Marine Weather Net

Florida Bay including Blackwater and Buttonwood Sounds Marine Forecast


THIS AFTERNOON

ESE
WINDS
5 - 10
KNOTS

TONIGHT

ENE
WINDS
5 - 10
KNOTS

WEDNESDAY

ENE
WINDS
5 - 10
KNOTS

WEDNESDAY NIGHT

ENE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ031 Forecast Issued: 1037 AM EDT Tue Sep 23 2025

This Afternoon...East To Southeast Winds 5 To 10 Knots, Becoming East And Decreasing To Near 5 Knots. Bay Waters Smooth To A Light Chop, Becoming Smooth. Numerous Showers And Scattered Thunderstorms.
Tonight...Northeast To East Winds 5 To 10 Knots, Increasing To Near 10 Knots. Bay Waters Smooth To A Light Chop, Becoming A Light Chop. Scattered Showers And Isolated Thunderstorms.
Wednesday...Northeast To East Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. Scattered Showers And Isolated Thunderstorms.
Wednesday Night...Northeast To East Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. Isolated Showers And Thunderstorms.
Thursday...Northeast To East Winds Near 5 Knots, Becoming Variable. Bay Waters Smooth. Scattered Showers And Isolated Thunderstorms.
Thursday Night...Variable Winds Near 5 Knots. Bay Waters Smooth. Scattered Showers And Isolated Thunderstorms.
Friday...Variable Winds Near 5 Knots. Bay Waters Smooth. Scattered Showers And Isolated Thunderstorms.
Friday Night...West To Northwest Winds Near 5 Knots, Becoming North To Northeast. Bay Waters Smooth. Scattered Showers And Isolated Thunderstorms.
Saturday...Northwest To North Winds Near 5 Knots, Becoming West To Northwest And Increasing To 5 To 10 Knots. Bay Waters Smooth, Becoming Smooth To A Light Chop. Scattered Showers And Isolated Thunderstorms.
Saturday Night...Northwest To North Winds 5 To 10 Knots, Becoming North To Northeast. Bay Waters Smooth To A Light Chop. Scattered Showers And Isolated Thunderstorms.
SHARE THIS PAGE:           
Area Forecast Discussion
National Weather Service Key West FL
1101am EDT Tuesday September 23 2025

Marine
Issued at 1038am EDT Tuesday September 23 2025 There are no watches, warnings, or advisories in effect for the Florida Keys coastal waters. However, a Coast Flood Statement in effect for the Upper Keys means that mariners should be prepared for less clearance underneath fixed bridges. From synopsis, rain and thunder chances will remain elevated through the rest of today as a moisture surge and low-level trough continue to push through the Florida Keys marine zones. High pressure pushing off the Eastern Seaboard will support light to gentle breezes through the rest of the work week, along with a return to near normal rain chances for tonight through Saturday.

Climate
On this day in Keys Weather History in 2023, the daily record rainfall of 1.93" was recorded in Marathon. Rainfall data for Marathon dates back to 1950.

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