The Cascade mountains and ocean tides shield the islands from cold, northerly winds. Therefore, Friday Harbor is a temporary orb from typical North American climates. The weather remains mild throughout the four seasons.

Summer is without a doubt Friday Harbor's busiest tourist season. The day time temperatures rarely rise above 80 º F and the ocean tides in this region maintain cool summer waters. The average water summer water temperature is 50 º.

The late summer and autumn seasons remain pleasantly dry until October. Winter snowfall is generally light and any spell is resolved within a couple of days. Nevertheless, the San Juan Islands receive approximately half the amount of year round precipitation as Seattle.

The January water temperature is 45 º and  the coldest of the year. Divers, kayakers, fisher and sailors likely know that this is actually quite warm water for January. Kayaking and fishing are common tourist activities on clear, winter days.

Spring is an equally mesmerizing season as any in Friday Harbor. There is a hint of chill in the morning air and the dewy mountain haze lifts from the valley. Pack a light sweater for an early morning hike . Bed & breakfast or hotel guests can likewise enjoy an outdoor experience with their meal on the patio or deck.