How Crowded Is San Juan Island National Historical Park in July?

July runs about 1.8× San Juan Island National Historical Park's average month, which makes it a very busy month here — roughly 15% of the park's yearly visitors come in July.

In a typical July the park sees about 64,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

It is the single busiest month of the year at San Juan Island; January, the quietest, runs only about 0.5× the average — a 4-to-1 swing between high and low season.

On our Best Time to Visit score July rates 51/100 ("Fair"), versus the top-rated April at 61/100 — best overall balance of crowds, weather and daylight.

Typical July weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 72°F and an overnight low around 50°F, with about 0.5" of precipitation.

That average of about 61°F is a comfortable range for hiking and being outdoors all day.

July falls inside the park's busiest stretch: June, July and August together pull about 42% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.

You'll have about 15.5 hours of daylight in July to explore — between the 8.1-hour midwinter low and the 15.9-hour summer high.

Park-wide, 2025 drew 420,922 recreation visits, up 3.7% from 405,925 in 2024.

Across the past decade overall visitation has risen about 68.5%, so a July visit is likely to feel busier than it did a few years ago.