RiverFish

Roach · Rutilus rutilus

Roach in the River Lee

Largest measured roach: 38.5 cm

The largest roach measured in Environment Agency surveys of the River Lee was 38.5 cm, recorded at Downstream Cecil Saw Mills on 15 March 1978.

Across 16,235 measured roach, the median measured length was 11.1 cm.

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 roach records across England →

Most recent observation23 July 2026Amwell Loop · 1 fish
Largest measured roach
38.5 cm
Median length
11.1 cm
Fish measured
16,235
Survey locations
34

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
38.5 cm15 Mar 1978Downstream Cecil Saw Mills116724
36.9 cm22 Feb 1978East Hyde Downstream sewage treatment works116721
35.9 cm9 Jun 2026Wheathampstead181612
34.5 cm15 Mar 1978Downstream Cecil Saw Mills116724
33.2 cm29 Mar 1978Hertford Football Ground116718
32.7 cm28 Jan 1993Fishers Green116055
32.6 cm17 Jul 2007Amwell Loop106256
32.2 cm9 Jun 2026Wheathampstead181612
32.1 cm16 Apr 2008Batford110761
31.7 cm9 Jun 2026Wheathampstead181612

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
Amwell Loop12 Apr 197823 Jul 202618
Wheathampstead18 Oct 20029 Jun 202620
Hackney Marshes11 Nov 200311 Sept 202514
Waterdale31 Oct 200331 Jul 202510
Fishers Green6 Sept 197829 Jul 202518
Red Spinners Bayford4 Aug 201717 Jul 20254
Stanborough Park10 Sept 200324 Jun 202513
Woolmers Park1 Nov 20023 Aug 202311
Hartham Leisure centre24 Jun 201924 Jun 20191
Hartham Common Weir21 Jun 201821 Jun 20181
Hartham Common24 Oct 200221 Jun 201814
Fishers Green barbel investigation3 Nov 20173 Nov 20171
Powder Mill Cut22 Oct 199227 Jul 20156
Kings Weir - Weirpool2 Jun 20152 Jun 20151
Kings Weir11 Jun 19922 Jun 20152
Batford16 Apr 200819 Jun 20142
Kings Weir Back Loop14 May 201329 May 20142
Essendon11 Sept 200326 Jun 20139
d/s Leebridge Rd7 Oct 200913 Oct 20102
Tottenham Lock d/s8 Oct 200913 Oct 20102
Stonebridge to Tottenham Lock7 Oct 200912 Oct 20102
Hyde Mill9 Sept 200312 Jul 20107
Springfield Marina u/s8 Oct 20098 Oct 20091
Flour Mills Loop11 Feb 19931 Jul 20095
Waterend8 Mar 197817 Apr 20082
Bush hall27 Nov 200727 Nov 20071
Bayford15 Sept 20046 Sept 20052
Walthamstow Resevoirs2 Mar 19932 Mar 19931
River Lynch13 Oct 199213 Oct 19921
Manifold Ditch6 Oct 19926 Oct 19921
Hertford Football Ground29 Mar 197829 Mar 19781
Water Hall Farm22 Mar 197822 Mar 19781
Downstream Cecil Saw Mills15 Mar 197815 Mar 19781
East Hyde Downstream sewage treatment works22 Feb 197822 Feb 19781

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 roach that year.

Fish measured by surveyors

Measured length distribution

See how the 16,235 measured fish were spread across different length ranges.

Smallest
1 cm
Lower quarter
8.2 cm
Median
11.1 cm
Upper quarter
13.6 cm
Largest
38.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lee

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

Perch 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 →