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Horley water level

River gauge, River Mole, Surrey, United Kingdom

Directions

Normal for mid-October

Water level

0.35m Down 0.07 m over the last 24 hours

0 1 3 4 Highest onrecord 3.44 m Lowest on record 0.00 m

History

0.20.40.60.8mOct 10Oct 12Oct 14Oct 15Oct 17Bottom of normal range0.20.40.60.8mOct 10Oct 14Oct 17Bottom of normal range
0.20.40.60.8mSep 17Sep 25Oct 2Oct 10Oct 17Bottom of normal range0.20.40.60.8mSep 18Oct 2Oct 17Bottom of normal range
12mOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Top of normal rangeBottom of normal range12mOct 2025Apr 2026Oct 2026Top of normal rangeBottom of normal range
12mJanMarMayJulSepNov202612mJanAprJulOct2026

20252026

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

What this means

Water levels are unremarkable at Horley, where the gauge shows 0.35 m.

That puts it 0.04 m above the median of 0.32 m for mid-October, based on 21 years of readings. A year ago it stood at 0.28 m (+0.07 m).

It is still going down, by 0.07 m over the past 24 hours. The 30-day range is 0.19 m – 0.60 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
0.32 m0.04 m above the median for this date
Normal for this date
0.25 m – 0.76 m8 years in 10 fall in this range (21 years of records)
Normal range
0.19 m – 2.42 m
Same day last year
0.28 m+0.07 m
Lowest and highest in 30 days
0.19 m – 0.60 m
Lowest and highest in 12 months
0.22 m – 2.19 m
Highest on record
3.44 mDecember 24, 2013
Lowest on record
0.00 mDecember 7, 1989

For anglers and canoeists

This is an ordinary level for the river: most put-ins, beats and weirs behave as they usually do.

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

About the River Mole

River Mole

The River Mole is a tributary of the River Thames in southern England. It rises in West Sussex near Gatwick Airport and flows north-west through Surrey for 80 km to the Thames at Hampton Court Palace. The river gives its name to the Surrey district of Mole Valley.

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: 3.7 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 13° 6° 0.6 mm Wind 20 km/h
18 Sun 13° 6° 1.9 mm, 39% Wind 21 km/h
19 Mon 13° 8° 5.3 mm, 28% Wind 19 km/h
20 Tue 14° 10° 4.2 mm, 38% Wind 14 km/h
21 Wed 13° 8° 3.0 mm, 51% Wind 36 km/h
22 Thu 14° 7° 1.2 mm, 39% Wind 31 km/h
23 Fri 13° 7° 4.8 mm, 61% Wind 24 km/h

Forecast: Open-Meteo

Sunrise 07:28 AM Sunset 06:06 PM Daylight 10 hr, 38 min First quarter 42%

Map

Other gauges on the River Mole

Gauge Level Compared with normal 24 hours Distance
Kinnersley ManorRiver gauge, River Mole 0.15 m Normal −0.06 m 3.1 km
Gatwick AirportRiver gauge, River Mole 0.20 m Normal −0.08 m 3.4 km
Stafford BridgeRiver gauge, River Mole 0.62 m Low −0.04 m 5.2 km
DorkingRiver gauge, River Mole 0.12 m Normal +0.03 m 11 km
LeatherheadRiver gauge, River Mole 1.13 m Normal +0.04 m 17 km
Downside BridgeRiver gauge, River Mole 1.00 m Low +0.04 m 23 km
EsherRiver gauge, River Mole 1.44 m Normal +0.01 m 27 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Bonehurst BridgeRiver gauge, Burstow Stream 1.83 m Normal −0.05 m 2.0 km
Gatwick LinkRiver gauge, Gatwick Stream 0.11 m Normal −0.01 m 2.0 km
Peeks Brook LaneRiver gauge, Burstow Stream 0.93 m Normal −0.14 m 3.6 km
Salfords BridgeRiver gauge, Salfords Stream 0.35 m Normal −0.08 m 3.6 km
Three BridgesRiver gauge, Gatwick Stream 0.51 m Normal −0.01 m 6.5 km
IfieldRiver gauge, Ifield Brook 0.72 m Very low −0.09 m 7.0 km
MaidenbowerRiver gauge, Gatwick Stream 0.68 m Very low −0.01 m 7.4 km

Questions and answers

How does the River Mole at Horley compare with last year?

It is 0.07 m higher than on the same day last year, when the reading was 0.28 m.

What is a normal level for the River Mole at Horley in mid-October?

The median for mid-October is 0.32 m. In 8 years out of 10 the reading falls between 0.25 m and 0.76 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 0.35 m on the gauge does not mean the water is that deep.

What is the water level of Horley today?

On 17 Oct 2026, 18:45 BST, the water level was 0.35 m. Down 0.07 m over the last 24 hours.

Is Horley rising or falling?

Down 0.07 m over the last 24 hours. Up 0.02 m over the last 7 days.

Is the level of Horley normal?

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

What is the highest water level ever recorded at Horley?

The highest level on record is 3.44 m on December 24, 2013. The lowest is 0.00 m on December 7, 1989.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
Environment Agency
Station code
ea:3230TH (Agency page)
Coordinates
51.17392, -0.18323 (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 0.35 m 2026-10-17 17:45 Provisional

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How to cite

Environment Agency: Horley (ea:3230TH). Accessed October 17, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/surrey/horley

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