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St Johns River at Mill Cove (in MHHW)

Highest listed crest 2.45 ftFlood stage 1.6 ft8 crests since 2025

The St Johns River at Mill Cove (in MHHW) crested above flood stage 8 times among the 8 crests the National Weather Service lists from 2025 to 2026. The highest, 2.45 ft on October 10, 2025, was moderate flooding, 0.85 feet above flood stage.

The gauge

Highest listed crest
2.45 ft
October 10, 2025
Flood stage
1.6 ft
Major flooding from 3.1 ft
Crests at major
0
8 above flood stage
Most recent flood crest
October 7, 2026
2.10 ft, moderate flooding
Location
Duval County
Near Jacksonville (6.7 mi), Atlantic Beach (9.6 mi), Jacksonville Beach (12.0 mi)
Identifiers
NWS MCJF1
No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, St Johns River at Mill Cove (in MHHW)
Action stage1.10—The level at which the NWS or its partners begin to take action
Flood stage (minor)1.66Sep 27, 2026Minimal or no property damage, but possibly some public threat
Moderate flood stage2.12Oct 7, 2026Some inundation of structures and roads near the stream
Major flood stage3.10—Extensive inundation of structures and roads

Every listed crest

8 crests from 2025 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the St Johns River at Mill Cove (in MHHW), 2025 to 2026 1.522.533.5ft Flood stage 1.6 ftMajor 3.1 ft Sep 9, 2025: 2.00 ft, minor floodingSep 13, 2025: 1.88 ft, minor floodingOct 4, 2025: 2.08 ft, minor floodingOct 10, 2025: 2.45 ft, moderate floodingOct 16, 2025: 1.62 ft, minor floodingSep 8, 2026: 1.63 ft, minor floodingSep 27, 2026: 1.90 ft, minor floodingOct 7, 2026: 2.10 ft, moderate flooding Highest, 2.45 ft, Oct 10, 2025 202520302035
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, St Johns River at Mill Cove (in MHHW)
1Oct 10, 20252.45+0.85Moderate—
2Oct 7, 20262.10+0.50Moderate—
3Oct 4, 20252.08+0.48Minor—
4Sep 9, 20252.00+0.40Minor—
5Sep 27, 20261.90+0.30Minor—
6Sep 13, 20251.88+0.28Minor—
7Sep 8, 20261.63+0.03Minor—
8Oct 16, 20251.62+0.02Minor—

The worst floods along the St Johns River

For this gauge's highest crests, the other gauges on the St Johns River that crested above flood stage within a week.

October 7, 2026: 2.10 ft here, moderate flooding

Gauges on the St Johns River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the St Johns River
Mill Cove (in MHHW) this gaugeFL1.62.45 ft, Oct 10, 20250
Welaka (in MHHW)FL1.52.00 ft, Oct 10, 20260

Other gauges in Duval County

Flood gauges in Duval County
Atlantic Tide Station at Jacksonville Beach Pier (in MHHW)2.02.25 ft, Sep 24, 20260
Cedar Heights (in MHHW)1.72.29 ft, Oct 7, 20260
Biscayne Boulevard (in MHHW)1.76.89 ft, Sep 11, 20173
San Juan Ave Jacksonville (in MHHW)1.55.66 ft, Sep 11, 20174
Sheffield Road (in MHHW)1.53.47 ft, Sep 11, 20172
Dunn Creek Road (in MHHW)1.54.77 ft, Sep 11, 20172
Fort George State Park (in MHHW)2.02.86 ft, Oct 10, 20250
Fulton Mariners Point (in MHHW)1.62.64 ft, Oct 10, 20250
Old Saint Augustine Road (in MHHW)1.25.35 ft, Sep 11, 20173
St. Johns River Entrance (in MHHW)1.52.35 ft, Oct 11, 20250
Tisonia (in MHHW)1.34.52 ft, Sep 11, 20172
Argyle Forest Boulevard (in NAVD88)10.012.99 ft, Sep 11, 20172
Beach Boulevard (US 90) (in MHHW)1.74.76 ft, Sep 11, 20171
Jacksonville (in NAVD88)6.010.04 ft, Sep 11, 20171
Buckman Bridge (I-295) (in MHHW)1.55.20 ft, Sep 11, 20175
Dames Point Bridge (I-295) (in MHHW)1.63.67 ft, Sep 11, 20172
Dames Point Bridge (I-295) (in MHHW)1.63.67 ft, Sep 11, 20172
Jacksonville (in MHHW)1.56.00 ft, Oct 12, 18467
Main Street Bridge (in MHHW)1.56.00 ft, Oct 12, 18467
Mayport (in MHHW)1.83.41 ft, Nov 10, 20221
SR 115 near Callahan (in NAVD88)7.07.70 ft, Oct 11, 20260
Tiger Point (in MHHW)2.02.32 ft, Oct 10, 20250
Lem Turner Road (in MHHW)1.84.50 ft, Sep 11, 20172
Sherwood Forest (in MHHW)1.82.59 ft, Oct 11, 20250

Duval County: every hazard · River floods across the country · Florida

NOAA National Water Prediction Service, gauge MCJF1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.