RiverFish

Grayling · Thymallus thymallus

Grayling in the River Wylye

Largest measured grayling: 40.4 cm

The largest grayling measured in Environment Agency surveys of the River Wylye was 40.4 cm, recorded at Wylye Fly Fisheres - u/s access bridge on 13 October 2011.

Across 1,541 measured grayling, the median measured length was 14.5 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 Wylye.

See grayling records across England →

Most recent observation10 September 2025Butchers Stream at Wilton · 2 fish
Largest measured grayling
40.4 cm
Median length
14.5 cm
Fish measured
1,541
Survey locations
18

Individual EA measurements

Largest measured grayling

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

LengthSurvey dateSurvey locationSurvey ID
40.4 cm13 Oct 2011Wylye Fly Fisheres - u/s access bridge128833
39.2 cm25 Oct 2007Langford Lakes d/s weir pool108259
38.7 cm3 Oct 2013Langford Lakes d/s weir pool139417
38.7 cm26 Sept 2007Butchers Stream at Wilton108159
38.6 cm13 Oct 2011Wylye Fly Fisheres - u/s access bridge128833
38.6 cm4 Oct 2005Butchers Stream at Wilton86641
38.4 cm10 Oct 2008Butchers Stream at Wilton116086
38 cm13 Oct 2011Wylye Fly Fishers - Cottage Beat128564
37.5 cm10 Jul 2014Mount Mill Downstream of Weir141688
37.5 cm14 Sept 2004Norton Bavant82180

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 surveyedFirst recordedLast recordedVisits finding grayling
Butchers Stream at Wilton7 Sept 200110 Sept 202519
Langford Lakes d/s weir pool14 Sept 200619 Sept 20198
Wylye Fly Fishers - Cottage Beat12 Oct 201026 Sept 20173
Wylye Fly Fishers (Beat A)26 Sept 201726 Sept 20171
Upstream South Newton Mill2 Oct 20142 Oct 20141
d/s Gunsville31 Aug 20044 Sept 20142
Mount Mill Upstream of Weir10 Jul 201410 Jul 20141
Mount Mill Downstream of Weir10 Jul 201410 Jul 20141
Upstream South Newton15 Oct 201215 Oct 20121
Steeple langford d/s mill15 Oct 201215 Oct 20121
Bathampton House15 Oct 201215 Oct 20121
South Newton10 Oct 200827 Sept 20122
Wylye Fly Fisheres - u/s access bridge12 Oct 201013 Oct 20112
Langford Lakes US weir pool14 Sept 200611 Oct 20113
7 Hatches29 Sept 201129 Sept 20111
Norton Bavant14 Sept 200414 Sept 20113
Chilhampton Farm12 Oct 200412 Oct 20041
Manor Farm Bridge31 Aug 200431 Aug 20041

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 grayling that year.

Fish measured by surveyors

Measured length distribution

See how the 1,541 measured fish were spread across different length ranges.

Smallest
7.8 cm
Lower quarter
12.8 cm
Median
14.5 cm
Upper quarter
23.7 cm
Largest
40.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wylye

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

Brown / sea trout Bullhead Atlantic salmon Minnow Stone loach European eel

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 →