Key West, FL Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Key West, FL

April 21, 2024 11:57 PM EDT (03:57 UTC) Change Location
Sunrise 6:58 AM   Sunset 7:53 PM
Moonrise 5:09 PM   Moonset 4:41 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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Marine Forecasts
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GMZ044 Expires:202404220830;;160220 Fzus52 Kkey 220221 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1021 pm edt Sun apr 21 2024
florida bay, hawk channel and straits of florida from ocean reef to south of dry tortugas, and the extreme southeastern gulf of mexico, including the florida keys national marine sanctuary
seas are given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height.
gmz042>044-220830- hawk channel from ocean reef to craig key out to the reef- hawk channel from craig key to west end of seven mile bridge out to the reef- hawk channel from west end of seven mile bridge to halfmoon shoal out to the reef- 1021 pm edt Sun apr 21 2024

Overnight - Variable winds 5 to 10 knots, becoming southeast to south. Seas 1 to 2 feet, subsiding to around 1 foot. NEarshore waters smooth to a light chop.

Monday - Southwest winds 5 to 10 knots, becoming west to northwest and increasing to 10 to 15 knots. Seas building to 1 to 2 feet. NEarshore waters smooth to a light chop, becoming a light to moderate chop. Isolated showers in the afternoon.

Monday night - Northwest to north winds near 15 knots, becoming north to northeast. Seas 1 to 2 feet, except 2 to 4 feet west of cosgrove shoal light. NEarshore waters a moderate chop.

Tuesday - Northeast winds near 15 knots, becoming northeast to east. Seas 2 to 3 feet. NEarshore waters a moderate chop.

Tuesday night - Northeast to east winds 15 to 20 knots, becoming east and decreasing to near 15 knots. Seas 2 to 4 feet. NEarshore waters choppy, becoming a moderate chop. Isolated showers.

Wednesday - East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.

Wednesday night - East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. Isolated showers.

Thursday - East winds near 15 knots, increasing to 15 to 20 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop, becoming choppy.

Thursday night and Friday - East winds 15 to 20 knots. Seas 2 to 4 feet. NEarshore waters choppy.

Friday night - East winds near 20 knots. Seas 3 to 5 feet. NEarshore waters rough.

GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1021 Pm Edt Sun Apr 21 2024

Synopsis - As high pressure over the western north atlantic continues to retreat farther offshore overnight, southeasterly breezes will remain light to gentle across the florida keys coastal waters, becoming variable at times. These light to gentle southeast to south breezes will persist through Monday then will become moderate from the northwest to north Monday afternoon and evening, as a weak frontal boundary slides through south florida and the keys. High pressure building over the southeast will bring moderate easterly breezes back to the keys waters by the middle of the week, with fresh breezes developing by this weekend.
the approximate shoreward edge of the gulf stream is currently unavailable.


7 Day Forecast for Marine Location Near Key West, FL
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Area Discussion for - Key West, FL
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FXUS62 KKEY 220214 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1014 PM EDT Sun Apr 21 2024

New DISCUSSION, MARINE, AVIATION

DISCUSSION
Issued at 1014 PM EDT Sun Apr 21 2024

Surface analysis places a frontal boundary draped across the northern Florida peninsula this evening, and an expansive ridge centered in the central North Atlantic extending across South Florida and the Keys. The front shoved the ridge axis across the forecast area, which has caused winds to slacken and become variable across the island chain and surrounding coastal waters.
This evening's sounding highlighted the chaotic low-level wind field, before becoming west to northwest aloft. A sharp inversion was sampled around 950 mb, with extremely dry air above it.
Interestingly enough, despite the lack of moisture a reverse cloud line has managed to develop along the Lower Keys. Unsurprisingly with the aforementioned dry air, no showers have been detected along this line. KBYX has remained echo-free this evening aside from a thunderstorm that developed on the Mainland earlier that has since dissipated. Overnight, no showers are expected as the dry air will remain in place across the area ahead of the front to our north. Winds will remain light, but will begin to clock around to the west to northwest by midday tomorrow. Skies will remain mostly clear, and when combined with the light winds, could lead to some radiational cooling. The limiting factor will be dew points near 70 degrees, so have kept temperatures for the island chain in the lower to mid 70s. The forecast remains on track and no changes were necessary.

MARINE
Issued at 1014 PM EDT Sun Apr 21 2024

There are no watches, warnings, or advisories in effect for the Florida Keys coastal waters. From synopsis, as high pressure over the western North Atlantic continues to retreat farther offshore overnight, southeasterly breezes will remain light to gentle across the Florida Keys coastal waters, becoming variable at times. These light to gentle southeast to south breezes will persist through Monday then will become moderate from the northwest to north Monday afternoon and evening, as a weak frontal boundary slides through South Florida and the Keys. High pressure building over the Southeast will bring moderate easterly breezes back to the Keys waters by the middle of the week, with fresh breezes developing by the weekend.

AVIATION
(00Z TAFS)
Issued at 1014 PM EDT Sun Apr 21 2024

VFR conditions will prevail at both island terminals through the TAF period. Variable surface winds are expected overnight, then winds will become west to northwest tomorrow morning and gradually increase throughout the day.

CLIMATE
On this day in 2012, the daily record rainfall at Key West (1.99")
and Marathon (2.62") were both set. Rainfall records date back to 1871 in Key West and 1950 in Marathon.

PRELIMINARY POINT TEMPS/POPS
Key West 73 84 72 83 / 0 10 0 10 Marathon 76 87 73 85 / 0 10 10 10

KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
42095 13 mi117 min 77°F 80°F2 ft
SANF1 - Sand Key, FL 15 mi47 min ESE 2.9G5.1 77°F 29.9970°F
KYWF1 - 8724580 - Key West, FL 17 mi57 min 0G1 76°F 81°F30.01


Wind History for Key West, FL
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KEYW KEY WEST INTL,FL 20 sm64 minESE 0410 smA Few Clouds79°F70°F74%30.00
KNQX KEY WEST NAS /BOCA CHICA FIELD/,FL 23 sm64 mincalmPartly Cloudy79°F73°F84%29.99
Link to 5 minute data for KEYW


Wind History from EYW
(wind in knots)
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Tide / Current for Sand Key Lighthouse, Sand Key Channel, Florida
   
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Sand Key Lighthouse
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Sun -- 02:14 AM EDT     0.18 feet Low Tide
Sun -- 05:40 AM EDT     Moonset
Sun -- 06:59 AM EDT     Sunrise
Sun -- 08:23 AM EDT     1.33 feet High Tide
Sun -- 02:42 PM EDT     -0.06 feet Low Tide
Sun -- 06:07 PM EDT     Moonrise
Sun -- 07:52 PM EDT     Sunset
Sun -- 09:04 PM EDT     1.23 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Sand Key Lighthouse, Sand Key Channel, Florida, Tide feet
12
am
0.6
1
am
0.3
2
am
0.2
3
am
0.2
4
am
0.4
5
am
0.7
6
am
1
7
am
1.2
8
am
1.3
9
am
1.3
10
am
1.1
11
am
0.9
12
pm
0.5
1
pm
0.2
2
pm
-0
3
pm
-0.1
4
pm
0.1
5
pm
0.3
6
pm
0.7
7
pm
0.9
8
pm
1.2
9
pm
1.2
10
pm
1.2
11
pm
1



Tide / Current for Boca Grande Channel, Florida Current
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Boca Grande Channel
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Sun -- 12:29 AM EDT     -1.29 knots Max Ebb
Sun -- 03:25 AM EDT     0.00 knots Slack
Sun -- 05:41 AM EDT     Moonset
Sun -- 06:18 AM EDT     0.96 knots Max Flood
Sun -- 07:00 AM EDT     Sunrise
Sun -- 09:23 AM EDT     -0.00 knots Slack
Sun -- 12:37 PM EDT     -1.28 knots Max Ebb
Sun -- 03:28 PM EDT     0.00 knots Slack
Sun -- 06:07 PM EDT     Moonrise
Sun -- 06:28 PM EDT     1.22 knots Max Flood
Sun -- 07:53 PM EDT     Sunset
Sun -- 09:53 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Boca Grande Channel, Florida Current, knots
12
am
-1.3
1
am
-1.3
2
am
-0.9
3
am
-0.3
4
am
0.4
5
am
0.8
6
am
0.9
7
am
0.9
8
am
0.7
9
am
0.2
10
am
-0.4
11
am
-0.9
12
pm
-1.2
1
pm
-1.3
2
pm
-1
3
pm
-0.4
4
pm
0.4
5
pm
0.9
6
pm
1.2
7
pm
1.2
8
pm
1
9
pm
0.6
10
pm
-0.1
11
pm
-0.7




Weather Map
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GEOS Local Image of gulf of mexico   
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Key West, FL,



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