Marine Weather and Tide Forecast for Key Colony Beach, FL
April 20, 2025 10:52 PM EDT (02:52 UTC) Change Location
 | Sunrise 6:59 AM Sunset 7:52 PM Moonrise 12:56 AM Moonset 11:35 AM |
GMZ053 Expires:202504210830;;177495 Fzus52 Kkey 210229 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1029 pm edt Sun apr 20 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>075-210830- 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- 1029 pm edt Sun apr 20 2025
.small craft advisory in effect - .
Overnight - East winds 20 to 25 knots, decreasing to near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 7 seconds.
Monday - East winds near 20 knots, decreasing to 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 6 feet at 7 seconds.
Monday night - East winds 15 to 20 knots. Seas subsiding to 4 to 6 feet, occasionally to 8 feet. Wave detail: east 5 feet at 6 seconds.
Tuesday - East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet.
Tuesday night - East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet.
Wednesday - East winds near 15 to 20 knots, decreasing to near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet.
Wednesday night - East winds increasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet.
Thursday - East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Isolated showers.
Thursday night - East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Scattered showers.
Friday and Friday night - East winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Isolated showers.
coastal waters forecast for the florida keys national weather service key west fl 1029 pm edt Sun apr 20 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>075-210830- 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- 1029 pm edt Sun apr 20 2025
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1029 Pm Edt Sun Apr 20 2025
Synopsis - Fresh to occasionally strong easterlies will continue overnight, but will modestly slacken tomorrow as high pressure over the region begins to slowly weaken. Isolated to scattered showers have been incorporated into the forecast for the second half of the week as a low level moisture surge is starting to look possible.
the approximate shoreward edge of the gulf stream as of april 16 - .
30 nm south of dry tortugas light - .on loggerhead key. 8 nm south of cosgrove shoal light - .off the marquesas keys. 5 nm south of sand key light - .off key west. 9 nm south of looe key - .off big pine key. 13 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 nasa sport.
the approximate shoreward edge of the gulf stream as of april 16 - .
30 nm south of dry tortugas light - .on loggerhead key. 8 nm south of cosgrove shoal light - .off the marquesas keys. 5 nm south of sand key light - .off key west. 9 nm south of looe key - .off big pine key. 13 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 nasa sport.
7 Day Forecast for Marine Location Near Key Colony Beach, FL
NEW! Add second zone forecast
| Boot Key Harbor Click for Map Sun -- 01:56 AM EDT Moonrise Sun -- 03:29 AM EDT 0.85 feet High Tide Sun -- 06:21 AM EDT 0.77 feet Low Tide Sun -- 06:57 AM EDT Sunrise Sun -- 12:34 PM EDT Moonset Sun -- 02:16 PM EDT 1.79 feet High Tide Sun -- 07:49 PM EDT Sunset Sun -- 09:37 PM EDT Last Quarter Sun -- 10:29 PM EDT 0.05 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Boot Key Harbor, Vaca Key, Florida, Tide feet
| 12 am |
| 0.4 |
| 1 am |
| 0.6 |
| 2 am |
| 0.8 |
| 3 am |
| 0.8 |
| 4 am |
| 0.8 |
| 5 am |
| 0.8 |
| 6 am |
| 0.8 |
| 7 am |
| 0.8 |
| 8 am |
| 0.8 |
| 9 am |
| 0.9 |
| 10 am |
| 1.1 |
| 11 am |
| 1.3 |
| 12 pm |
| 1.5 |
| 1 pm |
| 1.7 |
| 2 pm |
| 1.8 |
| 3 pm |
| 1.8 |
| 4 pm |
| 1.6 |
| 5 pm |
| 1.3 |
| 6 pm |
| 1 |
| 7 pm |
| 0.7 |
| 8 pm |
| 0.4 |
| 9 pm |
| 0.2 |
| 10 pm |
| 0.1 |
| 11 pm |
| 0.1 |
| Moser Channel (swingbridge) Click for Map Sun -- 01:56 AM EDT Moonrise Sun -- 02:35 AM EDT 1.06 knots Max Flood Sun -- 06:26 AM EDT -0.00 knots Slack Sun -- 06:57 AM EDT Sunrise Sun -- 09:18 AM EDT -0.97 knots Max Ebb Sun -- 12:34 PM EDT Moonset Sun -- 12:47 PM EDT 0.00 knots Slack Sun -- 02:46 PM EDT 0.53 knots Max Flood Sun -- 05:19 PM EDT -0.00 knots Slack Sun -- 07:49 PM EDT Sunset Sun -- 09:26 PM EDT -1.45 knots Max Ebb Sun -- 09:37 PM EDT Last Quarter Tide / Current data from XTide NOT FOR NAVIGATION |
Moser Channel (swingbridge), Florida Current, knots
| 12 am |
| 0 |
| 1 am |
| 0.6 |
| 2 am |
| 1 |
| 3 am |
| 1 |
| 4 am |
| 0.9 |
| 5 am |
| 0.6 |
| 6 am |
| 0.2 |
| 7 am |
| -0.3 |
| 8 am |
| -0.7 |
| 9 am |
| -1 |
| 10 am |
| -0.9 |
| 11 am |
| -0.7 |
| 12 pm |
| -0.3 |
| 1 pm |
| 0.1 |
| 2 pm |
| 0.4 |
| 3 pm |
| 0.5 |
| 4 pm |
| 0.4 |
| 5 pm |
| 0.1 |
| 6 pm |
| -0.2 |
| 7 pm |
| -0.7 |
| 8 pm |
| -1.1 |
| 9 pm |
| -1.4 |
| 10 pm |
| -1.4 |
| 11 pm |
| -1.1 |
FXUS62 KKEY 201901 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 301 PM EDT Sun Apr 20 2025
New DISCUSSION, MARINE, AVIATION
DISCUSSION
Issued at 226 PM EDT Sun Apr 20 2025 We had to look up the word "beautiful" in the thesaurus, because we are running out of words that grasp how wonderful the weather is. The KBYX radar has been void of any shower activity over the past few hours, but we can see some sea spray as a result of the prolonged windy conditions. On visible satellite, we can see some low-level cumulus clouds that may skirt across our skies this evening, but out to our west is a narrow cloud shield associated with the digging trough over the western and central U.S. Some of these high clouds may be visible on the horizon over the next couple of days as the trough lifts to our north, but weather conditions here will remain dry.
The center of the high pressure will remain off of the coast of the Southeast, and will seem to wobble over the next few days as the aforementioned trough progresses. Since the strength of the high will weaken to some degree, the recent windy conditions will taper while the center of the high repositions itself. Sensible weather really remain virtually the same each day through the middle of the week.
Guidance continues to hint at the possibility of some shower activity closer to the end of the week as the high weakens further. The finer details such as coverage or rainfall amounts are still unclear as these will likely change with each new model run. We will go ahead and continue to enjoy our Florida sunshine while it lasts!
MARINE
Issued at 226 PM EDT Sun Apr 20 2025 A Small Craft Advisory remains in effect across all Florida Keys local waters. From synopsis, strong easterlies will continue into tonight, but will modestly slacken as high pressure over the region begins to slowly weaken. However, marine hazard headlines will likely continue due to occasional fresh breezes. Isolated to scattered showers have been incorporated into the forecast for the second half of the week as a low level moisture surge is starting to look possible.
AVIATION
(18Z TAFS)
Issued at 226 PM EDT Sun Apr 20 2025 VFR conditions will prevail at both EYW and MTH through the TAF period. Dry air will limit any shower activity therefore no mention of VCSH in either location. Near surface winds will continue easterly at 15 to 20 knots with frequent gusts of near 25 knots through this evening and gradually slacken to near 15 knots later tonight.
PRELIMINARY POINT TEMPS/POPS
Key West 75 82 74 83 / 0 0 0 0 Marathon 75 82 74 82 / 0 0 0 0
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...Small Craft Advisory until 11 PM EDT this evening for GMZ031>035- 042>044-052>055-072>075.
Area Forecast Discussion National Weather Service Key West FL 301 PM EDT Sun Apr 20 2025
New DISCUSSION, MARINE, AVIATION
DISCUSSION
Issued at 226 PM EDT Sun Apr 20 2025 We had to look up the word "beautiful" in the thesaurus, because we are running out of words that grasp how wonderful the weather is. The KBYX radar has been void of any shower activity over the past few hours, but we can see some sea spray as a result of the prolonged windy conditions. On visible satellite, we can see some low-level cumulus clouds that may skirt across our skies this evening, but out to our west is a narrow cloud shield associated with the digging trough over the western and central U.S. Some of these high clouds may be visible on the horizon over the next couple of days as the trough lifts to our north, but weather conditions here will remain dry.
The center of the high pressure will remain off of the coast of the Southeast, and will seem to wobble over the next few days as the aforementioned trough progresses. Since the strength of the high will weaken to some degree, the recent windy conditions will taper while the center of the high repositions itself. Sensible weather really remain virtually the same each day through the middle of the week.
Guidance continues to hint at the possibility of some shower activity closer to the end of the week as the high weakens further. The finer details such as coverage or rainfall amounts are still unclear as these will likely change with each new model run. We will go ahead and continue to enjoy our Florida sunshine while it lasts!
MARINE
Issued at 226 PM EDT Sun Apr 20 2025 A Small Craft Advisory remains in effect across all Florida Keys local waters. From synopsis, strong easterlies will continue into tonight, but will modestly slacken as high pressure over the region begins to slowly weaken. However, marine hazard headlines will likely continue due to occasional fresh breezes. Isolated to scattered showers have been incorporated into the forecast for the second half of the week as a low level moisture surge is starting to look possible.
AVIATION
(18Z TAFS)
Issued at 226 PM EDT Sun Apr 20 2025 VFR conditions will prevail at both EYW and MTH through the TAF period. Dry air will limit any shower activity therefore no mention of VCSH in either location. Near surface winds will continue easterly at 15 to 20 knots with frequent gusts of near 25 knots through this evening and gradually slacken to near 15 knots later tonight.
PRELIMINARY POINT TEMPS/POPS
Key West 75 82 74 83 / 0 0 0 0 Marathon 75 82 74 82 / 0 0 0 0
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...Small Craft Advisory until 11 PM EDT this evening for GMZ031>035- 042>044-052>055-072>075.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| VCAF1 - 8723970 - Vaca Key, FL | 1 mi | 53 min | E 8.9G | 78°F | 79°F | |||
| LONF1 - Long Key, FL | 16 mi | 43 min | E 19 | 78°F | 30.10 | 69°F | ||
| KYWF1 - 8724580 - Key West, FL | 39 mi | 53 min | E 9.9G | 78°F | 78°F | 30.14 | ||
| SANF1 - Sand Key, FL | 44 mi | 43 min | E 20G | 78°F | 30.10 | 67°F |
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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