Grayling · Thymallus thymallus

Grayling in the River Western Rother

Largest measured grayling: 32.4 cm

The largest grayling measured in Environment Agency surveys of the River Western Rother was 32.4 cm, recorded at Terwick Mill on 1 July 2005.

Across 178 measured grayling, the median measured length was 21.5 cm.

Surveyors recorded weights for 80 grayling. The median was 4.2 oz (0.118 kg) and the largest recorded weight was 14.7 oz (0.417 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 Western Rother.

See grayling records across England →

Most recent observation16 June 2026Terwick Mill · 11 fish

Largest measured grayling: 32.4 cm
Median length: 21.5 cm
Fish measured: 178
Survey locations: 7

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
32.4 cm	1 Jul 2005	Terwick Mill	86730
32 cm	29 Jun 2005	Woolbeding	86739
31.7 cm	1 Jul 2005	Terwick Mill	86730
31.5 cm	14 Jul 2015	Terwick Mill	145438
30.6 cm	12 Jul 2022	Terwick Mill	161153
29.7 cm	1 Jul 2005	Terwick Mill	86730
29.5 cm	5 Jul 2006	Habin Bridge	101688
28.9 cm	13 Jun 2024	Woolbeding	165272
28.9 cm	17 Jul 2002	Durford Bridge	62302
28.5 cm	5 Jul 2011	Woolbeding	126930

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
Terwick Mill	18 Jul 2002	16 Jun 2026	20
Stanbridge	20 Jul 2004	31 Jul 2025	9
Woolbeding	18 Jul 2002	13 Jun 2024	12
Stedham Mill Downstream	15 Jul 2016	15 Jul 2016	1
Habin Bridge	11 Jul 2003	11 Jul 2007	5
Cowdray Estate	6 Jul 2005	19 Sept 2006	2
Durford Bridge	17 Jul 2002	13 Jul 2006	4

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

2002–2026

Survey records by year

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

302

303

504

505

606

407

108

109

210

211

012

213

214

315

316

017

218

119

020

021

222

123

224

225

126

Fish measured by surveyors

Measured length distribution

See how the 178 measured fish were spread across different length ranges.

Smallest: 6 cm
Lower quarter: 19.5 cm
Median: 21.5 cm
Upper quarter: 25 cm
Largest: 32.4 cm

0–99 mm

100–199 mm

200–299 mm

121

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 80 grayling. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 3.1 oz (0.088 kg)
Median: 4.2 oz (0.118 kg)
Upper quarter: 6.4 oz (0.1822 kg)
Heaviest: 14.7 oz (0.417 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 Western Rother

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

European eel Brown / sea trout Bullhead Stone loach Minnow Chub

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 →