Bite forecast
Pick a lake, a species, and a date to see the hourly bite forecast and the day's overall rating.
Overall rating
Best window: 9 PM (Excellent · 90/100)
Est. water temp
81.5°F
v1 estimate from air temperature — not a sensor reading
Above Smallmouth Bass's 70-80°F range
Sun & moon
Vermilion Lake · 47.8641, -92.4191
Map data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors
Depth contours: Minnesota DNR survey
Species context
Good (78/100) for Smallmouth Bass: water is estimated at 81.5°F, above Smallmouth Bass's 70-80°F optimal range. Best window: Dusk -- boosts feeding activity by about 30%, one of their peak feeding windows. That hour also overlaps a minor solunar period. 29.92 inHg and falling pressure modeled about 5% above this fish's baseline. Light (5-10 mph) wind modeled about 15% above this fish's baseline.
Water temperature (81.5°F estimated) is doing the most for this score. The score gives up the most on solunar period — minor period, about 6 points below its best.
Water temperature: 81.5°F estimated
36 of 40 pts
Optimal range 70-80°F
Well supportedWater temperature governs a cold-blooded fish's metabolism, so it is the largest term in the model (Christie & Regier 1988). The figure is a thermal-lag estimate built from forecast air temperature and the time of year — not a sensor reading, and not this lake's actual measured water.
Light window: Dusk
25 of 25 pts
Boosts feeding activity by about 30%
Well supportedLow-light feeding windows are the strongest timing signal inside a single day. How much each window is worth is this species' own cited response, sourced in its model file, not a generic curve.
Solunar period: Minor period
9 of 15 pts
Not supported by testingPeer-reviewed testing of North American freshwater fisheries found no significant relationship between solunar values, lunar phase or lunar illumination and catch rates (SN Applied Sciences, 2023) — air temperature predicted catch better than any solunar table tested. It is shown because anglers expect it, and it is shown separately so you can discount it. Its weight is under owner review.
Barometric pressure: Falling
10 of 10 pts
Modeled about 5% above this fish's baseline
ContestedThe barometric effect is real to most anglers but small and contested in the literature — several of the species studies cited in this model report null results — so it carries one of the smallest weights here.
Wind: Light (5-10 mph)
10 of 10 pts
Modeled about 15% above this fish's baseline
Moderately supportedWind stacks forage on windward structure, but both the size and the direction of the effect depend on the species and the water, so it carries a modest weight.
Then the whole score is scaled
Season: Summer — ×1.00 (100% of the ungated score)
How catchable Smallmouth Bass are at this point in the year. This scales the whole score rather than competing with the factors above — a fish that is dormant this time of year cannot score well no matter how good the hour looks.
Weather front: No clear front — ×1.00 (100% of the ungated score)
A multi-hour frontal pattern read from the day's forecast trajectory. No front is classified today, so this changes nothing and the single-reading pressure factor above does its normal job.
Those five factors add up to 90 of 100 points, and the two multipliers above take that to 90. The weights are v1 tuning constants under owner review — they are shown here rather than hidden so you can weigh them against your own judgement.
What this score does not know
Conditions read from the National Weather Service as of Jul 29, 2026 at 4:56 PM CDT. Solunar periods and sun/moon times are computed, not fetched.
It's currently summer. Smallmouth Bass typically hold 20-40 ft deep this time of year -- at an estimated 81.5°F, this looks like a slower time of year to target them, since water temp is outside their optimal range.
20-40 ft
This is the seasonal depth band from the species model -- relative to this species' typical behavior, not this lake's actual structure. True depth relative to this lake's bottom contours needs lake bathymetry (tracked in issue #175).
Best times
Smallmouth Bass feed most actively at Dawn and Dusk, when activity runs about 21% above the daily average across all four light windows.
Boosts feeding activity by about 30%.
Suppresses feeding activity by about 30%.
Boosts feeding activity by about 30%.
Has no measurable effect on feeding activity.
Hour by hour
| Hour | Bite score | Rating | Light | Wind |
|---|---|---|---|---|
| 4 PM | 74 | Good | Day | 5 mph SW |
| 5 PM | 74 | Good | Day | 5 mph SW |
| 6 PM | 74 | Good | Day | 5 mph S |
| 7 PM | 74 | Good | Day | 5 mph S |
| 8 PM | 78 | Good | Day | 5 mph S |
| 9 PM | 90 | Excellent | Dusk | 5 mph S |
| 10 PM | 80 | Excellent | Night | 5 mph S |
| 11 PM | 80 | Excellent | Night | 5 mph S |