Marine Weather and Tide Forecast for Duck Key, FL
April 29, 2025 1:30 AM EDT (05:30 UTC)
Change Location
Change Location
 | Sunrise 6:51 AM Sunset 7:57 PM Moonrise 7:04 AM Moonset 9:25 PM |
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.
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
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.
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
NEW! Add second zone forecast
| Conch Key Click for Map 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 |
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 |
| Long Key Viaduct Click for Map 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 |
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 |
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.
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.
Wind History for Vaca Key, FL
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KMTH
Terminal Aerodrome Forecast (TAF) for KMTH
Wind History Graph: MTH
(wind in knots)
GEOS Local Image of southeast
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Key West, FL,
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