Chalk Stream · Chalk · Dorset

River Frome (Dorset)

The River Frome, a chalk stream, flowing through water meadows west of Dorchester, Dorset.
Marginal · Brown Trout
Black Gnat · 16-20
Marginallive now
Slow going — pick your moments
River temperature is the limiting factor today, not the flow. Fish dawn or dusk if you go at all, and handle everything with extra care.
80% confidence
What moved it
  • Level0.04 mDropping after lift
  • Water temp20.3°C
  • ClarityClear
Today's fly
Black Gnat
Black Gnat16-20
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
0.04 m
Dropping after lift
Water temp20.3°C
ClarityClear
Weather29°C
WindS 13 km/h
Pressure1020 hPa
Rain · recent0.0 mm
Rain · ahead0.0 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Warm — slow
20°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Why this works
Water at 20.3°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots.
Hatch timeline · todayPeak at 6pm

Hatch predictions

Today's headline hatch shown — see all 9 active hatches hour by hour with Pro.

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Sub-surface · on the nymphunder the surface

Hatch predictions

See the full sub-surface read with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · August highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Grayling seasonSeason
2
2
1
1
2
2
2
2
2
2
Brown SedgeHatch
2
3
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
Blue Winged OliveHatch
2
3
3
3
3
2
Mayfly (Green Drake)Hatch
2
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box
Local classics: Grey Wulff·Elk Hair Caddis·Pheasant Tail Nymph
Beats · 6 · 5 reaches

This is the Dorset Frome — the major chalk stream of south-west England, rising near Evershot and running past Dorchester to tidewater near Wareham — not the Somerset/Wiltshire Frome near Bath. It is not one fishery: its core is brown trout and grayling on estate, club and day-ticket water around Wrackleford, Dorchester and Moreton, with the Cerne and Piddle forming part of the practical system. The lower river has historic salmon and sea-trout importance but salmon are in severe decline and must be treated conservation-first, never as a destination. There is no single Frome permit — confirm controller, season, method rules and whether your ticket covers the main river, a carrier, the Cerne or the Piddle before travelling.

Wrackleford EstateDay tickets
The strongest practical day-ticket option on the Frome — chalk-stream fly fishing just north of Dorchester across eight river beats suitable for one or two rods, each with a fishing hut, plus a separate stillwater lake.
Dorchester Fishing ClubDay tickets
A historic private club founded in 1877, holding about twelve miles of wild brown trout and grayling water across the main Frome, the Cerne and the Piddle, including carriers and side streams above and below Dorchester.
Wessex Chalk Streams (Moreton) · 2 beatsDay rods
Wessex Chalk Streams — Moreton beats, Wessex Chalk Streams Syndicate — Frome beats
The 2 beats
Wessex Chalk Streams — Moreton beatsDay tickets
Wessex Chalk Streams
The clearest agent/day-ticket route — day-ticket Moreton beats on the Frome with stocked and wild brown trout, fine grayling, and the chance of a sea trout or salmon. The carrier is similar in size to the Piddle and the main river comparable to the middle Wylye. Best for an angler who wants a flexible Frome/Piddle small-chalk-stream package.
Day-ticket beats. Any sea trout/salmon are a bonus to a trout-and-grayling fishery, conservation-sensitive — not a salmon destination.
Wessex Chalk Streams Syndicate — Frome beatsSeason rods
Wessex Chalk Streams
Syndicate membership giving access to seven River Frome beats (plus Piddle and Hooke water) with wild and stocked brown trout, specimen grayling and occasional salmon and sea trout — the multi-beat option for anglers who want more than a single estate day.
Syndicate membership rather than a day ticket. Salmon/sea trout occasional and conservation-sensitive.
Tincleton — River Frome (Christchurch AC)Members
Lower-middle Frome club water at Tincleton, with wild brown trout and grayling the main game quarry and classic winter long-trotting for grayling — fish over 3 lb reported.
Lower Frome — salmon & sea-trout context (Wareham)Enquiry
The lower Frome towards Wareham and Poole Harbour has historic and scientific importance for salmon and sea trout, but recent juvenile-salmon counts have been catastrophic.
What's coming
Plan ahead
5-day outlook
Water here around 20°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. The River Frome, a chalk stream, flowing through water meadows west of Dorchester, Dorset.
    The River Frome looking west towards Dorchester, Dorset.
  2. Terrain map of the venue
    Terrain map
Water quality (WFD)
  • Ecology: Poor
  • Chemical: Fail
What this classification means

EA waterbody 'Frome Dorset (Lower) u/s Louds Mill Dorchester' (GB108044009691) — the main Frome chalkstream through and above Dorchester (monitoring at Bradford Peverell, Notton, u/s Dorchester STW). Latest EA data (Cycle 3, 2022): Poor ecological status. Chemical 'Fail' reflects the England-wide ubiquitous-substance failure (mercury and PBDE in biota); the 2022 cycle itself records chemical as 'does not require assessment'. Corrected 2026-06-18 from GB108044009650, which is the River Win (a Frome tributary), not the main stem; ecological status was also wrong (recorded Good, actually Poor).

EA (England) · GB108044009691

The full read · show the working · for Brown Trout · confidence 80%
How the 26 is built — score × weight = contribution
Temperature21 × 28%5.9
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity64 × 12%7.7
Limiting factor: Water temperature (20.3°C) is outside Brown Trout's preferred range (10–16°C)= 61
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 April → 15 October
  • Grayling 16 June → 14 March

    Statutory window is 16 June – 14 March. Frome grayling access varies by beat: Ilsington runs October–November, Wrackleford 16 October–31 January. Always check the specific beat.

    Typically fished 1 October → 31 January.

    Prime sport 1 October → 31 January

Salmon: Negligible (2026) — Around 400 salmon returned in 2024 vs a 10-year average of 2,500 — catastrophic decline. Conservation and research river. Not a salmon fishing destination.

Related guides
Chalkstream Playbookchalk stream tacticsGrayling Playbookgrayling tacticsTrout Near Londonaccess guide
Casting instructors near here
Booking & contacts
Clubs & associations