Monday, July26, 2021
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Marine Weather and Tides
Marathon, FL

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:51AMSunset 8:15PM Monday July 26, 2021 8:45 PM EDT (00:45 UTC) Moonrise 9:31PMMoonset 8:16AM Illumination 93% Phase: Waning Gibbous; Moon at 17 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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GMZ053 Expires:202107270245;;499951 Fzus52 Kkey 262032 Cwfkey Coastal Waters Forecast For The Florida Keys National Weather Service Key West Fl 432 Pm Edt Mon Jul 26 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. Gmz052>055-072>075-270245- 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- 432 Pm Edt Mon Jul 26 2021
Tonight..Southeast to south winds 5 to 10 knots. Seas around 1 foot. Scattered showers and isolated Thunderstorms.
Tuesday..Variable winds 5 to 10 knots. Seas around 1 foot. Scattered showers and isolated Thunderstorms.
Tuesday night..Southeast winds 5 to 10 knots. Seas around 1 foot. Isolated showers and Thunderstorms.
Wednesday..Variable winds near 5 knots, increasing to 5 to 10 knots. Seas around 1 foot. Isolated showers and Thunderstorms.
Wednesday night and Thursday..East to southeast winds near 10 knots. Seas 1 to 2 feet. Isolated showers and Thunderstorms.
Thursday night..East to southeast winds 10 to 15 knots. Seas building to 2 to 3 feet. Isolated showers and Thunderstorms.
Friday..East to southeast winds near 10 knots. Seas around 2 feet. Scattered showers and isolated Thunderstorms.
Friday night..East to southeast winds near 10 knots. Seas 1 to 2 feet. Scattered showers and isolated Thunderstorms.
Saturday and Saturday night..East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated Thunderstorms.


7 Day Forecast for Marine Location Near Marathon, FL
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location: 24.73, -81.03     debug


Area Discussion for - Key West, FL
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FXUS62 KKEY 261848 AFDKEY

Area Forecast Discussion National Weather Service Key West FL 248 PM EDT Mon Jul 26 2021

DISCUSSION. Water vapor imagery show upper-level lows spinning in the western Gulf and over the eastern tip of Cuba. Another weak low pressure is still sitting off the coast of the FL/GA state line and is expected to move inland over the next few hours. Ridging is currently trying to build back in from the east as this low moves inland, which is helping to support gentle to light southeast to south breezes across the Florida Keys and surrounding coastal waters. Shower activity has remained isolated and showers have been struggling to build. Little thunder has been observed so far today, indicating that most showers have remained relatively shallow. A similar environment looks to hang around overnight tonight, so isolated to scattered showers will likely continue after a lull this afternoon.

As ridging continues to build back into the area, our winds will remain from the southeast to south before taking on more of an east to southeasterly direction by mid week. Winds will be light and variable at times. Looking aloft, a TUTT cell currently over the eastern tip of Cuba will trek across the length of the island and move into the Straits of Florida early on Wednesday. Currently, there is very little convective activity associated with this feature and forecast soundings actually show drier air moving in around the time when the TUTT cell makes its closest approach to the Keys on Tuesday night through Wednesday night, so have nudged PoPs down. No other features of note look to move through the area through the extended forecast, so mesoscale processes will likely dominate our weather. With light flow, cloud line development is possible over the next week, so have retained near climatology rain chances (20-30%). Temperatures will remain near normal through the forecast period, with highs generally near 90 degrees and lows near 80 degrees. A fairly typical July week weather-wise is ahead for the Florida Keys.

MARINE. There are no watches, warnings, or advisories are in effect for the Florida Keys coastal waters. From synopsis, Low pressure centered east of north Florida will move inland over the the coast of northeast Florida or Georgia this evening. This will allow a ridge over the central Atlantic to build across the Florida Keys and South Florida throughout the week. Generally southeast gentle to occasionally moderate breezes and near-normal rain and thunder chances are expected.

AVIATION. VFR conditions will prevail at both island terminals through 18z Tuesday afternoon. While there may be episodes of isolated shower or thunderstorm activity, confidence in timing or impacts is far too low to include mention of VCSH at this time. Near-surface winds will generally be from the southeast to south at 5 to 7 knots.

CLIMATE. On this day in 2007, the daily record warm low temperature of 87F was recorded. This is the warmest low temperature ever recorded in Key West in July and ties the warmest low temperature ever recorded in Key West. Temperature records date back to 1872.

KEY WATCHES/WARNINGS/ADVISORIES. FL . None. GM . None.

Public/Marine/Fire . NB Aviation/Nowcasts . BT Data Acquisition . KR

Visit us on the web at weather.gov/key

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
VCAF1 - 8723970 - Vaca Key, FL 4 mi52 min SSE 4.1 G 7 85°F 91°F1015.3 hPa
SMKF1 - Sombrero Key, FL 8 mi36 min SSE 7 G 8 84°F 1015.4 hPa76°F
LONF1 - Long Key, FL 12 mi36 min 5.1 G 8 85°F 1015.6 hPa75°F
PKYF1 - Peterson Key, FL 20 mi106 min 91°F
LRKF1 - Little Rabbit Key, FL 20 mi166 min 92°F
JKYF1 - Johnson Key, FL 23 mi106 min 91°F
MUKF1 - Murray Key, FL 26 mi106 min 90°F
BOBF1 - Bob Allen, FL 28 mi106 min 91°F
WRBF1 - Whipray Basin, FL 28 mi106 min E 2.9 91°F
BKYF1 29 mi106 min 94°F
GBTF1 - Garfield Bight, FL 33 mi106 min 93°F
TBYF1 34 mi106 min 94°F
WWEF1 35 mi166 min 90°F
LMDF1 - Little Madeira, FL 37 mi166 min 91°F
BNKF1 - Butternut Key, FL 37 mi106 min 91°F
LRIF1 39 mi166 min 91°F
TRRF1 - Taylor River, FL 39 mi106 min 92°F
CWAF1 39 mi166 min 89°F
NRRF1 42 mi106 min 88°F
DKKF1 - Duck Key, FL 42 mi166 min 90°F
TCVF1 - Trout Cove, FL 43 mi106 min 91°F
SREF1 43 mi106 min 89°F
KYWF1 - 8724580 - Key West, FL 43 mi52 min SSE 4.1 G 8
JBYF1 43 mi106 min 92°F
BWSF1 - Blackwater Sound, FL 44 mi166 min 90°F
GBIF1 - Gunboat Island, FL 45 mi106 min 88°F
LBSF1 - Little Blackwater, FL 46 mi166 min 91°F
LSNF1 - Long Sound, FL 46 mi106 min 90°F
TPEF1 - Tarpon Bay East, FL 47 mi106 min 87°F
HCEF1 - Highway Creek, FL 48 mi106 min 91°F
MNBF1 48 mi106 min 91°F
HREF1 48 mi106 min 87°F
THRF1 48 mi166 min 91°F
CANF1 - Cane Patch, FL 48 mi106 min 84°F
SANF1 - Sand Key, FL 49 mi36 min SSE 7 G 9.9 84°F 1015.2 hPa74°F

Wind History for Vaca Key, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
The Florida Keys - Marathon International Airport, FL1 mi53 minS 410.00 miPartly Cloudy85°F76°F75%1014.8 hPa

Link to 5 minute data for KMTH

Wind History from MTH (wind in knots)
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Last 24hrS4SE5SE6SE8S6SE4644S4S3S4S4S3E4SE5SE5SE5S7S5S6S54S4
1 day agoS34CalmN3CalmSW4W53S5S7SW435SE4S5N6NW7W4344S43S3
2 days agoW3CalmSW3S3SW5W4SW4W4SW4W6E7
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Tide / Current Tables for Vaca Key-Fat Deer Key bridge, Florida
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Vaca Key-Fat Deer Key bridge
Click for Map
Mon -- 04:41 AM EDT     0.25 feet Low Tide
Mon -- 06:49 AM EDT     Sunrise
Mon -- 09:15 AM EDT     Moonset
Mon -- 10:52 AM EDT     2.04 feet High Tide
Mon -- 06:05 PM EDT     -0.07 feet Low Tide
Mon -- 08:11 PM EDT     Sunset
Mon -- 10:31 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.210.80.50.30.30.50.81.31.71.921.91.61.20.80.30-0.100.30.60.91.2

Tide / Current Tables for Moser Channel (swingbridge), Florida Current
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Moser Channel (swingbridge)
Click for Map
Mon -- 02:27 AM EDT     -0.00 knots Slack
Mon -- 05:27 AM EDT     -1.95 knots Max Ebb
Mon -- 06:50 AM EDT     Sunrise
Mon -- 08:37 AM EDT     0.00 knots Slack
Mon -- 09:16 AM EDT     Moonset
Mon -- 11:17 AM EDT     1.44 knots Max Flood
Mon -- 02:13 PM EDT     -0.00 knots Slack
Mon -- 05:34 PM EDT     -2.29 knots Max Ebb
Mon -- 08:12 PM EDT     Sunset
Mon -- 08:57 PM EDT     0.00 knots Slack
Mon -- 10:31 PM EDT     Moonrise
Mon -- 11:51 PM EDT     1.73 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.40.5-0.6-1.5-1.9-1.9-1.4-0.60.41.11.41.410.2-0.8-1.7-2.2-2.2-1.8-1011.6

Weather Map
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GEOS Local Image of Southeast    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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