Rules at a glance
- Free fishing
- Fly only
Water temperature for Brown Trout
Ideal14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Lombardy trout season — hatches build through spring afternoons, sedges carry summer evenings, and small dark flies matter into autumn. Flows track snowmelt and glacial melt through the warmer months, so expect a daily rhythm as much as a seasonal one.
Where
Long gravel runs and glides through the Valtellina floor, with better fish holding in the deeper seams and under the cut banks below the vineyard terraces.
Method
Upstream nymph through the faster water; dry fly or emerger in the glides once fish are looking up. No-Kill fly beats mandate single barbless hooks and artificials only — comply or fish elsewhere.
Kit
9 to 10 ft #5 for bigger freestone water than the Trentino rivers in this pack. Floating line, 12 ft leader to 4 to 5 lb fluoro. Wading staff useful on the smoother cobble sections.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Likely species
Mayflies
Mayflies- Anglers curse mayfliesMost likelyLower confidenceNearest relative#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
- Blue-winged oliveAlso possible#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Turkey BrownAlso possibleLower confidence#14–16 · DunSmall spring dun on slower glides and margins.
- Ephemera vulgata (lake mayfly)Also possibleLower confidenceNearest relative#8–10–12 · NymphLarge lake/slow-river mayfly; burrows soft sediment.
Caddisflies
Caddisflies- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Net-spinning caddis (S. Europe)Also possibleLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- GrannomAlso possibleNearest relative#14–16 · PupaPupa first, then dries as the adults come off.
- Stone-case caddisAlso possibleLower confidenceNearest relative#14–16–18 · NymphTiny stone-cased larva; clean gravel riffles.
Stoneflies
Stoneflies- Little Brown StoneMost likelyLower confidence#16–18 · AdultSmall dark stone nymph or adult in early spring.
- NeedleflyAlso possibleLower confidenceNearest relative#16–18 · AdultSmall slender stonefly; clean, cold headwater riffles.
Damselflies & dragonflies
Damselflies & dragonflies- DamselfliesMost likelyNearest relative#10–12 · NymphSlow-retrieve a damsel nymph along the weed edges.
- Migrant HawkerAlso possibleLower confidence#6–8 · NymphStrip a big hawker nymph erratically near cover.
Hatch timeline · todayPeak at 11h
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 4 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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
18-22 · Pattern
Upstream dry, in the film
Permits & access
Permit required — see local rules.
- Regional Lombardy fishing licence plus a seasonal or daily permit from the Unione Pesca Sportiva della Provincia di Sondrio (UPS) required
- Marble trout and hybrids must always be released
- No-Kill fly zones (Fascia A, B, D — blue signage) require artificial lures or flies, barbless hooks, and zero retention; Fascia C allows limited retention on artificials only
- Grayling may be retained in season subject to minimum size and a seasonal cap
- Confirm the current year's exact dates and zone boundaries at unionepescasondrio.it before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
The full read · show the working · for Brown Trout · confidence 90%
How the 84 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 84
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout varies_by_water → varies_by_water
- Grayling varies_by_water → varies_by_water
Grayling can be retained in season on the Adda main-stem (minimum 40cm, versus 35cm on other Sondrio waters) with a 15-fish seasonal limit and typically 1-2 per day depending on zone. Retention is banned outright in several defined stretches, including Adda from the Baghetto weir down to the start of the Piateda No-Kill zone — check the current UPS regulation for exact boundaries before keeping a fish.
Rules are set at province or association level — check locally.
- Marble trout varies_by_water → varies_by_water
Related guides
Booking & contacts
Adda (Valtellina)
Water temperature for Brown Trout
Ideal14°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Through the Lombardy trout season — hatches build through spring afternoons, sedges carry summer evenings, and small dark flies matter into autumn. Flows track snowmelt and glacial melt through the warmer months, so expect a daily rhythm as much as a seasonal one.
Where
Long gravel runs and glides through the Valtellina floor, with better fish holding in the deeper seams and under the cut banks below the vineyard terraces.
Method
Upstream nymph through the faster water; dry fly or emerger in the glides once fish are looking up. No-Kill fly beats mandate single barbless hooks and artificials only — comply or fish elsewhere.
Kit
9 to 10 ft #5 for bigger freestone water than the Trentino rivers in this pack. Floating line, 12 ft leader to 4 to 5 lb fluoro. Wading staff useful on the smoother cobble sections.
Why this works
Excellent — water temperature is right today, though insect activity could be better.
Likely species
Mayflies
- Anglers curse mayfliesMost likelyLower confidenceNearest relative#20–22 · SpinnerGo tiny: 20-22 spent spinner, single fly, long tippet.
- Blue-winged oliveAlso possible#16–18 · DunDuns are up; a sherry spinner fall may follow.
- Turkey BrownAlso possibleLower confidence#14–16 · DunSmall spring dun on slower glides and margins.
- Ephemera vulgata (lake mayfly)Also possibleLower confidenceNearest relative#8–10–12 · NymphLarge lake/slow-river mayfly; burrows soft sediment.
Caddisflies
- Green SedgeMost likelyLower confidenceNearest relative#10–12–14–16 · NymphFree-living green caddis larva; fast stony riffles.
- Net-spinning caddis (S. Europe)Also possibleLower confidenceNearest relative#12–14–16 · PupaWidespread riffle net-spinner; evening emergence.
- GrannomAlso possibleNearest relative#14–16 · PupaPupa first, then dries as the adults come off.
- Stone-case caddisAlso possibleLower confidenceNearest relative#14–16–18 · NymphTiny stone-cased larva; clean gravel riffles.
Stoneflies
- Little Brown StoneMost likelyLower confidence#16–18 · AdultSmall dark stone nymph or adult in early spring.
- NeedleflyAlso possibleLower confidenceNearest relative#16–18 · AdultSmall slender stonefly; clean, cold headwater riffles.
Damselflies & dragonflies
- DamselfliesMost likelyNearest relative#10–12 · NymphSlow-retrieve a damsel nymph along the weed edges.
- Migrant HawkerAlso possibleLower confidence#6–8 · NymphStrip a big hawker nymph erratically near cover.
Hatch timeline · todayPeak at 11h
Hatch predictions
Today's headline hatch shown — see all 12 active hatches hour by hour as a supporter.
Start free trial14-day free trial. Cancel anytime.
Sub-surface · on the nymphunder the surface
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 4 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 · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Evening SedgeHatch
2
3
3
3
2
Large Dark OliveHatch
1
2
2
1
Iron BlueHatch
1
2
2
2
2
2
2
1
Blue Winged OliveHatch
1
2
2
2
2
1
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
Ranked for today
Fly box · Brown Trout
18-22 · Pattern
Upstream dry, in the film
Permits & access
Permit required — see local rules.
- Regional Lombardy fishing licence plus a seasonal or daily permit from the Unione Pesca Sportiva della Provincia di Sondrio (UPS) required
- Marble trout and hybrids must always be released
- No-Kill fly zones (Fascia A, B, D — blue signage) require artificial lures or flies, barbless hooks, and zero retention; Fascia C allows limited retention on artificials only
- Grayling may be retained in season subject to minimum size and a seasonal cap
- Confirm the current year's exact dates and zone boundaries at unionepescasondrio.it before fishing.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Gallery · 2
Terrain map
The full read · show the working · for Brown Trout · confidence 90%
How the 84 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time70 × 13%9.1
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Conditions total= 84
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
Directions
Seasons & zones
- Trout varies_by_water → varies_by_water
- Grayling varies_by_water → varies_by_water
Grayling can be retained in season on the Adda main-stem (minimum 40cm, versus 35cm on other Sondrio waters) with a 15-fish seasonal limit and typically 1-2 per day depending on zone. Retention is banned outright in several defined stretches, including Adda from the Baghetto weir down to the start of the Piateda No-Kill zone — check the current UPS regulation for exact boundaries before keeping a fish.
Rules are set at province or association level — check locally.
- Marble trout varies_by_water → varies_by_water
Related guides
Booking & contacts