RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Uck

Largest measured brown / sea trout: 54.4 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Uck was 54.4 cm, recorded at Upstream Isfield Gate on 10 October 2019.

Across 909 measured brown / sea trout, the median measured length was 12.5 cm.

Surveyors recorded weights for 255 brown / sea trout. The median was 0.2 oz (0.007 kg) and the largest recorded weight was 4 lb 14.3 oz (2.22 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 Uck.

See brown / sea trout records across England →

Most recent observation14 August 2025Uckfield · 30 fish
Largest measured brown / sea trout
54.4 cm
Median length
12.5 cm
Fish measured
909
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
54.4 cm10 Oct 2019Upstream Isfield Gate155714
54 cm13 Sept 2019Uckfield155398
53 cm23 Aug 2002Isfield Weir63802
50.8 cm21 Sept 2017Uckfield151699
50.4 cm20 Aug 2015Uckfield146085
49.2 cm18 Aug 2021Uckfield160159
38.4 cm15 Sept 2005Owlsbury Farm87656
35.5 cm2 Sept 2004Owlsbury Farm81858
35 cm18 Aug 2021Uckfield160159
33 cm6 Aug 2007Isfield Weir106991

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
Uckfield20 Aug 201514 Aug 20257
Buxted Bridge20 Aug 200313 Aug 202512
Isfield Weir23 Aug 20027 Aug 20253
Upstream Isfield Gate10 Oct 201914 Jul 20232
Lephams Bridge21 Aug 201213 Sept 20182
Tickerage Castle21 Aug 201212 Sept 20183
Great Streele20 Aug 20035 Sept 20133
Hastingsford Bridge1 Sept 200330 Apr 20132
Owlsbury Farm2 Sept 200315 Sept 20053
Ridgewood Bridge3 Sept 20033 Sept 20031

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

2002–2025

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 909 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
6.8 cm
Median
12.5 cm
Upper quarter
17.3 cm
Largest
54.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 255 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
0.1 oz (0.003 kg)
Median
0.2 oz (0.007 kg)
Upper quarter
2.5 oz (0.072 kg)
Heaviest
4 lb 14.3 oz (2.22 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 Uck

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

Stone loach Minnow Roach Bullhead Gudgeon Chub

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 →