RiverFish

Brown / sea trout · Salmo trutta

Brown / sea trout in the River Medway

Largest measured brown / sea trout: 43.5 cm

The largest brown / sea trout measured in Environment Agency surveys of the River Medway was 43.5 cm, recorded at D/s Weirwood Reservoir on 4 September 2006.

Across 494 measured brown / sea trout, the median measured length was 19.2 cm.

Surveyors recorded weights for 46 brown / sea trout. The median was 4.9 oz (0.14 kg) and the largest recorded weight was 1 lb 3.5 oz (0.554 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 Medway.

See brown / sea trout records across England →

Most recent observation23 October 2025Hartfield · 6 fish
Largest measured brown / sea trout
43.5 cm
Median length
19.2 cm
Fish measured
494
Survey locations
9

Individual EA measurements

Largest measured brown / sea trout

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

LengthSurvey dateSurvey locationSurvey ID
43.5 cm4 Sept 2006D/s Weirwood Reservoir103365
41.5 cm9 Oct 2007Grom/Medway Confluence u/s107274
40.5 cm9 Oct 2007Grom/Medway Confluence u/s107274
39 cm6 Aug 2009D/s Ashurst Road Bridge119593
37.8 cm25 Aug 2016Ashdown House Farm149135
37.6 cm4 Sept 2006D/s Weirwood Reservoir103365
37 cm9 Oct 2007Grom/Medway Confluence u/s107274
35 cm25 Sept 2002Ham Farm72830
34.8 cm19 Oct 2005D/s Weirwood Reservoir87479
32.8 cm25 Jun 2009D/s Weirwood Reservoir119560

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

Explore the river

Where brown / sea trout were found

Each point marks a survey location with at least one brown / sea trout 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 brown / sea trout
Hartfield23 Aug 200123 Oct 202524
Fordcombe14 Nov 200115 Oct 202514
D/s Weirwood Reservoir12 May 20049 Sept 20259
D/s Ashurst Road Bridge29 Jul 200218 Sept 20243
Ashdown House Farm11 Aug 201125 Aug 20162
Penshurst6 Sept 200617 Aug 20113
Grom/Medway Confluence u/s9 Oct 20079 Oct 20071
Gallypot12 Apr 20043 Oct 20072
Ham Farm25 Sept 200225 Sept 20021

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 brown / sea trout that year.

Fish measured by surveyors

Measured length distribution

See how the 494 measured fish were spread across different length ranges.

Smallest
6.2 cm
Lower quarter
15.5 cm
Median
19.2 cm
Upper quarter
24 cm
Largest
43.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 46 brown / sea trout. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.8 oz (0.024 kg)
Lower quarter
2.3 oz (0.0665 kg)
Median
4.9 oz (0.14 kg)
Upper quarter
6.8 oz (0.194 kg)
Heaviest
1 lb 3.5 oz (0.554 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 Medway

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

Chub Gudgeon Roach Perch Bleak Dace

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 →