Tide Station at St Augustine Municipal Marina (in MHHW)
Florida — Water Level & Flood Stage
Located in St. Johns County, Florida on the Tide Station. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: SMFF1). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
3.7 ft
Moderate Flood
2.5 ft
Minor Flood
1.6 ft
Action Stage
1.2 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
7 ft
Flooding of historic proportions in St. Augustine and Anastasia Island. Access into St. Augustine is impossible as Ponce De Leon Blvd near SR 16 is flooded at this level. Access into Anastasia Island north of R B Hunt Elementary school is impossible. Most structures in the area experience flooding, some several feet deep. The approach road surface is flooded for the Vilano Beach Causeway, preventing access into the area.
5 ft
Widespread flooding impacts much of St. Augustine and Anastasia Island. Roadways in the historical district are completely impassable as are many areas along the San Sebastian River. Water approaches Ponce De Leon Blvd. Access into Anastasia Island north of Lighthouse Park is impossible, with much of the area flooded, with significant number of structures flooded. In Vilano Beach. flooding becomes considerable south of the causeway, with several roadways impassable along with structure flooding increasing
4 ft
Considerable flooding impacts much of St. Augustine, either along the waterfront near the marina or from the San Sebastian River. A1A in St. Augustine is impassable as is King Street. Numerous homes not elevated along and east of Riberia Street are flooded. On Anastasia Island, significant structure flooding occurs in South Davis Shores. Numerous residences in North Davis Shores begin to flood. Access into this area is impossible due to widespread road flooding.
3.7 ft
In St. Augustine, considerable flooding occurs. Water overtops the seawall along Avenida Menendez, flooding the road north and south of the Bridge of Lions. Flooding expands south of King Street as water expands out of Maria Sanchez Lake as well as flooding from the San Sebastian River. Access to the King Street Bridge is impossible above this level. On Anastasia Island, travel through much of South Davis Shores is impossible, with numerous homes flooding, particularly along Coquina and Arricola Avenues.
3 ft
Flooding on Anastasia Island and South Davis Shores worsens with several homes beginning to flood. Several neighborhood roads are impassable. With Anastasia Blvd flooding near the Bridge of Lions, the bridge itself is subject to closure at this level. Flooding expands into North Davis Shores. On the mainland, flooding expands out of Maria Sancehz Lake, reaching King Street. Flooding begins along the waterfront near the Castillo de San Marcos, with the parking lot affected.
2.5 ft
Road flooding becomes more significant on Anastasia Island, with many roadways in South Davis Shores flooding, with portions of Coquina Avenue becoming impassable. Flooding begins to approach residences in this area. Water also floods onto the outside travel lanes of Anastasia Blvd near the approaches to the Bridge of Lions. In St. Augustine, flooding begins along Riberia Street and further expands out of Maria Sanchez Lake as far north as Bridge Street. Transportation is this area becomes challenging.
2 ft
Flooding begins to expand throughout South Davis Shores, with areas nearer the Matanzas River most affected. Portions of Coquina Avenue and Arricola Avenue begin to flood. In St. Augustine, Lake Maria Sanchez begins to flood onto Cordova Street.
1.6 ft
In St. Augustine on Anastasia Island, several canals and marshlands flood south of A1A. Water begins to flood south of A1A. Water begins to flood some backyards in parts of South Davis Shores.
Impact statements from the National Weather Service, describing what typically happens at each water level.
Low-Water Impacts
5 ft
Stage needed to inundate designated Gulf Sturgeon critical habitat below Jim Woodruff Lock and Dam.
3 ft
Temporary (not sustainable) operating level for of Scholz Power Plant
What happens as water levels drop, per the National Weather Service.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Oct 11, 2025 | 3 ft | — |
| Oct 11, 2025 | 3 ft | — |
| Oct 10, 2025 | 2.97 ft | — |
| Oct 10, 2025 | 2.97 ft | — |
| Sep 9, 2025 | 2.35 ft | — |
About This Gauge
NWS LID
SMFF1
River
Tide Station
County
St. Johns, FL
Coordinates
29.8914°N, 81.3097°W
Get Flood Alerts for Tide Station
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Tide Station at St Augustine Municipal Marina (in MHHW)?
The Tide Station at St Augustine Municipal Marina (in MHHW) gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Tide Station at St Augustine Municipal Marina (in MHHW)?
The NWS-defined flood stage for Tide Station at St Augustine Municipal Marina (in MHHW) is 1.6 feet. Action stage begins at 1.2 feet. Moderate flooding starts at 2.5 feet, and major flooding at 3.7 feet.
How do I get alerts when Tide Station rises?
Download StormCast free on Google Play, go to River Gauges, and add Tide Station at St Augustine Municipal Marina (in MHHW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Tide Station at St Augustine Municipal Marina (in MHHW) gauge located?
The gauge is located in St. Johns County, Florida at coordinates 29.8914°N, 81.3097°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Courtesy of Hohonu
- 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.