• American Camp parade ground looking west

    San Juan Island

    National Historical Park Washington

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  • American Camp Visitor Center on Summer Schedule

    The American Camp visitor center is open 8:30 a.m. to 5 p.m. daily through September 1. Grounds remain open daily from dawn to 11 p.m More »

  • English Camp Visitor Contact Station on Summer Schedule

    The English Camp visitor contact station in the Royal Marine Barracks is open 9 a.m. to 5 p.m., daily through September 1. Grounds are open daily from dawn to 11 p.m.

Weather

Weather Chart

The weather on San Juan Island is extremely variable. Visitors should come prepared for a wide range of conditions. Rain gear and layered clothing are essential.

Overall, the San Juan Archipelago has a moderate marine climate with pleasant summers and mild, wet winters.

Summers tend to be fair and warm, with high temperatures between 65 and 75 degrees F. July, August and September are the driest months, with heavier precipitation during the rest of the year.

While winters are mild at lower elevation, with temperatures in the 30's and 40's, snowfall can be heavy during some winter storms.

At any time of year, visitors should come prepared for a variety of conditions. The Seattle office of the National Weather Service provides up-to-date weather information and forecasts.

Did You Know?

Did You Know?

James Alden, commander of the USCS Steamer Active, carried dispatches during the Pig War crisis. During the Battle of Mobile Bay he led the Union fleet into the harbor until stalled by Confederate mines. That's when Admiral David G. Farragut shouted "Damn the torpedoes..."