Grayling · Thymallus thymallus

Grayling in the River Windrush

Largest measured grayling: 45 cm

The largest grayling measured in Environment Agency surveys of the River Windrush was 45 cm, recorded at Lower Upton Farm on 22 April 2005.

Across 240 measured grayling, the median measured length was 22.1 cm.

Surveyors recorded weights for 7 grayling. The median was 1 oz (0.028 kg) and the largest recorded weight was 10.3 oz (0.292 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 Windrush.

See grayling records across England →

Most recent observation7 October 2025New Bridge (Gt Rissington) · 6 fish

Largest measured grayling: 45 cm
Median length: 22.1 cm
Fish measured: 240
Survey locations: 6

Individual EA measurements

Largest measured grayling

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
45 cm	22 Apr 2005	Lower Upton Farm	88352
43.2 cm	22 Apr 2005	Lower Upton Farm	88352
42.8 cm	22 Apr 2005	Lower Upton Farm	88352
39.5 cm	22 Apr 2005	Lower Upton Farm	88352
38.8 cm	22 Apr 2005	Lower Upton Farm	88352
37.8 cm	26 Sept 2002	New Bridge (Gt Rissington)	72270
36.2 cm	7 Oct 2025	New Bridge (Gt Rissington)	179523
35.7 cm	6 Oct 2005	New Bridge (Gt Rissington)	88312
35 cm	19 Apr 2005	New Bridge (Gt Rissington)	88353
34.2 cm	22 Apr 2005	Lower Upton Farm	88352

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

Explore the river

Where grayling were found

Each point marks a survey location with at least one grayling 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 grayling
New Bridge (Gt Rissington)	26 Sept 2002	7 Oct 2025	14
Barrington Park	6 Sept 2023	6 Sept 2023	1
Sherborne project	28 Jun 2023	28 Jun 2023	1
Minster Lovell	25 Sept 2002	22 Sept 2011	3
Lower Upton Farm	15 Mar 2002	5 Oct 2005	7
Worsham	1 Apr 2003	1 Apr 2003	1

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 grayling that year.

402

503

304

405

206

107

108

009

110

111

012

013

014

015

116

017

018

019

020

021

022

323

024

125

Fish measured by surveyors

Measured length distribution

See how the 240 measured fish were spread across different length ranges.

Smallest: 9 cm
Lower quarter: 13.7 cm
Median: 22.1 cm
Upper quarter: 25.8 cm
Largest: 45 cm

0–99 mm

100–199 mm

101

200–299 mm

109

300–399 mm

400–499 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 7 grayling. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.6 oz (0.018 kg)
Lower quarter: 0.8 oz (0.022 kg)
Median: 1 oz (0.028 kg)
Upper quarter: 4.5 oz (0.128 kg)
Heaviest: 10.3 oz (0.292 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 Windrush

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

Brown / sea trout Chub Pike Dace Perch Roach

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 →