105
FZUS52 KJAX 190658
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
258 AM EDT Wed Aug 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.

AMZ400-192200-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
258 AM EDT Wed Aug 19 2026

.SYNOPSIS...

Weak high pressure situated over the northern Gulf will maintain a
northwest to westerly wind flow across our local waters today. The
Atlantic sea breeze will push slowly inland this afternoon,
shifting surface winds to southeasterly this afternoon and then
southerly this evening, with speeds briefly surging around sunset
before diminishing overnight. Meanwhile, a stalled frontal
boundary positioned just north of the Georgia waters will remain
in place during the next several days. Scattered showers and
thunderstorms may impact the near shore waters adjacent to
northeast Florida this afternoon and evening and again on Thursday
afternoon and evening. Coverage of mainly afternoon and evening
showers and thunderstorms will then increase from Friday through
the upcoming weekend throughout our local waters as southwesterly
winds prevail, with afternoon sea breezes developing each day.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 18, 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.
 66 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.

$$

AMZ450-452-454-192200-
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-
258 AM EDT Wed Aug 19 2026

.TODAY...Northwest winds around 10 knots, becoming east southeast
10 to 15 knots this afternoon. Seas 2 to 3 feet. Wave Detail:
West 2 feet at 3 seconds and east 2 feet at 10 seconds.
Intracoastal waters a light chop. A chance of showers and
thunderstorms this afternoon.
.TONIGHT...South winds 10 to 15 knots, becoming southwest and
diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet.
Wave Detail: South 2 feet at 4 seconds and east 2 feet at 9
seconds. Intracoastal waters becoming mostly smooth. A slight
chance of showers and thunderstorms in the evening.
.THURSDAY...West southwest winds around 5 knots, becoming
southeast 10 to 15 knots in the afternoon. Seas around 2 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 in the afternoon.
.THURSDAY NIGHT...South winds 10 to 15 knots, becoming southwest
around 10 knots after midnight. Seas 2 to 3 feet. Wave Detail:
South 2 feet at 4 seconds and east 2 feet at 8 seconds.
Intracoastal waters a light chop. A slight chance of showers and
thunderstorms in the evening.
.FRIDAY...South southwest winds 5 to 10 knots, becoming southeast
and increasing to around 15 knots in the afternoon. Seas 2 to 3
feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal
waters becoming a moderate chop. Showers and thunderstorms likely
during 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 2 feet at 4 seconds. Intracoastal waters becoming a
light chop. A chance of showers and thunderstorms in the evening.
.SATURDAY THROUGH SUNDAY...Southwest winds 10 to 15 knots,
becoming south southeast during the afternoon. Seas 2 to 3 feet.
Intracoastal waters a light chop. Showers and thunderstorms
likely, mainly during the afternoon and evening.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-192200-
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-
258 AM EDT Wed Aug 19 2026

.TODAY...West winds 10 to 15 knots, becoming south 5 to 10 knots
this afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave
Detail: West 3 feet at 4 seconds and east 2 feet at 10 seconds.
.TONIGHT...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southwest
2 feet at 4 seconds and east 2 feet at 9 seconds.
.THURSDAY...Southwest winds 5 to 10 knots, becoming south in the
afternoon. Seas around 2 feet. Wave Detail: East 2 feet at
9 seconds.
.THURSDAY NIGHT...South winds around 10 knots. Seas 2 to 3 feet.
Wave Detail: South 2 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 in the afternoon.
.FRIDAY NIGHT...South winds 10 to 15 knots. Seas around 3 feet.
Wave Detail: South 3 feet at 4 seconds and east 2 feet at
9 seconds. A chance of showers and thunderstorms, mainly in the
evening.
.SATURDAY THROUGH SUNDAY...Southwest winds 10 to 15 knots. Seas
2 to 3 feet. Showers and thunderstorms likely, mainly during the
afternoon and evening.

Winds and seas higher in and near thunderstorms.

$$