An owl appearing in a dream traditionally signals wisdom and a kind of knowing that works best in low light -- intuition rather than analysis. Owls see what others miss, so the dream may point to insight you're picking up on beneath a situation's surface, even if you can't yet explain it logically. A watching owl often means it's time to trust a quiet hunch over a loud argument.
The rising of the Sun and the indiscrete glances interrupt the spirituality of the nocturnal celestial bodies. - Picatrix (Andalusia, ~1000.AD)