In just three short lines, the speaker describes a life lived at night. They eat with owls, as if the birds were dinner companions, and when the weather is hot they "drink great drafts of moon." The title, "Nocturnal," tells us right away that this is a creature of darkness, and the speaker seems happy to count themselves among the night animals.
The best moment is the moon being something you can drink. Moonlight becomes a cool liquid, which fits the idea of relief on a sweltering night. The word "drafts" also suggests a long, satisfying swallow, so the speaker doesn't just look at the moon but takes it in.
The mood is calm, quiet, and a little magical. Nothing dramatic happens. Instead, the poem gives a feeling of belonging: the speaker is at ease in the dark, sharing it with wild company, and nourished by it. It reads like a small, refreshing secret about nighttime.