Marine Weather Net

Straits of Florida from Ocean Reef to Craig Key out 20 NM Marine Forecast


THIS AFTERNOON

VARIABLE
WINDS
5 KNOTS

TONIGHT

VARIABLE
WINDS
5 - 10
KNOTS

WEDNESDAY

ENE
WINDS
5 - 10
KNOTS

WEDNESDAY NIGHT

ENE
WINDS
10
KNOTS

The Marine Weather Forecast In Detail:
GMZ052 Forecast Issued: 1019 AM EDT Tue Jun 02 2026

This Afternoon...Variable Winds Near 5 Knots. Seas Around 1 Foot. Wave Detail: East 1 Foot At 3 Seconds. A Chance Of Showers And Thunderstorms.
Tonight...Variable Winds 5 To 10 Knots. Seas Around 1 Foot. Wave Detail: Northeast To East 1 Foot At 3 Seconds. A Chance Of Showers And Thunderstorms.
Wednesday...Northeast To East Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: East 1 Foot At 3 Seconds. Showers Likely With A Chance Of Thunderstorms.
Wednesday Night...Northeast To East Winds Near 10 Knots. Seas 1 To 2 Feet. Showers Likely With A Chance Of Thunderstorms.
Thursday...East Winds Near 10 Knots. Seas 2 To 3 Feet. Showers Likely With A Chance Of Thunderstorms.
Thursday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms.
Friday...Northeast To East Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms.
Friday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. A Chance Of Showers And Thunderstorms.
Saturday...Northeast To East Winds Near 10 Knots. Seas Around 2 Feet. A Slight Chance Of Showers And Thunderstorms.
Saturday Night...East Winds Near 10 Knots. Seas 1 To 2 Feet. A Chance Of Showers With A Slight Chance Of Thunderstorms.
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Area Forecast Discussion
National Weather Service Key West FL
1012am EDT Tuesday Jun 2 2026

Issued at 1010am EDT Tuesday Jun 2 2026

Morning across the Keys opened with rather unassuming weather.Cloud cover is much more diffuse per GOES East satellite imagery, which did allow temperatures to drop a bit more overnight compared to yesterday. However, clear skies will not help how it feels outdoors. Dew points linger in the mid to upper 70s. The wind flow across the Keys continues to be stagnant with light and variable conditions across the island chain. The morning KKEY sounding sampled an environment with nearly 2 inches of PWAT, above the 90th percentile for the day. Amidst the amount of moisture, the surface to 10 kft mean layer wind was calculated as weaker than 3 knots. Weather may appear ideal across the Keys, except the light winds and clear skies suggest cloud lines may become a problem again this afternoon. Daytime heating over South Florida may also send boundaries into the Upper Keys. In light of these conditions, the current forecast will be maintained. Be on the lookout for a possible cloud line this afternoon!

Issued at 437am EDT Tuesday Jun 2 2026

A weak pressure gradient will persist today, leading to winds being light and variable. The combination of a small high developing over the Gulf of America and day time heating over the mainland should force winds northwesterly for most island locations. Cloud line convection will again be possible and mainland activity will have a fair chance of affecting the Upper Keys. The weak flow and sufficient sunshine will push temperatures up to slightly below normal with dew points remaining in the mid 70s.

Through the remainder of the week, rain and thunder chances will trend upwards to well above normal. This is due to the swath of deep moisture remaining across our area and a frontal boundary steadily pushing southward towards the Keys. Rain chances will likely peak mid week as the boundary reaches South Florida and the Keys and the tail end of the lower level trough scraps by our area. In addition, some upper level diffluence may be present at the same time, further supporting convective activity. The combination of increased cloud cover and convective activity should keep temperatures near normal.

Heading into the weekend, the surface boundary will likely push past the Keys as robust high pressure builds across the eastern United States and surface troughing lifts out along the Atlantic Coast. Dew points and rain chances should trend downwards, but how far depends how far the surface high is able to press across our area. Adding to the uncertainty will be deep layered moisture remaining quite high and possible upper level troughing moving into Florida.

Marine
Issued at 437am EDT Tuesday Jun 2 2026

No watches, warnings, or advisories are in effect for the Florida Keys coastal waters. A surface low will migrate eastward off of the southeast Atlantic coast over the next few days. This will keep a weak and narrow surface ridge across the Bahamas and the Keys, resulting in light and variable breezes on Keys waters. Expect well above normal shower chances with isolated to scattered thunderstorms due to considerable deep moisture. From mid week and beyond, broad high pressure will build eastward off of the eastern United States and bring about modest freshening northeast to easterly breezes and rain chances slipping back to seasonal norms by the weekend.


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