030
FZUS52 KJAX 200954
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
554 AM EDT Thu Aug 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-
554 AM EDT Thu Aug 20 2026

.SYNOPSIS...

Weak high pressure situated over the northern Gulf will maintain a
west to southwesterly wind flow across our local waters during the
next several days. The Atlantic sea breeze will push slowly inland
each afternoon, shifting surface winds to southeasterly and then
southerly during the evening hours, with speeds briefly surging to
near Caution levels around sunset before diminishing overnight.
Meanwhile, a series of frontal boundaries pushing across the
southeastern states will stall just north of the Georgia waters
through early next week. Scattered showers and thunderstorms may
again  impact the near shore waters adjacent to northeast Florida
this afternoon and evening. Coverage of mainly afternoon and evening
showers and thunderstorms will then increase throughout our local
waters on Friday and Saturday. Coverage of afternoon and evening
thunderstorms will then become more isolated or widely scattered by
Sunday and Monday.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 19, 2026 at 0000 UTC...

 54 nautical miles east of Flagler Beach.
 62 nautical miles east of Saint Augustine Beach.
 74 nautical miles east southeast of Jacksonville Beach.
 66 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-
554 AM EDT Thu Aug 20 2026

.TODAY...West winds 5 to 10 knots, becoming east southeast 10 to
15 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast
2 feet at 3 seconds and east 2 feet at 9 seconds. Intracoastal
waters becoming a light chop. A chance of showers and
thunderstorms late this afternoon.
.TONIGHT...South winds around 15 knots, becoming southwest around
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2
feet at 4 seconds. Intracoastal waters a light chop. A chance of
showers and thunderstorms in the evening.
.FRIDAY...Southwest winds 5 to 10 knots, becoming southeast around
15 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 4 seconds. Intracoastal waters becoming a
moderate chop. A chance of showers and thunderstorms in the
afternoon.
.FRIDAY NIGHT...South winds around 15 knots, becoming southwest 10
to 15 knots after midnight. Seas 2 to 3 feet. Wave Detail:
Southeast 3 feet at 4 seconds. Intracoastal waters a moderate
chop. A chance of showers and thunderstorms in the evening.
.SATURDAY...Southwest winds around 10 knots, becoming south 10 to
15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail:
Southeast 2 feet at 5 seconds. Intracoastal waters a light chop.
Showers and thunderstorms likely in the afternoon.
.SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to
3 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal
waters a moderate chop. Showers and thunderstorms likely in the
evening.
.SUNDAY...Southwest winds 10 to 15 knots, becoming south late
in the afternoon. Seas 2 to 3 feet. Intracoastal waters a
light chop. A chance of showers and thunderstorms during the
afternoon.
.SUNDAY NIGHT...South winds around 15 knots, becoming southwest
around 10 knots after midnight. Seas 2 to 3 feet. Intracoastal
waters a light chop. A slight chance of showers and
thunderstorms during the afternoon.
.MONDAY...Southwest winds 5 to 10 knots, becoming southeast around
15 knots late in the afternoon. Seas 2 to 3 feet. Intracoastal
waters becoming a moderate chop. A slight chance of showers and
thunderstorms during the afternoon.

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-
554 AM EDT Thu Aug 20 2026

.TODAY...Southwest winds 5 to 10 knots, becoming south 10 to 15
knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southwest 2
feet at 3 seconds and east 2 feet at 9 seconds.
.TONIGHT...South winds 10 to 15 knots. Seas around 3 feet. Wave
Detail: South 3 feet at 4 seconds and east 2 feet at 8 seconds.
.FRIDAY...Southwest winds 5 to 10 knots, becoming south 10 to 15
knots in the afternoon. Seas 2 to 3 feet. Wave Detail: South 2
feet at 4 seconds and east 2 feet at 8 seconds. A chance of
showers and thunderstorms late in the afternoon.
.FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas around 3
feet. Wave Detail: South 3 feet at 4 seconds and east 2 feet at
8 seconds. A chance of showers and thunderstorms, mainly in the
evening.
.SATURDAY AND SATURDAY NIGHT...Southwest winds 10 to 15 knots.
Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 4 seconds and
east 2 feet at 8 seconds. Showers and thunderstorms likely, mainly
during the afternoon and evening.
.SUNDAY...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southwest 2 feet at 5 seconds and southeast 2 feet at
8 seconds. A chance of showers and thunderstorms.
.SUNDAY NIGHT AND MONDAY...South southwest winds 10 to 15 knots.
Seas 2 to 3 feet. A slight chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.

$$