FZUS52 KJAX 191530 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 1130 AM EDT Tue May 19 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. AMZ400-200630- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 1130 AM EDT Tue May 19 2026 .SYNOPSIS... Atlantic high pressure centered near Bermuda will continue to extend its axis westward across the southeastern states through the end of the week. This feature will maintain a prevailing east to southeasterly wind flow across our local waters during the next several days. A frontal boundary will briefly stall over the southeastern states late this week. Caution level wind speeds will be possible for the near shore waters during the late afternoon and evening hours from Friday through early next week as Atlantic high pressure becomes reinforced near Bermuda. Only isolated showers and perhaps a few thunderstorms are expected through Saturday, with a slight increase in coverage possible towards Memorial Day. .GULF STREAM... The approximate location of the west wall of the Gulf Stream as of May 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. 76 nautical miles east southeast of St Simons Island. This data derived from NCEP Global RTOFS model. $$ AMZ450-452-454-200630- 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- 1130 AM EDT Tue May 19 2026 .REST OF TODAY...East winds increasing to around 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. Intracoastal waters becoming a moderate chop. .TONIGHT...East southeast winds around 15 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal waters becoming mostly smooth. .WEDNESDAY...East southeast winds 5 to 10 knots, becoming east and increasing to 10 to 15 knots during the afternoon. Seas around 3 feet. Wave Detail: East 3 feet at 8 seconds. Intracoastal waters becoming a light chop. .WEDNESDAY NIGHT...Southeast winds 10 to 15 knots, decreasing to 5 to 10 knots after midnight. Seas 2 to 3 feet. Wave Detail: East 3 feet at 8 seconds. Intracoastal waters becoming mostly smooth. .THURSDAY...East southeast winds 5 to 10 knots, becoming east and increasing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 9 seconds. Intracoastal waters becoming a light chop. .THURSDAY NIGHT...Southeast winds 10 to 15 knots, becoming south 5 to 10 knots after midnight. Seas around 3 feet. Wave Detail: Southeast 3 feet at 9 seconds. Intracoastal waters becoming mostly smooth. .FRIDAY...South southeast winds 5 to 10 knots, becoming east southeast and increasing to 15 to 20 knots late in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Intracoastal waters becoming choppy. .FRIDAY NIGHT...Southeast winds 15 to 20 knots, becoming south southeast 10 to 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Intracoastal waters becoming a light chop. .SATURDAY...South southeast winds around 10 knots, becoming east southeast and increasing to 15 to 20 knots during the late afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Intracoastal waters becoming choppy. $$ AMZ470-472-474-200630- Waters from Altamaha Sound GA to Fernandina BeachFL 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- 1130 AM EDT Tue May 19 2026 .REST OF TODAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. .TONIGHT...Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. .WEDNESDAY...East winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 8 seconds. .WEDNESDAY NIGHT...Southeast winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 8 seconds. .THURSDAY AND THURSDAY NIGHT...South southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 9 seconds. .FRIDAY THROUGH SATURDAY...Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 9 seconds. A slight chance of showers and thunderstorms. Winds and seas higher in and near thunderstorms. $$