InshoreIQ
Angler Education · 1/2
Fishing Intelligence Series
What is a Solunar Period
and why does it matter?
The moon controls more than the tides. It controls when fish feed. Here's the science behind one of inshore fishing's most powerful secrets.
📖 The Science
In 1926, biologist John Alden Knight noticed fish and wildlife activity peaked at predictable times — aligned with the moon's position overhead and underfoot. He called these windows "Solunar periods."
The moon's gravitational pull affects atmospheric pressure and water movement, triggering feeding frenzies in fish that evolved to hunt during these windows.
Major Period
~2 HRS · 2× PER DAY
Moon is overhead or underfoot. Strongest feeding window. This is when you want your line in the water.
Minor Period
~1 HR · 2× PER DAY
At moonrise and moonset. Good secondary window — useful when major periods fall at night.