NWS Marine Forecast


   AMZ400-100900-  Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-  226 PM EDT Wed Sep 9 2026      .SYNOPSIS...    A stalled frontal boundary positioned across central Florida will  lift slowly northward as a warm front late this afternoon and  tonight before dissipating over the northeast Florida waters on  Thursday. Meanwhile, strong high pressure stretching across the  Carolinas and the southern Appalachians will gradually weaken as it  shifts offshore of the southeastern states tonight and Thursday as a  cold front pushes through the Ohio and Tennessee Valleys. This  weather pattern will result in gradually weakening onshore winds  that will allow seas to subside below Caution levels over the  Georgia and offshore waters adjacent to northeast Florida this  afternoon. Showers and a few embedded thunderstorms will remain  possible through tonight, with a decrease in activity possible on  Thursday. Prevailing winds will become southerly tonight and  Thursday and then southwesterly from Friday through the upcoming  weekend, with the afternoon sea breeze shifting winds to  southeasterly each afternoon across the near shore waters. Showers  and thunderstorms developing over coastal locations during the  afternoon hours will shift eastward across our local waters during  the late afternoon and evening hours from Friday through the  upcoming weekend.      .GULF STREAM...    The approximate location of the west wall of the Gulf Stream as of  Sep 09, 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.  76 nautical miles east southeast of St Simons Island.    This data derived from NCEP Global RTOFS model.      $$
   AMZ450-452-454-100900-  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 Sep 9 2026    REST OF TODAY  East winds 10 to 15 knots. Seas around 4 feet,  occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds.  Intracoastal waters a moderate chop. A chance of showers with a  slight chance of thunderstorms.  TONIGHT  Southeast winds 10 to 15 knots, diminishing to 5 to  10 knots after midnight. Seas 3 to 4 feet, occasionally to  5 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal  waters a moderate chop. A slight chance of showers and  thunderstorms after midnight.  THURSDAY  Southeast winds 5 to 10 knots. Seas 3 to 4 feet,  occasionally to 5 feet. Wave Detail: East 3 feet at 7 seconds.  Intracoastal waters light chop. A slight chance of showers and  thunderstorms in the afternoon.  THURSDAY NIGHT  South winds 5 to 10 knots. Seas 2 to 3 feet.  Wave Detail: East 3 feet at 7 seconds and southeast 2 feet at  4 seconds. Intracoastal waters light chop. A slight chance of  showers and thunderstorms.  FRIDAY  Southwest winds around 5 knots, becoming southeast in  the afternoon. Seas 2 to 3 feet. Wave Detail: East 2 feet at  7 seconds. Intracoastal waters light chop. A slight chance of  showers and thunderstorms in the morning, then 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 and east 2 feet at  7 seconds. Intracoastal waters light chop. A chance of showers  and thunderstorms, mainly in the evening.  SATURDAY  South winds 5 to 10 knots. Seas 2 to 3 feet.  Intracoastal waters light chop. A chance of showers and  thunderstorms through the day, then a slight chance of showers  and thunderstorms through the night.  SUNDAY  South winds 5 to 10 knots. Seas around 2 feet.  Intracoastal waters light chop. A slight chance of showers and  thunderstorms.    Winds and waves higher in and near thunderstorms.    $$