San Juan Island National Historical Park
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San Juan Island at a glance
- Best time
- June–September
- Trip length
- 1–2 days
- Don't miss
- Tide Pooling at San Juan Island
- Nearby city
- Friday Harbor, WA
Explore this park
About San Juan Island National Historical Park
San Juan Island is well known for its splendid vistas, saltwater shores, quiet woodlands, orca whales and one of the last remaining native prairies in the Puget Sound/Northern Straits region. But it was also here in 1859 that the United States and Great Britain nearly went to war over possession of the island, the crisis ignited by the death of a pig.
Weather Information
- Spring
Temperatures usually range from 40 F to 60 F.
- Summer
Temperatures usually range from 45 F to 70 F.
- Fall
Temperatures usually range from 40 F to 65 F.
- Winter
Temperatures range from 35 F to 50 F.
Wildflowers are at their peak around May. On very sunny days, be prepared with water-heat exhaustion is a common complaint among park visitors who are unprepared. Rain is common. Be prepared with cold and wet weather gear and numerous layers if you intend to be outside. Rain and wind are common.
Operating Hours
Park grounds are open 24 hours per-day, year-round.
- MondayAll Day
- TuesdayAll Day
- WednesdayAll Day
- ThursdayAll Day
- FridayAll Day
- SaturdayAll Day
- SundayAll Day
Common questions
Planning San Juan Island National Historical Park
The summary above covers timing and highlights. These go deeper on reservations, crowds, and logistics — check Alerts for live updates.
Reservation rules vary by season and activity for San Juan Island. See Overview on this page for fees, timed entry, and campground details before you travel.
