A plain solunar table only knows the moon. The LakeQuality Fishing Forecast starts there and adds what actually decides where and how fish bite on Marsh Lake — factors we measure rather than guess:
- Water clarity — Marsh Lake's Secchi reading flips the playbook between clear-water finesse and stained-water reaction baits, and sets the low-light bite window.
- Trophic state & depth — nutrient level and max depth set the summer weedline and whether the lake stratifies, which tells you how deep to fish.
- Water-body type — natural lake vs. reservoir changes the structure that holds fish.
- Species & season — each species' spawn-temperature window and seasonal movements, matched to the lake's estimated water temperature.
- Sun & moon — the solunar major/minor periods and dawn/dusk twilight in the calendar below.
The species outlook is a transparent heuristic weighting of these established factors, and it now also factors in today's live conditions — wind, cloud cover, and the barometric (pressure) trend, recomputed for the current day. It's not a validated catch predictor, and water temperature is still an estimate from season and latitude unless a recent USGS gauge reading exists. It's the analysis a solunar table can't do, grounded in Marsh Lake's real, measured water quality.
Major periods (≈2 hours) are centered on lunar transit (when the moon is highest in the sky) and lunar opposition (when the moon is directly underfoot). These are typically the strongest feeding windows.
Minor periods (≈1 hour) are centered on moonrise and moonset. They're secondary windows that often produce well — especially when they coincide with sunrise or sunset.
Day rating combines moon phase (peak near new and full moons, when lunar gravity is strongest) with the overlap of major periods and the dawn/dusk twilight. A 4–5 star day stacks all three.
At Marsh Lake (lat 45.03°N), the longest day of the year is around June 21 with 15h 37m of daylight. The shortest is around December 21 with 8h 46m. Plan summer trips around the early-morning bite (as early as 5:00 AM) and the long evening window before sunset.