AMZ454 Expires:202608130800;;067376 Fzus52 Kjax 121746 Cwfjax
coastal waters forecast for northeast florida/southeast georgia national weather service jacksonville fl 146 pm edt Wed aug 12 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.
amz450-452-454-130800- 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- 146 pm edt Wed aug 12 2026
Rest of today..West winds 5 to 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 7 seconds. Intracoastal waters light chop. A slight chance of showers and Thunderstorms late this morning, then showers and Thunderstorms likely this afternoon.
Tonight..Southwest winds 10 to 15 knots. Seas around 2 feet. Wave detail: southwest 2 feet at 3 seconds. Intracoastal waters a moderate chop. A slight chance of showers and Thunderstorms in the evening.
Thursday..West winds 5 to 10 knots, becoming south in the afternoon. Seas around 2 feet. Wave detail: west 2 feet at 3 seconds. Intracoastal waters light chop. A slight chance of showers and Thunderstorms in the afternoon.
Thursday night..Southwest winds 5 to 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 3 seconds. Intracoastal waters light chop.
Friday..Southwest winds 5 to 10 knots, becoming south 10 to 15 knots in the afternoon. Seas around 2 feet. Wave detail: southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop. A slight chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots, becoming southwest 5 to 10 knots after midnight. Seas around 2 feet. Wave detail: south 2 feet at 4 seconds. Intracoastal waters a moderate chop.
Saturday through Sunday..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A slight chance of showers and Thunderstorms.
winds and waves higher in and near Thunderstorms.

AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 146 Pm Edt Wed Aug 12 2026
Synopsis..
high pressure positioned over the eastern gulf will weaken on Thursday as troughing develops over the southeastern states. Westerly winds will prevail during the next several days, with the sea breeze shifting winds to southeasterly or southerly over the near shore waters each afternoon, followed by southerly evening wind surges that may briefly increase speeds to near caution levels before subsiding after midnight. Strong to isolated severe Thunderstorms may impact portions of our local waters late this afternoon and this evening, with stronger storms capable of producing damaging wind gusts, frequent lightning strikes, and locally rough seas. Scattered mainly afternoon and evening Thunderstorms will remain possible each day through the upcoming weekend.

Gulf stream..
the approximate location of the west wall of the gulf stream as of aug 12, 2026 at 0000 utc...
42 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.