Horton Mill water level

Name: Horton Mill water level (Environment Agency)
Creator: Environment Agency
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/

River gauge, Colne Brook, Berkshire, United Kingdom

Directions

Below the normal range

Water level

0.10m Steady over the last 24 hours

Measured 18 Oct 2026, 21:30 BST (35 min ago)

History

7 days

Water level Top of normal rangeBottom of normal range

What this means

Low water at Horton Mill: the gauge reads 0.10 m, below normal.

The usual range here runs from 0.12 m to 0.42 m.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. The 30-day range is 0.10 m – 0.13 m.

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

Compared with the normal range the agency publishes for this gauge. How to read levels

Key numbers

Normal range: 0.12 m – 0.42 m
Highest on record: 0.48 mJanuary 30, 2021
Lowest on record: 0.08 mSeptember 21, 2019

For anglers and canoeists

Low rivers are hard going for paddlers, with exposed gravel and weirs that are awkward to shoot. Salmon and sea trout usually wait for the next spate to run.

Many angling and canoe clubs check gauges like this one before heading out.

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.

18 Sun 14° 8° 2.9 mm, 83% Wind 23 km/h

19 Mon 14° 10° 0.4 mm, 81% Wind 18 km/h

20 Tue 13° 11° 11 mm, 63% Wind 8 km/h

21 Wed 14° 8° 3.3 mm, 44% Wind 25 km/h

22 Thu 14° 6° 2.0 mm, 53% Wind 14 km/h

23 Fri 11° 8° 38 mm, 78% Wind 32 km/h

24 Sat 10° 4° – Wind 19 km/h

Forecast: Open-Meteo

Sunrise 07:31 AM Sunset 06:05 PM Daylight 10 hr, 33 min First quarter 53%

Map

Other gauges on Colne Brook

Gauge	Level	Compared with normal	24 hours	Distance
Hythe EndRiver gauge, Colne Brook	0.45 m	Normal	+0.01 m	3.5 km

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
PoyleRiver gauge, Poyle Channel	1.49 m	Normal	±0	1.3 km
Stanwell MillRiver gauge, River Colne	0.64 m	High	±0	2.1 km
Old Windsor LockRiver gauge, River Thames	0.25 m	Very high	+0.01 m	2.8 km
Staines AshRiver gauge, River Ash	0.10 m	Very high	±0	3.7 km
Bell WeirRiver gauge, River Thames	0.26 m	Very high	+0.02 m	3.8 km
Staines Trading EstateRiver gauge, River Colne	1.18 m	Normal	±0	4.1 km
Pound Mill, StainesRiver gauge, Wraysbury River	0.09 m	Low	±0	4.1 km
Windsor ParkRiver gauge, River Thames	3.31 m	Normal	+0.01 m	4.3 km

Questions and answers

What is the typical range for Colne Brook at Horton Mill?

The Environment Agency gives a typical range of 0.12 m to 0.42 m for this gauge.

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 0.10 m on the gauge does not mean the water is that deep.

What is the water level of Horton Mill today?

On 18 Oct 2026, 21:30 BST, the water level was 0.10 m. Steady over the last 24 hours.

Is Horton Mill rising or falling?

Steady over the last 24 hours.

Is the level of Horton Mill normal?

Below the normal range. Compared with the normal range the agency publishes for this gauge.

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

The highest level on record is 0.48 m on January 30, 2021. The lowest is 0.08 m on September 21, 2019.

How often is this data updated?

The Environment Agency publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: Environment Agency
Station code: ea:2897BTH (Agency page)
Coordinates: 51.47174, -0.53123 (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

Parameter	Last value	Time (UTC)	Quality
Surface elevation	–	–	–
Water level	0.10 m	2026-10-18 20:30	Provisional

Download

Embed this gauge

Add a live card for this gauge to your website. It updates on its own and links back here.

<iframe src="https://nivelmap.com/embed/3262?lang=en" width="360" height="230" style="border:0;max-width:100%" loading="lazy" title="Horton Mill water level"></iframe>

How to cite

Environment Agency: Horton Mill (ea:2897BTH). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/berkshire/horton-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.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer