While Seattle might be famous for its rainfall—averaging about 40 inches of precipitation each year—you’ll find that life in the San Juan Islands is noticeably drier. Our archipelago receives roughly half the annual rainfall of other parts of the Pacific Northwest, and it’s all thanks to a fascinating weather phenomenon called a rain shadow.
Rain Shadow Definition: Let’s Clear This Up
A rain what?
Though searching for “what is a rain shadow?” yields plenty of technical definitions, the term simply refers to a relatively dry area on the downwind side of a mountain range.
If that’s still a little confusing, think of it this way: In our slice of the PNW, the Olympic Mountains act like nature’s giant umbrella. Moist air moves in from the Pacific Ocean and rises as it encounters the mountains. As the air climbs, it cools, forms clouds, and releases much of its moisture as rain on the western (or “windward”) side of the range.
By the time that air makes its way over the mountains and reaches us, most of its moisture is gone. In a sense, the rain clouds get “stuck” on the mountains surrounding us, meaning islanders often get to enjoy weather that’s sunnier, drier, and warmer than many of their neighbors.
The Rain Shadow of Washington—and the San Juan Islands—Are Famous For
When people talk about the rain shadow Washington is known for, they’re usually referring to either the Cascade Rain Shadow or, in our neck of the woods, the Olympic Rain Shadow.
Curious to see exactly how it works? This rain shadow Washington map provides an easy-to-understand look at the dry zone created by the Olympic Mountains. Luckily for us, San Juan Island sits in this sweet spot, meaning there’s truly never a bad time of year to visit Lakedale. Whether you’re arriving with Fido or your kiddos (or both) in tow, we’ve got you covered with things to do, places to nosh, and plenty to explore in all kinds of weather—even in winter.
Why Is a Rain Shadow a Good Thing?
If your island exploration itinerary includes spending plenty of time outdoors (and really, why wouldn’t it?), then a rain shadow is a very good thing.
The San Juan Islands’ naturally drier climate means more opportunities to enjoy hiking, fishing, paddleboarding, whale watching, and so much more—without constantly checking the forecast. And at Lakedale Resort, with 82 acres of SJI beauty to soak in, it’s easy to fill your day with just about any outdoor activity you can imagine, then end it on a high note with spectacular lakeside sunset views.
Being in a rain shadow obviously doesn’t mean the San Juans are rain-free. (A gray, drizzly day is still one of the hallmarks of life in the Pacific Northwest!) At the same time, the rain shadow creates a distinctive climate for us. It’s one reason our island home can feel like a welcome escape from the wetter weather found in other PNW destinations from Seattle to Olympic National Park and beyond.
Something Old, Something New (And a Sunnier Wedding for You)
The Olympic Rain Shadow is also a pretty nice perk for couples tying the knot at Lakedale. And while no one—not even us—can promise perfect wedding-day weather, a San Juan Island nuptials means the odds are a little more in your favor when it comes to exchanging outdoor vows, snapping golden-hour selfies, and celebrating under a starry sky.
Experience Mountain-Made Weather Magic at Lakedale
When the forecast calls for clouds and rain across the region, remember that San Juan Island is likely enjoying a little sunshine of its own—making Lakedale Resort the perfect home base for getting outside and soaking up the best that island life has to offer.
We’re here no matter what the weather may bring. Book your stay online or give us a call at 800-617-2267 to nab your spot today!
Sunrise hike to Sol Duc Falls in the Olympic Mountains