Marine Weather Net

Straits of Florida from Craig Key to West End of Seven Mile Bridge Out 20 NM Marine Forecast


20 - 25




10 - 15


10 - 15

The Marine Weather Forecast In Detail:
GMZ053 Forecast Issued: 416 PM EST Sun Jan 16 2022

Tonight...West To Northwest Winds 20 To 25 Knots. Seas 6 To 10 Feet. Scattered Showers And Isolated Thunderstorms In The Evening, Then Isolated Showers After Midnight.
Monday...Northwest Winds Near 15 Knots. Seas 6 To 10 Feet Subsiding To 5 To 8 Feet In The Afternoon. Isolated Sprinkles In The Morning.
Monday Night...Northwest To North Winds 10 To 15 Knots. Seas 4 To 7 Feet.
Tuesday...Northeast Winds 10 To 15 Knots. Seas 3 To 5 Feet.
Tuesday Night...Northeast To East Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Wednesday...East Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Wednesday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet.
Thursday...Northeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Isolated Showers.
Thursday Night...Northeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Isolated Showers.
Friday...Northeast Winds Near 5 Knots Becoming Northwest To North. Seas Around 1 Foot. Isolated Showers.
Friday Night...Northwest To North Winds 15 To 20 Knots. Seas 2 To 4 Feet. Isolated Showers.
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Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas: GMZ005
416 PM EST Sun Jan 16 2022

Fresh to strong northwest breezes will prevail tonight into Monday, becoming moderate from the north to northeast Monday night. Breezes will veer toward the east and relax Tuesday through Wednesday, as weak high pressure moves across the Southeastern states and into the western Atlantic.

Gulf Stream
The Approximate Shoreward Edge of the Gulf Stream as of January 15...
- 30 NM South of Dry Tortugas Light...on Loggerhead Key.
- 11 NM South of Cosgrove Shoal the Marquesas Keys.
- 7 NM South of Sand Key Key West.
- 4 NM South of Looe Big Pine Key.
- 6 NM South of Sombrero Key Marathon.
- 9 NM Southeast of Alligator Reef Islamorada.
- 12 NM Southeast of Molasses Reef Key Largo.
Area Forecast Discussion
National Weather Service Key West FL
140pm EST Sunday Jan 16 2022

The squall line pushed thorugh the Florida Keys this morning without much fanfare. Multiple gusts in the neighborhood of 35 knots plus were noticed, but overall the line was well behaved. A few strong discrete cells developed in advance of the line over Florida Bay, but are in the process of being overtaken by the Squall line. The cold front is just beginning to enter the Florida Keys Gulf waters, and will likely sweep through by this afternoon. Thereafter, winds will veer from the west to northwest and remain above or near small craft advisory through the evening and overnight before decreasing tomorrow morning.

Post frontal, much drier and cooler air will filter over the islands and coastal waters, which will effectively end any precipitation chances through at least thursday of next weeks. Tuesday morning will likely be the bottom, with low temperatures ranging from the mid 50s to around 60, with colder temperatures advecting off the mainland possible dropping the upper Keys a little lower. Too early yet to make that distinction in the forecast package. Tuesday morning, surface ridging building in behind the trough will move over the southeast CONUS, which will begin to veer winds to east of north, and then to the east by Wednesday as the ridge moves off into the Atlantic off the southeast coast. Therefore, by Wednesday morning low temperatures will begin to creep upwards into Friday.

In the Friday/Saturday timeframe, the GSMs are generally showing another front moving through the Gulf and Florida Keys. The agreement is not there at this time to add any specificity to the longer range forecast, but it appears a weak front may bridge over the area on Friday to Saturday, as Gulf low develops and pushes a stronger front through the area on Sunday into Monday night.

A small craft advisory is in effect for all Florida Keys coastal waters likely through this evening and overnight. Strong west to northeast winds are expected behind the cold front currently moving through the islands and coastal waters, and should remain strong out of the northwest overnight. By tomorrow afternoon, winds will begin to slowly decrease out of the northwest becoming more moderate to fresh. As the week progresses, winds will slowly clock from northwest to northeast into Tuesday evening, and out of the east by Wednesday morning. No precipitation is expected after this evening through at least Friday.

NOAA Key West FL Office: Watches - Warnings - Advisories
FL...Wind Advisory until 4pm EST this afternoon for FLZ076>078.

GM...Small Craft Advisory for GMZ031>035-042>044-052>055-072>075.