Tailwater · Mixed · Maine, US

Grand Lake Stream

A wide stretch of Grand Lake Stream with an angler fly fishing near the bank and a dam spillway in the distance
Today · Closed season
Czech Nymph
Forecast · Today
Closed season
Out of season. Try elsewhere.
90% projected
Today's fly
Czech Nymph
Czech Nymph
Conditions on the water · Today
Live gauge
Level
Falling
0.79 m
Dropping after lift
Water temp14.4°C
ClarityClearing
Weather7°C
WindN 18 km/h
Pressure1011 hPa
Rain · recent6.7 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 Brook Trout
Ideal
14°C est.ideal 10–16°C
0°14°28°

A dam sets this river's temperature, not the weather, so it can shift several degrees within hours when the release changes. It also warms as it runs away from the dam.

How to fish it · for Brook 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
Mayflies
Chironomids
Gammarids
Hatch timeline · todayPeak at 7h

12h(now) — Eastern Blue-Winged Olive

Stage: On emergersApproach: Emerger or dryActivity: 33%
Peak emergence window5 food groups active

Peak activity at 7h — Trico (Eastern) (Trico (Eastern), 3 food groups active)

Sub-surface · on the nymphunder the surface

Hatch predictions

Supporters see the full sub-surface read.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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Evidence
Records-basedModerate confidence

Based on species-occurrence records, not local invertebrate surveys.

Through the year
0–3 scale · October highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
1
SulphurHatch
2
3
2
Trico (Eastern)Hatch
2
3
3
2
Eastern Blue-Winged OliveHatch
2
3
3
3
3
3
3
3
2
Eastern Summer BWO (Drunella)Hatch
2
3
3
2

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

Ranked for today
Fly box · Brook Trout
Local fly shops: New England Fly Co.
Permits & access
Permit required — see local rules.
  • Fly-fishing-only with special-law bag/size limits — verify the current Maine DIFW Grand Lake Stream listing before relying on it
  • A small, pressured, low-clear water — finesse and care matter.
What's coming
Plan ahead
5-day outlook
Gallery · 2
  1. A wide stretch of Grand Lake Stream with an angler fly fishing near the bank and a dam spillway in the distance
    Grand Lake Stream, a famous landlocked salmon stream in Washington County, Maine
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brook Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature100 × 28%28.0
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time80 × 13%10.4
Pressure75 × 7%5.3
Insect activity68 × 12%8.2
Conditions total= 87
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 1 April → 30 September
Related guides
Euro Nymphingsubsurface methods
Booking & contacts