Solunar Feeding Times

Solunar Theory

Where Solunar Tables Come From

A Brief History

Solunar theory was popularized by John Alden Knight in his 1936 book Moon Up, Moon Down. Knight, a Pennsylvania fisherman and naturalist, noticed that his own catch rates correlated strongly with the position of the moon. Compiling decades of field observations from freshwater and saltwater anglers, he proposed that fish feeding activity peaked during four specific windows each day: two major periods when the moon is directly overhead or directly underfoot (moon transits), and two minor periods at moonrise and moonset.

Knight’s tables became a fixture in fishing almanacs. Every major outdoor publication now publishes some version. The underlying math has been refined since 1936 (we use Meeus-grade astronomy for exact moon transit times), but the fundamental framework remains what Knight described.

Major and Minor Periods

Major periods are the two windows per day when the moon is at its highest point above the horizon (upper transit) or at its lowest point below (lower transit). Each major period lasts approximately two hours, centered on the transit. Gravitational pull on water and, by extension, on the physiology of fish is at its daily peak during these windows.

Minor periods occur at moonrise and moonset, when the moon crosses the horizon. Each minor period lasts roughly an hour. Secondary, but still associated with elevated feeding activity compared to random times.

The four periods shift by roughly 50 minutes per day as the moon’s position advances in its orbit. That’s why a solunar table for today doesn’t apply to tomorrow.

Does Solunar Actually Work?

The honest answer is: the evidence is mixed. Formal scientific studies have produced inconsistent results. Some show measurable correlation between solunar peaks and catch rates; others find no effect once you control for weather and time-of-day. Individual species respond differently.

What’s more defensible: lunar phase demonstrably drives spring tides, which drive current and bait movement, which drives feeding. New moon and full moon periods produce objectively better fishing through that mechanism. Most charter captains use solunar as one input among several, not as the sole determinant of when to go.

If solunar says today is excellent and the tide, wind, and temperature are also working in your favor, you’re stacking probabilities. That’s the framework most serious anglers operate on.

Stacking the Odds: Solunar + Tide + Sun

The highest-probability fishing window of any given day is the one where three factors align:

1. A solunar major period is active. Moon is at upper or lower transit.
2. Water is moving. Ideally the first or last two hours of an incoming or outgoing tide, not slack.
3. Light conditions favor predators. Sunrise, sunset, or overcast low light.

The widget flags feeding periods as “prime” when they overlap with sunrise or sunset. Those are the windows serious anglers build their day around. A spring tide morning with a prime-flagged major period at sunrise is as close to a guaranteed bite window as saltwater fishing ever offers.

Day Rating Explained

Each day gets a 1-to-4 star rating based on lunar phase, which correlates with tide strength:

• 4 stars (Excellent): within 3 days of new moon or full moon. Spring tides, strongest current, most active feeding.
• 3 stars (Good): transitional days between phases. Solid fishing, moderate current.
• 2 stars (Fair): within 3 days of first or last quarter moon. Neap tides, weaker current, shorter windows.
• 1 star (Poor): quarter-moon peak, weakest current of the lunar cycle.

A 2-star day isn’t a reason to cancel. It’s a reminder that bite windows will be shorter and more concentrated at the prime overlaps.