AMZ400-221445-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
733 PM EDT Tue Apr 21 2026
.SYNOPSIS...
Winds and waves subside gradually tonight as high pressure builds
southward across the area waters. Daily afternoon east-southeast
wind surges in the wake of the sea breeze develop each day through
Friday. Winds shift to southerly ahead of a cold front Saturday and
southwesterly on Sunday as the front begins to stall just north of
the waters. The front will bring increasing chances for showers and
thunderstorms over the waters this weekend.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Apr 21, 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.
$$
AMZ450-452-454-221445- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 733 PM EDT Tue Apr 21 2026 REST OF TONIGHT East winds 5 to 10 knots, becoming south. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal waters light chop. WEDNESDAY Northeast winds 5 to 10 knots, becoming east in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light chop. WEDNESDAY NIGHT South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds. Intracoastal waters light chop. THURSDAY South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds and southeast 2 feet at 3 seconds. Intracoastal waters a moderate chop. THURSDAY NIGHT South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds and southeast 2 feet at 3 seconds. Intracoastal waters light chop. FRIDAY AND FRIDAY NIGHT Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. SATURDAY THROUGH SUNDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A chance of showers with a slight chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-454-221445- 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- 733 PM EDT Tue Apr 21 2026 REST OF TONIGHT East winds 5 to 10 knots, becoming south. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal waters light chop. WEDNESDAY Northeast winds 5 to 10 knots, becoming east in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light chop. WEDNESDAY NIGHT South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds. Intracoastal waters light chop. THURSDAY South winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds and southeast 2 feet at 3 seconds. Intracoastal waters a moderate chop. THURSDAY NIGHT South winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds and southeast 2 feet at 3 seconds. Intracoastal waters light chop. FRIDAY AND FRIDAY NIGHT Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. SATURDAY THROUGH SUNDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A chance of showers with a slight chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$