Marine Weather and Tide Forecast for Key Colony Beach, FL
 | Sunrise 6:39 AM Sunset 8:09 PM Moonrise 3:16 PM Moonset 2:25 AM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
GMZ043 Expires:202605262045;;669035 Fzus52 Kkey 260839 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 439 am edt Tue may 26 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.
gmz042>044-262045- 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- 439 am edt Tue may 26 2026
.small craft advisory in effect - .
Today - East to southeast winds near 20 knots, decreasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. NEarshore waters rough, becoming choppy. A slight chance of showers and Thunderstorms.
Tonight - East to southeast winds 15 to 20 knots. Seas 3 to 4 feet, occasionally to 5 feet. NEarshore waters choppy. A chance of showers and Thunderstorms.
Wednesday - East to southeast winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters a moderate chop, becoming a light to moderate chop. A chance of showers and Thunderstorms.
Wednesday night - East to southeast winds 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. A chance of showers and Thunderstorms.
Thursday - Southeast winds near 10 knots, decreasing to 5 to 10 knots. Seas around 2 feet, subsiding to 1 to 2 feet. NEarshore waters a light chop, becoming smooth to a light chop. A chance of showers and Thunderstorms.
Thursday night - Southeast winds near 5 knots. Seas 1 to 2 feet, subsiding to around 1 foot. NEarshore waters smooth. A slight chance of showers and Thunderstorms.
Friday - Southeast winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. A slight chance of showers and Thunderstorms.
Friday night - Southeast winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. A chance of showers and Thunderstorms.
Saturday - Southeast to south winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. Showers likely with a chance of Thunderstorms.
Saturday night - Southeast to south winds 10 to 15 knots. Seas building to 2 to 3 feet. NEarshore waters a light to moderate chop. A chance of showers and Thunderstorms.
coastal waters forecast for the florida keys national weather service key west fl 439 am edt Tue may 26 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.
gmz042>044-262045- 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- 439 am edt Tue may 26 2026
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 439 Am Edt Tue May 26 2026
Synopsis - An atlantic high pressure system centered near bermuda will support fresh east to southeast breezes through tonight. A small craft advisory is in effect breezes will noticeably slacken and veer to the southeast to south as the high slides eastward and weakens by the middle of the week. Shower and Thunderstorm chances will increase for the middle and latter part of the work week.
the approximate shoreward edge of the gulf stream as of may 22 - .
22 nm south of dry tortugas light - .on loggerhead key. 9 nm south of cosgrove shoal light - .off the marquesas keys. 8 nm south of sand key light - .off key west. 8 nm south of looe key - .off big pine key. 6 nm southeast of sombrero key light - .off marathon. 4 nm southeast of alligator reef light - .off islamorada. 1 nm southeast of molasses reef light - .off key largo. 1 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 may 22 - .
22 nm south of dry tortugas light - .on loggerhead key. 9 nm south of cosgrove shoal light - .off the marquesas keys. 8 nm south of sand key light - .off key west. 8 nm south of looe key - .off big pine key. 6 nm southeast of sombrero key light - .off marathon. 4 nm southeast of alligator reef light - .off islamorada. 1 nm southeast of molasses reef light - .off key largo. 1 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 Tue -- 03:25 AM EDT Moonset Tue -- 06:14 AM EDT 1.81 feet High Tide Tue -- 06:36 AM EDT Sunrise Tue -- 01:01 PM EDT 0.09 feet Low Tide Tue -- 04:15 PM EDT Moonrise Tue -- 07:22 PM EDT 1.30 feet High Tide Tue -- 08:06 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
Boot Key Harbor bridge, Boot Key, Florida, Tide feet
| 12 am |
| 0.3 |
| 1 am |
| 0.5 |
| 2 am |
| 0.7 |
| 3 am |
| 1.1 |
| 4 am |
| 1.4 |
| 5 am |
| 1.7 |
| 6 am |
| 1.8 |
| 7 am |
| 1.8 |
| 8 am |
| 1.6 |
| 9 am |
| 1.2 |
| 10 am |
| 0.8 |
| 11 am |
| 0.4 |
| 12 pm |
| 0.2 |
| 1 pm |
| 0.1 |
| 2 pm |
| 0.2 |
| 3 pm |
| 0.4 |
| 4 pm |
| 0.7 |
| 5 pm |
| 0.9 |
| 6 pm |
| 1.2 |
| 7 pm |
| 1.3 |
| 8 pm |
| 1.3 |
| 9 pm |
| 1.1 |
| 10 pm |
| 0.8 |
| 11 pm |
| 0.6 |
| Moser Channel Click for Map Flood direction 346 true Ebb direction 164 true Tue -- 12:19 AM EDT -0.98 knots Max Ebb Tue -- 02:57 AM EDT 0.00 knots Slack Tue -- 03:25 AM EDT Moonset Tue -- 06:36 AM EDT Sunrise Tue -- 06:42 AM EDT 0.71 knots Max Flood Tue -- 08:58 AM EDT -0.00 knots Slack Tue -- 12:50 PM EDT -1.37 knots Max Ebb Tue -- 03:57 PM EDT 0.00 knots Slack Tue -- 04:15 PM EDT Moonrise Tue -- 07:34 PM EDT 0.89 knots Max Flood Tue -- 08:07 PM EDT Sunset Tue -- 10:01 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 |
| 1 am |
| -0.9 |
| 2 am |
| -0.5 |
| 3 am |
| 0 |
| 4 am |
| 0.4 |
| 5 am |
| 0.6 |
| 6 am |
| 0.7 |
| 7 am |
| 0.7 |
| 8 am |
| 0.5 |
| 9 am |
| -0 |
| 10 am |
| -0.6 |
| 11 am |
| -1 |
| 12 pm |
| -1.3 |
| 1 pm |
| -1.4 |
| 2 pm |
| -1.1 |
| 3 pm |
| -0.6 |
| 4 pm |
| 0 |
| 5 pm |
| 0.4 |
| 6 pm |
| 0.6 |
| 7 pm |
| 0.8 |
| 8 pm |
| 0.9 |
| 9 pm |
| 0.6 |
| 10 pm |
| 0 |
| 11 pm |
| -0.5 |
FXUS62 KKEY 260930 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 530 AM EDT Tue May 26 2026
New DISCUSSION, MARINE, AVIATION
KEY MESSAGES
- A Small Craft Advisory is in effect for all Keys Coastal Waters
- Very warm and humid conditions over the next few days will lead to bouts of major risk of heat illness in the afternoon hours, with little relief during the overnight periods.
- Quick moving showers and storms may bring bursts of moderate to heavy rainfall, reduced visibility, and gusty winds through today.
- A general 2-4" of rainfall and thunderstorms, with locally higher amounts, are possible at most island communities Wednesday through next Sunday.
DISCUSSION
Issued at 530 AM EDT Tue May 26 2026 Scattered showers have persisted across the coastal waters overnight into the early morning hours for the Florida Keys. While a majority of these showers have been light showers, a few have grown tall enough to shoot off a few lightning strikes before collapsing. Temperatures across the island chain are in the lower 80s with dewpoints in the mid 70s making for yet again another muggy morning. Across the Reef wind observations are southeasterly at near 20 knots. A Small Craft Advisory is in effect for all coastal waters. As the day progresses, the high that has been assisting with freshening breezes will shift easterly allowing the pressure gradient to weaken resulting in a slight slackening of winds occurring this afternoon into this evening.
Wednesday, the synoptic pattern will change as the ridges continue to shift easterly further into the Atlantic and makes way for troughing to enter the region. The resulting more southerly direction for winds will bring in tropical moisture creating more of a chance for showers. While heavy rain is possible in these showers, we are not mentioned in the Excessive Rainfall Outlook until Friday as a Marginal Risk, though we have been placed under general thunder for Days 1-3 in the Severe Weather Outlook. The shift in pattern and resulting showers and storms probabilities will continue to be closely monitored and adjusted as needed throughout the coming days.
MARINE
Issued at 530 AM EDT Tue May 26 2026 A Small Craft Advisory is in effect for all Florida Keys waters.
From synopsis, an Atlantic high pressure system centered near Bermuda will support fresh east to southeast breezes through tonight. A Small Craft Advisory is in effect Breezes will noticeably slacken and veer to the southeast to south as the high slides eastward and weakens by the middle of the week. Shower and thunderstorm chances will increase for the middle and latter part of the work week.
AVIATION
(06Z TAFS)
Issued at 530 AM EDT Tue May 26 2026 VFR conditions will prevail at both EYW and MTH through the TAF period. Isolated showers are possible throughout the morning but VCSH is not included due to the lack of confidence on shower locating impacting either terminal. Near surface winds will be southeasterly at near 15 knots with gusts of 20 to 25 knots through this afternoon.
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...Small Craft Advisory until 8 PM EDT this evening for GMZ031>035- 042>044-052>055-072>075.
Area Forecast Discussion National Weather Service Key West FL 530 AM EDT Tue May 26 2026
New DISCUSSION, MARINE, AVIATION
KEY MESSAGES
- A Small Craft Advisory is in effect for all Keys Coastal Waters
- Very warm and humid conditions over the next few days will lead to bouts of major risk of heat illness in the afternoon hours, with little relief during the overnight periods.
- Quick moving showers and storms may bring bursts of moderate to heavy rainfall, reduced visibility, and gusty winds through today.
- A general 2-4" of rainfall and thunderstorms, with locally higher amounts, are possible at most island communities Wednesday through next Sunday.
DISCUSSION
Issued at 530 AM EDT Tue May 26 2026 Scattered showers have persisted across the coastal waters overnight into the early morning hours for the Florida Keys. While a majority of these showers have been light showers, a few have grown tall enough to shoot off a few lightning strikes before collapsing. Temperatures across the island chain are in the lower 80s with dewpoints in the mid 70s making for yet again another muggy morning. Across the Reef wind observations are southeasterly at near 20 knots. A Small Craft Advisory is in effect for all coastal waters. As the day progresses, the high that has been assisting with freshening breezes will shift easterly allowing the pressure gradient to weaken resulting in a slight slackening of winds occurring this afternoon into this evening.
Wednesday, the synoptic pattern will change as the ridges continue to shift easterly further into the Atlantic and makes way for troughing to enter the region. The resulting more southerly direction for winds will bring in tropical moisture creating more of a chance for showers. While heavy rain is possible in these showers, we are not mentioned in the Excessive Rainfall Outlook until Friday as a Marginal Risk, though we have been placed under general thunder for Days 1-3 in the Severe Weather Outlook. The shift in pattern and resulting showers and storms probabilities will continue to be closely monitored and adjusted as needed throughout the coming days.
MARINE
Issued at 530 AM EDT Tue May 26 2026 A Small Craft Advisory is in effect for all Florida Keys waters.
From synopsis, an Atlantic high pressure system centered near Bermuda will support fresh east to southeast breezes through tonight. A Small Craft Advisory is in effect Breezes will noticeably slacken and veer to the southeast to south as the high slides eastward and weakens by the middle of the week. Shower and thunderstorm chances will increase for the middle and latter part of the work week.
AVIATION
(06Z TAFS)
Issued at 530 AM EDT Tue May 26 2026 VFR conditions will prevail at both EYW and MTH through the TAF period. Isolated showers are possible throughout the morning but VCSH is not included due to the lack of confidence on shower locating impacting either terminal. Near surface winds will be southeasterly at near 15 knots with gusts of 20 to 25 knots through this afternoon.
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...Small Craft Advisory until 8 PM EDT this evening for GMZ031>035- 042>044-052>055-072>075.
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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