RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Wandle

Largest measured brown / sea trout: 53 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Wandle was 53 cm, recorded at Watermeads Lane on 23 June 2015.

Across 526 measured brown / sea trout, the median measured length was 13.4 cm.

Surveyors recorded weights for 10 brown / sea trout. The median was 5.4 oz (0.1535 kg) and the largest recorded weight was 1 lb 10.9 oz (0.764 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Wandle.

See brown / sea trout records across England →

Most recent observation8 October 2025Watermeads Lane · 14 fish
Largest measured brown / sea trout
53 cm
Median length
13.4 cm
Fish measured
526
Survey locations
12

Individual EA measurements

Largest measured brown / sea trout

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
53 cm23 Jun 2015Watermeads Lane145180
52 cm13 Jul 2017Mapleton Road150871
51.6 cm23 Jun 2015Watermeads Lane145180
49.3 cm22 Oct 2008Corbet Close116184
48 cm8 Oct 2025Watermeads Lane179734
46.8 cm10 Jun 2009Hackbridge117566
46.5 cm23 Jun 2015Watermeads Lane145180
45.6 cm23 Jun 2015Watermeads Lane145180
45 cm1 Jul 2021Butterhill160153
44 cm22 Oct 2008Corbet Close116184

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where brown / sea trout were found

Each point marks a survey location with at least one brown / sea trout record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding brown / sea trout
Watermeads Lane17 Jun 20098 Oct 20256
Hackbridge30 May 20078 Oct 202511
Butterhill21 Jun 19892 Oct 202510
Ravensbury Park22 Jul 198830 Sept 20252
Upstream Millpond Place Bridge Investigation Site 14 Jul 20194 Jul 20191
Papermill Close (Mill Lane) Invest.igation Site 34 Jul 20194 Jul 20191
Mill Lane u/s Butterhill Brid Investigation Site 24 Jul 20194 Jul 20191
Mapleton Road18 Jun 200913 Jul 20173
Phipps Bridge5 Jun 20135 Jun 20131
Sainsburys Merton8 Jun 20118 Jun 20111
Corbet Close22 Oct 200822 Oct 20081
Goat Bridge, Beddington22 Jul 198822 Jul 19881

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1988–2025

Survey records by year

Each bar shows how many survey visits recorded brown / sea trout that year.

Fish measured by surveyors

Measured length distribution

See how the 526 measured fish were spread across different length ranges.

Smallest
4.2 cm
Lower quarter
9.9 cm
Median
13.4 cm
Upper quarter
24.2 cm
Largest
53 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 10 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
1.6 oz (0.044 kg)
Lower quarter
2.9 oz (0.0822 kg)
Median
5.4 oz (0.1535 kg)
Upper quarter
7.2 oz (0.2055 kg)
Heaviest
1 lb 10.9 oz (0.764 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Wandle

Compare other species with enough survey and measurement data for a detailed page.

3-spined stickleback Stone loach European eel Chub Roach Dace

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →