140
FZUS52 KJAX 171135
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
735 AM EDT Mon Aug 17 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.

AMZ400-180245-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
735 AM EDT Mon Aug 17 2026

.SYNOPSIS...

High pressure extending from the Bahamas westward across the Gulf
will gradually weaken this week as a frontal boundary sags southward
over the southeastern states. Westerly winds will prevail during the
next several days, with winds over the near shore waters shifting to
southerly during the afternoon hours as the Atlantic sea breeze
shifts slowly inland. Coverage of afternoon and evening showers and
thunderstorms will increase on Tuesday ahead of the approaching
frontal boundary, with southwesterly winds surging ahead of this
boundary on Tuesday evening possibly bringing speeds up to near
Caution levels. Coverage of afternoon and evening showers and
thunderstorms will shift to the northeast Florida waters on
Wednesday and Thursday.


.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of
Aug 16, 2026 at 0000 UTC...

 50 nautical miles east of Flagler Beach.
 53 nautical miles east of Saint Augustine Beach.
 64 nautical miles east southeast of Jacksonville Beach.
 68 nautical miles east southeast of St Simons Island.

This data derived from NCEP Global RTOFS model.


$$

AMZ450-452-454-180245-
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-
735 AM EDT Mon Aug 17 2026

.REST OF TODAY...West winds 10 to 15 knots, diminishing to 5 to
10 knots this morning, then becoming south 10 to 15 knots this
afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at
3 seconds and southeast 2 feet at 8 seconds. Intracoastal waters
a moderate chop. A slight chance of showers and thunderstorms
this afternoon.
.TONIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 4 seconds and east 2 feet at 8 seconds.
Intracoastal waters a moderate chop.
.TUESDAY...West winds 10 to 15 knots, becoming south in the
afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at
3 seconds and east 2 feet at 8 seconds. Intracoastal waters a
moderate chop. A chance of showers and thunderstorms in the
afternoon.
.TUESDAY NIGHT...West winds 10 to 15 knots. Seas 2 to 3 feet.
Wave Detail: Southwest 3 feet at 4 seconds and east 2 feet at
9 seconds. Intracoastal waters a moderate chop. A chance of
showers and thunderstorms in the evening.
.WEDNESDAY...West winds 5 to 10 knots, becoming southeast in the
afternoon. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at
3 seconds and east 2 feet at 10 seconds. Intracoastal waters
light chop. A slight chance of showers and thunderstorms in the
afternoon.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 3 seconds and east 2 feet at
9 seconds. Intracoastal waters light chop. A slight chance of
showers in the evening.
.THURSDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop. A slight chance of showers
and thunderstorms through the night.
.FRIDAY...South winds 10 to 15 knots. Seas 2 to 3 feet.
Intracoastal waters a moderate chop. A chance of showers and
thunderstorms in the afternoon. A slight chance of showers and
thunderstorms in the evening.

Winds and waves higher in and near thunderstorms.

$$

AMZ470-472-474-180245-
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-
735 AM EDT Mon Aug 17 2026

.REST OF TODAY...West winds 10 to 15 knots, becoming southwest
this afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at
4 seconds and southeast 2 feet at 8 seconds.
.TONIGHT...Southwest winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Southwest 3 feet at
4 seconds and southeast 2 feet at 8 seconds.
.TUESDAY...West winds 10 to 15 knots, becoming southwest in the
afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
West 3 feet at 4 seconds and east 2 feet at 8 seconds. A slight
chance of showers and thunderstorms in the afternoon.
.TUESDAY NIGHT...West winds 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Wave Detail: Southwest 3 feet at
4 seconds and east 2 feet at 10 seconds. A slight chance of
showers and thunderstorms in the evening.
.WEDNESDAY AND WEDNESDAY NIGHT...Southwest winds 5 to 10 knots.
Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 4 seconds and
east 2 feet at 10 seconds.
.THURSDAY THROUGH FRIDAY...Southwest winds 10 to 15 knots. Seas
2 to 3 feet. Wave Detail: South 3 feet at 5 seconds and east
2 feet at 9 seconds. A slight chance of showers and
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$