NWS Marine Forecast


   AMZ400-190245-  Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-  731 AM EDT Sat Apr 18 2026      .SYNOPSIS...    Surface high pressure ridging will push south of the area tonight.  Atlantic sea breeze expected to push inland during this afternoon,  bringing a wind shift to the southeast with winds up to 15 knots.  A dry cold frontal passage is expected late Sunday afternoon into  Sunday Night, then a surge of northeast winds follows the frontal  passage through Monday night and Small Craft Advisory with the  potential for Gale force gusts are expected. High pressure  will develop over the area Tuesday, moving east of the area by  Wednesday.    .GULF STREAM...    The approximate location of the west wall of the Gulf Stream as of  Apr 17, 2026 at 0000 UTC...    50 nautical miles east of Flagler Beach.  62 nautical miles east of Saint Augustine Beach.  74 nautical miles east southeast of Jacksonville Beach.  71 nautical miles east southeast of St Simons Island.    This data derived from NCEP Global RTOFS model.    $$
   AMZ450-452-454-190245-  Coastal waters from Altamaha Sound to Fernandina Beach FL out  20 NM-  Coastal waters from Fernandina Beach to St. Augustine FL out  20 NM-  Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-  731 AM EDT Sat Apr 18 2026    TODAY  Southwest winds 5 to 10 knots, becoming southeast 10 to  15 knots this afternoon. Seas 2 to 3 feet. Wave Detail:  East 3 feet at 8 seconds. Intracoastal waters a moderate chop.  TONIGHT  South winds 10 to 15 knots, becoming southwest 5 to  10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East  3 feet at 8 seconds and southeast 2 feet at 4 seconds.  Intracoastal waters a moderate chop.  SUNDAY  West winds 5 to 10 knots, becoming northeast 10 to  15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: South  2 feet at 4 seconds and east 2 feet at 8 seconds. Intracoastal  waters a moderate chop.  SUNDAY NIGHT  Northeast winds 25 to 30 knots. Seas 2 to 4 feet,  occasionally to 5 feet, building to 5 to 7 feet, occasionally to  9 feet after midnight. Wave Detail: Northeast 4 feet at  8 seconds, becoming northeast 7 feet at 6 seconds. Intracoastal  waters very rough. A slight chance of showers in the evening.  MONDAY  Northeast winds 25 to 30 knots, diminishing to 20 to  25 knots in the afternoon. Seas 6 to 9 feet, occasionally to  11 feet. Wave Detail: Northeast 9 feet at 7 seconds. Intracoastal  waters very rough.  MONDAY NIGHT  Northeast winds 15 to 20 knots, diminishing to  10 to 15 knots after midnight. Seas 5 to 7 feet, occasionally to  9 feet. Wave Detail: Northeast 7 feet at 8 seconds. Intracoastal  waters choppy.  TUESDAY  Northeast winds 15 to 20 knots, becoming east 10 to  15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Intracoastal  waters choppy.  WEDNESDAY  East winds 5 to 10 knots, becoming southeast. Seas  2 to 3 feet. Intracoastal waters light chop.    $$