Freestone · Limestone · Ryedale / North York Moors

River Rye

A three-arched stone bridge over the River Rye, surrounded by lush green riverside vegetation near Rievaulx, North Yorkshire.

Technical limestone river — clear alkaline water that demands the precision of a chalk stream with the fly choices of a northern river.

Poor · Brown Trout
Pheasant Tail Nymph · 14-16
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
  • Level0.08 mLast reading 23h ago
  • Water temp23.2°C
  • ClarityClear
Today's fly
Pheasant Tail Nymph
Pheasant Tail Nymph14-16
Upstream, sub-surface
Conditions on the water
Live gauge
Level
Steady
0.08 m
Last reading 23h ago
Water temp23.2°C
ClarityClear
Weather29°C
WindS 13 km/h
Pressure1021 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
23°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Olives April through May; Mayfly late May where it holds; sedges through summer evenings; small dark flies into October.
Where
Upper Rye through Ryedale is small intimate water; pool tails and the seams under alders. The middle river widens through Helmsley.
Method
Upstream dry to risers when olives or sedges are off; North Country spider on the swing in cooler water — Snipe and Purple, Partridge and Orange, Waterhen Bloa. Move upstream slowly, fish each lie properly.
Kit
9 ft #4 — Yorkshire freestone default. Floating line, 9 to 12 ft leader to 4 to 5 lb fluoro. Studded boots for slick stones.
Why this works
Water at 23.2°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 2 with Pro.

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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
1
Grayling seasonSeason
2
2
1
1
2
2
2
2
2
2
Daddy Long LegsHatch
2
3
2
GrannomHatch
2
2
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1

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

Ranked for today
Brown Trout fly box
North Country spider water

Clear alkaline water that asks for chalk-stream manners and northern flies. Fish the dry to risers, and keep the spiders small and sparse — these fish get a good long look.

Local classics: Waterhen Bloa·Greenwell's Spider·Partridge & Yellow
What's coming
Plan ahead
5-day outlook
Water here around 23°C. Nothing cooler within range — carry a thermometer.
Gallery · 2
  1. A three-arched stone bridge over the River Rye, surrounded by lush green riverside vegetation near Rievaulx, North Yorkshire.
    _DSC7440
  2. Terrain map of the venue
    Terrain map
About this water

Technical limestone river — clear alkaline water that demands the precision of a chalk stream with the fly choices of a northern river. Sight-fishing in shallow water where you can spot individual fish rising. Dry fly is primary when fish are up; spiders need to be smaller and sparser than on rougher water. Size matters here; #16–18 is standard. Less forgiving than the rougher Dales rivers but rewards technical excellence. Long-established club water (Ryedale Anglers) with some association stretches available.

  • Limestone
Water quality (WFD)
  • Ecology: Moderate
  • Chemical: Fail
What this classification means

EA waterbody 'Rye from River Seph to Holbeck' (GB104027068200) — the Ryedale main stem through Helmsley and Nunnington (Ryedale Anglers water; classifying sites at Rievaulx Bridge, Helmsley and Nunnington Road Bridge). Latest EA data (Cycle 3, 2022): Moderate 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 GB104027068220, which is the Riccal (a Rye tributary), not the main stem.

EA (England) · GB104027068200

The full read · show the working · for Brown Trout · confidence 90%
How the 2 is built — score × weight = contribution
Temperature1 × 28%0.3
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 (23.2°C) is outside Brown Trout's preferred range (10–16°C)= 55
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
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 → 30 September
  • Grayling 16 June → 14 March

    The Rye and its tributaries hold excellent grayling. Most water is club-managed — check local Yorkshire DA rules.

    Prime sport 1 September → 31 December

Sea trout: Variable seasonal (2026)

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