Hazardous marine condition(s):
Small Craft Advisory
AMZ400-210900-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
225 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.
$$
AMZ452-454-210900- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 225 PM EDT Tue Oct 20 2026 SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING REST OF TODAY North winds 15 to 20 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 13 seconds. Intracoastal waters choppy. TONIGHT Northeast winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 12 seconds. Intracoastal waters choppy. WEDNESDAY Northeast winds 15 to 20 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 12 seconds. Intracoastal waters choppy. WEDNESDAY NIGHT North winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 11 seconds. Intracoastal waters choppy. THURSDAY AND THURSDAY NIGHT Northeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 12 seconds and northeast 5 feet at 6 seconds. Intracoastal waters choppy. FRIDAY Northeast winds 25 to 30 knots. Seas 6 to 8 feet, occasionally to 10 feet, building to 8 to 11 feet, occasionally to 14 feet. Wave Detail: Northeast 8 feet at 6 seconds and northeast 5 feet at 12 seconds, becoming northeast 11 feet at 8 seconds and east 3 feet at 12 seconds. Intracoastal waters very rough. A slight chance of showers in the afternoon. A chance of showers in the evening, then showers likely after midnight. SATURDAY Northeast winds 25 to 30 knots. Seas 10 to 13 feet, occasionally to 17 feet, building to 12 to 13 feet, occasionally to 17 feet after midnight. Intracoastal waters very rough. Showers through the day. A slight chance of thunderstorms in the afternoon, then a chance of showers in the evening. A slight chance of showers after midnight. Winds and waves higher in and near thunderstorms. $$
AMZ452-454-210900- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 225 PM EDT Tue Oct 20 2026 SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY EVENING REST OF TODAY North winds 15 to 20 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 13 seconds. Intracoastal waters choppy. TONIGHT Northeast winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 12 seconds. Intracoastal waters choppy. WEDNESDAY Northeast winds 15 to 20 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 12 seconds. Intracoastal waters choppy. WEDNESDAY NIGHT North winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 11 seconds. Intracoastal waters choppy. THURSDAY AND THURSDAY NIGHT Northeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 6 feet at 12 seconds and northeast 5 feet at 6 seconds. Intracoastal waters choppy. FRIDAY Northeast winds 25 to 30 knots. Seas 6 to 8 feet, occasionally to 10 feet, building to 8 to 11 feet, occasionally to 14 feet. Wave Detail: Northeast 8 feet at 6 seconds and northeast 5 feet at 12 seconds, becoming northeast 11 feet at 8 seconds and east 3 feet at 12 seconds. Intracoastal waters very rough. A slight chance of showers in the afternoon. A chance of showers in the evening, then showers likely after midnight. SATURDAY Northeast winds 25 to 30 knots. Seas 10 to 13 feet, occasionally to 17 feet, building to 12 to 13 feet, occasionally to 17 feet after midnight. Intracoastal waters very rough. Showers through the day. A slight chance of thunderstorms in the afternoon, then a chance of showers in the evening. A slight chance of showers after midnight. Winds and waves higher in and near thunderstorms. $$