Stoneflies
Gammarids
Crystal-clear spring-fed water with wild brown trout, prolific hatches, and the intimate scale that makes chalk stream fishing so absorbing.
- Chalk
Water temperature for Brown Trout
Ideal10°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.
Likely species
Hatch timeline · todayPeak at 12pm
12pm(now) — Autumn Olive
Stage: On emergersApproach: Emerger or dryActivity: 51%
Also:Autumn Needle Fly32%Black Midge28%
Peak emergence window5 food groups active
Peak activity at 12pm — Autumn Olive (Autumn Olive, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 4 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 3 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · November 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
Mayfly (Green Drake)Hatch
2
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
CapererHatch
2
3
3
2
Brown SedgeHatch
2
3
3
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
A chalk stream shrunk to its essentials — clear, weedy, and quick to spook. Fish rise freely to a small dry in the hatch windows; between them, the induced take earns its keep.
Local classics: Pheasant Tail Nymph·CDC Olive·Iron Blue Dun
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The River Piddle near Trigon Farm, a chalk stream weir close to Wareham, Dorset. Terrain map
About this water
Water quality (WFD)
- Ecology: Moderate
Water quality details
- Dissolved oxygen: High
- Ammonia (Phys-Chem): High
- pH: High
- Phosphate: High
- Temperature: High
EA (England) · GB108044010080
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature93 × 28%26.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 79
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
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
Casting instructors near here
Booking & contacts
Clubs & associations
- Wessex Fly FishingDay tickets
Boards & regulators
River Piddle
Classic Dorset chalk stream flowing through the Piddle Valley to Poole Harbour.
Water temperature for Brown Trout
Ideal10°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.
Likely species
Hatch timeline · todayPeak at 12pm
12pm(now) — Autumn Olive
Stage: On emergersApproach: Emerger or dryActivity: 51%
Also:Autumn Needle Fly32%Black Midge28%
Peak emergence window5 food groups active
Peak activity at 12pm — Autumn Olive (Autumn Olive, Peak emergence window)
Sub-surface · on the nymphunder the surface
Hatch predictions
Top nymph shown — see all 4 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 3 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Evidence
Survey-backed · regionalHigh confidence
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Through the year
0–3 scale · November 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
Mayfly (Green Drake)Hatch
2
2
Freshwater ShrimpHatch
2
3
3
3
3
3
3
3
3
3
3
2
CapererHatch
2
3
3
2
Brown SedgeHatch
2
3
3
3
2
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Brown Trout fly box
A chalk stream shrunk to its essentials — clear, weedy, and quick to spook. Fish rise freely to a small dry in the hatch windows; between them, the induced take earns its keep.
Local classics: Pheasant Tail Nymph·CDC Olive·Iron Blue Dun
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
The River Piddle near Trigon Farm, a chalk stream weir close to Wareham, Dorset. Terrain map
About this water
Crystal-clear spring-fed water with wild brown trout, prolific hatches, and the intimate scale that makes chalk stream fishing so absorbing.
- Chalk
Water quality (WFD)
- Ecology: Moderate
Water quality details
- Dissolved oxygen: High
- Ammonia (Phys-Chem): High
- pH: High
- Phosphate: High
- Temperature: High
EA (England) · GB108044010080
The full read · show the working · for Brown Trout · confidence 75%
How the 0 is built — score × weight = contribution
Temperature93 × 28%26.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time45 × 13%5.9
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 79
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
The dawn and dusk windows score higher than the midday lull.
Directions
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
Casting instructors near here
Booking & contacts
Clubs & associations
- Wessex Fly FishingDay tickets
Boards & regulators
At a glance
River Piddle is a chalk stream in Dorset, England. Its recorded elevation is about 36 m above sea level and the catchment geology is chalk. The species listed for this water is brown trout. The trout season is recorded as running from 1 April to 15 October. The grayling season is recorded as running from 16 June to 14 March. Best window recorded for anglers: May to September. Core methods listed: upstream nymph; dry fly; small wet fly. Level and flow data for this water is linked from 1 gauge. Its Water Framework Directive ecological status is recorded as moderate. Nearby waters in our listings include Wessex Fly Fishing at 7.0 km, River Frome (Dorset) at 17 km and River Allen (Dorset) at 19 km.