Marine Weather and Tide Forecast for Marathon, FL
 | Sunrise 6:37 AM Sunset 8:19 PM Moonrise 12:00 AM Moonset 11:21 AM |
GMZ053 Expires:202506171430;;875845 Fzus52 Kkey 170226 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1026 pm edt Mon jun 16 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.
gmz052>055-072>075-171430- straits of florida from ocean reef to craig key out 20 nm- straits of florida from craig key to west end of seven mile bridge out 20 nm- straits of florida from west end of seven mile bridge to south of halfmoon shoal out 20 nm- straits of florida from halfmoon shoal to 20 nm west of dry tortugas out 20 nm- straits of florida from ocean reef to craig key 20 to 60 nm out- straits of florida from craig key to west end of seven mile bridge 20 to 60 nm out- straits of florida from west end of seven mile bridge to south of halfmoon shoal 20 to 60 nm out- straits of florida from halfmoon shoal to 20 nm west of dry tortugas 20 to 60 nm out- 1026 pm edt Mon jun 16 2025
Overnight - East to southeast winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east to southeast 4 feet at 5 seconds. Isolated showers and Thunderstorms.
Tuesday - East to southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east to southeast 3 feet at 5 seconds. Scattered showers and isolated Thunderstorms.
Tuesday night - East to southeast winds near 15 knots. Seas 2 to 4 feet, occasionally 5 feet. Isolated showers and Thunderstorms.
Wednesday - East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Wednesday night - East to southeast winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers and Thunderstorms.
Thursday - East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated showers and Thunderstorms.
Thursday night - East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Isolated showers and Thunderstorms.
Friday - East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated Thunderstorms.
Friday night - East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated Thunderstorms.
Saturday - East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated Thunderstorms.
Saturday night - East winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers and isolated Thunderstorms.
coastal waters forecast for the florida keys national weather service key west fl 1026 pm edt Mon jun 16 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.
gmz052>055-072>075-171430- straits of florida from ocean reef to craig key out 20 nm- straits of florida from craig key to west end of seven mile bridge out 20 nm- straits of florida from west end of seven mile bridge to south of halfmoon shoal out 20 nm- straits of florida from halfmoon shoal to 20 nm west of dry tortugas out 20 nm- straits of florida from ocean reef to craig key 20 to 60 nm out- straits of florida from craig key to west end of seven mile bridge 20 to 60 nm out- straits of florida from west end of seven mile bridge to south of halfmoon shoal 20 to 60 nm out- straits of florida from halfmoon shoal to 20 nm west of dry tortugas 20 to 60 nm out- 1026 pm edt Mon jun 16 2025
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1026 Pm Edt Mon Jun 16 2025
Synopsis - Atlantic ridging will remain across the florida peninsula through Friday. This will support moderate to occasionally fresh east to southeast breezes. Winds will peak in the evening and overnight, while lulling during the day.
the approximate shoreward edge of the gulf stream as of june 13 - .
18 nm southwest of dry tortugas light - .on loggerhead key. 36 nm south of cosgrove shoal light - .off the marquesas keys. 33 nm south of sand key light - .off key west. 39 nm south of looe key - .off big pine key. 25 nm south of sombrero key light - .off marathon. 11 nm southeast of alligator reef light - .off islamorada. 5 nm southeast of molasses reef light - .off key largo. 5 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 june 13 - .
18 nm southwest of dry tortugas light - .on loggerhead key. 36 nm south of cosgrove shoal light - .off the marquesas keys. 33 nm south of sand key light - .off key west. 39 nm south of looe key - .off big pine key. 25 nm south of sombrero key light - .off marathon. 11 nm southeast of alligator reef light - .off islamorada. 5 nm southeast of molasses reef light - .off key largo. 5 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 Marathon, FL
NEW! Add second zone forecast
| Vaca Key-Fat Deer Key bridge Click for Map Tue -- 12:34 AM EDT Moonrise Tue -- 02:14 AM EDT 1.12 feet High Tide Tue -- 06:35 AM EDT Sunrise Tue -- 07:40 AM EDT 0.39 feet Low Tide Tue -- 12:20 PM EDT Moonset Tue -- 01:29 PM EDT 1.47 feet High Tide Tue -- 08:15 PM EDT Sunset Tue -- 08:43 PM EDT 0.06 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Vaca Key-Fat Deer Key bridge, Florida, Tide feet
| 12 am |
| 0.8 |
| 1 am |
| 1 |
| 2 am |
| 1.1 |
| 3 am |
| 1.1 |
| 4 am |
| 0.9 |
| 5 am |
| 0.7 |
| 6 am |
| 0.5 |
| 7 am |
| 0.4 |
| 8 am |
| 0.4 |
| 9 am |
| 0.5 |
| 10 am |
| 0.8 |
| 11 am |
| 1.1 |
| 12 pm |
| 1.3 |
| 1 pm |
| 1.4 |
| 2 pm |
| 1.5 |
| 3 pm |
| 1.3 |
| 4 pm |
| 1.1 |
| 5 pm |
| 0.8 |
| 6 pm |
| 0.5 |
| 7 pm |
| 0.3 |
| 8 pm |
| 0.1 |
| 9 pm |
| 0.1 |
| 10 pm |
| 0.2 |
| 11 pm |
| 0.5 |
| Moser Channel (swingbridge) Click for Map Tue -- 12:34 AM EDT Moonrise Tue -- 01:42 AM EDT 1.38 knots Max Flood Tue -- 05:02 AM EDT -0.00 knots Slack Tue -- 06:35 AM EDT Sunrise Tue -- 08:13 AM EDT -1.63 knots Max Ebb Tue -- 11:38 AM EDT 0.00 knots Slack Tue -- 12:21 PM EDT Moonset Tue -- 02:08 PM EDT 1.16 knots Max Flood Tue -- 05:17 PM EDT -0.00 knots Slack Tue -- 08:15 PM EDT Sunset Tue -- 08:36 PM EDT -1.65 knots Max Ebb Tide / Current data from XTide NOT FOR NAVIGATION |
Moser Channel (swingbridge), Florida Current, knots
| 12 am |
| 0.7 |
| 1 am |
| 1.3 |
| 2 am |
| 1.4 |
| 3 am |
| 1.1 |
| 4 am |
| 0.6 |
| 5 am |
| 0 |
| 6 am |
| -0.7 |
| 7 am |
| -1.3 |
| 8 am |
| -1.6 |
| 9 am |
| -1.5 |
| 10 am |
| -1.1 |
| 11 am |
| -0.5 |
| 12 pm |
| 0.3 |
| 1 pm |
| 0.9 |
| 2 pm |
| 1.2 |
| 3 pm |
| 1 |
| 4 pm |
| 0.7 |
| 5 pm |
| 0.2 |
| 6 pm |
| -0.5 |
| 7 pm |
| -1.1 |
| 8 pm |
| -1.6 |
| 9 pm |
| -1.6 |
| 10 pm |
| -1.3 |
| 11 pm |
| -0.8 |
FXUS62 KKEY 170250 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 1050 PM EDT Mon Jun 16 2025
New UPDATE, MARINE, AVIATION
UPDATE
Issued at 1050 PM EDT Mon Jun 16 2025
For a while this afternoon and early evening, it looked like things were going to be somewhat busy weather wise. However, as we got closer to sunset, the showers we were seeing on radar quickly dissipated. What showers remain on radar are outside of our area of responsibility this hour. Meanwhile, an east to southeast wind is once again keeping temperatures in the lower 80s with dew points in the mid 70s. A most muggy combination for this evening.
Dry air was still quite evident in this evening's sounding. This will continue to wreck havoc on our rain chances through the next 12 to 24 hours. There is a nocturnal surge beginning to develop across our area and may lend to some boundary collisions but nothing to hang our hats on. Therefore, see no need to deviate from the slight chance PoPs (20%) currently in place.
MARINE
Issued at 1050 PM EDT Mon Jun 16 2025
Atlantic ridging will remain across the Florida Peninsula through Friday. This will support moderate to occasionally fresh east to southeast breezes. Winds will peak in the evening and overnight, while lulling during the day.
AVIATION
(00Z TAFS)
Issued at 1050 PM EDT Mon Jun 16 2025
VFR conditions expected at both island terminals through the overnight and into tomorrow morning. Shower coverage will continue to remain very limited and would mainly trek across the MTH terminal if they develop overnight. Otherwise, ESE winds of 10 to 15 knots with occasional gusts to near 20 knots can be expected.
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...None.
Area Forecast Discussion National Weather Service Key West FL 1050 PM EDT Mon Jun 16 2025
New UPDATE, MARINE, AVIATION
UPDATE
Issued at 1050 PM EDT Mon Jun 16 2025
For a while this afternoon and early evening, it looked like things were going to be somewhat busy weather wise. However, as we got closer to sunset, the showers we were seeing on radar quickly dissipated. What showers remain on radar are outside of our area of responsibility this hour. Meanwhile, an east to southeast wind is once again keeping temperatures in the lower 80s with dew points in the mid 70s. A most muggy combination for this evening.
Dry air was still quite evident in this evening's sounding. This will continue to wreck havoc on our rain chances through the next 12 to 24 hours. There is a nocturnal surge beginning to develop across our area and may lend to some boundary collisions but nothing to hang our hats on. Therefore, see no need to deviate from the slight chance PoPs (20%) currently in place.
MARINE
Issued at 1050 PM EDT Mon Jun 16 2025
Atlantic ridging will remain across the Florida Peninsula through Friday. This will support moderate to occasionally fresh east to southeast breezes. Winds will peak in the evening and overnight, while lulling during the day.
AVIATION
(00Z TAFS)
Issued at 1050 PM EDT Mon Jun 16 2025
VFR conditions expected at both island terminals through the overnight and into tomorrow morning. Shower coverage will continue to remain very limited and would mainly trek across the MTH terminal if they develop overnight. Otherwise, ESE winds of 10 to 15 knots with occasional gusts to near 20 knots can be expected.
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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