Best Fishing Times

Solunar theory, popularized by John Alden Knight in 1926, holds that fish (and game) are most active during specific periods governed by the position of the sun and moon. Major periods occur when the moon is overhead or directly underfoot. Minor periods occur at moonrise and moonset. Activity intensifies near new and full moons when lunar gravity is strongest.

The strongest fishing windows generally combine three factors: (1) a major or minor solunar period, (2) the dawn or dusk twilight, and (3) a few days surrounding the new moon or full moon. When all three line up, expect peak feeding activity. The 30–90 minutes after sunrise and before sunset are reliably productive even outside major periods.

Studies are mixed, but most experienced anglers report a perceptible difference. Lunar gravity influences tides, and lake fish — particularly walleye, bass, and muskies — appear to feed more aggressively in the days surrounding new and full moons. The effect is strongest at night and in low-light conditions.

Major periods last about 2 hours and are centered on lunar transit (moon at the meridian) and lunar opposition (moon directly underfoot, on the far side of Earth). Minor periods last about 1 hour and are centered on moonrise and moonset. Major periods generally produce stronger fishing activity than minor periods.

Sunrise and sunset times are computed using NOAA-equivalent astronomical formulas with accuracy of about ±2 minutes. Moonrise, moonset and lunar transit are computed using Meeus low-precision formulas with accuracy of about ±5 minutes at lat 30–60°N. Times on this preview are shown in Central Time (America/Chicago); each lake's own best-times page uses that lake's local time zone. All times adjust automatically for daylight saving.