Herron Island

Island

A private Puget Sound community served by a small ferry, Herron Island sees cottage owners, boaters and swimmers using sandy beaches, trails and moorings for weekend recreation.

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In this guide

Herron Island essentials

Website: herronisland.org
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About Herron Island

Herron Island is a privately owned residential island in Puget Sound, Washington State, United States. It functions as a small, year-round community with privately managed services.

The island contains docks, a community center and residential lots, and it is primarily used by residents and their guests rather than as a public recreation destination. Roads and common facilities are maintained by the island’s community organization.

The island was developed in the 20th century as a private residential community and has been managed by an owners’ association responsible for services, docks and ferry operations. Its development pattern reflects private island subdivision and community governance.

Herron Island sits in south Puget Sound and is reached by the island’s private ferry from the mainland; it lies among the smaller islands south of Seattle and is part of the broader Puget Sound island network.

  • Private community and ferry: Access is by the island’s privately operated ferry and landing, and ownership and services are administered by a community association that manages common facilities.
When to Go

Best Time to Visit Herron Island

Best in summer for community events, boating and warm weather; spring and autumn are quieter.

Summer
June-August · 15-25°C
Warm, dry weather for swimming and boating; community events are most active in July and August.
Late spring
May-June · 10-18°C
Wildflowers and calmer waters; docks are less crowded.
Autumn
September-October · 8-16°C
Fewer visitors and crisp air; good for introspective walks along the shore.

Weather & Climate near Herron Island

Climate

Temperate climate with mild summers (peaking in August) and cold winters (coldest in January). Temperatures range from 1°C to 24°C. Abundant rainfall (1310 mm/year), wettest in December.

Air Quality: AQI 23 Good
Temperature & Rainfall
Temperature Range
24°
Warmest Month
1°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January - 1° - 8° 2° 192 mm - - 3.4 m/s - -
February - 2° - 10° 3° 160 mm - - 3.4 m/s - -
March - 2° - 12° 5° 145 mm - - 3.5 m/s - -
April - 4° - 15° 7° 93 mm - - 3.5 m/s - -
May - 6° - 18° 12° 56 mm - - 3.4 m/s - -
June - 8° - 20° 14° 42 mm - - 3.4 m/s - -
July - 10° - 23° 17° 24 mm - - 3.4 m/s - -
August - 11° - 24° 17° 29 mm - - 3.1 m/s - -
September - 9° - 21° 15° 54 mm - - 2.9 m/s - -
October - 6° - 16° 11° 104 mm - - 2.9 m/s - -
November - 4° - 11° 5° 203 mm - - 3.5 m/s - -
December - 2° - 8° 2° 208 mm - - 3.5 m/s - -
Getting There & Around

How to Get to Herron Island

Herron Island is reached via a small ferry that connects to the mainland (Gugo Road/Case Inlet area). Ferry schedules and access rules are managed by the Herron Maintenance Company-consult the island’s official site for landing rules and membership information.

Tips for Visiting Herron Island

  • Herron Island is a members' island community-secure access permission or stay with a resident; day access without invitation is limited.
  • Bring exact change for the island's small security/landing fees if arriving by private boat; local procedures can be cash-based.
  • Respect community rules-Herron Island has active stewardship and quiet-hour policies enforced by residents.