River stage
Marseilles, Illinois River
- River level
- 11.73 ft
- Status
- Below flood stage
- 7-day change
- -1.37 ft
- Recent high
- 17.84 ft
- Recent low
- 11.18 ft
Last reported 2026-10-13 | NWS MRSI2
- 30-day change
- +0.50 ft
- Average
- 13.29 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 35.40 ft
In brief
The Illinois River at Marseilles, IL read 11.73 ft on Oct 13, 2026, 5.27 ft below action stage. That is 0.50 ft higher than 30 days earlier.
Source: National Weather Service gauge MRSI2
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 35.40 ft | 1916-01-21 |
| 2 | 28.32 ft | 2020-05-19 |
| 3 | 28.27 ft | 2013-04-19 |
| 4 | 28.13 ft | 2008-09-16 |
| 5 | 27.02 ft | 2018-02-22 |
| 6 | 26.85 ft | 1997-02-22 |
| 7 | 26.78 ft | 1982-12-04 |
| 8 | 26.53 ft | 2019-05-02 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 17.00 ft
Water overflows low-lying banks just south of the river.
- 25.00 ft
Residences are threatened near the river in Marseilles.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Illinois River flooding at Marseilles?
No. The Illinois River at Marseilles is at 11.73 ft, 5.27 ft below action stage.
What is the flood stage at Marseilles?
Action stage 17 ft is the first threshold.
What is the highest the Illinois River has been at Marseilles?
The highest crest on record is 35.4 ft, on 1916-01-21.
Is the Illinois River high or low right now at Marseilles?
At 11.73 ft it is higher than 17% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge MRSI2); daily history from the U.S. Geological Survey (site 05543500). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.