Mid-summer · Weather & things to do
San Juan Island in July
San Juan Island sees its driest month, with just 0.7 in (18 mm) of rain, highs of 70°F (21°C) and lows of 56°F (13°C).
At 95/100 for comfort (the top score of the year), it's one of the best months to visit.
- Avg high
- 70°F (21°C)
- Avg low
- 56°F (13°C)
- Rain
- 0.7 in (18 mm)
- Humidity
- 75%
- Cloud cover
- 44%
- Daylight
- ~15 h 32 min
- Comfort score
- 95/100 · Great
What July feels like
Days are mild at around 70°F (21°C): comfortable for walking all day, with a layer for the evening.
Nights cool to an average low of 56°F (13°C).
It's one of the drier stretches, with only about 0.7 in (18 mm) of rain.
Long days help: there are roughly 15 h 32 min of daylight mid-month.
Plan around July
July is one of San Juan Island's best months on the climate data.
- Comfort improves from 87/100 in June to 95/100.
- July sits inside the May – Sep window our Puget Sound Islands route recommends.
What to pack for July
- A warm layer for eveningsnights drop to 56°F
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in San Juan Island in July
With conditions on your side, the picks below favor time outside.
Lime Kiln Point State Park
Lighthouse shoreline known as one of the best places to see orcas from land.
Why now Our curated notes say it's best summer afternoon.
Whale watching from Friday Harbor
Boat tours to find orcas, humpbacks and minke whales in Haro Strait.
Why now Our curated notes say it's best May–Sep.
San Juan Island Brewing Company
Brewpub two blocks from the ferry with pizzas and a patio.
Why now July scores 95/100 for comfort, good conditions for being outside.
San Juan Islands Sculpture Park
Over 100 sculptures along trails at Roche Harbor.
Why now Highs near 70°F and 0.7 in of monthly rain make this an easy outdoor pick.
Roche Harbor
Historic marina village with a flag ceremony at sunset in summer.
Nearby in July
- Victoria in July~18 mi · highs 70°F, 0.7 in rain · similar daytime temperatures, about as wet
- Vancouver in July~52 mi · highs 75°F, 2.0 in rain · 3°C (5°F) warmer by day, wetter
- Olympic NP in July~57 mi · highs 59°F, 1.2 in rain · 6°C (11°F) cooler by day, about as wet
- Bainbridge Island in July~67 mi · highs 75°F, 0.7 in rain · 3°C (5°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
San Juan Island in July: quick answers
Is July a good time to visit San Juan Island?
Yes. On the climate data it's one of the best months, scoring 95/100. Expect highs of 70°F (21°C) and 0.7 in (18 mm) of rain. July is inside the May – Sep window our Puget Sound Islands route recommends.
How hot is San Juan Island in July?
Average highs are 70°F (21°C) and average lows 56°F (13°C), making it the 2nd-warmest month by daytime highs.
Does it rain a lot in San Juan Island in July?
Not much: about 0.7 in (18 mm) of rain falls across July on average, the driest month of the year. The annual total is about 39.0 in (991 mm).
What should I pack for San Juan Island in July?
Bring a warm layer for evenings (nights drop to 56°F) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on San Juan Island
Routes in season in July
- Puget Sound Islands May – Sep
Planning San Juan Island in July?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.