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Staines Ash water level

River gauge, River Ash, Surrey, United Kingdom

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Right now

Very high for mid-October

Water level

0.10m Steady over the last 24 hours

0.0 0.3 0.5 Highest onrecord 0.37 m Lowest on record 0.02 m

History

History
0.040.060.080.10mOct 11Oct 12Oct 14Oct 16Oct 18Bottom of normal range0.040.060.080.10mOct 11Oct 14Oct 18Bottom of normal range
0.040.060.080.10mSep 18Sep 25Oct 3Oct 10Oct 18Bottom of normal range0.040.060.080.10mSep 18Oct 3Oct 18Bottom of normal range
0.040.060.080.10mOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Bottom of normal range0.040.060.080.10mOct 2025Apr 2026Oct 2026Bottom of normal range
0.030.050.080.10mJanMarMayJulSepNov20260.030.050.080.10mJanAprJulOct2026

20252026

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

What this means

High water at Staines Ash: the latest reading is 0.10 m, well above normal for mid-October.

The median for mid-October is 0.07 m, based on 21 years of readings, so the river level is 0.03 m above typical. On the same day last year the reading was 0.04 m, a difference of +0.06 m. The record high is 0.37 m, set on September 27, 1995.

It has barely moved over the past 24 hours. The 30-day range is 0.04 m – 0.11 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
0.07 m0.03 m above the median for this date
Normal for this date
0.04 m – 0.10 m8 years in 10 fall in this range (21 years of records)
Normal range
0.05 m – 0.50 m
Same day last year
0.04 m+0.06 m
Lowest and highest in 30 days
0.04 m – 0.11 m
Lowest and highest in 12 months
0.04 m – 0.10 m
Highest on record
0.37 mSeptember 27, 1995
Lowest on record
0.02 mOctober 10, 2009

High water: what to watch for

Fast water is stronger than it looks. Even shallow water across a road can move a car, and riverbanks can be undercut and give way without warning.

Upstream gauges on the same river usually show a rise first, which is a useful early warning.

About the River Ash

River Ash, Surrey

The River Ash is a small, shallow river in Surrey, England. Its course of 10 kilometres (6.2 mi) is just outside Greater London. Work has been carried out to re-align, clear and build up a small, Littleton head of water and create two backwaters. One backwater dates to the medieval period; the other to the 1990s. It flows as one of the six distributaries of the River Colne from the south of Staines Moor immediately south of the Staines Bypass eastwards through the rest of the borough of Spelthorne before meeting the River 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: 2.7 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 14° 8° 2.8 mm, 83% Wind 23 km/h
19 Mon 14° 10° 0.3 mm, 81% Wind 17 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 11° 4° – Wind 19 km/h

Forecast: Open-Meteo

Sunrise 07:31 AM Sunset 06:05 PM Daylight 10 hr, 34 min First quarter 46%

Map

Other gauges on the River Ash

Gauge Level Compared with normal 24 hours Distance
Knowle GreenRiver gauge, River Ash 0.51 m Normal ±0 1.5 km
MardockRiver gauge, River Ash 0.10 m Normal ±0 56 km
Little HadhamRiver gauge, River Ash 0.02 m Normal ±0 65 km
Furneux PelhamRiver gauge, River Ash 0.06 m Lowest on record −0.02 m 68 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Staines Trading EstateRiver gauge, River Colne 1.18 m Normal −0.01 m 0.4 km
Pound Mill, StainesRiver gauge, Wraysbury River 0.08 m Very low −0.01 m 0.5 km
StainesRiver gauge, River Thames 2.66 m Low −0.01 m 1.0 km
Hythe EndRiver gauge, Colne Brook 0.43 m Normal −0.01 m 1.6 km
Bell WeirRiver gauge, River Thames 0.25 m Very high ±0 1.8 km
Stanwell MillRiver gauge, River Colne 0.68 m Very high −0.01 m 3.0 km
Penton HookRiver gauge, River Thames 0.15 m Normal −0.01 m 3.0 km
Horton MillRiver gauge, Colne Brook 0.12 m Low −0.01 m 3.7 km

Questions and answers

Is the River Ash at Staines Ash higher than last year?

Yes, it is 0.06 m higher than on the same day last year, when the reading was 0.04 m.

What is a normal level for the River Ash at Staines Ash in mid-October?

The median for mid-October is 0.07 m. In 8 years out of 10 the reading falls between 0.04 m and 0.10 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 0.10 m on the gauge does not mean the water is that deep.

What is the water level of Staines Ash today?

On 18 Oct 2026, 04:30 BST, the water level was 0.10 m. Steady over the last 24 hours.

Is Staines Ash rising or falling?

Steady over the last 24 hours. Steady over the last 7 days.

Is the level of Staines Ash normal?

Very 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 Staines Ash?

The highest level on record is 0.37 m on September 27, 1995. The lowest is 0.02 m on October 10, 2009.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
Environment Agency
Station code
ea:3110TH (Agency page)
Coordinates
51.44038, -0.51204 (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 0.10 m 2026-10-18 03:30 Provisional

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How to cite

Environment Agency: Staines Ash (ea:3110TH). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/surrey/staines-ash

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.