RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the Bristol Avon main river

Largest measured brown / sea trout: 49.6 cm

The largest brown / sea trout measured in Environment Agency surveys of the Bristol Avon main river was 49.6 cm, recorded at Great Somerford (Te) on 28 August 2013.

Across 129 measured brown / sea trout, the median measured length was 28.8 cm.

Surveyors recorded weights for 17 brown / sea trout. The median was 1 lb 1.6 oz (0.499 kg) and the largest recorded weight was 2 lb 1.7 oz (0.955 kg).

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

See brown / sea trout records across England →

Most recent observation3 September 2024Chippenham (Te) · 1 fish
Largest measured brown / sea trout
49.6 cm
Median length
28.8 cm
Fish measured
129
Survey locations
6

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
49.6 cm28 Aug 2013Great Somerford (Te)138331
48.4 cm10 Sept 2014Great Somerford (Te)142611
47.5 cm19 Aug 2009Great Somerford (Te)118406
44 cm10 Sept 2019Chippenham (Te)155327
43 cm23 Aug 2017Great Somerford (Te)151351
42.8 cm23 Aug 2017Great Somerford (Te)151351
42 cm24 Aug 2016Great Somerford (Te)149047
41.4 cm29 Sept 2004Great Somerford (Te)82701
41 cm28 Aug 2013Great Somerford (Te)138331
40.7 cm29 Sept 2004Great Somerford (Te)82701

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
Chippenham (Te)1 Sept 20103 Sept 20245
Great Somerford (Te)28 Aug 200222 Aug 202313
Melksham30 Aug 201730 Aug 20171
Lacock (Te)13 Jul 200621 Jul 20113
Christian Malford (Te)2 Sept 20092 Sept 20091
u/s Kingsmead Mill26 May 199926 May 19991

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

1999–2024

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 129 measured fish were spread across different length ranges.

Smallest
6.4 cm
Lower quarter
16.7 cm
Median
28.8 cm
Upper quarter
36.5 cm
Largest
49.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 17 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.4 oz (0.01 kg)
Lower quarter
10.5 oz (0.297 kg)
Median
1 lb 1.6 oz (0.499 kg)
Upper quarter
1 lb 7.6 oz (0.67 kg)
Heaviest
2 lb 1.7 oz (0.955 kg)

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

More fish in this river

Explore the Bristol Avon main river

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

Roach Minnow Perch Chub Dace Pike

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 →