Perch · Perca fluviatilis

Perch in the River Lee

Largest measured perch: 39.2 cm

The largest perch measured in Environment Agency surveys of the River Lee was 39.2 cm, recorded at Kings Weir on 2 June 2015.

Across 2,123 measured perch, the median measured length was 11.3 cm.

Surveyors recorded weights for 3 perch. The median was 3.6 oz (0.101 kg) and the largest recorded weight was 6.7 oz (0.19 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 Lee.

See perch records across England →

Most recent observation23 July 2026Amwell Loop · 89 fish

Largest measured perch: 39.2 cm
Median length: 11.3 cm
Fish measured: 2,123
Survey locations: 28

Individual EA measurements

Largest measured perch

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

Length	Survey date	Survey location	Survey ID
39.2 cm	2 Jun 2015	Kings Weir	144824
38.9 cm	14 Sept 2005	Woolmers Park	86437
37.5 cm	6 Aug 2009	Waterdale	118308
37.2 cm	20 Jun 2013	Hyde Mill	137219
36.8 cm	2 Jul 2013	Hartham Common	136902
36.7 cm	1 Aug 2019	Waterdale	155085
36.1 cm	21 Jun 2018	Hartham Common	152721
35.7 cm	5 Aug 2010	Waterdale	123253
35.5 cm	31 Jul 2007	Waterdale	106182
35.1 cm	31 Jul 2007	Waterdale	106182

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 surveyed	First recorded	Last recorded	Visits finding perch
Amwell Loop	12 Apr 1978	23 Jul 2026	21
Fishers Green	9 Jun 1992	7 Jul 2026	20
Wheathampstead	18 Oct 2002	9 Jun 2026	16
Hackney Marshes	11 Nov 2003	11 Sept 2025	13
Stanborough Park	10 Sept 2003	24 Jun 2025	12
Hyde Mill	8 Jul 2008	17 Jun 2025	8
Waterdale	22 Oct 2002	1 Aug 2019	9
Hartham Leisure centre	24 Jun 2019	24 Jun 2019	1
Hartham Common	24 Oct 2002	21 Jun 2018	14
Powder Mill Cut	22 Oct 1992	27 Jul 2015	6
Kings Weir	11 Jun 1992	2 Jun 2015	2
Kings Weir Back Loop	29 May 2014	29 May 2014	1
Woolmers Park	1 Nov 2002	16 Jul 2013	10
Essendon	11 Sept 2003	26 Jun 2013	9
d/s Leebridge Rd	7 Oct 2009	13 Oct 2010	2
Tottenham Lock d/s	8 Oct 2009	13 Oct 2010	2
Stonebridge to Tottenham Lock	7 Oct 2009	12 Oct 2010	2
Springfield Marina u/s	8 Oct 2009	8 Oct 2009	1
Flour Mills Loop	25 Sept 2003	1 Jul 2009	5
Waterend	8 Mar 1978	17 Apr 2008	2
Batford	16 Apr 2008	16 Apr 2008	1
Bush hall	27 Nov 2007	27 Nov 2007	1
Bayford	7 Nov 2003	27 Oct 2006	2
Walthamstow Resevoirs	2 Mar 1993	2 Mar 1993	1
River Lynch	13 Oct 1992	13 Oct 1992	1
Manifold Ditch	6 Oct 1992	6 Oct 1992	1
Downstream Cecil Saw Mills	15 Mar 1978	15 Mar 1978	1
East Hyde Downstream sewage treatment works	22 Feb 1978	22 Feb 1978	1

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

1978–2026

Survey records by year

Each bar shows how many survey visits recorded perch that year.

478

079

080

081

082

083

084

085

086

087

088

089

090

091

592

293

094

095

096

097

098

099

000

001

502

1103

1104

705

1106

1107

1208

1609

1110

411

212

813

414

415

516

417

418

719

020

021

322

423

224

525

326

Fish measured by surveyors

Measured length distribution

See how the 2,123 measured fish were spread across different length ranges.

Smallest: 3 cm
Lower quarter: 7.9 cm
Median: 11.3 cm
Upper quarter: 15.2 cm
Largest: 39.2 cm

0–99 mm

838

100–199 mm

1109

200–299 mm

146

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 3 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest: 3.5 oz (0.1 kg)
Lower quarter: 3.5 oz (0.1005 kg)
Median: 3.6 oz (0.101 kg)
Upper quarter: 5.1 oz (0.1455 kg)
Heaviest: 6.7 oz (0.19 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 Lee

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

Roach Gudgeon Minnow Chub Pike Dace

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 →