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Hydrograph River at a Glance Download
Gulf of Mexico Tide Gauge at CEDAR KEY (in MHHW) Tide Height (ft)CKYF1(plotting HMIRG) Graph Created (5:38PM Jun 20, 2021)ObservedLatest observed value: 0.29 ft at 5:42 AM EDT 15-Jun-2021. Flood Stage is 2.2 ft
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Tabular Data (UTC)
Tabular Data (EDT)
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Datum: Not Available
NOTE: Water levels are referenced to the Mean Higher High Water (MHHW) Datum. This datum can be used to approximate sea water inundation of normally dry ground near the coast. For specific impacts, please refer to the statements on this page.

NOTE: Graphical forecasts are not available for the Gulf of Mexico Tide Gauge at CEDAR KEY (in MHHW). During times of high water, forecast crest information can be found in the text products.

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Flood Categories (in feet)
Major Flood Stage: 6.2
Moderate Flood Stage: 4
Flood Stage: 2.2
Action Stage: 1.5
Low Stage (in feet): -5

Historic Crests
(1) 6.10 ft on 09/02/2016
(2) 5.41 ft on 08/31/1985
(3) 5.15 ft on 10/07/1996
(4) 5.13 ft on 03/13/1993
(5) 4.15 ft on 06/19/1972
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(P): Preliminary values subject to further review.

Recent Crests
Currently none available.

Low Water Records
(1) -9.43 ft on 09/11/2017
(2) -8.01 ft on 09/18/1947
(3) -7.30 ft on 06/09/1966
(4) -7.25 ft on 01/16/1972
(5) -6.81 ft on 12/17/1972
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Zoom Level:16
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
14 (or 15.8 ft MSL) 10 to 14 feet of water overtopping Key. Many homes likely washed off their foundation.
8 (or 9.8 ft MSL) Numerous homes with 4 to 6 feet of water inside. Businesses near 2nd street and C street have 1 to 3 feet of water inside. Parts of Highway 24 under 4 feet of moving water with damaging wave action.
6.2 (or 8 ft MSL) Half of the Key is under water. Two feet of water on 2nd street in downtown. Airport runway flooded. Parts of Highway 24 under 2 feet of moving water. Numerous homes with 2 to 4 feet of water inside with damaging wave action.
5.2 (or 7 ft MSL) Dock Street and downtown roads begin to flood.
4 (or 5.8 ft MSL) Parts of Highway 24 leading to the key flood. Water comes up to or floods many low lying coastal homes with up to 1 foot of water inside.
3 (or 4.8 ft MSL) 12 homes and businesses begin to flood in low lying areas.
2.2 (or 4 ft MSL) A few inches of water on low lying roads, water near a few homes and businesses.
1.5 (or 3.3 ft MSL) Water on the side of low lying roads.
About This Location Collapse

Latitude: 29.135000° N, Longitude: 83.031700° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 2.2 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other -3.79 Not Available Mean Higher High Water. Used to approximate inundation.
Additional Information Collapse
Tide data is reported in MHHW. Site is currently not posting accurate readings. Working to fix these errors.
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Hydrologic Resources Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Tampa Bay Area Weather Forecast Office
2525 14th Ave SE
Ruskin, FL 33570
(813) 645-2323
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Page last modified: 2-Nov-2020 7:30 PM
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