Hazardous marine condition(s):
Small Craft Advisory
AMZ400-211630-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
917 PM EDT Tue Oct 20 2026
.SYNOPSIS...
A tight pressure gradient between high pressure over the eastern
states and a strong low pressure well offshore over the western
Atlantic will continue to support hazardous marine conditions across
the area waters this week. Rough seas will persist tonight before
easing slowly through mid week as the low offshore moves slowly
northward. Small craft advisory level conditions will continue into
mid to late week. Another surge of Northeast winds to Gale force is
expected to develop late Friday and continue into this weekend.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Oct 20, 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.
80 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ472-474-211630- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- 917 PM EDT Tue Oct 20 2026 SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING REST OF TONIGHT Northeast winds around 20 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 9 feet at 12 seconds. WEDNESDAY Northeast winds 15 to 20 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 12 seconds. WEDNESDAY NIGHT North winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 11 seconds. THURSDAY North winds around 15 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 12 seconds. THURSDAY NIGHT Northeast winds 15 to 20 knots. Seas around 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 13 seconds and northeast 3 feet at 6 seconds. FRIDAY Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at 6 seconds and northeast 7 feet at 12 seconds. A slight chance of showers in the afternoon. FRIDAY NIGHT Northeast winds 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. SATURDAY Northeast winds 25 to 30 knots. Seas 10 to 12 feet, occasionally to 15 feet, building to 14 to 15 feet, occasionally to 19 feet. Showers with a slight chance of thunderstorms through the day, then a chance of showers in the evening. A slight chance of showers after midnight. SUNDAY Northeast winds around 30 knots. Seas 14 to 15 feet, occasionally to 19 feet. A chance of showers in the morning, then showers likely in the afternoon. A chance of showers in the evening, then a slight chance of showers after midnight. Winds and seas higher in and near thunderstorms. $$
AMZ472-474-211630- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- 917 PM EDT Tue Oct 20 2026 SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING REST OF TONIGHT Northeast winds around 20 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave Detail: Northeast 9 feet at 12 seconds. WEDNESDAY Northeast winds 15 to 20 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 12 seconds. WEDNESDAY NIGHT North winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 11 seconds. THURSDAY North winds around 15 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 12 seconds. THURSDAY NIGHT Northeast winds 15 to 20 knots. Seas around 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 13 seconds and northeast 3 feet at 6 seconds. FRIDAY Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 7 feet at 6 seconds and northeast 7 feet at 12 seconds. A slight chance of showers in the afternoon. FRIDAY NIGHT Northeast winds 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. SATURDAY Northeast winds 25 to 30 knots. Seas 10 to 12 feet, occasionally to 15 feet, building to 14 to 15 feet, occasionally to 19 feet. Showers with a slight chance of thunderstorms through the day, then a chance of showers in the evening. A slight chance of showers after midnight. SUNDAY Northeast winds around 30 knots. Seas 14 to 15 feet, occasionally to 19 feet. A chance of showers in the morning, then showers likely in the afternoon. A chance of showers in the evening, then a slight chance of showers after midnight. Winds and seas higher in and near thunderstorms. $$