Marine Weather and Tide Forecast for Marathon, FL
December 7, 2024 11:18 PM EST (04:18 UTC) Change Location
 | Sunrise 6:57 AM Sunset 5:40 PM Moonrise 12:08 PM Moonset 11:49 PM |
GMZ043 Expires:202412080945;;363114 Fzus52 Kkey 080338 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1038 pm est Sat dec 7 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.
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>044-080945- 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- 1038 pm est Sat dec 7 2024
.small craft should exercise caution - .
Overnight - Northeast winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy.
Sunday - Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 3 to 5 feet, occasionally to 6 feet west of cosgrove shoal light. NEarshore waters choppy.
Sunday night - East winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy, becoming a moderate chop.
Monday - East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters a moderate chop.
Monday night - East winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Tuesday - East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Isolated showers.
Tuesday night - East to southeast winds 10 to 15 knots, becoming southeast and increasing to near 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop, becoming a moderate chop. Isolated showers.
Wednesday - Southeast to south winds 10 to 15 knots, becoming southwest to west in the afternoon. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. Scattered showers.
Wednesday night - Northwest to north winds 15 to 20 knots, becoming north and increasing to 20 to 25 knots. Seas 2 to 3 feet. West of cosgrove shoal light, seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet. NEarshore waters choppy, becoming very rough. Isolated showers.
Thursday - North to northeast winds 20 to 25 knots, decreasing to near 20 knots. Seas 2 to 4 feet, occasionally to 5 feet, except 6 to 8 feet, occasionally to 10 feet west of cosgrove shoal light. NEarshore waters very rough, becoming rough. Isolated showers.
Thursday night - Northeast winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 6 feet, occasionally to 8 feet west of cosgrove shoal light. NEarshore waters choppy. Isolated showers.
coastal waters forecast for the florida keys national weather service key west fl 1038 pm est Sat dec 7 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.
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>044-080945- 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- 1038 pm est Sat dec 7 2024
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1038 Pm Est Sat Dec 7 2024
Synopsis - High pressure across the southeast united states will move slowly eastward tonight. As the high moves further into the western north atlantic early next week, breezes will clock around to the east to southeast Tuesday and Tuesday night. A stronger cold front will approach the keys marine zones late Wednesday or Wednesday night with a period of fresh to potentially strong mainly north breezes.
the approximate shoreward edge of the gulf stream as of december 5 - .
35 nm south of dry tortugas light - .on loggerhead key. 19 nm south of cosgrove shoal light - .off the marquesas keys. 9 nm south of sand key light - .off key west. 10 nm south of looe key - .off big pine key. 14 nm south of sombrero key light - .off marathon. 15 nm southeast of alligator reef light - .off islamorada. 14 nm southeast of molasses reef light - .off key largo. 12 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 the real time ocean forecast system.
the approximate shoreward edge of the gulf stream as of december 5 - .
35 nm south of dry tortugas light - .on loggerhead key. 19 nm south of cosgrove shoal light - .off the marquesas keys. 9 nm south of sand key light - .off key west. 10 nm south of looe key - .off big pine key. 14 nm south of sombrero key light - .off marathon. 15 nm southeast of alligator reef light - .off islamorada. 14 nm southeast of molasses reef light - .off key largo. 12 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 the real time ocean forecast system.
NEW! Add second zone forecast
| Vaca Key-Fat Deer Key bridge Click for Map Sat -- 06:56 AM EST Sunrise Sat -- 07:34 AM EST 0.13 feet Low Tide Sat -- 12:07 PM EST Moonrise Sat -- 01:48 PM EST 1.20 feet High Tide Sat -- 05:35 PM EST Sunset Sat -- 07:11 PM EST 0.50 feet Low Tide Sat -- 11:48 PM EST Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
Vaca Key-Fat Deer Key bridge, Florida, Tide feet
| 12 am |
| 1.8 |
| 1 am |
| 1.7 |
| 2 am |
| 1.5 |
| 3 am |
| 1.3 |
| 4 am |
| 0.9 |
| 5 am |
| 0.6 |
| 6 am |
| 0.3 |
| 7 am |
| 0.1 |
| 8 am |
| 0.1 |
| 9 am |
| 0.3 |
| 10 am |
| 0.5 |
| 11 am |
| 0.8 |
| 12 pm |
| 1 |
| 1 pm |
| 1.2 |
| 2 pm |
| 1.2 |
| 3 pm |
| 1.1 |
| 4 pm |
| 1 |
| 5 pm |
| 0.8 |
| 6 pm |
| 0.6 |
| 7 pm |
| 0.5 |
| 8 pm |
| 0.6 |
| 9 pm |
| 0.8 |
| 10 pm |
| 1 |
| 11 pm |
| 1.3 |
| Moser Channel (swingbridge) Click for Map Sat -- 12:35 AM EST 0.98 knots Max Flood Sat -- 03:31 AM EST -0.00 knots Slack Sat -- 06:56 AM EST Sunrise Sat -- 07:05 AM EST -1.71 knots Max Ebb Sat -- 10:36 AM EST 0.00 knots Slack Sat -- 12:08 PM EST Moonrise Sat -- 01:16 PM EST 1.28 knots Max Flood Sat -- 04:42 PM EST -0.00 knots Slack Sat -- 05:36 PM EST Sunset Sat -- 07:51 PM EST -1.53 knots Max Ebb Sat -- 11:18 PM EST 0.00 knots Slack Sat -- 11:49 PM EST Moonset Tide / Current data from XTide NOT FOR NAVIGATION |
Moser Channel (swingbridge), Florida Current, knots
| 12 am |
| 0.9 |
| 1 am |
| 0.9 |
| 2 am |
| 0.7 |
| 3 am |
| 0.3 |
| 4 am |
| -0.3 |
| 5 am |
| -0.9 |
| 6 am |
| -1.5 |
| 7 am |
| -1.7 |
| 8 am |
| -1.6 |
| 9 am |
| -1.1 |
| 10 am |
| -0.5 |
| 11 am |
| 0.3 |
| 12 pm |
| 1 |
| 1 pm |
| 1.3 |
| 2 pm |
| 1.2 |
| 3 pm |
| 0.9 |
| 4 pm |
| 0.4 |
| 5 pm |
| -0.2 |
| 6 pm |
| -0.9 |
| 7 pm |
| -1.4 |
| 8 pm |
| -1.5 |
| 9 pm |
| -1.3 |
| 10 pm |
| -0.9 |
| 11 pm |
| -0.2 |
FXUS62 KKEY 080345 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 1045 PM EST Sat Dec 7 2024
New DISCUSSION, MARINE, AVIATION
DISCUSSION
Issued at 1010 PM EST Sat Dec 7 2024 Water vapor imagery highlights a meandering upper-level low in the Southwest US, upstream from an amplifying and progressive mean layer ridge. The coastal convergence zone which was setup east of South Florida this morning and afternoon, finally broke free and is now nearing the Cuban coast near Havana. These light to moderate rain showers worked west-southwest through the Straits of Florida over the past several hours.
A surface high centered near the FL/GA border supports moderate to fresh northeast breezes across the Keys this evening. Given the cooler SSTs north of the island chain and stronger gradient over the Straits, we assume values across the Gulf and Bayside range from 10 to 15 knots, while the Reef registers 13 to 19 knots at this hour. Temperatures range from the upper 60s to near 70 and dewpoints are in the lower 60s. The Florida Keys are in for another cool, dry, and rain- free night. Overnight lows will fall into the mid 60s.
Changes are on the way, with winds turning to the east Sunday night and Monday. The next cold front will be on our doorstep Wednesday afternoon.
MARINE
Issued at 1010 PM EST Sat Dec 7 2024 High pressure across the Southeast United States will move slowly eastward tonight. As the high moves further into the western North Atlantic early next week, breezes will clock around to the east to southeast Tuesday and Tuesday night. A stronger cold front will approach the Keys marine zones late Wednesday or Wednesday night with a period of fresh to potentially strong mainly north breezes.
AVIATION
(00Z TAFS)
Issued at 1010 PM EST Sat Dec 7 2024 VFR and gentle/moderate northeast breezes will prevail at the EYW and MTH terminals overnight.
PRELIMINARY POINT TEMPS/POPS
Key West 68 78 71 80 / 10 0 0 0 Marathon 67 76 70 78 / 10 0 0 0
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...None.
Area Forecast Discussion National Weather Service Key West FL 1045 PM EST Sat Dec 7 2024
New DISCUSSION, MARINE, AVIATION
DISCUSSION
Issued at 1010 PM EST Sat Dec 7 2024 Water vapor imagery highlights a meandering upper-level low in the Southwest US, upstream from an amplifying and progressive mean layer ridge. The coastal convergence zone which was setup east of South Florida this morning and afternoon, finally broke free and is now nearing the Cuban coast near Havana. These light to moderate rain showers worked west-southwest through the Straits of Florida over the past several hours.
A surface high centered near the FL/GA border supports moderate to fresh northeast breezes across the Keys this evening. Given the cooler SSTs north of the island chain and stronger gradient over the Straits, we assume values across the Gulf and Bayside range from 10 to 15 knots, while the Reef registers 13 to 19 knots at this hour. Temperatures range from the upper 60s to near 70 and dewpoints are in the lower 60s. The Florida Keys are in for another cool, dry, and rain- free night. Overnight lows will fall into the mid 60s.
Changes are on the way, with winds turning to the east Sunday night and Monday. The next cold front will be on our doorstep Wednesday afternoon.
MARINE
Issued at 1010 PM EST Sat Dec 7 2024 High pressure across the Southeast United States will move slowly eastward tonight. As the high moves further into the western North Atlantic early next week, breezes will clock around to the east to southeast Tuesday and Tuesday night. A stronger cold front will approach the Keys marine zones late Wednesday or Wednesday night with a period of fresh to potentially strong mainly north breezes.
AVIATION
(00Z TAFS)
Issued at 1010 PM EST Sat Dec 7 2024 VFR and gentle/moderate northeast breezes will prevail at the EYW and MTH terminals overnight.
PRELIMINARY POINT TEMPS/POPS
Key West 68 78 71 80 / 10 0 0 0 Marathon 67 76 70 78 / 10 0 0 0
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| VCAF1 - 8723970 - Vaca Key, FL | 4 mi | 49 min | NE 13G | 69°F | 69°F | |||
| KYWF1 - 8724580 - Key West, FL | 43 mi | 49 min | ENE 8.9G | 70°F | 72°F | 30.22 |
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 gulf of mexico
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Key West, FL,
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