RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Itchen

Largest measured brown / sea trout: 65 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Itchen was 65 cm, recorded at Bishopstoke Barge on 3 September 2019.

Across 2,966 measured brown / sea trout, the median measured length was 11.4 cm.

Surveyors recorded weights for 320 brown / sea trout. The median was 0.8 oz (0.022 kg) and the largest recorded weight was 2 lb 3.2 oz (0.999 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 Itchen.

See brown / sea trout records across England →

Most recent observation5 September 2025Brambridge main "Kanara" · 4 fish
Largest measured brown / sea trout
65 cm
Median length
11.4 cm
Fish measured
2,966
Survey locations
42

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
65 cm3 Sept 2019Bishopstoke Barge155312
55 cm3 Sept 2019Bishopstoke Barge155312
51.9 cm20 Aug 2002Wolvesey Lodge55082
50.5 cm3 Sept 2019Bishopstoke Barge155312
49 cm30 Aug 2023Bishopstoke Barge163764
47.9 cm27 Oct 2003Railway78015
47.2 cm10 Oct 2007Abbott's Barton Upper117001
47 cm3 Sept 2019Bishopstoke Barge155312
45 cm20 Aug 2019Fulling Mill, Abbott's Worthy155232
45 cm12 Sept 2013Shawford Park138915

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
St Cross Mill "eel trap run"2 Sept 20245 Sept 20252
St Cross Mill7 Sept 20235 Sept 20253
St Cross Bridge15 Sept 20155 Sept 20259
Brambridge main "Kanara"6 Sept 20235 Sept 20255
Wolvesey Lodge20 Aug 20024 Sept 202510
Hockley Mill14 Sept 20094 Sept 202510
Swimming Pool, Winchester2 Sept 20023 Sept 202511
Shipley Bridge, Otterbourne11 Sept 20183 Sept 20258
Shawford, upstream of Norris's Bridge13 Sept 20183 Sept 20259
Lower Bishopstoke Fishery9 Sept 20193 Sept 20255
Caravan Pool, Highbridge24 Aug 20093 Sept 202510
Brambridge2 Sept 20153 Sept 20259
Toby Carvery Bishopstoke10 Sept 20182 Sept 20259
Lower Itchen Fishery - d/s viaduct2 Sept 20151 Sept 20257
Lower Itchen Fishery - Hut Run7 Sept 20231 Sept 20253
Bishopstoke Barge31 Aug 200429 Aug 202513
Shawford Park6 Oct 200828 Aug 202511
Fulling Mill, Abbott's Worthy12 Aug 200921 Aug 20259
Abbots Worthy, u/s Mill16 Oct 201819 Oct 20242
Abbott's Barton Chalk Straight17 Sept 202117 Sept 20211
Woodmill16 Sept 201916 Sept 20191
Abbots Worthy, Rochienne's d/s offtake24 Oct 201824 Oct 20181
Abbots Worthy, Rochienne's control24 Oct 201824 Oct 20181
Abbots Worthy, d/s M316 Oct 201816 Oct 20181
Avington15 Sept 201515 Sept 20151
Twyford Lodge18 Oct 201118 Oct 20111
Abbott's Barton, duck's nest spinney27 Sept 201027 Sept 20101
Abbott's Barton Upper10 Oct 200727 Sept 20102
St Cross Carrier18 Sept 200918 Sept 20091
Bishopstoke Lock5 Sept 20024 Sept 20095
Fallodon Stream17 Aug 200917 Aug 20091
Chilland House11 Aug 200911 Aug 20091
Abbots Barton Lower10 Oct 200710 Oct 20071
Railway25 Sept 200231 Aug 20054
Shawford, downtream of Norris's Bridge24 Sept 200224 Sept 20021
The Willow18 Sept 200218 Sept 20021
College, Winchester16 Sept 200216 Sept 20021
River Inn5 Sept 20025 Sept 20021
Blackbridge2 Sept 20022 Sept 20021
BR Lock15 Aug 200215 Aug 20021
Rickety19 Sept 200114 Aug 20022
Coneger Lock14 Aug 200214 Aug 20021

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

2001–2025

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 2,966 measured fish were spread across different length ranges.

Smallest
0.6 cm
Lower quarter
9 cm
Median
11.4 cm
Upper quarter
20.3 cm
Largest
65 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 320 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.003 kg)
Lower quarter
0.5 oz (0.014 kg)
Median
0.8 oz (0.022 kg)
Upper quarter
3.5 oz (0.0998 kg)
Heaviest
2 lb 3.2 oz (0.999 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 Itchen

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

Bullhead Minnow European eel Atlantic salmon Grayling Brook lamprey

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 →