AMZ400-210100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
554 AM EDT Thu Aug 20 2026
.SYNOPSIS...
Weak high pressure situated over the northern Gulf will maintain a
west to southwesterly wind flow across our local waters during the
next several days. The Atlantic sea breeze will push slowly inland
each afternoon, shifting surface winds to southeasterly and then
southerly during the evening hours, with speeds briefly surging to
near Caution levels around sunset before diminishing overnight.
Meanwhile, a series of frontal boundaries pushing across the
southeastern states will stall just north of the Georgia waters
through early next week. Scattered showers and thunderstorms may
again impact the near shore waters adjacent to northeast Florida
this afternoon and evening. Coverage of mainly afternoon and evening
showers and thunderstorms will then increase throughout our local
waters on Friday and Saturday. Coverage of afternoon and evening
thunderstorms will then become more isolated or widely scattered by
Sunday and Monday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Aug 19, 2026 at 0000 UTC...
54 nautical miles east of Flagler Beach.
62 nautical miles east of Saint Augustine Beach.
74 nautical miles east southeast of Jacksonville Beach.
66 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-210100- 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- 554 AM EDT Thu Aug 20 2026 TODAY West winds 5 to 10 knots, becoming east southeast 10 to 15 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds and east 2 feet at 9 seconds. Intracoastal waters becoming a light chop. A chance of showers and thunderstorms late this afternoon. TONIGHT South winds around 15 knots, becoming southwest around 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal waters a light chop. A chance of showers and thunderstorms in the evening. FRIDAY Southwest winds 5 to 10 knots, becoming southeast around 15 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds. Intracoastal waters becoming a moderate chop. A chance of showers and thunderstorms in the afternoon. FRIDAY NIGHT South winds around 15 knots, becoming southwest 10 to 15 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the evening. SATURDAY Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters a light chop. Showers and thunderstorms likely in the afternoon. SATURDAY NIGHT Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal waters a moderate chop. Showers and thunderstorms likely in the evening. SUNDAY Southwest winds 10 to 15 knots, becoming south late in the afternoon. Seas 2 to 3 feet. Intracoastal waters a light chop. A chance of showers and thunderstorms during the afternoon. SUNDAY NIGHT South winds around 15 knots, becoming southwest around 10 knots after midnight. Seas 2 to 3 feet. Intracoastal waters a light chop. A slight chance of showers and thunderstorms during the afternoon. MONDAY Southwest winds 5 to 10 knots, becoming southeast around 15 knots late in the afternoon. Seas 2 to 3 feet. Intracoastal waters becoming a moderate chop. A slight chance of showers and thunderstorms during the afternoon. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-454-210100- 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- 554 AM EDT Thu Aug 20 2026 TODAY West winds 5 to 10 knots, becoming east southeast 10 to 15 knots this afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds and east 2 feet at 9 seconds. Intracoastal waters becoming a light chop. A chance of showers and thunderstorms late this afternoon. TONIGHT South winds around 15 knots, becoming southwest around 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal waters a light chop. A chance of showers and thunderstorms in the evening. FRIDAY Southwest winds 5 to 10 knots, becoming southeast around 15 knots late in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds. Intracoastal waters becoming a moderate chop. A chance of showers and thunderstorms in the afternoon. FRIDAY NIGHT South winds around 15 knots, becoming southwest 10 to 15 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms in the evening. SATURDAY Southwest winds around 10 knots, becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters a light chop. Showers and thunderstorms likely in the afternoon. SATURDAY NIGHT Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal waters a moderate chop. Showers and thunderstorms likely in the evening. SUNDAY Southwest winds 10 to 15 knots, becoming south late in the afternoon. Seas 2 to 3 feet. Intracoastal waters a light chop. A chance of showers and thunderstorms during the afternoon. SUNDAY NIGHT South winds around 15 knots, becoming southwest around 10 knots after midnight. Seas 2 to 3 feet. Intracoastal waters a light chop. A slight chance of showers and thunderstorms during the afternoon. MONDAY Southwest winds 5 to 10 knots, becoming southeast around 15 knots late in the afternoon. Seas 2 to 3 feet. Intracoastal waters becoming a moderate chop. A slight chance of showers and thunderstorms during the afternoon. Winds and waves higher in and near thunderstorms. $$