Freestone · Mixed · Michigan

Grand River

Wide view of the Grand River flowing over a low dam in downtown Grand Rapids, Michigan, with anglers wading in the current
Poor · Brown Trout
Hexagenia Dun · 4-8
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
  • Level0.44 mLast reading 19h ago
  • Water temp22.5°C
  • ClarityClear
Today's fly
HD
Hexagenia Dun4-8
High-confidence seasonal pick
Conditions on the water
Live gauge
Level
Steady
0.44 m
Last reading 19h ago
Water temp22.5°C
ClarityClear
Weather25°C
WindSW 17 km/h
Pressure1009 hPa
Rain · recent0.0 mm
Rain · ahead23.1 mm

Live readings — water temperature is an estimate where the gauge does not record it.

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
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 22.5°C. This is the line where catch-and-release kills brown trout. Do not fish for them today.
Hatch timeline · todayQuiet day

Hatch predictions

Today's headline hatch shown — see all 2 active hatches hour by hour with Pro.

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Beyond the hatch · worth watchingambient prey

Hatch predictions

Top prey shown — see all 3 with Pro.

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Evidence
ModelledModerate confidence

Modelled from regional ecology — no survey or occurrence data for this water yet.

Through the year
0–3 scale · July highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Quill GordonHatch
2
2
Blue QuillHatch
2
3
2
HendricksonHatch
2
2
Eastern March BrownHatch
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.
  • Michigan licence; verify MI DNR rules and any city-reach restrictions
  • Introduced, harvestable sport fishery.
What's coming
Plan ahead
5-day outlook
Cooler water nearby · 2
Probably above the Brown Trout safety line — these are likely cooler, but carry a thermometer.
Pere Marquette River
119 km
~16°C
Steelhead · Chinook salmon · Coho salmon
White River
71 km
~20°C
Steelhead · Chinook salmon · Coho salmon
Gallery · 2
  1. Wide view of the Grand River flowing over a low dam in downtown Grand Rapids, Michigan, with anglers wading in the current
    The Grand River near the fish ladder, Grand Rapids, Michigan
  2. Terrain map of the venue
    Terrain map
The full read · show the working · for Brown Trout · confidence 90%
How the 8 is built — score × weight = contribution
Temperature4 × 28%1.1
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time55 × 13%7.2
Pressure80 × 7%5.6
Insect activity59 × 12%7.1
Limiting factor: Water temperature (22.5°C) is outside Brown Trout's preferred range (10–16°C)= 56
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitymodelled from regional profilemodelled
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.
Related guides
Euro Nymphingsubsurface methods
Booking & contacts