FZUS52 KJAX 200953
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
553 AM EDT Sun Sep 20 2026
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.
AMZ400-210100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
553 AM EDT Sun Sep 20 2026
.SYNOPSIS...
Surface troughing and a disturbance aloft located just west of Tampa
Bay will remain nearly stationary through tonight before lifting
slowly north-northeastward across our local waters by Monday night
and Tuesday. Scattered showers and thunderstorms will remain
possible through tonight, with coverage then increasing from Monday
through at least Thursday. East-northeasterly winds will prevail
through Tuesday, with speeds and seas remaining below Caution levels
outside of thunderstorm activity. Strong high pressure building over
southeastern Canada and New England on Tuesday will begin to wedge
down the southeastern seaboard on Wednesday afternoon and evening,
creating a surge of northeasterly winds that will likely create
Small Craft Advisory conditions across our local waters by
Thursday and Friday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Sep 19, 2026 at 0000 UTC...
50 nautical miles east of Flagler Beach.
58 nautical miles east of Saint Augustine Beach.
70 nautical miles east southeast of Jacksonville Beach.
76 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-210100-
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-
553 AM EDT Sun Sep 20 2026
.TODAY...North northwest winds 5 to 10 knots, becoming east
northeast around 10 knots late this morning. Seas around 2 feet.
Wave Detail: East 2 feet at 7 seconds. Intracoastal waters
becoming a light chop. A chance of showers and thunderstorms.
.TONIGHT...East southeast winds 5 to 10 knots. Seas around 2
feet. Wave Detail: East 2 feet at 10 seconds. Intracoastal waters
mostly smooth. A slight chance of showers and thunderstorms.
.MONDAY...North northwest winds 5 to 10 knots, becoming east
northeast 10 to 15 knots early in the afternoon. Seas 2 to 3
feet. Wave Detail: Northeast 2 feet at 7 seconds and east 2 feet
at 8 seconds. Intracoastal waters becoming a light chop. Showers
likely with a chance of thunderstorms, mainly in the morning.
.MONDAY NIGHT...East winds around 10 knots, becoming southeast
around 5 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Northeast 2 feet at 8 seconds and east 2 feet at 8 seconds.
Intracoastal waters becoming smooth. A chance of showers and
thunderstorms.
.TUESDAY...North winds 5 to 10 knots, becoming northeast around 10
knots during the afternoon. Seas around 2 feet. Wave Detail: East
2 feet at 8 seconds. Intracoastal waters becoming a light chop. A
chance of showers and thunderstorms.
.TUESDAY NIGHT...East southeast winds 5 to 10 knots, becoming
north after midnight. Seas around 2 feet. Wave Detail: East 2
feet at 8 seconds. Intracoastal waters mostly smooth. A chance of
showers and thunderstorms.
.WEDNESDAY...North winds around 10 knots, becoming northeast 10
to 15 knots during the afternoon. Seas 2 to 4 feet, occasionally
to 5 feet. Wave Detail: Northeast 3 feet at 4 seconds and east 2
feet at 7 seconds. Intracoastal waters becoming a light chop.
Showers likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast winds around 15 knots, increasing to
15 to 20 knots after midnight. Seas building to 3 to 5 feet,
occasionally to 6 feet. Intracoastal waters becoming choppy.
Showers likely with a chance of thunderstorms
.THURSDAY...Northeast winds 20 to 25 knots. Seas building to 5 to
7 feet, occasionally to 9 feet. Intracoastal waters rough.
Showers likely with a chance of thunderstorms.
Winds and waves higher in and near thunderstorms.
$$
AMZ470-472-474-210100-
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-
553 AM EDT Sun Sep 20 2026
.TODAY...Northeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 7 seconds and east 2 feet at 11 seconds.
A chance of showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 2 feet at 7 seconds and east 2 feet at 10
seconds. A slight chance of showers and thunderstorms.
.MONDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 9 seconds and east 2 feet at
8 seconds. Showers likely with a chance of thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 3 feet at 8 seconds and southeast 2 feet
at 8 seconds. A chance of showers and thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 8 seconds. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 7 seconds. Showers likely with a chance of
thunderstorms.
.WEDNESDAY...Northeast winds 10 to 15 knots, increasing to around
15 knots late in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet. Showers likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots, increasing to
around 20 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Showers likely with a chance of
thunderstorms.
.THURSDAY...Northeast winds 20 to 25 knots. Seas building to 5 to
7 feet, occasionally to 9 feet. Showers likely with a chance of
thunderstorms.
Winds and seas higher in and near thunderstorms.
$$
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
553 AM EDT Sun Sep 20 2026
Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach
FL out to 60 nm.
Seas are provided as a range of the average height of the highest
1/3 of the waves, along with the occasional height of the average
highest 1/10 of the waves.
AMZ400-210100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
553 AM EDT Sun Sep 20 2026
.SYNOPSIS...
Surface troughing and a disturbance aloft located just west of Tampa
Bay will remain nearly stationary through tonight before lifting
slowly north-northeastward across our local waters by Monday night
and Tuesday. Scattered showers and thunderstorms will remain
possible through tonight, with coverage then increasing from Monday
through at least Thursday. East-northeasterly winds will prevail
through Tuesday, with speeds and seas remaining below Caution levels
outside of thunderstorm activity. Strong high pressure building over
southeastern Canada and New England on Tuesday will begin to wedge
down the southeastern seaboard on Wednesday afternoon and evening,
creating a surge of northeasterly winds that will likely create
Small Craft Advisory conditions across our local waters by
Thursday and Friday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Sep 19, 2026 at 0000 UTC...
50 nautical miles east of Flagler Beach.
58 nautical miles east of Saint Augustine Beach.
70 nautical miles east southeast of Jacksonville Beach.
76 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-210100-
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-
553 AM EDT Sun Sep 20 2026
.TODAY...North northwest winds 5 to 10 knots, becoming east
northeast around 10 knots late this morning. Seas around 2 feet.
Wave Detail: East 2 feet at 7 seconds. Intracoastal waters
becoming a light chop. A chance of showers and thunderstorms.
.TONIGHT...East southeast winds 5 to 10 knots. Seas around 2
feet. Wave Detail: East 2 feet at 10 seconds. Intracoastal waters
mostly smooth. A slight chance of showers and thunderstorms.
.MONDAY...North northwest winds 5 to 10 knots, becoming east
northeast 10 to 15 knots early in the afternoon. Seas 2 to 3
feet. Wave Detail: Northeast 2 feet at 7 seconds and east 2 feet
at 8 seconds. Intracoastal waters becoming a light chop. Showers
likely with a chance of thunderstorms, mainly in the morning.
.MONDAY NIGHT...East winds around 10 knots, becoming southeast
around 5 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Northeast 2 feet at 8 seconds and east 2 feet at 8 seconds.
Intracoastal waters becoming smooth. A chance of showers and
thunderstorms.
.TUESDAY...North winds 5 to 10 knots, becoming northeast around 10
knots during the afternoon. Seas around 2 feet. Wave Detail: East
2 feet at 8 seconds. Intracoastal waters becoming a light chop. A
chance of showers and thunderstorms.
.TUESDAY NIGHT...East southeast winds 5 to 10 knots, becoming
north after midnight. Seas around 2 feet. Wave Detail: East 2
feet at 8 seconds. Intracoastal waters mostly smooth. A chance of
showers and thunderstorms.
.WEDNESDAY...North winds around 10 knots, becoming northeast 10
to 15 knots during the afternoon. Seas 2 to 4 feet, occasionally
to 5 feet. Wave Detail: Northeast 3 feet at 4 seconds and east 2
feet at 7 seconds. Intracoastal waters becoming a light chop.
Showers likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast winds around 15 knots, increasing to
15 to 20 knots after midnight. Seas building to 3 to 5 feet,
occasionally to 6 feet. Intracoastal waters becoming choppy.
Showers likely with a chance of thunderstorms
.THURSDAY...Northeast winds 20 to 25 knots. Seas building to 5 to
7 feet, occasionally to 9 feet. Intracoastal waters rough.
Showers likely with a chance of thunderstorms.
Winds and waves higher in and near thunderstorms.
$$
AMZ470-472-474-210100-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
553 AM EDT Sun Sep 20 2026
.TODAY...Northeast winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 7 seconds and east 2 feet at 11 seconds.
A chance of showers and thunderstorms.
.TONIGHT...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 2 feet at 7 seconds and east 2 feet at 10
seconds. A slight chance of showers and thunderstorms.
.MONDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast 3 feet at 9 seconds and east 2 feet at
8 seconds. Showers likely with a chance of thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 2 to 3 feet.
Wave Detail: Northeast 3 feet at 8 seconds and southeast 2 feet
at 8 seconds. A chance of showers and thunderstorms.
.TUESDAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 8 seconds. A chance of showers and
thunderstorms.
.TUESDAY NIGHT...East winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 7 seconds. Showers likely with a chance of
thunderstorms.
.WEDNESDAY...Northeast winds 10 to 15 knots, increasing to around
15 knots late in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet. Showers likely with a chance of thunderstorms.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots, increasing to
around 20 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Showers likely with a chance of
thunderstorms.
.THURSDAY...Northeast winds 20 to 25 knots. Seas building to 5 to
7 feet, occasionally to 9 feet. Showers likely with a chance of
thunderstorms.
Winds and seas higher in and near thunderstorms.
$$