Grand Lake St Marys near Celina OH water level

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

Lake, Grand Lake St Marys, Ohio, United States

Directions

Latest reading

Surface elevation

870.55ft Steady over the last 24 hours

Measured Oct 20, 2026, 03:15 PM EDT (29 min ago)

History

What this means

The U.S. Geological Survey reports Grand Lake St Marys near Celina OH at 870.55 ft. The agency publishes no normal range or warning level for this lake yet, so there is nothing to judge the number against.

The level has held steady over the past 24 hours. The 30-day range is 870.48 ft – 871.53 ft.

Over the past seven days the change adds up to −0.13 ft.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

Key numbers

Same day last year: 869.12 ft+1.43 ft
Lowest and highest in 30 days: 870.48 ft – 871.53 ft
Lowest and highest in 12 months: 868.59 ft – 871.68 ft

Boating and fishing at Grand Lake St Marys near Celina OH

Use the recent trend to judge conditions. A fast rise or fall shows up at docks and beaches within days.

Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.

Weather at the gauge

No rain in the last 3 days.

20 Tue 67° 37° – Wind 6 mph

21 Wed 66° 40° – Wind 7 mph

22 Thu 68° 39° – Wind 5 mph

23 Fri 68° 47° – Wind 6 mph

24 Sat 69° 48° – Wind 7 mph

25 Sun 71° 51° – Wind 11 mph

26 Mon 71° 54° – Wind 15 mph

Forecast: Open-Meteo

Sunrise 07:55 AM Sunset 06:52 PM Daylight 10 hr, 57 min Waxing gibbous 71%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Chickasaw Creek at St. Marys OHRiver gauge, Chickasaw Creek	0.8 cfs	Normal	+0.1 cfs	5.9 mi
St. Marys River at Rockford OHRiver gauge, St. Marys River	1.65 ft	Below flood stage	+0.01 ft	12 mi
Loramie Creek near Newport OHRiver gauge, Loramie Creek	19.7 cfs	Normal	−1.4 cfs	19 mi
St Marys River at Walcot Street at Willshire OHRiver gauge, St Marys River	38.0 cfs	Normal	±0	19 mi
St. Marys River at Pleasant MillsRiver gauge, St. Marys River	50.7 cfs	Normal	−1.9 cfs	22 mi
Wabash River at Linn GroveRiver gauge, Wabash River	4.94 ft	Below flood stage	−0.05 ft	25 mi
Salamonie River at PortlandRiver gauge, Salamonie River	2.17 ft	Below flood stage	±0	26 mi
Ottawa River at Lima OHRiver gauge, Ottawa River	3.4 cfs	Low	+1.3 cfs	27 mi

Questions and answers

How does Grand Lake St Marys near Celina OH compare with last year?

It is 1.43 ft higher than on the same day last year, when the reading was 869.12 ft.

Is Grand Lake St Marys near Celina OH really 870.55 ft deep?

No. 870.55 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Grand Lake St Marys near Celina OH today?

On Oct 20, 2026, 03:15 PM EDT, the surface elevation was 870.55 ft. Steady over the last 24 hours.

Is Grand Lake St Marys near Celina OH rising or falling?

Steady over the last 24 hours. Down 0.13 ft over the last 7 days.

Is the level of Grand Lake St Marys near Celina OH normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

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.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:403204084342601 (Agency page)
Coordinates: 40.53444, -84.57389 (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
Surface elevation	870.55 ft	2026-10-20 19:15	Provisional

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How to cite

U.S. Geological Survey: Grand Lake St Marys near Celina OH (usgs:403204084342601). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/ohio/grand-lake-st-marys-near-celina-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