AMZ400-212100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
224 AM EDT Tue Jul 21 2026
.SYNOPSIS...
Breezy southerly winds between the tropical storm Bertha and the
Bermuda high will lead a couple more days of breezy conditions.
Winds will increase to Small Craft Advisory levels this afternoon
and remain elevated through early Wednesday. Seas will rise toward
5
or possibly 6 feet today in response to the winds. Relaxing winds
are expected Wednesday night as flow generally trends offshore as a
weak cold front approaches from the northwest. The front is likely
to stalls north of the waters this weekend as waves of low pressure
track along it. Though offshore flow will be in place from Thursday
onward, afternoon winds in nearshore waters will be driven by the
coastal sea breeze development each afternoon.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Jul 20, 2026 at 0000 UTC...
46 nautical miles east of Flagler Beach.
49 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ470-472-474-212100-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
224 AM EDT Tue Jul 21 2026
SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON
SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON
THROUGH LATE TONIGHT
REST OF TONIGHT
South winds around 15 knots. Seas around
4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at
6 seconds.
TUESDAY
South winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
6 seconds.
TUESDAY NIGHT
South winds 15 to 20 knots. Seas 4 to 5 feet,
occasionally to 6 feet. Wave Detail: Southeast 5 feet at
7 seconds.
WEDNESDAY
South winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas 3 to 4 feet, occasionally to
5 feet. Wave Detail: Southeast 4 feet at 7 seconds.
WEDNESDAY NIGHT
South winds 15 to 20 knots, diminishing to
10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to
6 feet. Wave Detail: South 4 feet at 5 seconds and east 3 feet at
8 seconds.
THURSDAY AND THURSDAY NIGHT
South winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: Southeast 3 feet at 7 seconds.
FRIDAY
South winds 5 to 10 knots. Seas 2 to 3 feet.
SATURDAY
Southwest winds 5 to 10 knots, increasing to 10 to
15 knots. Seas 3 to 4 feet, occasionally to 5 feet. A slight
chance of showers and thunderstorms.
Winds and seas higher in and near thunderstorms.
$$
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