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Marine Weather and Tide Forecast for Duck Key, FL

April 29, 2025 1:30 AM EDT (05:30 UTC)
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Sunrise 6:51 AM   Sunset 7:57 PM
Moonrise 7:04 AM   Moonset 9:25 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
GMZ043 Expires:202504290845;;635319 Fzus52 Kkey 290231 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1031 pm edt Mon apr 28 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>044-290845- 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- 1031 pm edt Mon apr 28 2025

.small craft should exercise caution - .

Overnight - Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy.

Tuesday - Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy. Isolated showers.

Tuesday night - Northeast to east winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. NEarshore waters choppy. Isolated showers.

Wednesday - East winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. NEarshore waters choppy.

Wednesday night - East winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally to 6 feet west of cosgrove shoal light. NEarshore waters choppy.

Thursday - East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters a moderate chop.

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

Friday - East to southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop, becoming a light to moderate chop. Isolated showers.

Friday night - East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.

Saturday - East to southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop, becoming a smooth to a light chop. Isolated showers.

Saturday night - East winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Isolated showers.
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1031 Pm Edt Mon Apr 28 2025

Synopsis - Moderate easterly breezes will become fresh tonight while high pressure builds over the eastern seaboard. The high will remain in place for most of the week, so breezes will oscillate between moderate to fresh on a weak diurnal trend with stronger breezes in the evening hours. Small craft advisory conditions are possible for the florida straits, though unlikely, for a few days. The pattern will remain dry, with the exception of Tuesday, when a decaying front pushes moisture across the keys.
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 Duck Key, FL
   
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Tide / Current for Conch Key, eastern end, Florida
  
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Conch Key
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Mon -- 03:10 AM EDT     0.17 feet Low Tide
Mon -- 06:50 AM EDT     Sunrise
Mon -- 07:13 AM EDT     Moonrise
Mon -- 09:17 AM EDT     1.91 feet High Tide
Mon -- 04:33 PM EDT     -0.39 feet Low Tide
Mon -- 07:52 PM EDT     Sunset
Mon -- 09:13 PM EDT     Moonset
Mon -- 10:59 PM EDT     1.05 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Conch Key, eastern end, Florida does not exist in database. Press Edit above and select a valid nearby location.

Conch Key, eastern end, Florida, Tide feet
12
am
0.9
1
am
0.6
2
am
0.3
3
am
0.2
4
am
0.3
5
am
0.6
6
am
1
7
am
1.4
8
am
1.7
9
am
1.9
10
am
1.9
11
am
1.7
12
pm
1.3
1
pm
0.8
2
pm
0.3
3
pm
-0.1
4
pm
-0.4
5
pm
-0.4
6
pm
-0.2
7
pm
0.1
8
pm
0.5
9
pm
0.8
10
pm
1
11
pm
1

Tide / Current for Long Key Viaduct, Florida Current
  
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Long Key Viaduct
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Mon -- 01:14 AM EDT     -0.00 knots Slack
Mon -- 04:16 AM EDT     -1.53 knots Max Ebb
Mon -- 06:50 AM EDT     Sunrise
Mon -- 07:13 AM EDT     Moonrise
Mon -- 07:25 AM EDT     0.00 knots Slack
Mon -- 09:51 AM EDT     1.06 knots Max Flood
Mon -- 12:40 PM EDT     -0.00 knots Slack
Mon -- 04:15 PM EDT     -1.88 knots Max Ebb
Mon -- 07:36 PM EDT     0.00 knots Slack
Mon -- 07:52 PM EDT     Sunset
Mon -- 09:13 PM EDT     Moonset
Mon -- 10:32 PM EDT     1.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Long Key Viaduct, Florida Current does not exist in database. Press Edit above and select a valid nearby location.

Long Key Viaduct, Florida Current, knots
12
am
0.9
1
am
0.2
2
am
-0.6
3
am
-1.2
4
am
-1.5
5
am
-1.4
6
am
-1
7
am
-0.3
8
am
0.4
9
am
0.9
10
am
1.1
11
am
0.9
12
pm
0.4
1
pm
-0.2
2
pm
-1
3
pm
-1.6
4
pm
-1.9
5
pm
-1.8
6
pm
-1.3
7
pm
-0.5
8
pm
0.4
9
pm
1.1
10
pm
1.6
11
pm
1.6

Area Discussion for Key West, FL
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FXUS62 KKEY 290253 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 1053 PM EDT Mon Apr 28 2025

New DISCUSSION, MARINE, AVIATION

DISCUSSION
Issued at 929 PM EDT Mon Apr 28 2025

A robust surface high spanning the Atlantic States and the Gulf is steadily shifting southeastward and resulting in strengthening east northeasterly breezes across the Keys and surrounding waters. These breezes are resulting in warm but relatively dry conditions. Temperatures are now in the upper 70s with dew points in the mid to upper 60s. Deep layered ridging dominates with the lower to mid level ridge aligned over Florida and the southeast.
This evenings sounding depicted an unusually low inversion based way down at 975 mb and a very dry boundary layer. However, Miami's sounding indicated an inversion at around 925 mb. Miami's sounding is likely more representative as recent satellite imagery displays a field of stratocumulus with bases in the 2500 range according to local metars. In either case, stable conditions prevail and no precipitation has been detected.

Expect moderate to fresh east northeasterly breezes to persist through the overnight period thanks to the previously mentioned surface ridge continuing to expand southeastward. While deep layered ridging is expected to dominate, satellite imagery and guidance suggests the remnants of a cold front will drive southwestward into our area late in the night. This will drive up lower level moisture. Forecast soundings also suggest that inhibition will lift and weaken substantially, opening the door for shower activity late in the night. This justifies retaining dime pops. Expect overnight lows to be in the mid 70s with dew points remaining in the upper 60s.

MARINE
Issued at 929 PM EDT Mon Apr 28 2025

A strong and broad surface high emerging off the Mid-Atlantic Coast is generating freshening northeast to easterly breezes across Keys waters. A Caution is in effect for all Keys waters.
Have only removed first period wind transitions in the evening marine update.



AVIATION
(00Z TAFS)
Issued at 929 PM EDT Mon Apr 28 2025

VFR conditions will prevail at the island terminals overnight.
Winds will be moderate to fresh 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
LONF1 - Long Key, FL 4 mi31 minE 17 78°F 30.0868°F
PKYF1 - Peterson Key, FL 11 mi91 min 79°F
VCAF1 - 8723970 - Vaca Key, FL 13 mi43 minE 9.9G15 77°F 81°F
LRKF1 - Little Rabbit Key, FL 14 mi91 min 82°F
JKYF1 - Johnson Key, FL 18 mi91 min 79°F
BOBF1 - Bob Allen, FL 19 mi91 min 80°F
WRBF1 - Whipray Basin, FL 21 mi91 min13 82°F
MUKF1 - Murray Key, FL 22 mi91 min 77°F
BKYF1 23 mi91 min 82°F
GBTF1 - Garfield Bight, FL 26 mi91 min 81°F
TBYF1 27 mi91 min 82°F
BNKF1 - Butternut Key, FL 28 mi91 min 80°F
LMDF1 - Little Madeira, FL 30 mi91 min 81°F
WWEF1 31 mi151 min 82°F
TRRF1 - Taylor River, FL 32 mi91 min 84°F
DKKF1 - Duck Key, FL 34 mi91 min 81°F
LRIF1 34 mi91 min 82°F
JBYF1 35 mi91 min 83°F
TCVF1 - Trout Cove, FL 35 mi91 min 81°F
BSKF1 36 mi151 min 74°F
BWSF1 - Blackwater Sound, FL 36 mi91 min 81°F
CWAF1 36 mi151 min 80°F
LBSF1 - Little Blackwater, FL 38 mi91 min 81°F
LSNF1 - Long Sound, FL 38 mi91 min 82°F
NRRF1 38 mi91 min 83°F
MNBF1 39 mi91 min 80°F
THRF1 39 mi91 min 82°F
HCEF1 - Highway Creek, FL 40 mi91 min 81°F
GBIF1 - Gunboat Island, FL 41 mi91 min 81°F
SREF1 41 mi91 min 81°F
MDKF1 43 mi91 min 82°F
TPEF1 - Tarpon Bay East, FL 43 mi91 min 82°F
CANF1 - Cane Patch, FL 44 mi91 min 81°F
HREF1 45 mi91 min 81°F
BDVF1 - Broad River, FL 48 mi91 min 84°F


Wind History for Vaca Key, FL
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KMTH THE FLORIDA KEYS MARATHON INTL,FL 10 sm29 minENE 12G2010 smMostly Cloudy77°F66°F69%30.12

Weather Map
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GEOS Local Image of southeast  
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Key West, FL,





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