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Fox River at Algonquin water level

River gauge, Fox River, Illinois, United States

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Right now

High for mid-October

Water level

1.77ft Up 0.07 ft over the last 24 hours

1 3 4 Highest onrecord 4.50 ft Minor floodstage 3.00 ft

History

History
123ftOct 11Oct 12Oct 14Oct 15Oct 17Minor flood stage123ftOct 11Oct 14Oct 17Minor flood stage
123ftSep 18Sep 25Oct 2Oct 10Oct 17Minor flood stage123ftSep 18Oct 2Oct 17Minor flood stage
-0123ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Minor flood stage-0123ftOct 2025Apr 2026Oct 2026Minor flood stage
-0123ftJanMarMayJulSepNov2026-0123ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

The Fox River at Algonquin is above normal at 1.77 ft.

That puts it 0.30 ft above the median of 1.48 ft for mid-October, based on 38 years of readings. It is 1.23 ft below the flood stage of 3.00 ft. A year ago it stood at 1.39 ft (+0.38 ft).

It has risen 0.07 ft over the past 24 hours. If the rise continues, low-lying paths and riverside parking can go under water. In the last month it has stayed between 1.29 ft and 1.98 ft.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 38 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
1.48 ft0.30 ft above the median for this date
Normal for this date
1.18 ft – 2.03 ft8 years in 10 fall in this range (38 years of records)
Same day last year
1.39 ft+0.38 ft
Lowest and highest in 30 days
1.29 ft – 1.98 ft
Lowest and highest in 12 months
1.17 ft – 3.52 ft
Highest on record
4.50 ftApril 1, 1916

Floating and fishing near Fox River at Algonquin

Experienced paddlers may enjoy higher water, but many outfitters stop rentals once a river runs this high.

Flood stage here is 3.00 ft, 1.23 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

6.00 ft
Algonquin Road (IL-62) is threatened west of the river in Algonquin.
4.00 ft
Flooding affects residences in Algonquin along Lowe Drive.
3.50 ft
Some homes flood in Valley View subdivision north of St Charles.
3.20 ft
Some homes are threatened by flooding in Richardson subdivision near Algonquin.
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.
1.77 ft
Right now

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

Highest crests on record

RankLevelDate
14.50 ftApril 1, 1916
24.42 ftJuly 5, 1938
34.40 ftMarch 6, 1918
44.39 ftJuly 23, 2017
54.37 ftMarch 16, 1929
64.16 ftMarch 30, 1920
74.15 ftMay 1, 1921
84.03 ftApril 23, 2013
94.01 ftApril 6, 1960
104.01 ftMarch 12, 1974

Weather at the gauge

Rain in the last 3 days: 0.31 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 52° 35° – Wind 10 mph
18 Sun 58° 38° – Wind 14 mph
19 Mon 63° 43° – Wind 8 mph
20 Tue 65° 46° – Wind 5 mph
21 Wed 65° 48° – Wind 8 mph
22 Thu 65° 52° – Wind 6 mph
23 Fri 68° 51° – Wind 9 mph

Forecast: Open-Meteo

Sunrise 07:09 AM Sunset 06:10 PM Daylight 11 hr, 1 min First quarter 40%

Map

Other gauges on the Fox River

Gauge Level Compared with normal 24 hours Distance
Fox River at PrincetonRiver gauge, Fox River 5.11 ft Below flood stage −0.01 ft 124 mi
Fox River at WaukeshaRiver gauge, Fox River 3.24 ft Below flood stage −0.04 ft 58 mi
Fox River at Waterford Dam, at WaterfordRiver gauge, Fox River 1.62 ft Low −0.02 ft 42 mi
Fox River at RochesterRiver gauge, Fox River 4.32 ft Normal −0.10 ft 40 mi
Fox River near New MunsterRiver gauge, Fox River 7.10 ft Below flood stage +0.27 ft 31 mi
Fox River at JohnsburgRiver gauge, Fox River 4.08 ft Normal +0.02 ft 15 mi
Fox River near McHenryRiver gauge, Fox River 3.96 ft Normal −0.07 ft 10 mi
Fox River at South ElginRiver gauge, Fox River 12.86 ft Normal +0.06 ft 12 mi
Fox River at South Elgin, Il (Tailwater)River gauge, Fox River 6.86 ft Normal ±0 12 mi
Fox River at MontgomeryRiver gauge, Fox River 11.79 ft Normal −0.08 ft 30 mi
Fox River at YorkvilleRiver gauge, Fox River 13.01 ft Normal −0.12 ft 37 mi
Fox River at DaytonRiver gauge, Fox River 7.73 ft High +0.41 ft 60 mi

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Fox River (Tailwater) at AlgonquinRiver gauge, Fox River (Tailwater) 6.63 ft Normal +0.28 ft 0.4 mi
Tyler Creek at ElginRiver gauge, Tyler Creek 5.83 ft High −0.01 ft 7 mi
Poplar Creek at ElginRiver gauge, Poplar Creek 1.45 ft Normal −0.06 ft 10 mi
Fox River (Tailwater) near McHenryRiver gauge, Fox River (Tailwater) 2.10 ft Normal +0.24 ft 10 mi
Boone Creek near Mc HenryRiver gauge, Boone Creek 1.21 ft Below flood stage −0.07 ft 11 mi
Nippersink Creek above Wonder LakeRiver gauge, Nippersink Creek 5.26 ft Normal −0.03 ft 16 mi

Questions and answers

How does the Fox River at Algonquin compare with last year?

It is 0.38 ft higher than on the same day last year, when the reading was 1.39 ft.

What is flood stage for the Fox River at Algonquin?

The official flood stage is 3.00 ft. The level is currently 1.23 ft below it.

What is a normal level for the Fox River at Algonquin in mid-October?

The median for mid-October is 1.48 ft. In 8 years out of 10 the reading falls between 1.18 ft and 2.03 ft, based on 38 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 Fox River at Algonquin today?

On Oct 17, 2026, 05:45 AM CDT, the water level was 1.77 ft. Up 0.07 ft over the last 24 hours.

Is Fox River at Algonquin rising or falling?

Up 0.07 ft over the last 24 hours. Steady over the last 7 days.

Is the level of Fox River at Algonquin normal?

High for mid-October. Compared with 38 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:05550000 (Agency page)
Coordinates
42.16631, -88.29033 (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

ParameterLast valueTime (UTC)Quality
Water level 1.77 ft 2026-10-17 10:45 Provisional

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How to cite

U.S. Geological Survey: Fox River at Algonquin (usgs:05550000). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-states/illinois/fox-river-at-algonquin

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.