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 |
|---|---|---|---|
| 48.5 cm | 2 Sept 2002 | Swimming Pool, Winchester | 55089 |
| 42.8 cm | 6 Oct 2008 | Shawford Park | 116170 |
| 41.6 cm | 27 Oct 2003 | Railway | 78015 |
| 40.8 cm | 11 Aug 2009 | Chilland House | 120051 |
| 40.3 cm | 6 Oct 2004 | Railway | 82693 |
| 40.2 cm | 27 Oct 2003 | Railway | 78015 |
| 40 cm | 11 Aug 2009 | Chilland House | 120051 |
| 39 cm | 2 Sept 2002 | Swimming Pool, Winchester | 55089 |
| 38.6 cm | 27 Oct 2003 | Railway | 78015 |
| 38.5 cm | 27 Oct 2003 | Railway | 78015 |
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 |
|---|---|---|---|
| St Cross Bridge | 5 Sept 2025 | 5 Sept 2025 | 1 |
| Wolvesey Lodge | 20 Aug 2002 | 4 Sept 2025 | 8 |
| Swimming Pool, Winchester | 2 Sept 2002 | 3 Sept 2025 | 4 |
| Bishopstoke Barge | 31 Aug 2004 | 29 Aug 2025 | 13 |
| Shawford Park | 6 Oct 2008 | 28 Aug 2025 | 10 |
| Fulling Mill, Abbott's Worthy | 10 Sept 2013 | 21 Aug 2025 | 3 |
| Abbots Worthy, u/s Mill | 16 Oct 2018 | 19 Oct 2024 | 2 |
| Abbots Worthy, Rochienne's d/s offtake | 24 Oct 2018 | 24 Oct 2018 | 1 |
| Abbots Worthy, d/s M3 | 16 Oct 2018 | 16 Oct 2018 | 1 |
| Twyford Lodge | 18 Oct 2011 | 18 Oct 2011 | 1 |
| Abbott's Barton, duck's nest spinney | 27 Sept 2010 | 27 Sept 2010 | 1 |
| Abbott's Barton Upper | 10 Oct 2007 | 27 Sept 2010 | 2 |
| Bishopstoke Lock | 5 Sept 2002 | 4 Sept 2009 | 5 |
| Lower Itchen Fishery - d/s viaduct | 28 Aug 2009 | 28 Aug 2009 | 1 |
| Caravan Pool, Highbridge | 24 Aug 2009 | 24 Aug 2009 | 1 |
| Chilland House | 11 Aug 2009 | 11 Aug 2009 | 1 |
| Railway | 25 Sept 2002 | 31 Aug 2005 | 4 |
| Shawford, downtream of Norris's Bridge | 24 Sept 2002 | 24 Sept 2002 | 1 |
| The Willow | 18 Sept 2002 | 18 Sept 2002 | 1 |
| College, Winchester | 16 Sept 2002 | 16 Sept 2002 | 1 |
| River Inn | 5 Sept 2002 | 5 Sept 2002 | 1 |
| Blackbridge | 2 Sept 2002 | 2 Sept 2002 | 1 |
| BR Lock | 15 Aug 2002 | 15 Aug 2002 | 1 |
| Rickety | 19 Sept 2001 | 14 Aug 2002 | 2 |
| Coneger Lock | 14 Aug 2002 | 14 Aug 2002 | 1 |
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 1,333 measured fish were spread across different length ranges.
- Smallest
- 2.3 cm
- Lower quarter
- 11.9 cm
- Median
- 19.9 cm
- Upper quarter
- 23.4 cm
- Largest
- 48.5 cm
Lengths are direct survey measurements rather than anglers’ catches.
Fish weighed by surveyors
Measured weight summary
Recorded weights were available for 711 grayling. This is a subset of the measured fish and may not represent the whole population.
- Lightest
- 0.1 oz (0.004 kg)
- Lower quarter
- 0.6 oz (0.017 kg)
- Median
- 2.3 oz (0.066 kg)
- Upper quarter
- 4.5 oz (0.1265 kg)
- Heaviest
- 1 lb 15.3 oz (0.887 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 Itchen
Compare other species with enough survey and measurement data for a detailed page.
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 →