AMZ400-182100-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
224 AM EDT Thu Jun 18 2026
.SYNOPSIS...
Persistent offshore flow continues across the waters into the
weekend. Offshore winds will become quite breezy this afternoon,
possibly near 20 knots in the outer coastal waters. A weak front
trailing a weak low pressure to the north will stall across the
Georgia's coastal waters Friday night. Numerous showers and
afternoon thunderstorms are expected to develop along front as it
dissipates over the weekend. Weaker offshore flow is likely through
the first half of next week as another front approaches and likely
stalls just north of the waters.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Jun 17, 2026 at 0000 UTC...
46 nautical miles east of Flagler Beach.
53 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-182100- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- 224 AM EDT Thu Jun 18 2026 SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH FRIDAY MORNING REST OF TONIGHT Southwest winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal waters a moderate chop. THURSDAY South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. Showers likely with a chance of thunderstorms in the afternoon. THURSDAY NIGHT South winds 10 to 15 knots, becoming southwest 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Intracoastal waters choppy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. FRIDAY Southwest winds 15 to 20 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 5 seconds. Intracoastal waters choppy. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. FRIDAY NIGHT West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: West 2 feet at 3 seconds and southeast 2 feet at 7 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms. SATURDAY West winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. SATURDAY NIGHT West winds around 5 knots. Seas around 2 feet. Intracoastal waters smooth. A slight chance of showers and thunderstorms in the evening. SUNDAY Southwest winds 5 to 10 knots. Waves 1 foot or less, then around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms in the afternoon. A slight chance of showers and thunderstorms in the evening. MONDAY Southwest winds 10 to 15 knots. Seas around 2 feet. Intracoastal waters a moderate chop. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-182100- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- 224 AM EDT Thu Jun 18 2026 SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH FRIDAY MORNING REST OF TONIGHT Southwest winds 10 to 15 knots. Seas around 2 feet. Wave Detail: South 2 feet at 4 seconds. Intracoastal waters a moderate chop. THURSDAY South winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 5 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. Showers likely with a chance of thunderstorms in the afternoon. THURSDAY NIGHT South winds 10 to 15 knots, becoming southwest 15 to 20 knots after midnight. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Intracoastal waters choppy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. FRIDAY Southwest winds 15 to 20 knots. Seas 2 to 3 feet. Wave Detail: Southwest 3 feet at 5 seconds. Intracoastal waters choppy. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. FRIDAY NIGHT West winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: West 2 feet at 3 seconds and southeast 2 feet at 7 seconds. Intracoastal waters a moderate chop. A chance of showers and thunderstorms. SATURDAY West winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. SATURDAY NIGHT West winds around 5 knots. Seas around 2 feet. Intracoastal waters smooth. A slight chance of showers and thunderstorms in the evening. SUNDAY Southwest winds 5 to 10 knots. Waves 1 foot or less, then around 2 feet. Intracoastal waters light chop. A chance of showers and thunderstorms in the afternoon. A slight chance of showers and thunderstorms in the evening. MONDAY Southwest winds 10 to 15 knots. Seas around 2 feet. Intracoastal waters a moderate chop. Winds and waves higher in and near thunderstorms. $$