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Denham Colne water level

River gauge, River Colne, Buckinghamshire, United Kingdom

Directions

Right now

Low for mid-October

Water level

0.14m Up 0.02 m over the last 24 hours

0.0 0.3 0.5 Highest onrecord 0.61 m Lowest on record 0.05 m

History

History
0.100.150.20mOct 12Oct 14Oct 15Oct 17Oct 19Bottom of normal range0.100.150.20mOct 12Oct 15Oct 19Bottom of normal range
0.100.150.20mSep 19Sep 26Oct 4Oct 11Oct 19Bottom of normal range0.100.150.20mSep 19Oct 4Oct 19Bottom of normal range
0.20.4mOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Top of normal rangeBottom of normal range0.20.4mOct 2025Apr 2026Oct 2026Top of normal rangeBottom of normal range
0.10.20.30.4mJanMarMayJulSepNov20260.10.20.30.4mJanAprJulOct2026

20252026

Water level Normal range (10–90 %) Top of normal rangeBottom of normal range

What this means

The River Colne at Denham Colne is running below normal at 0.14 m.

That puts it 0.02 m below the median of 0.16 m for mid-October, based on 21 years of readings. A year ago it stood at 0.15 m (−0.01 m).

It has risen 0.02 m over the past 24 hours. In the last month it has stayed between 0.09 m and 0.16 m.

Autumn rain usually starts to lift rivers again after the summer low.

Compared with 21 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
0.16 m0.02 m below the median for this date
Normal for this date
0.12 m – 0.21 m8 years in 10 fall in this range (21 years of records)
Normal range
0.11 m – 0.56 m
Same day last year
0.15 m−0.01 m
Lowest and highest in 30 days
0.09 m – 0.16 m
Lowest and highest in 12 months
0.12 m – 0.35 m
Highest on record
0.61 mFebruary 9, 2014
Lowest on record
0.05 mAugust 8, 2006

Fishing and paddling

At low levels, many rivers become a walk-and-paddle trip. Fish hold in deeper pools and spook easily.

Flood alerts and warnings come from the Environment Agency.

About the River Colne

River Colne, Hertfordshire

The Colne is a river and a tributary of the River Thames in England. Just over half its course is in south Hertfordshire. Downstream, it forms the boundary between Buckinghamshire and the London Borough of Hillingdon. The confluence with the River Thames is on the Staines reach at Staines-upon-Thames.

Read more on Wikipedia

Text and image from Wikipedia and Wikimedia Commons, licensed under CC BY-SA.

Weather at the gauge

Rain in the last 3 days: 2.1 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 13° 8° 0.5 mm, 91% Wind 25 km/h
19 Mon 14° 9° 5.2 mm, 91% Wind 18 km/h
20 Tue 13° 11° 12 mm, 65% Wind 11 km/h
21 Wed 14° 8° 3.6 mm, 47% Wind 25 km/h
22 Thu 14° 6° 1.8 mm, 76% Wind 14 km/h
23 Fri 11° 7° 38 mm, 77% Wind 34 km/h
24 Sat 10° 4° – Wind 21 km/h

Forecast: Open-Meteo

Sunrise 07:33 AM Sunset 06:02 PM Daylight 10 hr, 29 min First quarter 56%

Map

Other gauges on the River Colne

Gauge Level Compared with normal 24 hours Distance
WillowbankRiver gauge, River Colne 0.84 m Very low +0.02 m 0.8 km
Iver, Clisbys BridgeRiver gauge, River Colne 0.39 m Normal +0.05 m 4.1 km
Farlows BridgeRiver gauge, River Colne 0.33 m Low −0.01 m 5.4 km
Thorney Mill Road, West Drayton (Temporary)River gauge, River Colne 0.10 m Normal +0.06 m 7.2 km
West DraytonRiver gauge, River Colne 0.43 m Normal +0.02 m 7.3 km
Moor LaneRiver gauge, River Colne 7.46 m Normal +0.01 m 8.2 km
Stanwell MillRiver gauge, River Colne 0.70 m Very high +0.01 m 11 km
WatfordRiver gauge, River Colne 0.18 m Normal ±0 14 km
Staines Trading EstateRiver gauge, River Colne 1.18 m Normal ±0 14 km
London ColneyRiver gauge, River Colne 1.09 m Normal ±0 22 km
Great YeldhamRiver gauge, River Colne 0.18 m Normal +0.07 m 87 km
Poole StreetRiver gauge, River Colne 0.08 m Normal ±0 87 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Denham LodgeRiver gauge, River Misbourne 0.07 m Normal +0.01 m 0.5 km
Uxbridge, Fountains MillRiver gauge, Frays River 0.61 m Very low ±0 1.9 km
Ickenham, Swakeleys RoadRiver gauge, River Pinn 0.58 m Low +0.03 m 2.2 km
Uxbridge, Hercies RoadRiver gauge, River Pinn 0.76 m Normal +0.03 m 2.4 km
Howletts Lane, RuislipRiver gauge, Cannon Brook 0.07 m Normal +0.01 m 3.7 km
UxbridgeRiver gauge, River Pinn 0.05 m Low +0.02 m 3.7 km
RuislipRiver gauge, River Pinn 0.22 m Normal +0.07 m 4.3 km
Hillingdon, Gutteridge WoodRiver gauge, Yeading Brook 0.29 m High +0.07 m 4.9 km

Questions and answers

How does the River Colne at Denham Colne compare with last year?

It is 0.01 m lower than on the same day last year, when the reading was 0.15 m.

What is a normal level for the River Colne at Denham Colne in mid-October?

The median for mid-October is 0.16 m. In 8 years out of 10 the reading falls between 0.12 m and 0.21 m, based on 21 years of records.

Is the river level the same as the depth of the water?

No. The reading is measured from a fixed zero mark at the gauge, so 0.14 m on the gauge does not mean the water is that deep.

What is the water level of Denham Colne today?

On 19 Oct 2026, 06:30 BST, the water level was 0.14 m. Up 0.02 m over the last 24 hours.

Is Denham Colne rising or falling?

Up 0.02 m over the last 24 hours. Up 0.01 m over the last 7 days.

Is the level of Denham Colne normal?

Low for mid-October. Compared with 21 years of daily readings for this time of year.

What is the highest water level ever recorded at Denham Colne?

The highest level on record is 0.61 m on February 9, 2014. The lowest is 0.05 m on August 8, 2006.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
Environment Agency
Station code
ea:2870TH (Agency page)
Coordinates
51.56631, -0.48390 (WGS84)
Vertical datum
station datum
Update interval
every 15 minutes
Licence
Open Government Licence v3.0. Contains Environment Agency data licensed under the Open Government Licence v3.0

Published series

ParameterLast valueTime (UTC)Quality
Water level 0.14 m 2026-10-19 05:30 Provisional

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How to cite

Environment Agency: Denham Colne (ea:2870TH). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/buckinghamshire/denham-colne

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.