National Weather Service Marine Forecast FZUS52 KJAX

FZUS52 KJAX 311838
CWFJAX

Coastal Waters Forecast for Northeast Florida/Southeast Georgia
National Weather Service Jacksonville FL
238 PM EDT Sat Oct 31 2026

Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach FL out to 60 nm.

Seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 1/10 of the waves.

AMZ400-010945
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
238 PM EDT Sat Oct 31 2026

SYNOPSIS

A strong high pressure ridge will build southward across area waters today behind a weakening cold front. This ridging will then wedge down the southeastern seaboard this weekend and early next week. A slight surge in northeasterly winds today will return hazards across the coastal waters once again for the weekend. A wavy stationary frontal boundary lifting slowly northward across the Florida peninsula late this weekend will return more numerous showers and a few embedded thunderstorms on Sunday and Monday across our local waters. High pressure will then build more northeast of the region towards mid week before another cold front approaches from the northwest.

GULF STREAM

The approximate location of the west wall of the Gulf Stream as of Oct 31, 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.

---

AMZ450-452-454-010945
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
238 PM EDT Sat Oct 31 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING

REST OF TODAY
Northeast winds around 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave Detail: East 6 feet at 8 seconds. Intracoastal waters choppy. A chance of showers.

TONIGHT
East winds around 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds. Intracoastal waters choppy. A slight chance of showers in the evening, then a chance of showers after midnight.

SUNDAY
East winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds. Intracoastal waters choppy. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.

SUNDAY NIGHT
East winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 8 seconds. Intracoastal waters choppy. A slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

MONDAY
East winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 8 seconds. Intracoastal waters choppy. Showers likely with a slight chance of thunderstorms.

MONDAY NIGHT
East winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 6 feet at 8 seconds. Intracoastal waters choppy. A chance of showers with a slight chance of thunderstorms.

TUESDAY
Northeast winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters a moderate chop. A chance of showers through the day. A slight chance of thunderstorms. A slight chance of showers through the night.

WEDNESDAY
East winds 5 to 10 knots, becoming southeast. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters light chop. A slight chance of showers in the morning, then a slight chance of showers and thunderstorms through the night.

Winds and waves higher in and near thunderstorms.

---

AMZ470-472-474-010945
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM
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
238 PM EDT Sat Oct 31 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH SUNDAY EVENING

REST OF TODAY
East winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: East 7 feet at 7 seconds. A chance of showers.

TONIGHT
East winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 7 seconds. A slight chance of showers in the evening, then a chance of showers after midnight.

SUNDAY
East winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 8 seconds. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.

SUNDAY NIGHT
East winds 20 to 25 knots, diminishing to 15 to 20 knots after midnight. Seas 7 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms.

MONDAY AND MONDAY NIGHT
East winds 15 to 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: East 8 feet at 8 seconds. Showers with a slight chance of thunderstorms.

TUESDAY THROUGH WEDNESDAY
Southeast winds 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: East 7 feet at 8 seconds and northeast 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms.

Winds and seas higher in and near thunderstorms.