St. Marys River at Rockford OH water level

Name: St. Marys River at Rockford OH water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, St. Marys River, Ohio, United States

Directions

Below flood stage

Water level

1.66ft Steady over the last 24 hours

Measured Oct 19, 2026, 01:40 PM EDT (39 min ago)

Flow: 48.3 cfs

History

7 days

Water level Minor flood stage

What this means

The St. Marys River at Rockford OH is at 1.66 ft, in the normal range.

It is 11.34 ft below the flood stage of 13.00 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 1.62 ft and 1.68 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 14.68 ftJune 18, 2015

Floating and fishing near St. Marys River at Rockford OH

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 13.00 ft, 11.34 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

20.00 ft: Water floods several homes and businesses in the north and east sides of Rockford, primarily in the area of Bridge Street, as well as near East Street and locations along Route 33 east of town. High water extends further onto Route 118 north of Rockford near Route 117 and Route 127 at the St. Marys Bridge is closed.
16.00 ft: Water begins to flood some structures, primarily in the area of Route 33 and West Street, as well as near Route 33 and East Street on the southeast side of Rockford. In addition, Route 117 near Route 118 north of Rockford and Route 127 at the St. Marys Bridge are closed.
15.00 ft: Water nearly floods several homes and businesses, primarily in the area of Route 33 and West Street, as well as near Route 33 and East Street on the southeast side of Rockford. In addition, Route 117 near Route 118 north of Rockford and Route 127 at the St. Marys Bridge are closed.
14.70 ft: This stage is roughly the height of the FEMA 1 percent flood level. Backwater creek flooding rises onto property between West Bridge Street and North Streets.
14.00 ft: Several roads become flooded, with Route 127 at the St. Marys bridge closed due to high water. Water extends well onto property along the river, approaching some homes and businesses. No homes are flooded at this level.
13.00 ft: State Route 117 near Route 118 north of Rockford is water-covered and closed.
1.66 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Chance of at least minor flooding in October to December: 6 %.

Rank	Level	Date
1	14.68 ft	June 18, 2015
2	14.56 ft	February 8, 2008
3	14.25 ft	March 2, 2011
4	13.32 ft	April 28, 2019
5	13.28 ft	May 19, 2019
6	12.41 ft	March 4, 2007
7	10.58 ft	December 31, 2005

Weather at the gauge

Rain in the last 3 days: 0.11 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 53° 37° – Wind 15 mph

18 Sun 59° 35° – Wind 11 mph

19 Mon 65° 36° – Wind 7 mph

20 Tue 67° 46° – Wind 7 mph

21 Wed 66° 45° – Wind 6 mph

22 Thu 66° 45° – Wind 5 mph

23 Fri 68° 47° – Wind 6 mph

Forecast: Open-Meteo

Sunrise 07:55 AM Sunset 06:54 PM Daylight 10 hr, 59 min First quarter 61%

Map

Other gauges on the St. Marys River

Gauge	Level	Compared with normal	24 hours	Distance
St. Marys River at Pleasant MillsRiver gauge, St. Marys River	52.6 cfs	Normal	−1.2 cfs	12 mi
St. Marys River at DecaturRiver gauge, St. Marys River	3.29 ft	Below flood stage	−0.01 ft	19 mi
St. Marys River near Fort WayneRiver gauge, St. Marys River	1.16 ft	Below flood stage	−0.03 ft	32 mi
St. Marys River at Main St. at Fort WayneRiver gauge, St. Marys River	89.8 cfs	Normal	−10.0 cfs	38 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
St Marys River at Walcot Street at Willshire OHRiver gauge, St Marys River	38.0 cfs	Normal	±0	8 mi
Chickasaw Creek at St. Marys OHRiver gauge, Chickasaw Creek	0.7 cfs	Normal	+0.1 cfs	17 mi
Wabash River at Linn GroveRiver gauge, Wabash River	5.00 ft	Below flood stage	+0.02 ft	20 mi
Auglaize River near Fort Jennings OHRiver gauge, Auglaize River	2.01 ft	Below flood stage	±0	27 mi
Ottawa River at Lima OHRiver gauge, Ottawa River	2.1 cfs	Low	−1.3 cfs	27 mi
Salamonie River at PortlandRiver gauge, Salamonie River	2.16 ft	Below flood stage	±0	28 mi
Wabash River at BlufftonRiver gauge, Wabash River	1.84 ft	Below flood stage	+0.03 ft	28 mi
Ottawa River near Kalida OHRiver gauge, Ottawa River	4.26 ft	Below flood stage	−0.15 ft	30 mi

Questions and answers

What is flood stage for the St. Marys River at Rockford OH?

The official flood stage is 13.00 ft. The level is currently 11.34 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of St. Marys River at Rockford OH today?

On Oct 19, 2026, 01:40 PM EDT, the water level was 1.66 ft. Steady over the last 24 hours.

Is St. Marys River at Rockford OH rising or falling?

Steady over the last 24 hours.

Is the level of St. Marys River at Rockford OH normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at St. Marys River at Rockford OH?

The highest level on record is 14.68 ft on June 18, 2015.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:04180988 (Agency page)
Coordinates: 40.69477, -84.64663 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.66 ft	2026-10-19 17:40	Provisional
Flow	48.3 cfs	2026-10-19 17:40	Provisional

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How to cite

U.S. Geological Survey: St. Marys River at Rockford OH (usgs:04180988). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/ohio/st-marys-river-at-rockford-oh

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer