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Pen Mill water level

River gauge, River Yeo, Somerset, United Kingdom

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Right now

Very low for mid-October

Water level

0.11m Steady over the last 24 hours

0 3 5 Highest onrecord 4.57 m Lowest on record 0.00 m

History

History
0.20.40.6mOct 16Oct 16Oct 17Oct 17Oct 18Bottom of normal range0.20.40.6mOct 16Oct 17Oct 18Bottom of normal range
-0123mOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Top of normal rangeBottom of normal range-0123mOct 2025Apr 2026Oct 2026Top of normal rangeBottom of normal range
-012mJanMarMayJulSepNov2026-012mJanAprJulOct2026

20252026

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

What this means

At 0.11 m, the River Yeo at Pen Mill is far below normal for mid-October.

The median for mid-October is 0.19 m, based on 21 years of readings, so the river level is 0.08 m below typical. On the same day last year the reading was 0.13 m, a difference of −0.02 m. The lowest reading on record is 0.00 m (March 16, 1990).

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 0.10 m and 0.12 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
0.19 m0.08 m below the median for this date
Normal for this date
0.12 m – 0.63 m8 years in 10 fall in this range (21 years of records)
Normal range
0.12 m – 3.10 m
Same day last year
0.13 m−0.02 m
Lowest and highest in 30 days
0.10 m – 0.12 m
Lowest and highest in 12 months
0.11 m – 2.36 m
Highest on record
4.57 mDecember 28, 1979
Lowest on record
0.00 mMarch 16, 1990

On the river at Pen Mill

Low, clear water makes fish wary, and anglers often do better early and late in the day. For canoeists, shallow riffles mean scraped hulls and the odd portage.

Flood warnings for the area come from the Environment Agency.

About the River Yeo

River Yeo (South Somerset)

The River Yeo, also known as the River Ivel, is a tributary of the River Parrett in north Dorset and south Somerset, England.

Read more on Wikipedia

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

Weather at the gauge

The forecast is not available right now.

Sunrise 07:39 AM Sunset 06:14 PM Daylight 10 hr, 35 min First quarter 46%

Map

Other gauges on the River Yeo

Gauge Level Compared with normal 24 hours Distance
Sherborne LakeRiver gauge, River Yeo −0.78 m No reference yet −0.01 m 7.4 km
IlchesterRiver gauge, River Yeo 0.08 m Normal −0.01 m 8.5 km
Huish Episcopi Pumping StationRiver gauge, River Yeo 1.67 m Normal −0.01 m 17 km
YeofordRiver gauge, River Yeo 0.18 m Normal ±0 80 km
LapfordRiver gauge, River Yeo 0.36 m Very low ±0 85 km
Collard BridgeRiver gauge, River Yeo 0.39 m Normal +0.01 m 100 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
ChetnoleRiver gauge, River Wriggle 0.11 m Normal ±0 8.3 km
Weston BampfyldeRiver gauge, River Cam −0.01 m Lowest on record ±0 9.4 km
ChiselboroughRiver gauge, River Parrett 0.05 m Normal ±0 11 km
Long LoadRiver gauge, Witcombe Bottom Main Drain 7.40 m Very high +0.01 m 13 km
Gaw BridgeRiver gauge, River Parrett 0.24 m Normal ±0 13 km
LovingtonRiver gauge, River Brue 0.07 m Very low ±0 16 km
Huish Episcopi Pumping StationRiver gauge, Longload Main Drain 1.29 m Normal +0.02 m 17 km
HookeRiver gauge, River Hooke 0.12 m Very low ±0 17 km

Questions and answers

Is the River Yeo at Pen Mill higher than last year?

No, it is 0.02 m lower than on the same day last year, when the reading was 0.13 m.

What is a normal level for the River Yeo at Pen Mill in mid-October?

The median for mid-October is 0.19 m. In 8 years out of 10 the reading falls between 0.12 m and 0.63 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 0.11 m on the gauge does not mean the water is that deep.

What is the water level of Pen Mill today?

On 18 Oct 2026, 03:45 BST, the water level was 0.11 m. Steady over the last 24 hours.

Is Pen Mill rising or falling?

Steady over the last 24 hours.

Is the level of Pen Mill normal?

Very 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 Pen Mill?

The highest level on record is 4.57 m on December 28, 1979. The lowest is 0.00 m on March 16, 1990.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
Environment Agency
Station code
ea:52117 (Agency page)
Coordinates
50.94350, -2.60865 (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 0.11 m 2026-10-18 02:45 Provisional

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How to cite

Environment Agency: Pen Mill (ea:52117). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/somerset/pen-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.