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Stanwell Mill water level

River gauge, River Colne, Surrey, United Kingdom

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Right now

High for mid-October

Water level

0.65m Steady over the last 24 hours

0.0 0.5 1.0 1.5 Highest onrecord 1.59 m Lowest on record 0.13 m

History

History
0.50.60.7mOct 10Oct 12Oct 14Oct 16Oct 170.50.60.7mOct 10Oct 14Oct 17
0.20.40.6mSep 17Sep 25Oct 2Oct 10Oct 17Bottom of normal range0.20.40.6mSep 17Oct 2Oct 17Bottom of normal range
0.51.0mOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Top of normal rangeBottom of normal range0.51.0mOct 2025Apr 2026Oct 2026Top of normal rangeBottom of normal range
0.40.6mJanMarMayJulSepNov20260.40.6mJanAprJulOct2026

20252026

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

What this means

The gauge at Stanwell Mill shows 0.65 m, above normal for mid-October.

That puts it 0.05 m above the median of 0.60 m for mid-October, based on 21 years of readings. A year ago it stood at 0.62 m (+0.03 m).

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 0.61 m and 0.69 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
0.60 m0.05 m above the median for this date
Normal for this date
0.51 m – 0.66 m8 years in 10 fall in this range (21 years of records)
Normal range
0.21 m – 1.12 m
Same day last year
0.62 m+0.03 m
Lowest and highest in 30 days
0.61 m – 0.69 m
Lowest and highest in 12 months
0.57 m – 0.74 m
Highest on record
1.59 mDecember 23, 1989
Lowest on record
0.13 mJuly 5, 2005

On the river at Stanwell Mill

High, coloured water is hard work for anglers and risky for canoeists, with stronger currents and debris around bridges and weirs.

Flood warnings for the area 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: 2.5 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 13° 7° 0.1 mm Wind 22 km/h
18 Sun 13° 7° 1.5 mm, 39% Wind 26 km/h
19 Mon 13° 9° 6.4 mm, 33% Wind 18 km/h
20 Tue 14° 11° 7.4 mm, 39% Wind 9 km/h
21 Wed 13° 8° 4.3 mm, 44% Wind 31 km/h
22 Thu 13° 7° 0.6 mm, 27% Wind 27 km/h
23 Fri 13° 8° 4.2 mm, 56% Wind 20 km/h

Forecast: Open-Meteo

Sunrise 07:29 AM Sunset 06:07 PM Daylight 10 hr, 37 min First quarter 42%

Map

Other gauges on the River Colne

Gauge Level Compared with normal 24 hours Distance
Staines Trading EstateRiver gauge, River Colne 1.19 m Normal ±0 3.3 km
Thorney Mill Road, West Drayton (Temporary)River gauge, River Colne −0.01 m Lowest on record −0.01 m 4.1 km
West DraytonRiver gauge, River Colne 0.40 m Very low −0.01 m 4.1 km
Farlows BridgeRiver gauge, River Colne 0.34 m Low −0.01 m 5.8 km
Iver, Clisbys BridgeRiver gauge, River Colne 0.34 m Normal −0.03 m 7.1 km
WillowbankRiver gauge, River Colne 0.84 m Very low ±0 10 km
Denham ColneRiver gauge, River Colne 0.14 m Normal ±0 11 km
Moor LaneRiver gauge, River Colne 7.46 m Normal +0.01 m 19 km
WatfordRiver gauge, River Colne 0.18 m Normal ±0 24 km
London ColneyRiver gauge, River Colne 1.09 m Normal ±0 32 km
Poole StreetRiver gauge, River Colne 0.07 m Normal ±0 95 km
Great YeldhamRiver gauge, River Colne 0.12 m Normal +0.02 m 95 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
PoyleRiver gauge, Poyle Channel 1.49 m Normal ±0 1.5 km
Horton MillRiver gauge, Colne Brook 0.12 m Low ±0 2.1 km
Staines AshRiver gauge, River Ash 0.10 m Very high ±0 3.0 km
Pound Mill, StainesRiver gauge, Wraysbury River 0.10 m Low ±0 3.5 km
Hythe EndRiver gauge, Colne Brook 0.44 m Normal −0.01 m 3.7 km
StainesRiver gauge, River Thames 2.66 m Low −0.01 m 3.9 km
Knowle GreenRiver gauge, River Ash 0.51 m Normal ±0 3.9 km
Bell WeirRiver gauge, River Thames 0.24 m Very high −0.01 m 4.0 km

Questions and answers

How does the River Colne at Stanwell Mill compare with last year?

It is 0.03 m higher than on the same day last year, when the reading was 0.62 m.

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

The median for mid-October is 0.60 m. In 8 years out of 10 the reading falls between 0.51 m and 0.66 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 0.65 m on the gauge does not mean the water is that deep.

What is the water level of Stanwell Mill today?

On 17 Oct 2026, 20:00 BST, the water level was 0.65 m. Steady over the last 24 hours.

Is Stanwell Mill rising or falling?

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

Is the level of Stanwell Mill normal?

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

What is the highest water level ever recorded at Stanwell Mill?

The highest level on record is 1.59 m on December 23, 1989. The lowest is 0.13 m on July 5, 2005.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
Environment Agency
Station code
ea:2893TH (Agency page)
Coordinates
51.46624, -0.50178 (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 0.65 m 2026-10-17 19:00 Provisional

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How to cite

Environment Agency: Stanwell Mill (ea:2893TH). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/surrey/stanwell-mill

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.