Marine Weather and Tide Forecast for Key Colony Beach, FL
 | Sunrise 7:07 AM Sunset 7:48 PM Moonrise 2:55 AM Moonset 2:12 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
GMZ053 Expires:202604130830;;261843 Fzus52 Kkey 122029 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 429 pm edt Sun apr 12 2026
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>075-130830- 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- 429 pm edt Sun apr 12 2026
.small craft advisory in effect - .
Tonight - Northeast to east winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave detail: northeast to east 8 feet at 7 seconds. A slight chance of showers.
Monday - Northeast to east winds near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to 5 to 7 feet, occasionally to 9 feet. Wave detail: northeast to east 7 feet at 7 seconds. A slight chance of showers.
Monday night - Northeast to east winds 20 to 25 knots, decreasing to near 20 knots. Seas 6 to 8 feet, occasionally to 10 feet, subsiding to 5 to 7 feet, occasionally to 9 feet. Wave detail: northeast to east 8 feet at 7 seconds. A slight chance of showers.
Tuesday - Northeast to east winds near 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. A slight chance of showers.
Tuesday night - Northeast to east winds near 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. A slight chance of showers.
Wednesday - Northeast to east winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. A slight chance of showers.
Wednesday night - East winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet.
Thursday - Northeast to east winds near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet.
Thursday night - Northeast to east winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet.
Friday - Northeast to east winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet.
Friday night - East winds near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet.
coastal waters forecast for the florida keys national weather service key west fl 429 pm edt Sun apr 12 2026
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>075-130830- 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- 429 pm edt Sun apr 12 2026
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 429 Pm Edt Sun Apr 12 2026
Synopsis - A high pressure system off the eastern seaboard will maintain fresh to strong northeast to east breezes through the early portion of this week. Fast-moving light showers cannot be ruled out, especially in the overnight periods. Breezes may briefly lull during the late afternoon and early evening across the southeastern gulf as this area is in the "shadow of florida". As the high moves farther eastward and slowly weakens, easterly breezes will modestly slacken by Thursday.
the approximate shoreward edge of the gulf stream as of april 10 - .
16 nm south of dry tortugas light - .on loggerhead key. 21 nm south of cosgrove shoal light - .off the marquesas keys. 23 nm south of sand key light - .off key west. 37 nm south of looe key - .off big pine key. 29 nm southeast of sombrero key light - .off marathon. 18 nm southeast of alligator reef light - .off islamorada. 13 nm southeast of molasses reef light - .off key largo. 9 nm southeast 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 and rtofs.
the approximate shoreward edge of the gulf stream as of april 10 - .
16 nm south of dry tortugas light - .on loggerhead key. 21 nm south of cosgrove shoal light - .off the marquesas keys. 23 nm south of sand key light - .off key west. 37 nm south of looe key - .off big pine key. 29 nm southeast of sombrero key light - .off marathon. 18 nm southeast of alligator reef light - .off islamorada. 13 nm southeast of molasses reef light - .off key largo. 9 nm southeast 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 and rtofs.
7 Day Forecast for Marine Location Near Key Colony Beach, FL
NEW! Add second zone forecast
| Boot Key Harbor bridge Click for Map Sun -- 12:13 AM EDT 0.12 feet Low Tide Sun -- 03:54 AM EDT Moonrise Sun -- 06:36 AM EDT 1.13 feet High Tide Sun -- 07:05 AM EDT Sunrise Sun -- 11:53 AM EDT 0.45 feet Low Tide Sun -- 03:12 PM EDT Moonset Sun -- 05:52 PM EDT 1.61 feet High Tide Sun -- 07:45 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
Boot Key Harbor bridge, Boot Key, Florida, Tide feet
| 12 am |
| 0.1 |
| 1 am |
| 0.2 |
| 2 am |
| 0.3 |
| 3 am |
| 0.6 |
| 4 am |
| 0.8 |
| 5 am |
| 1 |
| 6 am |
| 1.1 |
| 7 am |
| 1.1 |
| 8 am |
| 1 |
| 9 am |
| 0.8 |
| 10 am |
| 0.6 |
| 11 am |
| 0.5 |
| 12 pm |
| 0.4 |
| 1 pm |
| 0.5 |
| 2 pm |
| 0.8 |
| 3 pm |
| 1 |
| 4 pm |
| 1.3 |
| 5 pm |
| 1.5 |
| 6 pm |
| 1.6 |
| 7 pm |
| 1.5 |
| 8 pm |
| 1.3 |
| 9 pm |
| 1 |
| 10 pm |
| 0.7 |
| 11 pm |
| 0.4 |
| Moser Channel Click for Map Flood direction 346 true Ebb direction 164 true Sun -- 03:09 AM EDT 0.00 knots Slack Sun -- 03:55 AM EDT Moonrise Sun -- 06:51 AM EDT 0.96 knots Max Flood Sun -- 07:05 AM EDT Sunrise Sun -- 09:33 AM EDT -0.00 knots Slack Sun -- 01:01 PM EDT -1.04 knots Max Ebb Sun -- 03:12 PM EDT Moonset Sun -- 03:39 PM EDT 0.00 knots Slack Sun -- 06:10 PM EDT 0.69 knots Max Flood Sun -- 07:45 PM EDT Sunset Sun -- 08:51 PM EDT -0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
Moser Channel, between Molasses and Pigeon Keys (depth 3 ft), Florida Current, knots
| 12 am |
| -1.2 |
| 1 am |
| -1.1 |
| 2 am |
| -0.7 |
| 3 am |
| -0.1 |
| 4 am |
| 0.4 |
| 5 am |
| 0.7 |
| 6 am |
| 0.9 |
| 7 am |
| 1 |
| 8 am |
| 0.8 |
| 9 am |
| 0.3 |
| 10 am |
| -0.2 |
| 11 am |
| -0.7 |
| 12 pm |
| -0.9 |
| 1 pm |
| -1 |
| 2 pm |
| -0.9 |
| 3 pm |
| -0.4 |
| 4 pm |
| 0.2 |
| 5 pm |
| 0.6 |
| 6 pm |
| 0.7 |
| 7 pm |
| 0.6 |
| 8 pm |
| 0.4 |
| 9 pm |
| -0.1 |
| 10 pm |
| -0.6 |
| 11 pm |
| -1.1 |
FXUS62 KKEY 130224 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 1024 PM EDT Sun Apr 12 2026
New DISCUSSION, MARINE, AVIATION
KEY MESSAGES
- A Small Craft Advisory remains in effect for all Florida Keys coastal waters. Breezy to windy conditions will persist for several more days.
- Little to no measurable rain will maintain continued moderate drought conditions in the Florida Keys for the next week.
- Temperatures will remain near normal, with highs in the lower 80s, and lows in the lower 70s.
DISCUSSION
Issued at 957 PM EDT Sun Apr 12 2026 All three GOES water vapor channels reveal a remarkable swath of subsidence across the Southeastern Gulf, the Straits of Florida, and portions of Central Cuba and the Bahama Banks. CIMSS mean layer analyses tell the same story, with deep ridging rooted in a sharp upper level ridge axis reaching northeast from the Yucatan Peninsula. The 00Z KKEY RAOB sampled a dry and stable profile capped by a potent inversion near 850 mb. Despite the hostile thermodynamic environment, widely scattered showers continue to race west through the Straits of Florida this evening. The enhanced echo top algorithm from the KBYX radar suggests heights in the 8-10 kft range, right where the KKEY RAOB sampled an isothermal layer and a limit to buoyancy. The lower level products from CIRA's ALPW indicate this meager moisture surge in the Straits may be followed up by a second surge early tomorrow morning. Nevertheless, slight chances (10%) for the island chain appear appropriate. The main story will be the 20 to 25 knot easterlies overnight. Accompanying the swaying palm trees and rattling shutters will be overnight lows in the lower 70s. No changes are needed or planned.
MARINE
Issued at 957 PM EDT Sun Apr 12 2026 A high pressure system off the Eastern Seaboard will maintain fresh to strong northeast to east breezes through the early portion of this week. Fast-moving light showers cannot be ruled out, especially in the overnight periods. Breezes may briefly lull during the late afternoon and early evening across the southeastern Gulf as this area is in the "shadow of Florida". As the high moves farther eastward and slowly weakens, easterly breezes will modestly slacken by Thursday.
AVIATION
(00Z TAFS)
Issued at 957 PM EDT Sun Apr 12 2026 VFR and gusty easterly breezes will prevail at the EYW and MTH terminals overnight.
PRELIMINARY POINT TEMPS/POPS
Key West 72 82 73 83 / 10 10 10 10 Marathon 73 81 73 81 / 10 10 10 10
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...Small Craft Advisory until 5 PM EDT Monday for GMZ031>035- 042>044-052>055-072>075.
Area Forecast Discussion National Weather Service Key West FL 1024 PM EDT Sun Apr 12 2026
New DISCUSSION, MARINE, AVIATION
KEY MESSAGES
- A Small Craft Advisory remains in effect for all Florida Keys coastal waters. Breezy to windy conditions will persist for several more days.
- Little to no measurable rain will maintain continued moderate drought conditions in the Florida Keys for the next week.
- Temperatures will remain near normal, with highs in the lower 80s, and lows in the lower 70s.
DISCUSSION
Issued at 957 PM EDT Sun Apr 12 2026 All three GOES water vapor channels reveal a remarkable swath of subsidence across the Southeastern Gulf, the Straits of Florida, and portions of Central Cuba and the Bahama Banks. CIMSS mean layer analyses tell the same story, with deep ridging rooted in a sharp upper level ridge axis reaching northeast from the Yucatan Peninsula. The 00Z KKEY RAOB sampled a dry and stable profile capped by a potent inversion near 850 mb. Despite the hostile thermodynamic environment, widely scattered showers continue to race west through the Straits of Florida this evening. The enhanced echo top algorithm from the KBYX radar suggests heights in the 8-10 kft range, right where the KKEY RAOB sampled an isothermal layer and a limit to buoyancy. The lower level products from CIRA's ALPW indicate this meager moisture surge in the Straits may be followed up by a second surge early tomorrow morning. Nevertheless, slight chances (10%) for the island chain appear appropriate. The main story will be the 20 to 25 knot easterlies overnight. Accompanying the swaying palm trees and rattling shutters will be overnight lows in the lower 70s. No changes are needed or planned.
MARINE
Issued at 957 PM EDT Sun Apr 12 2026 A high pressure system off the Eastern Seaboard will maintain fresh to strong northeast to east breezes through the early portion of this week. Fast-moving light showers cannot be ruled out, especially in the overnight periods. Breezes may briefly lull during the late afternoon and early evening across the southeastern Gulf as this area is in the "shadow of Florida". As the high moves farther eastward and slowly weakens, easterly breezes will modestly slacken by Thursday.
AVIATION
(00Z TAFS)
Issued at 957 PM EDT Sun Apr 12 2026 VFR and gusty easterly breezes will prevail at the EYW and MTH terminals overnight.
PRELIMINARY POINT TEMPS/POPS
Key West 72 82 73 83 / 10 10 10 10 Marathon 73 81 73 81 / 10 10 10 10
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...Small Craft Advisory until 5 PM EDT Monday 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 | 48 min | ENE 15G | 77°F | 30.18 | |||
| SMKF1 - Sombrero Key, FL | 5 mi | 26 min | ENE 21G | 76°F | 30.19 | 71°F | ||
| LONF1 - Long Key, FL | 16 mi | 36 min | ENE 23G | 76°F | 30.17 | 67°F | ||
| KYWF1 - 8724580 - Key West, FL | 39 mi | 48 min | E 7G | 30.21 | ||||
| SANF1 - Sand Key, FL | 44 mi | 36 min | ENE 22G | 75°F | 30.19 | 65°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
Edit Hide
Key West, FL,
NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE