RiverFish

Roach · Rutilus rutilus

Roach in the Bristol Avon main river

Largest measured roach: 31.9 cm

The largest roach measured in Environment Agency surveys of the Bristol Avon main river was 31.9 cm, recorded at Chippenham (Te) on 23 August 2023.

Across 8,028 measured roach, the median measured length was 11 cm.

Surveyors recorded weights for 2,671 roach. The median was 0.7 oz (0.021 kg) and the largest recorded weight was 15.8 oz (0.449 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 roach records across England →

Most recent observation3 September 2024Chippenham (Te) · 56 fish
Largest measured roach
31.9 cm
Median length
11 cm
Fish measured
8,028
Survey locations
10

Individual EA measurements

Largest measured roach

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

LengthSurvey dateSurvey locationSurvey ID
31.9 cm23 Aug 2023Chippenham (Te)163049
29.7 cm26 May 1999u/s Kingsmead Mill22265
29 cm26 May 1999u/s Kingsmead Mill22265
28.1 cm29 Sept 2004Great Somerford (Te)82701
27.3 cm23 Jul 2003Rawlings Farm (Te)76415
27.3 cm26 May 1999u/s Kingsmead Mill22265
27.2 cm1 Sept 2010Chippenham (Te)123618
27 cm15 Sept 2005Chippenham (Te)86151
26.9 cm5 Jul 2006Great Somerford (Te)99929
26.9 cm29 Sept 2004Great Somerford (Te)82701

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

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
Chippenham (Te)9 Sept 20033 Sept 202415
Christian Malford (Te)19 May 199923 Aug 202312
Lacock (Te)20 Aug 200321 Aug 201913
Melksham16 Sept 201530 Aug 20173
Great Somerford (Te)28 Aug 200223 Aug 201713
Barton Country Park18 Sept 201418 Sept 20141
Rawlings Farm (Te)23 Jul 200312 Jul 20064
Cow Bridge27 May 199927 May 19991
u/s Kingsmead Mill26 May 199926 May 19991
d/s Malmesbury bypass20 May 199920 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 roach that year.

Fish measured by surveyors

Measured length distribution

See how the 8,028 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
8.4 cm
Median
11 cm
Upper quarter
14 cm
Largest
31.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 2,671 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
0.4 oz (0.01 kg)
Median
0.7 oz (0.021 kg)
Upper quarter
1.6 oz (0.044 kg)
Heaviest
15.8 oz (0.449 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.

Minnow Perch Chub Dace Pike European eel

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 →