RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Wensum (upper)

Largest measured brown / sea trout: 53.3 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Wensum (upper) was 53.3 cm, recorded at Hellhoughton Common on 1 May 2007.

Across 5,820 measured brown / sea trout, the median measured length was 17 cm.

Surveyors recorded weights for 153 brown / sea trout. The median was 2.3 oz (0.066 kg) and the largest recorded weight was 8.8 oz (0.25 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 Wensum (upper).

See brown / sea trout records across England →

Most recent observation2 September 2025Upstream Fakenham Mill · 179 fish
Largest measured brown / sea trout
53.3 cm
Median length
17 cm
Fish measured
5,820
Survey locations
10

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
53.3 cm1 May 2007Hellhoughton Common105374
45.6 cm15 Mar 2017Tatterford Common150315
44.6 cm23 Oct 2009Upstream Fakenham Mill119788
43 cm27 Apr 2015Fakenham Common145066
42.3 cm14 Oct 2009Fakenham Common119378
41.5 cm19 Mar 1986Upstream Fakenham Mill17183
41.4 cm19 Mar 1986Upstream Fakenham Mill17183
41 cm1 May 1990Upstream Fakenham Mill17192
39.6 cm18 Apr 1994South Mill Farm17198
39.4 cm27 Apr 2015Fakenham Common145066

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
Upstream Fakenham Mill19 Mar 19862 Sept 202517
South Mill Farm26 Feb 198625 Apr 202513
Tatterford Common3 Mar 198622 Apr 202513
Upstream Broomsthorpe Bridge27 Feb 198615 Apr 202511
Hellhoughton Common6 Mar 198610 Apr 202517
Upstream Sculthorpe Mill11 Mar 19863 May 202413
Fakenham Common20 Mar 198614 Jun 201810
Downstream Doughton Bridge4 Mar 19863 Apr 19974
Upstream Raynham Bridge5 Mar 198626 Mar 19974
Sculthorpe Moor18 Mar 198618 Mar 19861

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

1986–2025

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 5,820 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
12.1 cm
Median
17 cm
Upper quarter
22 cm
Largest
53.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 153 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
1.2 oz (0.033 kg)
Median
2.3 oz (0.066 kg)
Upper quarter
3.5 oz (0.099 kg)
Heaviest
8.8 oz (0.25 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 Wensum (upper)

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

Stone loach Bullhead European eel 3-spined stickleback Brook lamprey 10-spined stickleback

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 →