Stuart Island Island

Boat-in marine-park island with a historic 1893 lighthouse

Stuart Island sits at the far northwestern edge of the San Juans, reached only by private boat or kayak. Its marine state park wraps around two protected harbors, Reid and Prevost, and trails lead to the 1893 Turn Point Lighthouse overlooking Haro Strait. It's a quiet, off-the-grid escape prized by boaters and paddlers.

Stuart Island

About Stuart Island#

Stuart Island is the westernmost of the ferry-less outer San Juan Islands, lying just short of the Canadian maritime border in Washington State. A marine state park encircles Reid Harbor and Prevost Harbor with docks, mooring buoys, campsites, and hiking trails, making it a favorite anchorage for boaters and sea kayakers exploring the Salish Sea.

The island's signature landmark is the Turn Point Light Station, built in 1893 on the western tip to guide shipping through busy Boundary Pass; the grounds are now part of the San Juan Islands National Monument. A small one-room schoolhouse museum and sweeping views of Haro Strait, the Gulf Islands, and passing orcas round out the island's low-key, self-reliant character.

What to See at Stuart Island#

  • Turn Point Lighthouse (1893) with sweeping views over Haro Strait
  • Reid Harbor and Prevost Harbor anchorages within the marine state park
  • Hiking trails linking the harbors to Turn Point across the island
  • Historic one-room Stuart Island schoolhouse and teacherage museum
  • Orca and marine-wildlife watching from the Turn Point bluffs
  • Quiet campsites and shoreline beaches for boaters and kayakers

How to Get to Stuart Island#

There is no Washington State Ferry to Stuart Island; it is reachable only by private boat, charter, or sea kayak. Most visitors arrive at Reid Harbor or Prevost Harbor, where the marine state park offers docks, mooring buoys, and a campground. From there, a hike of a little over a mile from the road junction leads to Turn Point Lighthouse. A daily permit is required to use the docks, buoys, or campsites.

Best Time to Visit Stuart Island#

Summer, roughly June through September, is the prime boating and camping season, with the warmest, driest Pacific Northwest weather and the lighthouse often staffed by volunteer docents. Harbors fill with boats on peak weekends, so weekdays are quieter. Winter access is difficult, with cold, wet, windy conditions and few facilities open.

Weather & Climate near Stuart Island#

Climate

Stuart Island's climate is classified as Warm-Summer Mediterranean - Warm-Summer Mediterranean climate with mild summers (peaking in August) and cold winters (coldest in January). Temperatures range from 4°C to 20°C. Moderate rainfall (676 mm/year).

Air Quality: AQI 21 Good
Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
32°
Warmest Month
-8°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 9°C and lows of 4°C. Significant rainfall (103 mm) and mostly overcast skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
87%
Humidity
Very Humid

Weather

103 mm
Rainfall
3.5 m/s
Wind
Light Breeze
0.1
UV Index
Low
8.6h daylight

February

February is cold with highs of 9°C and lows of 4°C. Moderate rainfall (71 mm) and mostly overcast skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
83%
Humidity
Very Humid

Weather

71 mm
Rainfall
3.4 m/s
Wind
Light Breeze
0.2
UV Index
Low
10.0h daylight

March

March is cold with highs of 10°C and lows of 4°C. Moderate rainfall (55 mm) and mostly overcast skies.

56 Acceptable

Comfort

Feels Like Cold
C
Temperature
10°
82%
Humidity
Very Humid

Weather

55 mm
Rainfall
3.5 m/s
Wind
Light Breeze
0.5
UV Index
Low
11.7h daylight

April

April is cold with highs of 13°C and lows of 5°C. Moderate rainfall (40 mm) and mostly overcast skies.

58 Acceptable

Comfort

Feels Like Cold
C
Temperature
13°
80%
Humidity
Very Humid

Weather

40 mm
Rainfall
3.3 m/s
Wind
Light Breeze
0.9
UV Index
Moderate
13.5h daylight

May

May is cool with highs of 15°C and lows of 8°C. Moderate rainfall (36 mm) and partly cloudy skies.

72 Very Good

Comfort

11°
Feels Like Cool
11°C
Temperature
15°
79%
Humidity
Very Humid

Weather

36 mm
Rainfall
3.3 m/s
Wind
Light Breeze
1.3
UV Index
High
15.0h daylight

June

June is cool with highs of 17°C and lows of 9°C. Moderate rainfall (31 mm) and partly cloudy skies.

72 Very Good

Comfort

13°
Feels Like Cool
13°C
Temperature
17°
78%
Humidity
Very Humid

Weather

31 mm
Rainfall
3.3 m/s
Wind
Light Breeze
1.6
UV Index
Very High
15.8h daylight

July

July is cool with highs of 19°C and lows of 11°C. The driest month with just 19 mm.

80 Excellent

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 19°
75%
Humidity
Very Humid

Weather

19 mm
Rainfall
3.1 m/s
Wind
Light Breeze
1.8
UV Index
Very High
15.5h daylight

August

August is cool with highs of 20°C and lows of 11°C. Light rainfall.

81 Excellent

Comfort

16°
Feels Like Cool
16°C
Temperature
11° 20°
74%
Humidity
Very Humid

Weather

23 mm
Rainfall
2.9 m/s
Wind
Calm
1.4
UV Index
High
14.1h daylight

September

September is cool with highs of 18°C and lows of 10°C. Light rainfall and partly cloudy skies.

77 Very Good

Comfort

14°
Feels Like Cool
14°C
Temperature
10° 18°
77%
Humidity
Very Humid

Weather

25 mm
Rainfall
2.6 m/s
Wind
Calm
0.9
UV Index
Moderate
12.4h daylight

October

October is cool with highs of 14°C and lows of 8°C. Moderate rainfall (63 mm) and mostly overcast skies.

55 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
14°
83%
Humidity
Very Humid

Weather

63 mm
Rainfall
2.8 m/s
Wind
Calm
0.4
UV Index
Low
10.7h daylight

November

November is cold with highs of 11°C and lows of 6°C. The wettest month with heavy rain (113 mm) and mostly overcast skies.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
11°
86%
Humidity
Very Humid

Weather

113 mm
Rainfall
3.5 m/s
Wind
Light Breeze
0.1
UV Index
Low
9.1h daylight

December

December is cold with highs of 9°C and lows of 5°C. Regular rainfall (97 mm) and mostly overcast skies.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
86%
Humidity
Very Humid

Weather

97 mm
Rainfall
3.6 m/s
Wind
Light Breeze
0.1
UV Index
Low
8.2h daylight

Nearby Attractions to Stuart Island#