Things to Do on San Juan Island in September

Can’t-Miss September Events

First Friday Art Walk (Downtown Friday Harbor) – Fri Sept 5, 4–7pm. Walkable galleries + shops. visitsanjuans.com
WaterWorks Gallery Showcase (Maria Michaelson & Glenn Hendrick) – Weekly Thu–Sat through Sept 27. visitsanjuans.com
SJIMA “Shapeshifters” – Thu–Mon through Sept 15, 11am–5pm. visitsanjuans.com
Climb San Juan – Couples Night – Tuesdays, 5pm–close (recurring through Dec 30). visitsanjuans.com
Climb San Juan – Youth Classes – Mon–Wed, 3:30–5:00pm (recurring through Dec 31). visitsanjuans.com
San Juan Building Association – 4th Annual Golf Tournament – Fri Sept 12 at San Juan Golf & Tennis Club (9-hole scramble; club calendar confirms date). sjgolfclub.comsanjuanba.com
San Juan Island Farmers Market (Brickworks) – Saturdays, 9:30am–1:30pm (through Oct). visitsanjuans.com

Still Open (and worth it)

Whale watching: Daily tours continue; peak humpback sightings run Aug–Oct. visitsanjuans.com
Kayak tours: Discovery Sea Kayaks & others operate September outings. Discovery Sea Kayaksvisitsanjuans.com

Local Weather: September at a Glance

Average highs trend from ~70°F early month to ~63°F late month; lows near 50°F. Expect increasing clouds later in the month; light rain possible. Weather Spark

2025 Outlook (San Juan Island)

With ENSO-neutral and muted long-range signals, plan for near-normal early-fall weather; any warm spells or drizzly weekends will be short-lived.

Plan Your Stay

Browse our vacation rentals hosted by Greg, Sybil & Katie—perfect bases in town or near parks.