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Weather in the San Juan Islands
and Gulf Islands

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Some 450 islands dot the San Juan and Gulf Islands archipelago. Hundreds more lead north to Desolation Sound and Princess Louisa Inlet. These islands of the Salish Sea are shielded from ocean storms by 300 mile-long Vancouver island. And they lie in the rain shadow of Washington's Olympic Mountains. The result? Sunny, protected, line-of-sight cruising among picturesque, forested islands.

People often think of rain when they think of the Pacific Northwest, but because of the rain shadow the islands receive much less rain than you'd think! As with most places some years are wetter and some drier, but overall the San Juan Islands receive about 1/2 the rain as Seattle and experience an average of 247 sunny days per year. Summer temperatures are generally in the low to mid 70s and winter temperatures in the high 30s or low 40s. Visit our local weather trends page for a compilation of data.

Local Area Weather Links

Local Weather Trends

Current Local Forecast

Bellingham Bay Camera

San Juan Islands Cameras

Caribbean Learn-n-Cruise: Catamaran or Monohull Spring Guided Flotilla: 10-day Sunshine Coast Spring Guided Flotilla: 21-day Desolation Sound & Princess Louisa Summer Guided Flotilla: 7-day San Juan Islands & Gulf Islands Summer Guided Flotilla: 7-day San Juan Islands & Victoria Late Summer Guided Flotilla: 14-day Victoria, Vancouver, San Juans & Gulf Islands Fall Guided Flotilla: 14-day Desolation Sound
February 2018 May 2 - 11, 2018 May 12 - June 1, 2018 June 23 - 29, 2018 June 30 - July 6, 2018 Aug 25 - Sept 7, 2018 Sept 22 - Oct 5, 2018
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