Best Time to Visit Kauai for Ideal Weather and Shoulder Season Savings
At Tunnels Beach on Kauai’s North Shore, whether you can actually get in the water depends almost entirely on when you show up. From May through mid-October, the reef here produces some of the steadiest snorkeling conditions in Hawaii. From December through March, north swells can push waves to 15–25 feet at nearby Hanalei Bay — and swimming restrictions on North Shore beaches are common. That seasonal contrast, more dramatic on Kauai than on any other major Hawaiian island, is the central planning decision this guide covers. Kauai recorded approximately 1.42 million visitor arrivals in 2025, up 3.9% from