Chalk Stream · Chalk · Hampshire

River Whitewater

River Whitewater venue image
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The Whitewater is a Loddon tributary in northeast Hampshire — pure chalk water, spring-fed, clear enough to watch a trout inspect and reject your fly from twelve feet.

Poor · Brown Trout
Sherry Spinner · 14-16
Poorlive now
Not the day for it
Low and clear — careful approach country. A morning for the obvious fish only.
80% confidence
What moved it
  • Level0.09 mLast reading 6h ago
  • Water temp20.9°C
  • ClarityClear
Today’s fly
Sherry Spinner
Sherry Spinner14-16
Upstream dry, on top
Conditions on the water
Live gauge
Level
Steady
0.09 m
Last reading 6h ago
Water temp20.9°C
ClarityClear
Weather18°C
WindSW 13 km/h
Pressure1021 hPa
Rain · recent0.6 mm
Rain · ahead0.0 mm

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

Water temperature for brown trout
Warm — slow
20.9°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 20.9°C — above the brown trout caution line (18°C). Fish dawn or dusk only. Land it fast, wet hands, no air shots. Otherwise poor — water clarity is in the right range.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 5 active hatches hour by hour with Pro.

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Evidence
Survey-backed · regionalModerate confidence

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

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
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
Permits & access
Permit required — see local rules.
  • Private syndicate.
What's coming
Plan ahead
5-day outlook
Water here at 20.9°C. Nothing cooler within range.
Gallery · 1
  1. Terrain map of the venue
    Terrain map
About this water

The Whitewater is a Loddon tributary in northeast Hampshire — pure chalk water, spring-fed, clear enough to watch a trout inspect and reject your fly from twelve feet. Which it will. The chalk stream is an education in the gap between being good enough and being good enough on a particular day when the fish have decided to be particular about it; the Whitewater's trout have decided to be particular for as long as anyone can remember. Small water, almost entirely private syndicate. One of those rivers that makes you better at every other river you'll ever fish.

  • Chalk
The full read · show the working · for brown trout · confidence 80%
How the 22 is built — score × weight = contribution
Temperature15 × 28%4.2
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity52 × 12%6.2
Limiting factor: Water temperature (20.9°C) is outside Brown Trout's preferred range (10–16°C)= 59
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
  • Trout1 April → 30 September
Related guides
Chalkstream Playbookchalk stream tacticsTrout Near Londonaccess guideEuro Nymphingsubsurface methods
Booking & contacts