Tide Station at St Augustine Municipal Marina (in MHHW)

1. 7.00 ftFlooding 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.
2. 5.00 ftWidespread 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
3. 4.00 ftConsiderable 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.
4. 3.70 ftIn 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.
5. 3.00 ftFlooding 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.
6. 2.50 ftRoad 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.
7. 2.00 ftFlooding 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.
8. 1.60 ftIn 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.

Most recent crests

• May 15, 2026: 1.68 ft
• October 12, 2025: 1.90 ft
• October 11, 2025: 3.00 ft
• October 10, 2025: 2.00 ft
• October 10, 2025: 2.97 ft
• October 9, 2025: 2.25 ft
• October 9, 2025: 2.16 ft
• October 8, 2025: 1.84 ft
• October 7, 2025: 1.83 ft
• October 6, 2025: 1.70 ft

• Mizell Outfall on Matanzas River (in MHHW)
• SR A1A
• Mickler
• Mickler
• Tolomato River at St. Augustine Airport (in MHHW)
• Guana River
• Atlantic Ocean
• Matanzas River

Forecasts by the Southeast River Forecast Center. Forecasts are not available. Only observed stages are available for this point. 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.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.