National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 261826
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
226 PM EDT Wed Aug 26 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.

AMZ400-270900
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
226 PM EDT Wed Aug 26 2026

SYNOPSIS

A stalled frontal boundary positioned just north of the Georgia waters will remain in place during the next several days. Thunderstorms developing over coastal locations will push across our local waters through Friday, mainly during the afternoon and evening hours, with strong to isolated severe storms possible. Offshore winds will otherwise prevail during the overnight and morning hours, with the Atlantic sea breeze shifting winds to onshore each afternoon across the near shore waters. Southerly winds will then surge each evening, with speeds briefly approaching Caution speeds around sunset outside of ongoing thunderstorm activity. Stronger high pressure building over New England this weekend will shift prevailing winds to onshore across our local waters, with scattered showers and thunderstorms possible at any time during the upcoming weekend and early next week.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Aug 26, 2026 at 0000 UTC...

54 nautical miles east of Flagler Beach. 58 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.

---

AMZ450-452-454-270900
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
226 PM EDT Wed Aug 26 2026

REST OF TODAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms.

TONIGHT
South winds 10 to 15 knots. 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, then a slight chance of showers after midnight.

THURSDAY
South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon.

THURSDAY NIGHT
South winds 10 to 15 knots, becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the evening.

FRIDAY
Southwest winds around 5 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters light chop. A chance of showers and thunderstorms in the afternoon.

FRIDAY NIGHT
South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Intracoastal waters light chop. Showers likely with a chance of thunderstorms in the evening, then a slight chance of showers and thunderstorms after midnight.

SATURDAY THROUGH SUNDAY
East winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms.

Winds and waves higher in and near thunderstorms.

---

AMZ470-472-474-270900
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
226 PM EDT Wed Aug 26 2026

REST OF TODAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. A chance of showers and thunderstorms.

TONIGHT
South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 4 seconds. A chance of showers. A chance of thunderstorms, mainly in the evening.

THURSDAY
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 5 seconds.

THURSDAY NIGHT
South winds 10 to 15 knots, becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 2 feet at 9 seconds. A chance of showers and thunderstorms.

FRIDAY
Southwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 2 feet at 9 seconds. A slight chance of showers and thunderstorms.

FRIDAY NIGHT
South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds and east 2 feet at 9 seconds. A chance of thunderstorms. Showers likely, mainly in the evening.

SATURDAY THROUGH SUNDAY
East winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and thunderstorms.

Winds and seas higher in and near thunderstorms.