San Juan Islands Weather and Climate

The San Juan Islands enjoy an average of 247 days with sunshine and about half the rainfall of Seattle, thanks to the "rain shadow" effect of the Olympic Mountains to the south. It's no wonder visitors are attracted to the islands year round! 7-day forecast...

San Juan Islands Live Image (Fisherman Bay, Lopez Island)

animated cams

IslandCam.com provides 24 hour, live camera coverage of the San Juan Islands including images of a number of the ferry parking lots.

 

Weather Averages in Fahrenheit and Inches

 

Month   High/Low   Precipitation
January   46/36   3.57
February   48/36   2.28
March   53/39   2.17
April   57/41   1.78
May   63/45   1.66
June   67/48   1.29
July   71/51   0.88
August   71/50   1.06
September   66/48   1.26
October   58/44   2.85
November   50/39   4.33
December   46/36   3.73