Marine Weather Net

Florida Bay including Blackwater and Buttonwood Sounds Marine Forecast


TODAY

ESE
WINDS
10
KNOTS

TONIGHT

ESE
WINDS
10
KNOTS

TUESDAY

SE
WINDS
5 - 10
KNOTS

TUESDAY NIGHT

SE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ031 Forecast Issued: 431 AM EDT Mon Jun 29 2026

Today...East To Southeast Winds Near 10 Knots. Bay Waters A Light Chop. A Slight Chance Of Showers And Thunderstorms.
Tonight...East To Southeast Winds Near 10 Knots, Decreasing To 5 To 10 Knots. Bay Waters A Light Chop, Becoming Smooth To A Light Chop. A Slight Chance Of Showers And Thunderstorms.
Tuesday...Southeast Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Tuesday Night...Southeast Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. A Slight Chance Of Showers And Thunderstorms.
Wednesday...East To Southeast Winds Near 5 Knots. Bay Waters Smooth. A Slight Chance Of Showers And Thunderstorms.
Wednesday Night...East To Southeast Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. A Slight Chance Of Showers And Thunderstorms.
Thursday...East To Southeast Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. A Chance Of Showers And Thunderstorms.
Thursday Night...East To Southeast Winds Near 10 Knots. Bay Waters A Light Chop. A Chance Of Showers And Thunderstorms.
Friday...East To Southeast Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. A Chance Of Showers And Thunderstorms.
Friday Night...East To Southeast Winds 5 To 10 Knots. Bay Waters Smooth To A Light Chop. A Chance Of Showers And Thunderstorms.
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Area Forecast Discussion
National Weather Service Key West FL
542am EDT Monday Jun 29 2026

Issued at 540am EDT Monday Jun 29 2026 A mostly uneventful night for the Florida Keys. KBYX has remained shower-free for the majority of the night, although some showers are popping up along some boundaries in our waters over the last hour or so. These showers have been light and short fused and so far none have made it to the island chain. Seen on MIMIC PWAT, dry air has moved into the area which is helping limit these showers. Temperatures along the island chain are in the mid 80s with dewpoints in the mid 70s once again making for muggy conditions. Along the Reef, wind observations are easterly at 10 to 15 knots. Today will be similar to previous with chances of showers and thunderstorms but nothing that will last long due to dry air in the area. A frontal boundary is expected to move down Florida later tonight but not much is expected for us to change. As the frontal boundary weakens the high that has been controlling our winds, they will start to slacken. Temperatures and dewpoints will remain similar to the following days so muggy and warm conditions will continue.

Marine
Issued at 540am EDT Monday Jun 29 2026 No watches, warnings, or advisories are currently in effect for the Florida Keys waters. From synopsis, a broad high pressure system centered over the North Atlantic will continue to extend westward to the Florida Peninsula through today. This will support bouts of light to gentle breezes that may freshen to gentle to moderate at times. Starting late tonight, a frontal boundary will press south across the Florida Peninsula and stall across central Florida. This will act to weaken the high and allow for slackening breezes through Thursday. Thereafter, breezes will resume a cycle of overnight peaks and daytime lulls.

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