East Cape Sable to Chokoloskee out 20 to 60 NM Marine Forecast
| Overnight...Southeast To South Winds 10 To 15 Knots. Seas Around 1 Foot, Building To 1 To 2 Feet. Wave Detail: Southeast To South 1 Foot At 3 Seconds. Showers Likely With A Chance Of Thunderstorms. |
| Tuesday...South To Southwest Winds Near 10 Knots, Decreasing To 5 To 10 Knots. Seas 1 To 2 Feet, Subsiding To Around 1 Foot. Wave Detail: Southeast To South 1 Foot At 3 Seconds. Showers Likely With A Chance Of Thunderstorms. |
| Tuesday Night...Southeast To South Winds 5 To 10 Knots, Increasing To Near 10 Knots. Seas Around 1 Foot. Showers With A Chance Of Thunderstorms. |
| Wednesday...South Winds 5 To 10 Knots. Seas Around 1 Foot. Showers With A Chance Of Thunderstorms. |
| Wednesday Night...Southeast To South Winds 5 To 10 Knots. Seas 1 Foot Or Less. Showers Likely With A Chance Of Thunderstorms. |
| Thursday...Southeast To South Winds Near 5 Knots. Seas 1 Foot Or Less. Showers Likely With A Chance Of Thunderstorms. |
| Thursday Night...East Winds 5 To 10 Knots. Seas 1 Foot Or Less. A Chance Of Showers And Thunderstorms. |
| Friday...Northeast To East Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Chance Of Showers And Thunderstorms. |
| Friday Night...Northeast To East Winds 5 To 10 Knots. Seas Around 1 Foot. Showers Likely With A Chance Of Thunderstorms. |
| Saturday...Northeast To East Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Chance Of Showers And Thunderstorms. |
| Saturday Night...Northeast To East Winds 5 To 10 Knots. Seas Around 1 Foot. A Chance Of Showers And Thunderstorms. |
GMZ005 Synopsis Issued: 1019 PM EDT Mon Sep 21 2026
Synopsis...
Unsettled Weather Will Persist Through The Next Several Days As A Large And Broad Upper Level Trough Sits Across The Gulf Waters And Eastern Seaboard. Breezes Outside Of Convection Will Generally Remain Light To Gentle With Brief Periods Of Moderate Breezes Occurring At Times, Mainly In The Evening And Overnight Hours. Towards The End Of The Week, Breezes Will Shift More Northerly As A Frontal Boundary Gradually Pushes Southward Across Coastal Waters Of The Florida Keys. Seas Will Also Start To Build By The End Of The Week And Into The Weekend As Northeasterly Swell Increases In The Wake Of The Frontal Boundary, Especially In The Straits Of Florida. The Approximate Shoreward Edge Of The Gulf Stream As Of September 15, 2026... 64 Nm South-Southeast Of Dry Tortugas Light, On Loggerhead Key 40 Nm South-Southeast Of Cosgrove Shoal Light, Off The Marquesas Keys 36 Nm South-Southeast Of Sand Key Light, Off Key West 35 Nm Southeast Of Looe Key, Off Big Pine Key 28 Nm Southeast Of Sombrero Key Light, Off Marathon 15 Nm East-Southeast Of Alligator Reef Light, Off Islamorada 8 Nm East-Southeast Of Molasses Reef Light, Off Key Largo 5 Nm East-Southeast Of Carysfort Reef Light, Off Ocean Reef Gulf Stream Information Courtesy Of The Naval Oceanographic Office.
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