June and July are the best months. The days are nearly endless — the sun barely clears the horizon at midsummer before climbing again — the puffins are nesting on the grassy clifftops south of the village, and the mountain road over the pass is at its greenest. The gorge is dramatic in any weather, but a calm morning is the only time you can safely descend the stone steps to the boat landing at the bottom.
August is still good, with slightly shorter days and the start of autumn colour on the hillsides. Spring — April and May — is cold and very windy but often clear, with the mountains in sharp relief and very few other visitors.
Avoid November through February unless you are after Atlantic storms and solitude. The road over the pass can close in winter, and the village shuts down almost entirely. The Gjáargarður guesthouse typically closes between October and March.