FZUS52 KJAX 200529
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1229 AM EST Sat Dec 20 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.
AMZ400-202000-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1229 AM EST Sat Dec 20 2025
.SYNOPSIS...
High pressure will settle over the local waters during the weekend,
allowing for lighter winds and subsiding seas. A weakening cold
frontal boundary will approach our region from the north on Monday
as strong high pressure builds to the north and wedges down the
southeastern seaboard as another coastal trough develops over our
local waters. This feature may develop showers over our local waters
early next week and Small Craft Advisory conditions beginning early
Monday as northeasterly winds surge, with elevated seas likely
persisting through Tuesday as onshore winds only gradually subside.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Dec 19, 2025 at 0000 UTC...
54 nautical miles east of Flagler Beach.
58 nautical miles east of Saint Augustine Beach.
70 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-202000-
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-
1229 AM EST Sat Dec 20 2025
.REST OF TONIGHT...North 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 9 seconds. Intracoastal waters a moderate
chop.
.SATURDAY...North winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: North 3 feet at 4 seconds
and east 3 feet at 9 seconds. Intracoastal waters light chop.
.SATURDAY NIGHT...North winds around 5 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 9 seconds. Intracoastal waters
smooth.
.SUNDAY...North winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 9 seconds and northeast 2 feet at
4 seconds. Intracoastal waters light chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
20 to 25 knots after midnight. Seas 2 to 3 feet, building to 4 to
6 feet, occasionally to 8 feet after midnight. Wave Detail: East
3 feet at 9 seconds and northeast 2 feet at 5 seconds, becoming
northeast 5 feet at 5 seconds and east 3 feet at 10 seconds.
Intracoastal waters rough.
.MONDAY...Northeast winds 20 to 25 knots, diminishing to 15 to
20 knots in the afternoon. Seas 5 to 6 feet, occasionally to
8 feet. Wave Detail: Northeast 6 feet at 6 seconds and east
4 feet at 10 seconds. Intracoastal waters rough.
.MONDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 7 feet, occasionally to
9 feet. Intracoastal waters choppy. A slight chance of showers in
the evening.
.TUESDAY...East winds 5 to 10 knots, diminishing to around
5 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to
3 to 5 feet, occasionally to 6 feet after midnight. Intracoastal
waters light chop.
.WEDNESDAY...North winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Intracoastal waters light chop.
$$
AMZ470-472-474-202000-
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-
1229 AM EST Sat Dec 20 2025
.REST OF TONIGHT...North winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Northwest 4 feet at
5 seconds and east 4 feet at 9 seconds.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 9 seconds and
north 3 feet at 4 seconds.
.SATURDAY NIGHT...North winds around 5 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 9 seconds.
.SUNDAY...North winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 9 seconds.
.SUNDAY NIGHT...North winds 10 to 15 knots, becoming northeast
20 to 25 knots after midnight. Seas 3 to 4 feet, occasionally to
5 feet, building to 4 to 6 feet, occasionally to 8 feet after
midnight. Wave Detail: East 4 feet at 9 seconds and north 2 feet
at 5 seconds, becoming northeast 5 feet at 5 seconds and east
3 feet at 10 seconds.
.MONDAY AND MONDAY NIGHT...East winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Wave Detail: East 8 feet at
9 seconds and northeast 6 feet at 6 seconds. A slight chance of
showers.
.TUESDAY...Southeast winds 10 to 15 knots, becoming east 5 to
10 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to
4 to 6 feet, occasionally to 8 feet.
.WEDNESDAY...North winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet.
$$
CWFJAX
Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
1229 AM EST Sat Dec 20 2025
Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach
FL out to 60 nm.
Seas are provided as a range of the average height of the highest
1/3 of the waves, along with the occasional height of the average
highest 1/10 of the waves.
AMZ400-202000-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1229 AM EST Sat Dec 20 2025
.SYNOPSIS...
High pressure will settle over the local waters during the weekend,
allowing for lighter winds and subsiding seas. A weakening cold
frontal boundary will approach our region from the north on Monday
as strong high pressure builds to the north and wedges down the
southeastern seaboard as another coastal trough develops over our
local waters. This feature may develop showers over our local waters
early next week and Small Craft Advisory conditions beginning early
Monday as northeasterly winds surge, with elevated seas likely
persisting through Tuesday as onshore winds only gradually subside.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Dec 19, 2025 at 0000 UTC...
54 nautical miles east of Flagler Beach.
58 nautical miles east of Saint Augustine Beach.
70 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-202000-
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-
1229 AM EST Sat Dec 20 2025
.REST OF TONIGHT...North 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 9 seconds. Intracoastal waters a moderate
chop.
.SATURDAY...North winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: North 3 feet at 4 seconds
and east 3 feet at 9 seconds. Intracoastal waters light chop.
.SATURDAY NIGHT...North winds around 5 knots. Seas 2 to 3 feet.
Wave Detail: East 3 feet at 9 seconds. Intracoastal waters
smooth.
.SUNDAY...North winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: East 3 feet at 9 seconds and northeast 2 feet at
4 seconds. Intracoastal waters light chop.
.SUNDAY NIGHT...Northeast winds 10 to 15 knots, increasing to
20 to 25 knots after midnight. Seas 2 to 3 feet, building to 4 to
6 feet, occasionally to 8 feet after midnight. Wave Detail: East
3 feet at 9 seconds and northeast 2 feet at 5 seconds, becoming
northeast 5 feet at 5 seconds and east 3 feet at 10 seconds.
Intracoastal waters rough.
.MONDAY...Northeast winds 20 to 25 knots, diminishing to 15 to
20 knots in the afternoon. Seas 5 to 6 feet, occasionally to
8 feet. Wave Detail: Northeast 6 feet at 6 seconds and east
4 feet at 10 seconds. Intracoastal waters rough.
.MONDAY NIGHT...East winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 5 to 7 feet, occasionally to
9 feet. Intracoastal waters choppy. A slight chance of showers in
the evening.
.TUESDAY...East winds 5 to 10 knots, diminishing to around
5 knots. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to
3 to 5 feet, occasionally to 6 feet after midnight. Intracoastal
waters light chop.
.WEDNESDAY...North winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Intracoastal waters light chop.
$$
AMZ470-472-474-202000-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
1229 AM EST Sat Dec 20 2025
.REST OF TONIGHT...North winds 10 to 15 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Northwest 4 feet at
5 seconds and east 4 feet at 9 seconds.
.SATURDAY...Northeast winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 9 seconds and
north 3 feet at 4 seconds.
.SATURDAY NIGHT...North winds around 5 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 4 feet at 9 seconds.
.SUNDAY...North winds 5 to 10 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 9 seconds.
.SUNDAY NIGHT...North winds 10 to 15 knots, becoming northeast
20 to 25 knots after midnight. Seas 3 to 4 feet, occasionally to
5 feet, building to 4 to 6 feet, occasionally to 8 feet after
midnight. Wave Detail: East 4 feet at 9 seconds and north 2 feet
at 5 seconds, becoming northeast 5 feet at 5 seconds and east
3 feet at 10 seconds.
.MONDAY AND MONDAY NIGHT...East winds 20 to 25 knots. Seas 6 to
9 feet, occasionally to 11 feet. Wave Detail: East 8 feet at
9 seconds and northeast 6 feet at 6 seconds. A slight chance of
showers.
.TUESDAY...Southeast winds 10 to 15 knots, becoming east 5 to
10 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to
4 to 6 feet, occasionally to 8 feet.
.WEDNESDAY...North winds 5 to 10 knots. Seas 3 to 5 feet,
occasionally to 6 feet.
$$