AMZ400-180900-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
226 PM EDT Mon Aug 17 2026
.SYNOPSIS...
High pressure extending from the Bahamas westward across the Gulf
will gradually weaken this week as a frontal boundary sags southward
over the southeastern states. Westerly winds will prevail during the
next several days, with winds over the near shore waters shifting to
southerly and increasing during the afternoon and evening hours as
the Atlantic sea breeze shifts slowly inland. Coverage of afternoon
and evening showers and thunderstorms will increase on Tuesday ahead
of the approaching frontal boundary. Showers and thunderstorms will
shift to the northeast Florida waters on Wednesday and Thursday as
the front stalls and dissipates.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Aug 17, 2026 at 0000 UTC...
50 nautical miles east of Flagler Beach.
53 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
68 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-180900- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 226 PM EDT Mon Aug 17 2026 REST OF TODAY South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms. TONIGHT West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and east 2 feet at 8 seconds. Intracoastal waters a moderate chop. TUESDAY West winds 10 to 15 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at 3 seconds and east 2 feet at 8 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. TUESDAY NIGHT West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds and east 2 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms in the evening. WEDNESDAY West winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 3 seconds and east 2 feet at 10 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. WEDNESDAY NIGHT South winds 10 to 15 knots, becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and east 2 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of showers in the evening. THURSDAY South winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. FRIDAY South winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. A slight chance of showers and thunderstorms in the evening. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-454-180900- 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 Mon Aug 17 2026 REST OF TODAY South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms. TONIGHT West winds 10 to 15 knots. 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. TUESDAY West winds 10 to 15 knots, becoming south in the afternoon. Seas 2 to 3 feet. Wave Detail: West 2 feet at 3 seconds and east 2 feet at 8 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. TUESDAY NIGHT West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 4 seconds and east 2 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms in the evening. WEDNESDAY West winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southwest 2 feet at 3 seconds and east 2 feet at 10 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. WEDNESDAY NIGHT South winds 10 to 15 knots, becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds and east 2 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of showers in the evening. THURSDAY South winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. FRIDAY South winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the afternoon. A slight chance of showers and thunderstorms in the evening. Winds and waves higher in and near thunderstorms. $$