Marine Weather Net

Hawk Channel from Craig Key to West End of Seven Mile Bridge Marine Forecast


TODAY

E
WINDS
10 - 15
KNOTS

TONIGHT

E
WINDS
15
KNOTS

FRIDAY

ESE
WINDS
10 - 15
KNOTS

FRIDAY NIGHT

ENE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ043 Forecast Issued: 426 AM EDT Thu Oct 15 2026

Today...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Nearshore Waters A Light To Moderate Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Tonight...East Winds Near 15 Knots. Seas 2 To 3 Feet. Nearshore Waters A Moderate Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Friday...East To Southeast Winds 10 To 15 Knots, Becoming East And Decreasing To Near 10 Knots. Seas Around 2 Feet. Nearshore Waters A Light To Moderate Chop, Becoming A Light Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Friday Night...Northeast To East Winds 5 To 10 Knots, Decreasing To Near 5 Knots. Seas 1 To 2 Feet, Subsiding To Around 1 Foot. Nearshore Waters Smooth To A Light Chop, Becoming Smooth. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Saturday...Northeast Winds Near 5 Knots, Becoming North To Northeast And Increasing To Near 10 Knots In The Afternoon. Seas Around 1 Foot, Building To 1 To 2 Feet. Nearshore Waters Smooth, Becoming A Light Chop. Showers Likely With A Chance Of Thunderstorms.
Saturday Night...North To Northeast Winds 10 To 15 Knots, Becoming Northeast And Increasing To 15 To 20 Knots. Seas 1 To 2 Feet, Building To 2 To 3 Feet, Except Building To 3 To 4 Feet, Occasionally To 5 Feet West Of Cosgrove Shoal Light. Nearshore Waters A Light To Moderate Chop, Becoming Choppy. Showers With A Chance Of Thunderstorms.
Sunday...Northeast To East Winds Near 20 Knots, Increasing To 20 To 25 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet, Except 4 To 5 Feet, Occasionally To 6 Feet West Of Cosgrove Shoal Light. Nearshore Waters Rough, Becoming Very Rough. Showers With A Chance Of Thunderstorms.
Sunday Night...Northeast To East Winds 20 To 25 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet, Except 4 To 5 Feet, Occasionally To 7 Feet West Of Cosgrove Shoal Light. Nearshore Waters Very Rough. Showers With A Chance Of Thunderstorms.
Monday...Northeast To East Winds 20 To 25 Knots, Decreasing To 15 To 20 Knots In The Afternoon. Seas 2 To 4 Feet, Occasionally To 5 Feet, Except 3 To 5 Feet, Occasionally To 7 Feet West Of Cosgrove Shoal Light. Nearshore Waters Very Rough, Becoming Choppy. A Chance Of Thunderstorms. Showers Likely.
Monday Night...Northeast To East Winds 20 To 25 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet, Except 4 To 5 Feet, Occasionally To 7 Feet West Of Cosgrove Shoal Light. Nearshore Waters Very Rough. Showers Likely With A Chance Of Thunderstorms.
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Area Forecast Discussion
National Weather Service Key West FL
458am EDT Thu Oct 15 2026

Issued at 457am EDT Thu Oct 15 2026 CIMSS products shows mean layer ridging remains in place across the Southeast U.S. extending eastward into the western North Atlantic. The Keys remain on the southern flank of this ridge along with a weak surface trough. Marine platforms surrounding the Island Chain are recording mainly east breezes of 10 to 15 knots. GOES 19 Total Precipitable Water (TPW) products shows estimated PWAT (Precipitable Water) values of 1.8 to 2 inches across the Keys. KBYX radar has been active for much of the night with isolated showers continuing to move west to northwest through the western Straits of SE Gulf between 15 to 20 knots early this morning. In addition, new activity is beginning to develop just north of Cuba south of the Cay Sal Bank drifting northwestward towards the distant Straits. Temperatures along the Island Chain are in the lower to mid 80s and dew points are in the mid 70s.

Short Term - Tonight Through Friday
CAST... The aforementioned high will continue to remain in place across the Southeast U.S. today. The high will slowly continue drifting eastward farther into the western North Atlantic while weakening through tonight. This will continue to promote mainly gentle to moderate east breezes, occasionally east to southeast breezes across the Keys with a potential period of moderate to fresh breezes again tonight across the Straits of Florida and potentially the SE Gulf. Plentiful moisture remains in place across the Keys which will keep rain chances elevated today with 40% for today and tonight along the Island Chain. Nonetheless, the heat will be back for today and tonight with highs in the upper 80s and overnight lows remaining quite warm in the lower 80s. Dew points will remain in the mid to upper 70s keeping the heat index values near 100 degrees.

Marine
Issued at 457am EDT Thu Oct 15 2026 There are currently no watches, warnings, or advisories in effect across the Florida Keys coastal waters. From synopsis, high pressure centered just off the Southeast coastline will interact with a weak surface trough that remains across the area. This will promote gentle to moderate easterly breezes over the for at least the next 24 hours. Late week, a second, much stronger front, is expected to drive southeastward through the Gulf towards the Florida Keys over the weekend before stalling. Fresh to strong breezes, along with squally conditions, will be possible for the latter part of the weekend. A Small Craft Advisory likely will be required for portions or all of the Florida Keys marine zones by Sunday.

Climate
On this day in 2018, the daily record warm low temperature of 82F was recorded in Key West. Temperature records for Key West date back to 1872. Also, on this day in 2014, the daily record warm low temperature of 81F was recorded in Marathon. Temperature records for Marathon date back to 1951.

NOAA Key West FL Office: Watches - Warnings - Advisories
FL...None. GM...None.