AMZ400-130800-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
115 PM EDT Sat Sep 12 2026
.SYNOPSIS...
Weakening high pressure south of the area will maintain south to
southwest winds and afternoon sea breezes through the rest of the
weekend. Daily mid to late afternoon thunderstorms will move
offshore, bringing locally strong wind gusts and frequent lightning
at times. On Tuesday, a cold front will push south, sending a strong
northeasterly wind surge through the local waters and elevating
seas. Small craft advisory conditions are probable for the coastal
waters starting Tuesday and may continue into Wednesday and
possibly Thursday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Sep 12, 2026 at 0000 UTC...
50 nautical miles east of Flagler Beach.
58 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
76 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ470-472-474-130800- Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- 115 PM EDT Sat Sep 12 2026 REST OF TODAY South winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds. A slight chance of showers and thunderstorms. TONIGHT Southwest winds 10 to 15 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at 8 seconds and south 2 feet at 4 seconds. A slight chance of showers and thunderstorms. SUNDAY West winds 5 to 10 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds and south 2 feet at 4 seconds. SUNDAY NIGHT South winds 5 to 10 knots, becoming southwest after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 9 seconds. A slight chance of showers and thunderstorms. MONDAY AND MONDAY NIGHT Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 9 seconds. A slight chance of showers and thunderstorms. TUESDAY Northeast winds 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 4 feet at 9 seconds, becoming northeast 8 feet at 7 seconds. A chance of showers in the morning. A chance of thunderstorms through the day. Showers likely in the afternoon, then a chance of showers with a slight chance of thunderstorms in the evening. A slight chance of showers after midnight. WEDNESDAY Northeast winds 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet, subsiding to 6 to 7 feet, occasionally to 9 feet after midnight. A slight chance of showers in the morning, then a slight chance of thunderstorms through the night. A chance of showers. A chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$
AMZ470-472-474-130800- 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- 115 PM EDT Sat Sep 12 2026 REST OF TODAY South winds around 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds. A slight chance of showers and thunderstorms. TONIGHT Southwest winds 10 to 15 knots. Seas around 3 feet. Wave Detail: Southeast 3 feet at 8 seconds and south 2 feet at 4 seconds. A slight chance of showers and thunderstorms. SUNDAY West winds 5 to 10 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 8 seconds and south 2 feet at 4 seconds. SUNDAY NIGHT South winds 5 to 10 knots, becoming southwest after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 9 seconds. A slight chance of showers and thunderstorms. MONDAY AND MONDAY NIGHT Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 9 seconds. A slight chance of showers and thunderstorms. TUESDAY Northeast winds 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 6 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 4 feet at 9 seconds, becoming northeast 8 feet at 7 seconds. A chance of showers in the morning. A chance of thunderstorms through the day. Showers likely in the afternoon, then a chance of showers with a slight chance of thunderstorms in the evening. A slight chance of showers after midnight. WEDNESDAY Northeast winds 20 to 25 knots. Seas 7 to 9 feet, occasionally to 11 feet, subsiding to 6 to 7 feet, occasionally to 9 feet after midnight. A slight chance of showers in the morning, then a slight chance of thunderstorms through the night. A chance of showers. A chance of thunderstorms after midnight. Winds and seas higher in and near thunderstorms. $$