Bayside and Gulf side from Craig Key to West End of Seven Mile Bridge Marine Forecast
| This Afternoon...West To Northwest Winds Near 15 Knots. Seas 2 To 4 Feet. Nearshore Waters A Moderate Chop. Isolated Showers And Thunderstorms. |
| Tonight...West To Northwest Winds Near 15 Knots, Becoming Northwest 10 To 15 Knots After Midnight. Seas 2 To 3 Feet, Subsiding To 1 To 2 Feet. Nearshore Waters Choppy, Becoming A Light To Moderate Chop. Scattered Showers And Isolated Thunderstorms. |
| Wednesday...North To Northeast Winds Near 10 Knots, Becoming Northwest To North And Briefly Decreasing To 5 To 10 Knots In The Afternoon. Seas 1 To 2 Feet. Nearshore Waters A Light Chop, Becoming Smooth To A Light Chop. Scattered Showers And Isolated Thunderstorms. |
| Wednesday Night...Northwest To North Winds Near 10 Knots, Becoming North To Northeast. Seas 1 To 2 Feet. Nearshore Waters A Light Chop. Scattered Showers And Isolated Thunderstorms. |
| Thursday...North To Northeast Winds Near 10 Knots, Briefly Decreasing To 5 To 10 Knots In The Afternoon. Seas 1 To 2 Feet, Subsiding To Around 1 Foot. West Of The Marquesas Keys, Seas 1 To 2 Feet. Nearshore Waters A Light Chop, Becoming Smooth To A Light Chop. Scattered Showers And Isolated Thunderstorms. |
| Thursday Night...Northeast Winds Near 10 Knots, Increasing To 10 To 15 Knots. Seas 1 To 2 Feet, Except Building To 2 To 3 Feet West Of The Marquesas Keys. Nearshore Waters A Light Chop, Becoming A Light To Moderate Chop. Scattered Showers And Isolated Thunderstorms. |
| Friday...Northeast To East Winds Near 10 Knots. Seas 1 To 2 Feet. West Of The Marquesas Keys, Seas 2 To 3 Feet, Subsiding To Around 2 Feet. Nearshore Waters A Light Chop. Scattered Showers And Isolated Thunderstorms. |
| Friday Night...Northeast To East Winds Near 10 Knots, Becoming East To Southeast 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light Chop, Becoming A Light To Moderate Chop. Scattered Showers And Isolated Thunderstorms. |
| Saturday...Southeast To South Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop. Scattered Showers And Isolated Thunderstorms. |
| Saturday Night...Southeast Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop. Scattered Showers And Isolated Thunderstorms. |
| Area Forecast Discussion National Weather Service Key West FL 231pm EDT Tuesday September 30 2025 .PREVIOUS Issued at 1125am EDT Tuesday September 30 2025 Mostly clear skies prevail across the Florida Keys on this final morning of September. GOES-19 visible imagery notes fair weather cumulus dotted along broken lines stretched across the island chain. A small meso low circulation can also be spotted in our deep Gulf waters drifting southeast. Meanwhile, KBYX radar detects a few shallow showers pulsing along these boundaries. These showers have generally remained offshore resulting in a fairly dry start to the day. Moderate west to northwest breezes are observed along the Reef and after a brief uptick from this morning seem to be fairly stable for now. While the drier conditions and northerly influenced wind direction may make it seem like a fall day outside, temperatures in the mid to upper 80s remind us that it is still September, especially with dewpoints in the mid 70s. This morning's KKEY 12z sounding was another dry one with a PW value below the 25th percentile for today. CIMSS MIMIC PW confirms this with a clear streak of low values situated over most of the island chain. The current low level wind direction will continue to advect dry, modified continental air over the Keys today resulting in slight chance Probability of Precipitation for the rest of the day. As Tropical Storm Imelda is forecast to drift east into the North Atlantic, breezes will gradually slacken and veer starting tonight. Moderate west to northwest breezes will become gentle to moderate and more northerly overnight into tomorrow. Residual moisture from Imelda as well as a more moist wind direction will slide Probability of Precipitation up to more seasonable values later tonight and into tomorrow. High pressure building along the Eastern Seaboard will gradually shift conditions back to near normal by the end of the week. .FORECAST... Issued at 407am EDT Tuesday September 30 2025 As Imelda continues to move north and then makes it sharp turn to the east, high pressure will gradually fill in behind. This will allow the pressure gradient to eventually lessen and winds will slacken. At the same time, winds will periodically fluctuate between northwest to northeast as the building ridge battles with daytime heating across the Florida Peninsula at times. Moisture wrapping around the broad cyclonic envelop associated with Imelda will occasionally pivot across the region. That being said, rain chances will still be near normal. The only exception may be the Upper Keys where convection will tend to drift off the mainland, given a northerly steering flow. As we go through the first several days of October, the high will build as it pushes east and press against the Keys. This will allow for easterly winds to return, however, the exact strength will depend on how far south the high builds. The ECMWF (European Centre for Medium-Range Weather Forecasts) at this point as a weaker high and thus lighter winds with a southeast tendency. The GFS (Global Forecast System) is much stronger with the potential of moderate to fresh breezes returning. Another feature we will have to eventually keep an eye on will be a quasi-stationary frontal boundary that will develop as the high builds. This feature should stay well to our north but it could have impacts to our rain chances later in the period. Marine Issued at 1125am EDT Tuesday September 30 2025 A Small Craft Advisory remains in effect for the eastern Straits of Florida. From synopsis, Tropical Storm Imelda, located east of the northeast coast of Florida, will continue to move slowly northward, then make a sharp eastward turn today into the west- central North Atlantic. Moderate to fresh northwesterly breezes will slacken by tonight. High pressure over the Eastern Seaboard will slowly slide eastward into the western North Atlantic, with mainly gentle northwesterly breezes eventually veering to the northeast to east for the middle to latter part of the work week. Winds will then clock around towards the southeast towards the end of the week and into the upcoming weekend. NOAA Key West FL Office: Watches - Warnings - Advisories FL...None. GM...Small Craft Advisory until 9pm EDT this evening for GMZ052-072. |
Key West FL Radar
Southeast Radar