Perch · Perca fluviatilis

Perch in the River Thames

Largest measured perch: 53 cm

The largest perch measured in Environment Agency surveys of the River Thames was 53 cm, recorded at Roundhouse to St Johns(mid-river) on 26 June 2002.

Across 8,592 measured perch, the median measured length was 14.1 cm.

Surveyors recorded one individual weight: 6.2 oz (0.175 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 Thames.

See perch records across England →

Most recent observation16 October 2025Hannington Bridge · 10 fish

Largest measured perch: 53 cm
Median length: 14.1 cm
Fish measured: 8,592
Survey locations: 77

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
53 cm	26 Jun 2002	Roundhouse to St Johns(mid-river)	68681
45.4 cm	15 Jul 2025	Abingdon - Culham (Margin)	178486
45.2 cm	26 Sept 2025	Godstow to Osney	179651
44.5 cm	16 Jul 2022	Abingdon Weirpool	162142
44.5 cm	6 Jul 2001	Culham - Clifton Hampden (Margin)	82784
43.5 cm	4 Oct 2018	Port Meadow (Day/Night)	154028
43.2 cm	12 Jul 2017	Iffley - Sandford (Margin)	151006
43.2 cm	1 Oct 2015	Northmoor- Pinkhill	146944
43.1 cm	24 Oct 2008	Godstow to Osney	115985
43 cm	24 Sept 2025	Rushey to Shifford	179691

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
Hannington Bridge	29 Aug 2003	16 Oct 2025	12
Castle Eaton	23 May 2002	16 Oct 2025	15
Cricklade	23 May 2002	14 Oct 2025	14
Godstow to Osney	19 Jun 2001	26 Sept 2025	19
Eynsham- kings	14 Jun 2001	26 Sept 2025	18
Northmoor- Pinkhill	12 Jun 2001	25 Sept 2025	18
Rushey to Shifford	7 Jun 2001	24 Sept 2025	20
Buscot to Grafton	5 Jun 2001	23 Sept 2025	18
Roundhouse to St Johns(margins)	26 Jun 2002	22 Sept 2025	18
Hambleden - Hurley (margin)	24 Jul 2001	25 Jul 2025	16
Shiplake-marsh - (Margin)	24 Jul 2002	24 Jul 2025	16
Shiplake - Marsh (Weirpool)	22 Jul 2003	24 Jul 2025	9
Caversham-sonning - (Margin)	17 Jul 2001	23 Jul 2025	16
Caversham (Weirpool)	17 Jul 2003	23 Jul 2025	10
Whitchurch to Mapledurham (Margin)	12 Jul 2001	22 Jul 2025	16
Whitchurch (Weirpool)	12 Jul 2001	22 Jul 2025	11
Cleeve - Goring (Weirpool)	15 Jul 2003	21 Jul 2025	7
Days weirpool	11 Jul 2009	20 Jul 2025	5
Days - Benson (Margin)	24 Sept 1993	20 Jul 2025	26
Clifton Weir Stream	17 Jul 2008	19 Jul 2025	13
Clifton Hampden - Days (Margin)	23 Sept 1993	19 Jul 2025	28
Culham Weirpool	16 Jul 2011	18 Jul 2025	10
Abingdon - Culham (Margin)	21 Sept 1993	15 Jul 2025	30
Sandford Weir stream	7 Jul 2009	10 Jul 2025	9
Sandford - Abingdon - (Margin)	20 Sept 1993	10 Jul 2025	29
Iffley - Sandford (Margin)	11 Jul 1999	9 Jul 2025	23
Culham - Clifton Hampden (Margin)	22 Sept 1993	12 Jul 2024	27
Godstow Weirpool	23 Oct 2013	29 Sept 2023	8
Abingdon Weirpool	8 Jul 2009	21 Jul 2023	12
Shifford Fish Pass	2 Nov 2022	2 Nov 2022	1
Water eaton	2 Oct 2002	18 Oct 2022	12
Hambleden - Hurley (Weirpool)	23 Jul 2003	27 Jul 2022	12
Port Meadow (Day/Night)	22 Jun 2018	16 Jul 2019	5
Canal confluence to Marina	22 Jun 2018	15 Jul 2019	5
Cleeve-Goring - (Margin)	3 Jul 2001	8 Jul 2016	13
Sutton Pools	7 Oct 2014	7 Oct 2014	1
Rushey bypass channel	18 Sept 2014	18 Sept 2014	1
Mapledurham Mill Channel	16 Apr 2014	16 Apr 2014	1
Shifford Lock Cut	18 Oct 2013	18 Oct 2013	1
St John's Lock Cut	16 Oct 2013	16 Oct 2013	1
Buscot weir pool	24 Sept 2003	16 Oct 2013	6
Radcot Fish Pass	25 Sept 2013	25 Sept 2013	1
Hailstone farm	18 Mar 2004	21 Aug 2013	2
Sonning Weir	17 Jul 2009	12 Jul 2013	3
Sonning - shiplake (Margin)	17 Jul 2009	12 Jul 2013	5
Goring weir pool	20 Jul 2008	9 Jul 2013	5
Goring to Whitchurch (Margin)	20 Jul 2008	9 Jul 2013	6
Benson Weirpool	7 Jul 2013	7 Jul 2013	1
u/s of Waterhay Bridge	15 May 2013	15 May 2013	1
Cerney Wick Brook	31 Mar 2004	10 Apr 2013	2
Rushey Weir Pool	19 Sept 2005	25 Oct 2011	5
Goring Weirpool-Fyke Netting	20 Jun 2011	20 Jun 2011	1
Eynsham weirpool	1 Oct 2003	16 Oct 2009	4
Mapledurham weirpool	22 Jul 2008	22 Jul 2008	1
Shifford to Newbridge - Windrush Confluence	23 Oct 2007	23 Oct 2007	1
Newbridge - Windrush Confluence - to Northmoor	23 Oct 2007	23 Oct 2007	1
Eynsham Weir Stream	17 Mar 2006	7 Sept 2007	3
Port Meadow	1 Sept 2007	1 Sept 2007	1
Donnington Bridge	1 Sept 2007	1 Sept 2007	1
St Patricks stream	16 Nov 2006	16 Nov 2006	1
Northmoor Wier pool	26 Sept 2003	17 Oct 2006	3
Days - Benson (Middle)	24 Sept 1993	9 Jul 2005	12
Clifton Hampden - Days (Middle)	23 Sept 1993	8 Jul 2005	10
Culham - Clifton Hampden (Middle)	22 Sept 1993	7 Jul 2005	12
Abingdon - Culham (Middle)	21 Sept 1993	6 Jul 2005	10
Sandford - Abingdon - Middle	20 Sept 1993	5 Jul 2005	9
Iffley - Sandford (Middle)	11 Jul 1999	4 Jul 2005	5
Lower Mill Estate	23 Mar 2004	23 Mar 2004	1
Waterhay bridge	18 Mar 2004	18 Mar 2004	1
Godstow weirstream	1 Oct 2003	1 Oct 2003	1
400yds d/s hannington B-small trib on RB	24 Sept 2002	24 Sept 2002	1
Hambleden - Hurley (middle)	24 Jul 2001	25 Jul 2002	2
Shiplake-Marsh - (Mid-River)	24 Jul 2002	24 Jul 2002	1
Caversham-sonning - (Mid River)	17 Jul 2001	23 Jul 2002	2
Whitchurch - Mapledurham (Middle)	12 Jul 2001	18 Jul 2002	2
Cleeve-Goring - (Mid River)	3 Jul 2001	17 Jul 2002	2
Roundhouse to St Johns(mid-river)	26 Jun 2002	26 Jun 2002	1

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

1993–2025

Survey records by year

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

1093

1094

095

996

897

898

1299

1000

2301

2802

3503

3604

3405

3106

2907

2708

3509

2710

2711

1612

4213

1814

1815

2916

1317

1818

1919

020

021

2422

1423

1624

2625

Fish measured by surveyors

Measured length distribution

See how the 8,592 measured fish were spread across different length ranges.

Smallest: 2.6 cm
Lower quarter: 10.7 cm
Median: 14.1 cm
Upper quarter: 18.2 cm
Largest: 53 cm

0–99 mm

1726

100–199 mm

5234

200–299 mm

1104

300–399 mm

473

400–499 mm

500–599 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 6.2 oz (0.175 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 Thames

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

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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 →