Chalk Stream · Chalk · Dorset

River Piddle

A weir on the River Piddle chalk stream near Trigon Farm, Dorset, with clear water flowing over the structure surrounded by rural countryside.
Poor · Brown Trout
Black Gnat · 16-20
Poorlive now
Not the day for it
River temperature is the limiting factor today, not the flow. This is not the day to push it. Check the thermal advice above before you head out.
90% confidence
What moved it
  • Level0.16 mLast reading 33 min ago
  • Water temp23.0°C
  • ClarityClear
Today's fly
Black Gnat
Black Gnat16-20
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
0.16 m
Last reading 33 min ago
Water temp23.0°C
ClarityClear
Weather30°C
WindNW 21 km/h
Pressure1017 hPa
Rain · recent0.0 mm
Rain · ahead0.3 mm

Live readings only. Trends shown where the gauge supports them.

Water temperature for Brown Trout
Warm — slow
23.0°Cideal 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 23°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 4 active hatches hour by hour with Pro.

Start free trial

14-day free trial. Cancel anytime.

Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

Start free trial

14-day free trial. Cancel anytime.

Evidence
Survey-backed · regionalModerate 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: Pheasant Tail Nymph·CDC Olive·Iron Blue Dun
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Water here at 23.0°C — too warm to fish Brown Trout safely. These are cooler.
Flowers Farm Trout Lakes
25 km
~19°C
Rainbow trout · Brown trout
Wessex Fly Fishing
7.0 km
~23°C
Rainbow trout · Brown trout
Gallery · 2
  1. A weir on the River Piddle chalk stream near Trigon Farm, Dorset, with clear water flowing over the structure surrounded by rural countryside.
    The River Piddle near Trigon Farm, a chalk stream weir close to Wareham, Dorset.
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brown Trout · confidence 90%
How the 4 is built — score × weight = contribution
Temperature2 × 28%0.6
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity58 × 12%7.0
Limiting factor: Water temperature (23°C) is outside Brown Trout's preferred range (10–16°C)= 56
Can you trust it?
Water temperaturelive gauge readinggauge
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. Mostly private syndicate water — treat October to February as a provisional working default and confirm with the beat.

    Typically fished 1 October → 28 February.

    Prime sport 1 October → 28 February

Related guides
Chalkstream Playbookchalk stream tacticsTrout Near Londonaccess guideEuro Nymphingsubsurface methods
Casting instructors near here
Booking & contacts
Clubs & associations