Illinois River at Marseilles water level
River gauge, Illinois River, Illinois, United States
Right now
Normal for mid-October
Water level
- Flow
- 5,610 cfs
History
20252026
What this means
The gauge at Illinois River at Marseilles reads 11.68 ft, a normal level for mid-October.
The median for mid-October is 10.92 ft, based on 32 years of readings, so the river stage is 0.76 ft above typical. On the same day last year the reading was 11.23 ft, a difference of +0.45 ft.
The water is rising: up 0.42 ft over the past 24 hours. Over the past 30 days it has moved between 11.24 ft and 15.11 ft.
Fall is often low-water season on rivers, until steadier rain returns.
Compared with 32 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 10.92 ft0.76 ft above the median for this date
- Normal for this date
- 1.17 ft – 12.98 ft8 years in 10 fall in this range (32 years of records)
- Same day last year
- 11.23 ft+0.45 ft
- Lowest and highest in 30 days
- 11.24 ft – 15.11 ft
- Lowest and highest in 12 months
- 10.99 ft – 18.81 ft
- Highest on record
- 35.40 ftJanuary 21, 1916
What the stage means on the water
A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.
What happens at each level
- 25.00 ft
- Residences are threatened near the river in Marseilles.
- 17.00 ft
- Water overflows low-lying banks just south of the river.
- 11.68 ft
- Right now
Impact statements from the U.S. National Weather Service.
Highest crests on record
| Rank | Level | Date |
|---|---|---|
| 1 | 35.40 ft | January 21, 1916 |
| 2 | 28.32 ft | May 19, 2020 |
| 3 | 28.27 ft | April 19, 2013 |
| 4 | 28.13 ft | September 16, 2008 |
| 5 | 27.02 ft | February 22, 2018 |
| 6 | 26.85 ft | February 22, 1997 |
| 7 | 26.78 ft | December 4, 1982 |
| 8 | 26.53 ft | May 2, 2019 |
| 9 | 26.02 ft | March 11, 2009 |
| 10 | 25.79 ft | November 29, 1990 |
Weather at the gauge
Rain in the last 3 days: 0.13 in. Rain that falls upstream can take hours or days to show up at a river gauge.
Forecast: Open-Meteo
Map
Other gauges on the Illinois River
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Illinois River at MorrisRiver gauge, Illinois River | 5.18 ft | Normal | +0.34 ft | 15 mi |
| Illinois River at SenecaRiver gauge, Illinois River | 20.47 ft | Low | +0.09 ft | 5.7 mi |
| Illinois River at HenryRiver gauge, Illinois River | 15.39 ft | Normal | +0.07 ft | 37 mi |
| Illinois River at Kingston MinesRiver gauge, Illinois River | 5.54 ft | Normal | −0.72 ft | 77 mi |
| Illinois River at Copperas CreekRiver gauge, Illinois River | 5.12 ft | Normal | −0.62 ft | 85 mi |
| Illinois River at MeredosiaRiver gauge, Illinois River | 5.43 ft | Normal | +0.43 ft | 142 mi |
| Illinois River at Valley CityRiver gauge, Illinois River | 4.64 ft | Normal | +0.57 ft | 151 mi |
| Illinois River at FlorenceRiver gauge, Illinois River | 17.40 ft | Normal | +0.55 ft | 154 mi |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Fox River at DaytonRiver gauge, Fox River | 7.44 ft | High | −0.09 ft | 5.4 mi |
| Vermilion River near LeonoreRiver gauge, Vermilion River | 3.63 ft | Normal | −0.04 ft | 14 mi |
| Mazon River near Coal CityRiver gauge, Mazon River | 1.49 ft | Normal | −0.04 ft | 19 mi |
| Aux Sable Creek near MorrisRiver gauge, Aux Sable Creek | 3.76 ft | Normal | −0.25 ft | 20 mi |
| Kankakee River at Inflow of Power Plant near LorenzoRiver gauge, Kankakee River | 504.57 ft | Very low | −0.05 ft | 24 mi |
| Fox River Tailwater at YorkvilleRiver gauge, Fox River Tailwater | 7.54 ft | Normal | −0.09 ft | 26 mi |
| Fox River Bypass at YorkvilleRiver gauge, Fox River Bypass | 9.27 ft | Normal | −0.07 ft | 26 mi |
| Fox River at YorkvilleRiver gauge, Fox River | 13.00 ft | Normal | −0.04 ft | 26 mi |
Questions and answers
Is the Illinois River at Marseilles higher than last year?
Yes, it is 0.45 ft higher than on the same day last year, when the reading was 11.23 ft.
What is a normal level for the Illinois River at Marseilles in mid-October?
The median for mid-October is 10.92 ft. In 8 years out of 10 the reading falls between 1.17 ft and 12.98 ft, based on 32 years of records.
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 Illinois River at Marseilles today?
On Oct 18, 2026, 04:45 PM CDT, the water level was 11.68 ft. Up 0.42 ft over the last 24 hours.
Is Illinois River at Marseilles rising or falling?
Up 0.42 ft over the last 24 hours. Down 0.27 ft over the last 7 days.
Is the level of Illinois River at Marseilles normal?
Normal for mid-October. Compared with 32 years of daily readings for this time of year.
What is the highest water level ever recorded at Illinois River at Marseilles?
The highest level on record is 35.40 ft on January 21, 1916.
For specialists
Station codes, datum, parameters, data quality and downloads
- Operator
- U.S. Geological Survey
- Station code
usgs:05543500(Agency page)- Coordinates
41.32700, -88.71708(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 | 11.68 ft | 2026-10-18 21:45 | Provisional |
| Flow | 5,610 cfs | 2026-10-18 21:45 | Provisional |
Download
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How to cite
U.S. Geological Survey: Illinois River at Marseilles (usgs:05543500). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/illinois/illinois-river-at-marseilles
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