Marine Weather and Tide Forecast for Stock Island, FL
 | Sunrise 6:41 AM Sunset 8:06 PM Moonrise 9:26 AM Moonset 11:31 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
GMZ044 Expires:202605201430;;323139 Fzus52 Kkey 200221 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 1021 pm edt Tue may 19 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>044-201430- 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- 1021 pm edt Tue may 19 2026
Overnight - East winds near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 2 to 3 feet. NEarshore waters a moderate chop. A chance of showers with a slight chance of Thunderstorms.
Wednesday - East winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of cosgrove shoal light. NEarshore waters a light to moderate chop. A chance of showers with a slight chance of Thunderstorms.
Wednesday night - East winds 10 to 15 knots. Seas 1 to 2 feet, except 2 to 3 feet west of cosgrove shoal light. NEarshore waters a light to moderate chop. A chance of showers with a slight chance of Thunderstorms.
Thursday - East winds near 10 knots, increasing to 10 to 15 knots. Seas 1 to 2 feet. NEarshore waters a light chop, becoming a light to moderate chop. A slight chance of showers and Thunderstorms.
Thursday night - East winds 10 to 15 knots, becoming east to southeast. Seas around 2 feet. NEarshore waters a light to moderate chop. A slight chance of showers and Thunderstorms.
Friday - East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. A slight chance of showers and Thunderstorms.
Friday night - East to southeast winds 10 to 15 knots. Seas around 2 feet. NEarshore waters a light to moderate chop. A slight chance of showers and Thunderstorms.
Saturday - East to southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop. A slight chance of showers and Thunderstorms.
Saturday night - East to southeast 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters a light to moderate chop. A chance of showers with a slight chance of Thunderstorms.
Sunday - East to southeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop. A slight chance of showers and Thunderstorms.
Sunday night - East winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. NEarshore waters choppy. A chance of showers with a slight chance of Thunderstorms.
coastal waters forecast for the florida keys national weather service key west fl 1021 pm edt Tue may 19 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>044-201430- 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- 1021 pm edt Tue may 19 2026
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 1021 Pm Edt Tue May 19 2026
Synopsis - Surface high pressure centered north of bermuda will continue to support gentle to moderate breezes across the florida keys waters. Breezes are on track to slowly decrease during the week with peaks expected during the evenings and lulls during the day. Rain and Thunder chances will remain above normal through much of the week.
the approximate shoreward edge of the gulf stream as of may 12 - .
35 nm south of dry tortugas light - .on loggerhead key. 9 nm south of cosgrove shoal light - .off the marquesas keys. 6 nm south of sand key light - .off key west. 7 nm south of looe key - .off big pine key. 6 nm southeast of sombrero key light - .off marathon. 6 nm southeast of alligator reef light - .off islamorada. 4 nm southeast of molasses reef light - .off key largo. 3 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 12 - .
35 nm south of dry tortugas light - .on loggerhead key. 9 nm south of cosgrove shoal light - .off the marquesas keys. 6 nm south of sand key light - .off key west. 7 nm south of looe key - .off big pine key. 6 nm southeast of sombrero key light - .off marathon. 6 nm southeast of alligator reef light - .off islamorada. 4 nm southeast of molasses reef light - .off key largo. 3 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 Stock Island, FL
NEW! Add second zone forecast
| Cow Key Channel Click for Map Wed -- 03:57 AM EDT 0.59 feet High Tide Wed -- 06:41 AM EDT Sunrise Wed -- 08:07 AM EDT 0.29 feet Low Tide Wed -- 10:25 AM EDT Moonrise Wed -- 03:00 PM EDT 1.31 feet High Tide Wed -- 08:06 PM EDT Sunset Wed -- 10:06 PM EDT -0.23 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Cow Key Channel, Florida, Tide feet
| 12 am |
| 0 |
| 1 am |
| 0.2 |
| 2 am |
| 0.4 |
| 3 am |
| 0.5 |
| 4 am |
| 0.6 |
| 5 am |
| 0.5 |
| 6 am |
| 0.4 |
| 7 am |
| 0.3 |
| 8 am |
| 0.3 |
| 9 am |
| 0.3 |
| 10 am |
| 0.5 |
| 11 am |
| 0.7 |
| 12 pm |
| 0.9 |
| 1 pm |
| 1.1 |
| 2 pm |
| 1.3 |
| 3 pm |
| 1.3 |
| 4 pm |
| 1.2 |
| 5 pm |
| 1 |
| 6 pm |
| 0.7 |
| 7 pm |
| 0.4 |
| 8 pm |
| 0.1 |
| 9 pm |
| -0.2 |
| 10 pm |
| -0.2 |
| 11 pm |
| -0.2 |
| Key West Click for Map Wed -- 02:02 AM EDT 0.91 feet High Tide Wed -- 06:02 AM EDT 0.41 feet Low Tide Wed -- 06:41 AM EDT Sunrise Wed -- 10:26 AM EDT Moonrise Wed -- 01:05 PM EDT 2.01 feet High Tide Wed -- 08:01 PM EDT -0.32 feet Low Tide Wed -- 08:06 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
Key West, Florida, Tide feet
| 12 am |
| 0.6 |
| 1 am |
| 0.8 |
| 2 am |
| 0.9 |
| 3 am |
| 0.8 |
| 4 am |
| 0.7 |
| 5 am |
| 0.5 |
| 6 am |
| 0.4 |
| 7 am |
| 0.5 |
| 8 am |
| 0.7 |
| 9 am |
| 1 |
| 10 am |
| 1.4 |
| 11 am |
| 1.7 |
| 12 pm |
| 1.9 |
| 1 pm |
| 2 |
| 2 pm |
| 1.9 |
| 3 pm |
| 1.6 |
| 4 pm |
| 1.1 |
| 5 pm |
| 0.6 |
| 6 pm |
| 0.1 |
| 7 pm |
| -0.2 |
| 8 pm |
| -0.3 |
| 9 pm |
| -0.2 |
| 10 pm |
| -0.1 |
| 11 pm |
| 0.2 |
FXUS62 KKEY 200211 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 1011 PM EDT Tue May 19 2026
New DISCUSSION, MARINE, AVIATION
KEY MESSAGES
- Very warm and humid conditions over the next few days will lead to a generally moderate risk of heat illness with periods of high risk conditions.
- High confidence that rain and thunder chances to gradually decrease starting tomorrow.
- Breezes on track to gradually decrease to gentle to moderate during the second half of the week.
DISCUSSION
Issued at 1010 PM EDT Tue May 19 2026 Conditions across the Florida Keys continue to be warm and muggy.
Dew points are lingering in the lower to mid 70s with temperatures struggling to drop into the lower 80s. KBYX radar observations this evening are tracking shallow, fast moving showers across the Florida Keys waters. GOES East satellite observations indicate most of the clouds tonight are high altitude cirrus clouds generated by thunderstorms near Tampa. That observation is further corroborated by the 00Z KKEY radiosonde.
The balloon highlighted a higher moisture concentration near 35,000 feet amidst 50 knot winds. The rest of the sounding was not as interesting. Winds were nearly uniform from the surface to about 10,000 feet. Sampled PWAT also rose above the 90th percentile value for the day. Overall, the weather pattern tonight does not suggest many necessary changes to the forecast.
There is an interesting feature near the Florida Keys, a mid- latitude cutoff low located north of the Bahamas. Winds circulating around this feature are responsible for the river of cirrus aloft. On satellite, the cirrus gives the appearance of a moist upper atmosphere, but the KKEY sounding suggests otherwise.
Dry air aloft continues to stream towards the Keys, as seen in the 500-250 mb layer. These features are likely why showers have been struggling to develop into thunderstorms. In addition, the cutoff low is playing a role in mitigating the ridging across the southeastern US. Breezes slackened earlier this evening as the pressure gradient across the Atlantic weakened. On the plus side, winds are once again below Small Craft Should Exercise Caution thresholds. On the negative side, slackening breezes mean less relief from the heat and humidity. The message to take here is to brace for summer like conditions during the rest of the week.
MARINE
Issued at 1010 PM EDT Tue May 19 2026 No watches, warnings, or advisories are in effect for the Florida Keys nearshore and offshore waters. From synopsis, surface high pressure centered north of Bermuda will continue to support gentle to moderate breezes across the Florida Keys waters. Breezes are on track to slowly decrease during the week with peaks expected during the evenings and lulls during the day. Rain and thunder chances will remain above normal through much of the week.
AVIATION
(00Z TAFS)
Issued at 1010 PM EDT Tue May 19 2026 VFR conditions will prevail at EYW and MTH for the upcoming period. Near surface winds are on track to slowly decrease after sunrise with medium confidence gusts will drop out late. Shallow showers are still able to form near the terminals, but models do not suggest enough confidence to include VCSH in the TAFs.
PRELIMINARY POINT TEMPS/POPS
Key West 80 90 81 91 / 30 30 30 20 Marathon 79 86 80 87 / 40 30 30 20
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...None.
Area Forecast Discussion National Weather Service Key West FL 1011 PM EDT Tue May 19 2026
New DISCUSSION, MARINE, AVIATION
KEY MESSAGES
- Very warm and humid conditions over the next few days will lead to a generally moderate risk of heat illness with periods of high risk conditions.
- High confidence that rain and thunder chances to gradually decrease starting tomorrow.
- Breezes on track to gradually decrease to gentle to moderate during the second half of the week.
DISCUSSION
Issued at 1010 PM EDT Tue May 19 2026 Conditions across the Florida Keys continue to be warm and muggy.
Dew points are lingering in the lower to mid 70s with temperatures struggling to drop into the lower 80s. KBYX radar observations this evening are tracking shallow, fast moving showers across the Florida Keys waters. GOES East satellite observations indicate most of the clouds tonight are high altitude cirrus clouds generated by thunderstorms near Tampa. That observation is further corroborated by the 00Z KKEY radiosonde.
The balloon highlighted a higher moisture concentration near 35,000 feet amidst 50 knot winds. The rest of the sounding was not as interesting. Winds were nearly uniform from the surface to about 10,000 feet. Sampled PWAT also rose above the 90th percentile value for the day. Overall, the weather pattern tonight does not suggest many necessary changes to the forecast.
There is an interesting feature near the Florida Keys, a mid- latitude cutoff low located north of the Bahamas. Winds circulating around this feature are responsible for the river of cirrus aloft. On satellite, the cirrus gives the appearance of a moist upper atmosphere, but the KKEY sounding suggests otherwise.
Dry air aloft continues to stream towards the Keys, as seen in the 500-250 mb layer. These features are likely why showers have been struggling to develop into thunderstorms. In addition, the cutoff low is playing a role in mitigating the ridging across the southeastern US. Breezes slackened earlier this evening as the pressure gradient across the Atlantic weakened. On the plus side, winds are once again below Small Craft Should Exercise Caution thresholds. On the negative side, slackening breezes mean less relief from the heat and humidity. The message to take here is to brace for summer like conditions during the rest of the week.
MARINE
Issued at 1010 PM EDT Tue May 19 2026 No watches, warnings, or advisories are in effect for the Florida Keys nearshore and offshore waters. From synopsis, surface high pressure centered north of Bermuda will continue to support gentle to moderate breezes across the Florida Keys waters. Breezes are on track to slowly decrease during the week with peaks expected during the evenings and lulls during the day. Rain and thunder chances will remain above normal through much of the week.
AVIATION
(00Z TAFS)
Issued at 1010 PM EDT Tue May 19 2026 VFR conditions will prevail at EYW and MTH for the upcoming period. Near surface winds are on track to slowly decrease after sunrise with medium confidence gusts will drop out late. Shallow showers are still able to form near the terminals, but models do not suggest enough confidence to include VCSH in the TAFs.
PRELIMINARY POINT TEMPS/POPS
Key West 80 90 81 91 / 30 30 30 20 Marathon 79 86 80 87 / 40 30 30 20
KEY WATCHES/WARNINGS/ADVISORIES
FL...None.
GM...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| KYWF1 - 8724580 - Key West, FL | 3 mi | 56 min | ESE 8G | 81°F | 86°F | 30.02 | ||
| SANF1 - Sand Key, FL | 10 mi | 46 min | ESE 17G | 81°F | 30.00 | 73°F | ||
| 42095 | 16 mi | 56 min | 82°F | 83°F | 3 ft | |||
| SMKF1 - Sombrero Key, FL | 34 mi | 36 min | E 15G | 82°F | 30.01 | 77°F | ||
| VCAF1 - 8723970 - Vaca Key, FL | 35 mi | 56 min | E 6G | 81°F | 84°F | 30.01 |
Wind History for Key West, FL
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KEYW
Terminal Aerodrome Forecast (TAF) for KEYW
Wind History Graph: EYW
(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