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FZUS52 KJAX 191147
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
747 AM EDT Sun Jul 19 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.

AMZ400-200300-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
747 AM EDT Sun Jul 19 2026

.SYNOPSIS...

The potential tropical disturbance organizing in the northeastern
Gulf will strengthen slightly today. As it does, southerly winds
will strengthen across the local waters to Exercise Caution levels
this afternoon into evening. Though the Invest 91 low pressure
should move northwest, it`s influence will continue breezy south-
southeasterly winds through at least Wednesday. As high pressure to
the east strengthens, winds may strengthen near Small Craft Advisory
levels causing seas to elevate on Tuesday. For the second half of
the week, offshore flow will develop as a cold front approaches
front he northwest and stalls just north of the waters next weekend.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Jul 18, 2026 at 0000 UTC...

 46 nautical miles east of Flagler Beach.
 49 nautical miles east of Saint Augustine Beach.
 60 nautical miles east southeast of Jacksonville Beach.
 68 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.


$$

AMZ450-452-454-200300-
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-
747 AM EDT Sun Jul 19 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 4 PM EDT THIS
AFTERNOON THROUGH LATE TONIGHT...

.REST OF TODAY...Southwest winds 5 to 10 knots, becoming south
10 to 15 knots this morning, then becoming southeast 15 to
20 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast
3 feet at 5 seconds. Intracoastal waters choppy.
.TONIGHT...South winds 15 to 20 knots, diminishing to 10 to
15 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast
3 feet at 5 seconds. Intracoastal waters choppy.
.MONDAY...South winds 10 to 15 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 2 to 4 feet, occasionally to
5 feet. Wave Detail: Southeast 4 feet at 5 seconds. Intracoastal
waters choppy. A slight chance of showers and thunderstorms in
the afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 4 feet at
7 seconds. Intracoastal waters choppy. A slight chance of showers
and thunderstorms in the evening.
.TUESDAY...South winds 15 to 20 knots, becoming southeast 20 to
25 knots in the afternoon. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: Southeast 5 feet at 6 seconds. Intracoastal
waters rough. A slight chance of showers and thunderstorms in the
afternoon.
.TUESDAY NIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds. Intracoastal waters choppy.
.WEDNESDAY...South winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Intracoastal waters choppy. A slight
chance of showers. A slight chance of thunderstorms through the
night.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms in the morning, then a chance of showers and
thunderstorms through the night. A slight chance of showers and
thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-200300-
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-
747 AM EDT Sun Jul 19 2026

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 4 PM EDT THIS
AFTERNOON THROUGH LATE TONIGHT...

.REST OF TODAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: South 3 feet at 5 seconds.
.TONIGHT...South winds around 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: South 3 feet at 5 seconds.
.MONDAY...South winds 10 to 15 knots, becoming southeast 15 to
20 knots in the afternoon. Seas 3 to 4 feet, occasionally to
5 feet. Wave Detail: Southeast 4 feet at 5 seconds.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds. A slight chance of thunderstorms. A slight chance of
showers in the evening, then a chance of showers after midnight.
.TUESDAY...South winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: South 5 feet at 6 seconds. A
slight chance of showers in the afternoon.
.TUESDAY NIGHT...South winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Wave Detail: Southeast 6 feet at
7 seconds. A slight chance of showers and thunderstorms in the
evening.
.WEDNESDAY...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. A slight chance of showers and
thunderstorms through the night.
.THURSDAY...South winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. A slight chance of showers and
thunderstorms in the morning. A chance of thunderstorms through
the night. A chance of showers. A slight chance of thunderstorms
after midnight.

Winds and seas higher in and near thunderstorms.

$$