showers and thunderstorms.

FRIDAY NIGHT
East winds 5 knots. Seas 2 to 3 feet. Smooth on
the intracoastal waters. Slight chance of showers in the evening.
Chance of showers after midnight.

SATURDAY
Southeast winds 5 to 10 knots becoming south in the
afternoon. Seas 2 to 3 feet. A light chop on the intracoastal
waters. Chance of showers and slight chance of thunderstorms.

SATURDAY NIGHT
Southwest winds 5 to 10 knots becoming west
10 knots after midnight. Seas 2 to 3 feet. Chance of showers and
slight chance of thunderstorms.

SUNDAY
Northwest winds 5 to 10 knots. Seas 2 to 3 feet.
Showers likely and chance of thunderstorms.

SUNDAY NIGHT
Northwest winds 5 to 10 knots. Seas 1 to 2 feet.
Chance of showers and slight chance of thunderstorms.

MONDAY
North winds 5 to 10 knots becoming northeast in the
afternoon. Seas 1 to 2 feet. Showers likely and chance of
thunderstorms.



AMZ470-472-474-152200-
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-
247 AM EDT Thu Apr 15 2021

SMALL CRAFT SHOULD EXERCISE CAUTION


TODAY
Southwest winds 15 to 20 knots diminishing to 10 to
15 knots in the afternoon. Seas 4 to 6 feet with a dominant
period 9 seconds. Chance of showers and slight chance of
thunderstorms in the afternoon.

TONIGHT
West winds 15 to 20 knots becoming northwest after
midnight. Seas 3 to 5 feet with a dominant period 9 seconds.
Chance of showers and slight chance of thunderstorms in the
evening, then slight chance of showers after midnight.

FRIDAY
North winds 10 to 15 knots diminishing to 5 to 10 knots
in the afternoon. Seas 3 to 4 feet with a dominant period
11 seconds. Slight chance of showers in the morning.

FRIDAY NIGHT
Northeast winds 5 knots becoming east after
midnight. Seas 2 to 3 feet. Chance of showers after midnight.

SATURDAY
South winds 5 to 10 knots. Seas 3 to 4 feet. Chance
of showers and slight chance of thunderstorms.

SATURDAY NIGHT
West winds 10 to 15 knots. Seas 3 to 4 feet.
Chance of showers and slight chance of thunderstorms.

SUNDAY
Northwest winds 10 to 15 knots diminishing to 5 to
10 knots in the afternoon. Seas 3 to 4 feet. Showers likely and
chance of thunderstorms.

SUNDAY NIGHT
West winds 5 to 10 knots. Seas 2 to 3 feet.
Chance of showers and slight chance of thunderstorms.

MONDAY
Northwest winds 10 knots becoming north 5 to 10 knots
in the afternoon. Seas 2 to 3 feet. Showers likely and chance of
thunderstorms.