River stage
Algonquin, Fox River
- River level
- 1.97 ft
- Status
- Below flood stage
- 7-day change
- +0.58 ft
- Recent high
- 2.04 ft
- Recent low
- 1.20 ft
Last reported 2026-10-13 | NWS ALGI2
- 30-day change
- +0.44 ft
- Average
- 1.62 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 4.50 ft
In brief
The Fox River at Algonquin, IL read 1.97 ft on Oct 13, 2026, 0.83 ft below action stage. That is 0.44 ft higher than 30 days earlier.
Source: National Weather Service gauge ALGI2
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 4.50 ft | 1916-04-01 |
| 2 | 4.42 ft | 1938-07-05 |
| 3 | 4.40 ft | 1918-03-06 |
| 4 | 4.39 ft | 2017-07-23 |
| 5 | 4.37 ft | 1929-03-16 |
| 6 | 4.16 ft | 1920-03-30 |
| 7 | 4.15 ft | 1921-05-01 |
| 8 | 4.03 ft | 2013-04-23 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 3.00 ft
Flooding begins to affect residences along River Road in Fox River Grove. Water inundates some streets in mobile home park in Northwest Elgin. Street flooding begins in Holiday Hills.
- 3.20 ft
Some homes are threatened by flooding in Richardson subdivision near Algonquin.
- 3.50 ft
Some homes flood in Valley View subdivision north of St Charles.
- 4.00 ft
Flooding affects residences in Algonquin along Lowe Drive.
- 6.00 ft
Algonquin Road (IL-62) is threatened west of the river in Algonquin.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Fox River flooding at Algonquin?
No. The Fox River at Algonquin is at 1.97 ft, 0.83 ft below action stage.
What is the flood stage at Algonquin?
The National Weather Service sets action stage 2.8 ft, minor flooding 3 ft, moderate flooding 3.3 ft and major flooding 4 ft.
What is the highest the Fox River has been at Algonquin?
The highest crest on record is 4.5 ft, on 1916-04-01.
Is the Fox River high or low right now at Algonquin?
At 1.97 ft it is higher than 96% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge ALGI2); daily history from the U.S. Geological Survey (site 05550000). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.