Best Time to Visit Puʻukoholā Heiau

Puʻukoholā Heiau National Historic Site is a National Historic Site in HI and one of the system's hidden, low-traffic units, drawing about 28,000 recreation visits in 2024. Visitation has eased over the past decade, down about 66%. Crowds concentrate sharply by season: February is the busiest month at about 1.3× the park's average month, while September is the calmest at roughly 0.8× — a 2-to-1 swing between high and low season. Roughly 23% of the year's visitors arrive in the three summer months of June, July and August alone, so timing a trip outside that window is the single biggest lever on how crowded the park feels. Weather swings from an average high-season warmth near 82°F in August down to about 75°F in January, with the wettest stretch in January. About 7 months a year see comfortable average temperatures in the 50–80°F range, which is part of why crowd timing and weather timing don't always line up. The sweet spot is September: pleasant weather with noticeably thinner crowds (shoulder season). Visit then and you trade a little peak-season certainty for noticeably shorter lines and easier parking than the February rush. Daylight ranges from about 10.8 hours in midwinter to 13.2 hours near the summer solstice, which shapes how much ground you can cover in a day. These crowd figures are drawn from 1979–2025 of National Park Service visitor-use records, paired with 1991–2020 NOAA climate normals, and are updated as new monthly data is released.