Weather for Stevensville, MT:
Current Conditions: Sunny, 57°F (14°C)
Daily Forecast:
- Monday, August 25: Low: 55°F (13°C), High: 90°F (32°C), Description: Sun through high clouds
- Tuesday, August 26: Low: 54°F (12°C), High: 88°F (31°C), Description: Increasing cloudiness
- Wednesday, August 27: Low: 59°F (15°C), High: 79°F (26°C), Description: Mostly cloudy
- Thursday, August 28: Low: 55°F (13°C), High: 77°F (25°C), Description: Cloudy with a thunderstorm in parts of the area in the afternoon
- Friday, August 29: Low: 48°F (9°C), High: 82°F (28°C), Description: Partly sunny with a thundershower in spots in the afternoon
- Saturday, August 30: Low: 49°F (9°C), High: 84°F (29°C), Description: Mostly sunny
- Sunday, August 31: Low: 47°F (8°C), High: 85°F (29°C), Description: Mostly sunny”
Western Montana Fishing Report – Week of August 25, 2025
Rivers Covered: Bitterroot • Blackfoot • Clark Fork • Rock Creek
Brought to you by Lightweight Fly Shop – Stevensville, MT
Weather Outlook & Best Fishing Window
The week brings hot summer weather, with highs climbing to the low 90s°F and cooling off into the mid-50s°F through the night—ideal for early fly time. Stick to morning sessions only; hoot-owl restrictions are active in many sections from 2 p.m. until midnight, so plan your day accordingly.
River-by-River Detailed Report
Bitterroot River
- Current Conditions: Flow remains low (~440 cfs at Darby), and midday water temperatures are climbing—hot enough to stress trout.
(turn0search0) - Fishing Trends: Dry-dropper setups remain very productive, with Chubby Chernobyls, Water Walkers, Henneberry Hoppers, and low-profile attractors like Plan B, Hop-Drop-And-Roll, and various foam ants proving effective. Early-season Trico spinners are showing sporadic activity—Twiggy and Sparkle Flag patterns are prime for picky risers. Streamer tactics (Sparkle Minnows, Kreelex, Overcoats) continue to score between hatches.
Hoppers and stoneflies also remain top choices, especially early. - Hoot-Owl Alert: Restrictions active on the entire river—fish only before 2 p.m.
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Blackfoot River
- Current Conditions: Flows are low (~330 cfs near Bonner) with water in the mid-to-upper 60s°F.
(turn0search3) - Fishing Trends: Terrestrials dominate—from Water Walkers and Chubby Chernobyls to Hoppers. Underneath, try Pat’s Rubberlegs, TJ Hookers, Prince Nymphs, or Perdigons. Streamer action remains reliable, especially early or under cloud cover—Sparkle Minnows, Kreelex, and Lil Kim still triggering strikes.
- Hoot-Owl Alert: The entire mainstem is closed from 2 p.m.–midnight. Early start is essential.
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Clark Fork River
- Current Conditions: Upstream hoot-owl restrictions are in place; midday temps remain elevated, with morning conditions best for bites.
(turn0search2) - Fishing Trends: Anglers report success with hopper-dropper systems, plus nocturnal stonefly imitations and flashy streamers in shaded, deeper runs.
- Hoot-Owl Alert: Upper sections are under 2 p.m.–midnight closure.
Rock Creek
- Current Conditions: Upper sections are under hoot-owl restrictions due to heat and low flow.
(turn0search2) - Fishing Trends: Traditional dry-dropper tactics still deliver—Micro Chubbies, Hippie Stompers, PMD Sparkle Duns, with Prince or tungsten jig nymphs beneath. Approach quietly; fish are chain-deep in fast, oxygenated pockets.
Hoot-Owl Restrictions Summary
| River | Section Affected | Closure Hours |
|---|---|---|
| Bitterroot | Entire River | 2 p.m. – Midnight |
| Blackfoot | Entire Mainstem | 2 p.m. – Midnight |
| Clark Fork | Upper Section | 2 p.m. – Midnight |
| Rock Creek | Upper Section | 2 p.m. – Midnight |
Fly Box for the Week
Bitterroot:
- Chubby Chernobyl, Water Walker, Henneberry Hopper, Plan B, Foam Ant, Twiggy or Sparkle Flag (Trico)
Blackfoot:
- Water Walker, Chubby Chernobyl, Pat’s Rubberlegs, TJ Hooker, Sparkle Minnow
Clark Fork:
- Hopper-dropper combinations, nocturnal stonefly, streamers (Sparkle Minnow, Kreelex)
Rock Creek:
- Micro Chubby, PMD Sparkle Dun, Tungsten jig nymphs (e.g., Prince)
Gear Picks from Lightweight Fly Shop
- Rods: EVOs & Technica—perfect for light, delicate presentations in low water
- Indicators: Oros Strike Indicators—easy to customize on-the-fly
- Sunglasses: Bajío polarized—for clarity in bright light
- Leaders/Tippet: Airflo & Rio—for stealthy presentations in clear, low water
Plan Your Week
Make the most of that sweet morning bite with a half or full-day guided trip on the Bitterroot or Blackfoot. Then, retreat to one of our cozy cabins—just minutes from the river—to relax between sessions.
Reserve today: lightweightflyshop.com








