Sucia Island

Island

Sucia Island is a horseshoe-shaped marine state park north of Orcas Island, celebrated as one of the finest boating destinations in the San Juans. Its wind- and water-sculpted sandstone formations, fossil-bearing bays, and half-dozen sheltered coves draw hundreds of boats each summer. There is no ferry, so it's accessible only by private boat or kayak.

Sucia Island Blakely Island Decatur Island Lopez Island Orcas Island San JuanIsland Shaw Island Stuart Island Sucia Island Waldron Island Friday HarborRoche HarborEastsoundMoran State ParkSucia Island
In this guide

Sucia Island essentials

Country: United States
Driest months: Jul-Sep
Pay in: Dollar ($)
Language: English

About Sucia Island

Sucia Island is a 564-acre marine state park made up of a curving, horseshoe of ridges enclosing a cluster of protected bays and coves. With extensive shoreline, docks, mooring buoys, and campsites spread across bays such as Echo, Fossil, Shallow, and Fox Cove, it is regularly ranked among the top boating and sea-kayaking destinations in the Pacific Northwest.

The island is geologically famous: its Chuckanut sandstone is honeycombed into dramatic wind-carved shapes and packed with plant and marine fossils, and Washington's only dinosaur fossil was discovered at Fossil Bay in 2012. Miles of trails wind past tafoni-pitted cliffs, tide pools, and viewpoints, making it a rewarding stop for hikers as well as mariners.

Things to Do

What to See at Sucia Island

  • Wind-sculpted Chuckanut sandstone formations and honeycomb tafoni cliffs
  • Fossil Bay, where Washington's only dinosaur fossil was discovered
  • Echo Bay, a large anchorage that fills with boats each summer
  • Shallow Bay and Fox Cove with sandy beaches and tide pools
  • Miles of shoreline hiking trails and viewpoints across the island
  • Sea kayaking, camping, and marine wildlife watching in sheltered coves
When to Go

Best Time to Visit Sucia Island

The boating season peaks from late spring through early fall, when weather is warmest and driest and drinking water is turned on at the bays. Summer weekends bring hundreds of boats to Echo Bay, so weekdays are calmer. Pacific Northwest winters are cold, wet, and windy, and open-water access becomes difficult.

Weather & Climate near Sucia Island

Climate

Temperate climate with mild summers (peaking in August) and cold winters (coldest in January). Temperatures range from 3°C to 21°C. Moderate rainfall (756 mm/year).

Air Quality: AQI 23 Good
Best Time to Visit
JulyAugustSeptember
Temperature & Rainfall
Temperature Range
32°
Warmest Month
-11°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor 3° - 8° 3° 107 mm overcast 88% 3.5 m/s 0.1 low 8.6h
February Acceptable 3° - 9° 3° 76 mm overcast 84% 3.3 m/s 0.2 low 10.0h
March Acceptable 4° - 11° 5° 61 mm overcast 83% 3.4 m/s 0.5 low 11.7h
April Acceptable 4° - 13° 7° 53 mm overcast 80% 3.2 m/s 0.9 moderate 13.5h
May Very Good 7° - 16° 12° 45 mm partly cloudy 77% 3.1 m/s 1.3 high 15.0h
June Very Good 9° - 18° 13° 38 mm partly cloudy 77% 3.1 m/s 1.6 very high 15.8h
July Excellent 11° - 20° 15° 25 mm some cloud 75% 3.0 m/s 1.8 very high 15.5h
August Excellent 11° - 21° 16° 29 mm some cloud 75% 2.8 m/s 1.4 high 14.1h
September Very Good 10° - 19° 14° 33 mm partly cloudy 79% 2.5 m/s 0.9 moderate 12.4h
October Acceptable 7° - 14° 11° 68 mm overcast 84% 2.7 m/s 0.4 low 10.7h
November Acceptable 4° - 11° 5° 122 mm overcast 87% 3.4 m/s 0.1 low 9.1h
December Poor 4° - 9° 3° 99 mm overcast 87% 3.6 m/s 0.1 low 8.2h
Getting There & Around

How to Get to Sucia Island

Sucia Island has no ferry service and is reached only by private boat, water taxi, or sea kayak, typically launching from Orcas Island or Anacortes. As a marine state park it offers docks, mooring buoys, and campsites across its several bays, with Echo Bay and Fossil Bay the busiest anchorages. Seasonal potable water is available at Fossil Bay from spring and at Echo and Shallow bays in summer.