Marine Weather and Tide Forecast for North Key Largo, FL

UPDATE
Issued at 525 PM EDT Sun Oct 25 2026

Forecast remains generally on track, with gusty winds across South Florida and fast-moving showers continuing to push inland from the Atlantic waters. The primary concerns remain hazardous marine and coastal conditions, including rough seas, life-threatening rip currents, and coastal flooding during high tide. A Gale Warning is now in effect beginning tonight for the Atlantic waters, where frequent gusts of 35-40 kts are possible through Tuesday. A Coastal Flood Warning has also been issued for early Monday morning through Tuesday along the Atlantic coast, as confidence increases in the potential for major coastal flooding driven by strong onshore flow and elevated seas combining with the peak King Tides.
Remember to never drive, walk, or wade across flooded roads.

Scattered to numerous showers will continue to move across the region tonight into Monday. While overall rain chances are trending lower heading into the beginning of the work week, isolated flash flooding cannot be completely ruled out, particularly where showers repeatedly move over the same locations.
Overnight lows will range from the mid 70s along the East Coast to the low 70s along the West Coast, with upper 60s possible in the Lake region.

SHORT TERM
(Today through Monday)
Issued at 324 AM EDT Sun Oct 25 2026

A complex weather pattern is set up for today and into early this coming week as an omega block ridge over the central U.S. creates a primarily meridional flow pattern with steady northerly flow in the mid-levels and upper-levels of the atmosphere. An elongated north-to- south trough is set up just east of this ridge block over the western Atlantic and extending into the Atlantic coastline across the Eastern Seaboard. Additionally, this results in surface high pressure underneath this upper-level setup being stout as well, with a strong pressure gradient setting up that is expected to bring increasingly gusty winds to South Florida. The surface high will be centered in the Northeast U.S. with a surface trough off the coast.
This pattern could lead to us approaching Wind Advisory criteria on Monday, especially along the east coastline, but probabilities are not high enough currently to result in enough confidence to issue an advisory yet. Regardless, sustained NE winds of 20-25 mph and gusts of 30-35 mph are likely and occasional gusts to 40 mph are certainly possible.

In terms of convective potential today, the main drivers will be vorticity advection from the nearby elongated trough and speed/friction convergence created by strong NE flow rushing into less strong winds over land. This type of convergence can lead to numerous pop up showers and storms, but typically not as long lasting or tall as in a typical low level convergence setup.
Nevertheless, expect scattered to numerous showers today primarily across the east coast metro with some embedded storms. With how scattered convection is expected to be along with the brisk flow leading to fast-moving showers and storms, concerns are low for excessive rainfall across the region. Additionally, deep convection is typically hard to come by in these types of setups. However, an isolated occurrence or two for localized flooding still cannot be ruled out due to training activity, but the risk overall across the region is not high.

As we move into Monday, most of the ensemble members and short range model guidance show the deepest moisture advecting offshore and thus there will be an even lesser risk for convective and hydro hazards on Monday. Some level of scattered shower activity is still likely, but less than today and once again any convection will be fast moving. High temperatures are expected in the low to mid 80s for most areas with parts of Southwest Florida reaching the upper 80s.

LONG TERM
(Monday night through Saturday)
Issued at 324 AM EDT Sun Oct 25 2026

While not much of a legend down here as it is up in the Great Lakes, it appears that the gales of November may indeed come early for South Florida. Breezy 25 to 35 mph wind gusts will continue to be common Monday night through Tuesday morning. Strong surface high pressure over the mid-Atlantic states will continue to induce a tight pressure gradient along the Florida Atlantic coast through the end of the week. As a result, breezy conditions will continue at least through Wednesday. As discussed in the short term discussion, whether a wind advisory will also be needed for the Monday night and Tuesday period is still up for debate. It seems that the most likely areas to see sustained winds of 30 mph or greater is along the immediate coasts of Broward, Dade, and Palm Beach counties. Probabilities for advisory criteria winds are only at about 40%, so most areas will likely only see sustained winds of around 20 mph. Pressure gradients begin to relax near the middle of the week, which will finally lead to some calming of the winds. However, surface high pressure along the eastern seaboard will keep the same overall pattern in place, with northeast winds persisting into next weekend at around 10 to 15 mph.

Ensemble clusters are showing relatively good agreement regarding the upper level pattern heading into the middle of the week. A series of shortwave perturbations moving over the intermountain west will begin to flatten and steer high pressure over the Gulf and Deep South. Meanwhile, a cut off low over the Bahamas will begin to eject out into the Atlantic by Wednesday, which should allow for the weather to become a little less unsettled. As the mid- level ridge begins to exert greater influence over South Florida, chances of precipitation will decline and high temperatures look to climb back up into the upper 80s. The cut off low near the Bahamas will help transport some increased moisture into the northern Caribbean, with PWATs looking to climb to near 1.8 inches over South Florida (if the systems stays close enough to our area). Overall, this northeasterly flow pattern will favor scattered showers and storms coming off of the Gulf Stream waters for most of the week. Lightning and locally heavy rainfall will be the main threats, but there is currently no risk of excessive rainfall after Tuesday. A more typical sea breeze induced convective pattern will likely return once northeast winds weaken towards the end of the week.

The potential for moderate and major tidal flooding may continue during the middle portions of the week. This tidal flooding may also be exacerbated by coastal showers and strong northeast winds, which could lead to significant water rises along the far eastern metro areas. While the peak tides will be during the beginning to middle of the week, moderate coastal flooding may persist through the end of the week as we come out of this full moon phase.

AVIATION
(00Z TAFS)
Issued at 646 PM EDT Sun Oct 25 2026

Windy conditions continue for all sites through the period, with sustained northeasterly winds up to 20 kts and gusts up to 30 kts.
VFR conditions should prevail, although quick-moving showers could result in very brief vis/cig reductions.

MARINE
Issued at 525 PM EDT Sun Oct 25 2026

Hazardous marine conditions will continue through midweek as strong northeasterly winds persist across the local waters. Frequent gusts to gale force are expected from tonight through Tuesday across the Atlantic waters, where a Gale Warning is in effect beginning tonight. Small Craft Advisory conditions will continue across the Gulf waters and Lake Okeechobee through at least Tuesday night.
Seas are forecast to peak at 6 to 9 feet in the Gulf and 10 to 14 feet across the Atlantic waters tonight into Monday. Scattered to numerous showers and storms are also expected to develop across the Atlantic waters over the next several days, with heavy rainfall, lightning, and locally higher seas possible with any storm. Hazardous seas and breezy conditions should gradually improve toward the end of the week.

BEACHES
Issued at 525 PM EDT Sun Oct 25 2026

A high risk of rip currents will persist along all Atlantic beaches through at least midweek. Dangerous surf heights of 10 to 12 feet are possible across the Palm Beaches through at least Tuesday.

Strong onshore flow and elevated seas, combined with King Tides associated with the full moon, will increase the threat of coastal flooding along the Atlantic coast. Moderate coastal flooding is expected during periods of high tide, with locally major flooding possible in the most vulnerable areas. A Coastal Flood Warning is in effect along the Atlantic coast for Monday through Tuesday due to the potential for significant coastal flooding.

PRELIMINARY POINT TEMPS/POPS
Miami 75 82 75 82 / 70 60 60 70 West Kendall 74 84 75 84 / 70 50 50 60 Opa-Locka 74 82 75 83 / 70 60 50 70 Homestead 74 84 74 84 / 70 60 60 70 Fort Lauderdale 75 81 75 81 / 80 60 60 80 N Ft Lauderdale 75 82 75 82 / 80 60 60 80 Pembroke Pines 74 83 74 83 / 70 60 50 70 West Palm Beach 74 82 75 82 / 70 50 50 70 Boca Raton 74 82 75 82 / 70 60 60 80 Naples 70 85 70 85 / 0 0 0 0

MFL WATCHES/WARNINGS/ADVISORIES
FL...Coastal Flood Advisory until 2 AM EDT Monday for FLZ168-172-173.

High Rip Current Risk through late Tuesday night for FLZ168-172- 173.

High Surf Advisory until 2 AM EDT Wednesday for FLZ168.

Coastal Flood Warning from 2 AM Monday to 8 PM EDT Tuesday for FLZ168-172-173.

AM...Small Craft Advisory until 2 AM EDT Wednesday for AMZ610.

Small Craft Advisory until 8 PM EDT this evening for AMZ630-650- 651-670-671.

Small Craft Advisory from 8 PM Tuesday to 2 AM EDT Wednesday for AMZ630-650-651-670-671.

Gale Warning until 8 PM EDT Tuesday for AMZ630-650-651-670-671.

GM...Small Craft Advisory until 2 AM EDT Wednesday for GMZ656-657-676.