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Marine Weather and Tide Forecast for Key West, FL

April 23, 2025 11:19 PM EDT (03:19 UTC)
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Sunrise 6:56 AM   Sunset 7:54 PM
Moonrise 3:05 AM   Moonset 2:44 PM 
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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.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025
GMZ044 Expires:202504240845;;346252 Fzus52 Kkey 240236 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1036 pm edt Wed apr 23 2025
florida bay, hawk channel and straits of florida from ocean reef to south of dry tortugas, and the extreme southeastern gulf of america, 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.
wave detail will include details about the period and direction of origin for the highest energy waves. Long-period swells coming from a different direction than the wind would be included in the wave detail.
gmz042>044-240845- 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- 1036 pm edt Wed apr 23 2025

.small craft should exercise caution - .

Overnight - East winds 15 to 20 knots. Seas 2 to 3 feet. NEarshore waters choppy.

Thursday - East winds 15 to 20 knots. Seas building to 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy. Isolated showers.

Thursday night - East winds near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters rough. Isolated showers and Thunderstorms.

Friday - East winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy. Isolated showers.

Friday night - East winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet. NEarshore waters choppy, becoming a moderate chop. Isolated showers.

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

Saturday night - Northeast to east winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop.

Sunday - Northeast to east winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop.

Sunday night - Northeast to east winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop.

Monday - East winds 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light to moderate chop. Isolated showers.

Monday night - East winds 15 to 20 knots. Seas 2 to 3 feet. NEarshore waters choppy. Isolated showers.
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1036 Pm Edt Wed Apr 23 2025

Synopsis - Breezes are expected to freshen and shift to the northeast to east tonight as high pressure shifts slightly west and subtly strengthens. Breezes modestly slacken one more time for overnight into Thursday morning before another prolonged surge in breezes is anticipated for Thursday afternoon through Friday night. Small craft advisories likely will be required as a result for this time frame. The high weakens over the weekend leading to slackening breezes.
the approximate shoreward edge of the gulf stream as of april 22nd - .
30 nm south of dry tortugas light - .on loggerhead key. 6 nm south of cosgrove shoal light - .off the marquesas keys. 2 nm south of sand key light - .off key west. 4 nm south of looe key - .off big pine key. 5 nm south of sombrero key light - .off marathon. 7 nm southeast of alligator reef light - .off islamorada. 5 nm southeast of molasses reef light - .off key largo. 4 nm east of carysfort reef light - .off ocean reef.
gulf stream information courtesy of the national weather service in key west based on products from nasa sport.

7 Day Forecast for Marine Location Near Key West, FL
   
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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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Wed -- 12:09 AM EDT     0.00 feet Low Tide
Wed -- 04:03 AM EDT     Moonrise
Wed -- 06:40 AM EDT     1.03 feet High Tide
Wed -- 06:58 AM EDT     Sunrise
Wed -- 12:04 PM EDT     0.32 feet Low Tide
Wed -- 03:43 PM EDT     Moonset
Wed -- 06:23 PM EDT     1.37 feet High Tide
Wed -- 07:53 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Sand Key Lighthouse, Sand Key Channel, Florida does not exist in database. Press Edit above and select a valid nearby location.

Sand Key Lighthouse, Sand Key Channel, Florida, Tide feet
12
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0
1
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0.1
2
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0.2
3
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0.5
4
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0.7
5
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0.9
6
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1
7
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1
8
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0.9
9
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0.8
10
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0.6
11
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0.4
12
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0.3
1
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0.4
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0.6
3
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0.8
4
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1.1
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1.2
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1.4
7
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1.3
8
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1.2
9
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0.9
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0.6
11
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0.3

Tide / Current for Boca Grande Channel, Florida Current
  
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Boca Grande Channel
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Wed -- 01:08 AM EDT     0.00 knots Slack
Wed -- 03:55 AM EDT     1.01 knots Max Flood
Wed -- 04:04 AM EDT     Moonrise
Wed -- 06:59 AM EDT     Sunrise
Wed -- 07:26 AM EDT     -0.00 knots Slack
Wed -- 10:38 AM EDT     -1.17 knots Max Ebb
Wed -- 01:31 PM EDT     0.00 knots Slack
Wed -- 03:43 PM EDT     Moonset
Wed -- 04:20 PM EDT     1.10 knots Max Flood
Wed -- 07:45 PM EDT     -0.00 knots Slack
Wed -- 07:54 PM EDT     Sunset
Wed -- 11:03 PM EDT     -1.36 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Boca Grande Channel, Florida Current does not exist in database. Press Edit above and select a valid nearby location.

Boca Grande Channel, Florida Current, knots
12
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-0.7
1
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-0.1
2
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0.5
3
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0.9
4
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1
5
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0.9
6
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0.7
7
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0.2
8
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-0.3
9
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-0.8
10
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-1.1
11
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-1.2
12
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-0.9
1
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-0.4
2
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0.3
3
pm
0.9
4
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1.1
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1.1
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0.8
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0.4
8
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-0.1
9
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-0.8
10
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-1.2
11
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-1.4

Area Discussion for Key West, FL
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FXUS62 KKEY 240236 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1036 PM EDT Wed Apr 23 2025

New DISCUSSION, MARINE, AVIATION

DISCUSSION
Issued at 1008 PM EDT Wed Apr 23 2025

An Atlantic surface ridge reaches west southwestward across the southeastern United States and Florida. This along with the usual evening surge with this synoptic arrangement has resulted in moderate easterly breezes across the Keys this evening. Cautions remain in effect for most Keys waters. Deep layered ridging remains in control with the western flank of a lower to mid level ridge overhead and under the descending branch of a broad upper trough. This evenings sounding indicated the synoptically driven subsidence inversion has lowered further today and is now based around 915 mb. Precipitable water came in well below normal at .8 inches and surface dew points remain in the mid 60s.

Ridging will continue to dominate the local setup through the overnight period. Easterly breezes may pickup slightly but remain generally moderate and gusty. This healthy flow will minimize overnight cooling and overnight lows will range broadly in the mid 70s. Dew points will linger in the mid 60s and rain chances will be nil.

MARINE
Issued at 1008 PM EDT Wed Apr 23 2025

The western flank of an Atlantic surface ridge will extend west southwestward across the southeast and Florida through the overnight period. This will maintain moderate to fresh easterly breezes on Keys waters. Cautions remain in effect for most Keys waters and no changes made in the evening marine update.

AVIATION
(00Z TAFS)
Issued at 1008 PM EDT Wed Apr 23 2025

VFR conditions will prevail at the island terminals overnight.
Surface winds will remain moderate and gusty out of the east.

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


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
42095 13 mi50 min 78°F 79°F4 ft
SANF1 - Sand Key, FL 15 mi20 minE 19G22 77°F 30.0566°F
KYWF1 - 8724580 - Key West, FL 17 mi50 minESE 11G19 77°F 79°F30.09


Wind History for Key West, FL
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KEYW KEY WEST INTL,FL 20 sm26 minE 12G2110 smA Few Clouds75°F66°F74%30.08
KNQX KEY WEST NAS /BOCA CHICA FIELD/,FL 23 sm26 minE 15G2310 smClear79°F66°F65%30.08

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





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