Solunar Theory

Category: Conditions

Solunar theory proposes that fish and wildlife activity levels are influenced by the position and phase of the moon and sun, creating predictable periods of increased feeding activity. Developed by John Alden Knight in 1926, the theory identifies four activity periods each day: two major periods (approximately 2 hours each, occurring when the moon is directly overhead or directly underfoot) and two minor periods (approximately 1 hour each, occurring when the moon is rising or setting). Major periods during a new or full moon are considered the strongest feeding windows. While solunar theory's scientific basis is debated, its practical correlation with fishing success is well-documented by decades of catch records. The theory is most useful as one factor among many — solunar data combined with weather conditions, barometric pressure, water temperature, and seasonal patterns provides a more complete picture of fishing potential than any single factor alone. Many experienced anglers plan their fishing days around major solunar periods, particularly during the new and full moon phases, and report measurably better catch rates during these windows. Solunar tables are widely available in fishing apps and published annually in fishing almanacs.