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Marine Weather and Tides
Version 3.4 |
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it. 8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue. 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. |
Sunrise 7:11AM | Sunset 6:03PM | Sunday January 17, 2021 3:55 AM EST (08:55 UTC) | Moonrise 10:28AM | Moonset 10:23PM | Illumination 16% | ![]() |
GMZ043 Expires:202101170930;;036239 Fzus52 Kkey 170329 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 1029 Pm Est Sat Jan 16 2021 Florida Bay, Hawk Channel And Straits Of Florida From Ocean Reef To South Of Dry Tortugas, And The Extreme Southeastern Gulf Of Mexico, 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. Gmz042>044-170930- 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- 1029 Pm Est Sat Jan 16 2021
Overnight..Northwest winds 10 to 15 knots, becoming north and decreasing to near 10 knots. Seas 1 to 3 feet, except 3 to 5 feet west of cosgrove shoal light due to west swell. NEarshore waters a light to moderate chop, becoming a light chop.
Sunday..North to northeast winds near 10 knots, becoming northwest to north near 5 knots. Seas 1 to 2 feet, except 2 to 4 feet west of cosgrove shoal light due to west swell. NEarshore waters a light chop, becoming smooth.
Sunday night..Variable winds near 5 knots, becoming northwest. Seas 1 to 3 feet due to west swell. NEarshore waters smooth. Isolated showers.
Monday..Northwest to north winds 5 to 10 knots, becoming north and increasing to near 10 knots. Seas 1 to 3 feet. NEarshore waters becoming a light to moderate chop.
Monday night..Northeast winds increasing to near 15 knots. Seas 2 to 3 feet. NEarshore waters becoming a moderate chop.
Tuesday..Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 2 to 4 feet west of cosgrove shoal. NEarshore waters choppy.
Tuesday night..Northeast to east winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Wednesday..Northeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Wednesday night..East winds decreasing to 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters becoming a light to moderate chop.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop.
Thursday night..Southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop.
Overnight..Northwest winds 10 to 15 knots, becoming north and decreasing to near 10 knots. Seas 1 to 3 feet, except 3 to 5 feet west of cosgrove shoal light due to west swell. NEarshore waters a light to moderate chop, becoming a light chop.
Sunday..North to northeast winds near 10 knots, becoming northwest to north near 5 knots. Seas 1 to 2 feet, except 2 to 4 feet west of cosgrove shoal light due to west swell. NEarshore waters a light chop, becoming smooth.
Sunday night..Variable winds near 5 knots, becoming northwest. Seas 1 to 3 feet due to west swell. NEarshore waters smooth. Isolated showers.
Monday..Northwest to north winds 5 to 10 knots, becoming north and increasing to near 10 knots. Seas 1 to 3 feet. NEarshore waters becoming a light to moderate chop.
Monday night..Northeast winds increasing to near 15 knots. Seas 2 to 3 feet. NEarshore waters becoming a moderate chop.
Tuesday..Northeast to east winds 15 to 20 knots. Seas 2 to 3 feet, except 2 to 4 feet west of cosgrove shoal. NEarshore waters choppy.
Tuesday night..Northeast to east winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Wednesday..Northeast winds near 15 knots. Seas 2 to 3 feet. NEarshore waters a moderate chop.
Wednesday night..East winds decreasing to 10 to 15 knots. Seas 2 to 3 feet. NEarshore waters becoming a light to moderate chop.
Thursday..East winds 10 to 15 knots. Seas 1 to 3 feet. NEarshore waters a light to moderate chop.
Thursday night..Southeast winds near 10 knots. Seas 1 to 2 feet. NEarshore waters a light chop.
7 Day Forecast for Marine Location Near Duck Key, FL
Hourly EDIT Help
location: 24.79, -80.88 debug
Area Discussion for - Key West, FL
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS62 KKEY 170319 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 1019 PM EST Sat Jan 16 2021
DISCUSSION. High pressure centered over the southern Gulf of Mexico supports gentle to moderate northwesterly breezes across the Florida Keys. There is a bunch of cloud cover across the islands, both high cirrus and low-ish stratus, the stratus based right beneath the healthy inversion sampled by the 00Z KKEY RAOB. The high will lose continuity overnight as it slides east, degenerating into a fractured ridge axis. The northwest to north breezes will steadily decline overnight. Temperatures in the lower 60s will fall a few more degrees, with some locations touching the upper 50s. No changes needed or forecast.
MARINE. Small Craft Advisory in effect for the coastal waters west of Rebecca Shoal due to west to northwest swells as high as 7 feet. A pressure ridge will build eastwards across Florida tonight. A moderate west to northwest wind surge ongoing due to day time heating over Florida should abate after dark, after which light breezes will shift northerly. Breezes will slacken further on Sunday as the ridge axis shifts into the Keys. Another high pressure center will move east along the northern Gulf Coast Sunday through Monday, with gentle north to northeast breezes prevailing across the Keys. This high will strengthen over the Southeastern United States Monday night and Tuesday, with freshening northeast to east breezes over the Keys waters. The high will then settle slowly southward across the Florida peninsula on Wednesday, allowing breezes to relax.
AVIATION. Stratus layers will be off-and-on overnight based at 040-050, right at the large inversion sampled by the 00Z KKEY RAOB. Northerly breezes will tend to go variable Sunday afternoon.
PRELIMINARY POINT TEMPS/POPS. Key West 61 68 61 71 / 0 0 20 - Marathon 59 68 59 71 / 0 0 20 -
KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . Small Craft Advisory for GMZ033-034-055- 075.
Public/Marine/Fire . CLR Aviation/Nowcasts . CLR Data Acquisition . DR
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Weather Reporting Stations
EDIT (on/off)  Help NOTE: Click on distance to see the station location on a mapWind History for Vaca Key, FL
(wind in knots) EDIT (on/off)  Help4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | |
Last 24hr | NW G19 | NW G18 | NW | NW | NW | NW | NW | NW | NW G15 | NW | NW G18 | NW G18 | NW G16 | NW G15 | NW G12 | NW G10 | NW G11 | NW | NW G8 | N G7 | N G9 | NW G6 | N | NE |
1 day ago | N | N | NE | N G7 | N G6 | N G8 | NE | NE | NE | N | NE | NE | NE | NE | -- | N | S G10 | S | S G8 | S | SW G8 | W | W G11 | NW G17 |
2 days ago | NE | NE | NE | NE | N G12 | N G11 | N G14 | N G13 | NE G15 | N G13 | NE | NE G11 | NE | NE | NE | NE | NE | NE | N | N G5 | NW G5 | NW G7 | N |
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
The Florida Keys - Marathon International Airport, FL | 10 mi | 62 min | NNE 5 | 10.00 mi | Overcast | 61°F | 53°F | 75% | 1016.5 hPa |
Link to 5 minute data for KMTH
Wind History from MTH (wind in knots)
4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | |
Last 24hr | NW | NW G18 | NW | NW G19 | NW G17 | NW G19 | NW | NW | W | W G17 | NW G22 | NW G21 | NW | NW G17 | NW | N | N | NW | N | N | N | N | Calm | N |
1 day ago | N | NW | N | N | NW | N | N | NE | N | N | N | N | SE | Calm | Calm | Calm | S | SW | S | W | W | W | ||
2 days ago | NE | NE | N | NE | NE | N | N | N G16 | N | N | N | N | NE | N | NE | NE | N | NE | NE | N | N | N | N | N |
Tide / Current Tables for Long Key Channel (West), Florida
EDIT Weekend mode (on/off) (on/off)  Help One Week of DataLong Key Channel (West)
Click for Map
Sun -- 06:00 AM EST 1.17 feet High Tide
Sun -- 07:09 AM EST Sunrise
Sun -- 10:28 AM EST Moonrise
Sun -- 12:19 PM EST -0.20 feet Low Tide
Sun -- 05:57 PM EST Sunset
Sun -- 06:57 PM EST 0.77 feet High Tide
Sun -- 10:23 PM EST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 06:00 AM EST 1.17 feet High Tide
Sun -- 07:09 AM EST Sunrise
Sun -- 10:28 AM EST Moonrise
Sun -- 12:19 PM EST -0.20 feet Low Tide
Sun -- 05:57 PM EST Sunset
Sun -- 06:57 PM EST 0.77 feet High Tide
Sun -- 10:23 PM EST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
0.1 | 0.2 | 0.5 | 0.7 | 0.9 | 1.1 | 1.2 | 1.1 | 0.9 | 0.6 | 0.2 | -0.1 | -0.2 | -0.2 | -0 | 0.2 | 0.4 | 0.6 | 0.7 | 0.8 | 0.7 | 0.5 | 0.3 | 0.1 |
Tide / Current Tables for Long Key Viaduct, Florida Current
EDIT (on/off)  Help One Week of DataLong Key Viaduct
Click for Map
Sun -- 02:12 AM EST -0.00 knots Slack
Sun -- 05:39 AM EST -1.27 knots Max Ebb
Sun -- 07:09 AM EST Sunrise
Sun -- 09:01 AM EST 0.00 knots Slack
Sun -- 10:28 AM EST Moonrise
Sun -- 11:34 AM EST 0.90 knots Max Flood
Sun -- 02:56 PM EST -0.00 knots Slack
Sun -- 05:57 PM EST Sunset
Sun -- 06:10 PM EST -1.10 knots Max Ebb
Sun -- 09:28 PM EST 0.00 knots Slack
Sun -- 10:23 PM EST Moonset
Sun -- 11:50 PM EST 0.74 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 02:12 AM EST -0.00 knots Slack
Sun -- 05:39 AM EST -1.27 knots Max Ebb
Sun -- 07:09 AM EST Sunrise
Sun -- 09:01 AM EST 0.00 knots Slack
Sun -- 10:28 AM EST Moonrise
Sun -- 11:34 AM EST 0.90 knots Max Flood
Sun -- 02:56 PM EST -0.00 knots Slack
Sun -- 05:57 PM EST Sunset
Sun -- 06:10 PM EST -1.10 knots Max Ebb
Sun -- 09:28 PM EST 0.00 knots Slack
Sun -- 10:23 PM EST Moonset
Sun -- 11:50 PM EST 0.74 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
0.7 | 0.5 | 0.1 | -0.4 | -0.9 | -1.2 | -1.3 | -1 | -0.6 | -0 | 0.5 | 0.9 | 0.9 | 0.7 | 0.4 | -0 | -0.5 | -0.9 | -1.1 | -1 | -0.7 | -0.3 | 0.3 | 0.6 |
Weather Map
(on/off)  Help Weather Map
GEOS Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific Contential US Full GOES-East
Ground Weather Radar Station
Gulf Stream Current

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