AMZ400-190800-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
134 PM EDT Sat Apr 18 2026
.SYNOPSIS...
Surface high pressure ridge over central Florida will push
further south today as a dry cool front moves into the southeast
states. Winds will increase from the south and southeast rest of
today through this evening over the area waters, and then
shift to the southwest and west by Sunday morning. The front
will bring a wind shift to the northwest 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 through Wednesday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Apr 18, 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.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-190800- 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- 134 PM EDT Sat Apr 18 2026 REST OF TODAY Southeast winds 5 to 10 knots, increasing to 10 to 15 knots this afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds and southeast 2 feet at 3 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: Southeast 2 feet at 4 seconds and east 2 feet at 8 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: East 3 feet at 8 seconds. Intracoastal waters a moderate chop. A slight chance of showers in the afternoon. SUNDAY NIGHT North winds 20 to 25 knots, becoming northeast 25 to 30 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet after midnight. Wave Detail: Northeast 5 feet at 8 seconds and north 2 feet at 3 seconds, becoming northeast 7 feet at 6 seconds. Intracoastal waters very rough. MONDAY Northeast winds 25 to 30 knots, diminishing to 20 to 25 knots in the afternoon. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 7 seconds. Intracoastal waters very rough. MONDAY NIGHT East winds 15 to 20 knots, becoming northeast 10 to 15 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet after midnight. Wave Detail: Northeast 6 feet at 8 seconds, becoming east 5 feet at 8 seconds. Intracoastal waters choppy. TUESDAY Northeast winds 10 to 15 knots, becoming east. Seas 3 to 5 feet, occasionally to 6 feet. Intracoastal waters a moderate chop. WEDNESDAY East winds 5 to 10 knots, becoming south. Seas 2 to 3 feet. Intracoastal waters light chop. $$
AMZ450-452-454-190800- 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- 134 PM EDT Sat Apr 18 2026 REST OF TODAY Southeast winds 5 to 10 knots, increasing to 10 to 15 knots this afternoon. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds and southeast 2 feet at 3 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: Southeast 2 feet at 4 seconds and east 2 feet at 8 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: East 3 feet at 8 seconds. Intracoastal waters a moderate chop. A slight chance of showers in the afternoon. SUNDAY NIGHT North winds 20 to 25 knots, becoming northeast 25 to 30 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet after midnight. Wave Detail: Northeast 5 feet at 8 seconds and north 2 feet at 3 seconds, becoming northeast 7 feet at 6 seconds. Intracoastal waters very rough. MONDAY Northeast winds 25 to 30 knots, diminishing to 20 to 25 knots in the afternoon. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 7 seconds. Intracoastal waters very rough. MONDAY NIGHT East winds 15 to 20 knots, becoming northeast 10 to 15 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet, subsiding to 3 to 5 feet, occasionally to 6 feet after midnight. Wave Detail: Northeast 6 feet at 8 seconds, becoming east 5 feet at 8 seconds. Intracoastal waters choppy. TUESDAY Northeast winds 10 to 15 knots, becoming east. Seas 3 to 5 feet, occasionally to 6 feet. Intracoastal waters a moderate chop. WEDNESDAY East winds 5 to 10 knots, becoming south. Seas 2 to 3 feet. Intracoastal waters light chop. $$