San Juan

Welcome to San Juan, a Temperate island in the The Coastal Waters of Southeast Alaska and British Columbia, part of the majestic Pacific Ocean. This guide offers a comprehensive overview of what makes San Juan unique – from its geography and climate to its population, infrastructure, and beyond. Dive into the details:
- Geography and Size: Explore the island’s size and location.
- Climate and Weather: Weather patterns and temperature.
- Topography and Nature: Uncover the natural wonders of the island.
- Infrastructure and Travelling: Insights on reaching, staying, and making the most of your visit.
- News and Headlines: Latest News.
Geography and size of San Juan
Size: 145.5 km²
Coastline: 120.6 km
Ocean: Pacific Ocean
Sea: The Coastal Waters of Southeast Alaska and British Columbia
Continent: North America
San Juan is a Large Island spanning 146 km² with a coastline of 121 km.
Archipel: Alexander Archipelago – A group of about 1,100 islands off the southeast coast of Alaska, USA, known for their temperate rainforests and indigenous Tlingit culture.
Tectonic Plate: North America – Covers North America and parts of the Atlantic and Arctic Oceans, characterized by diverse geological features and varying levels of seismic activity.
The geographic heart of the island is pinpointed at these coordinates:
Latitude: 48.62128839 / Longitude: -123.18606226
Climate and weather of San Juan
Climate Zone: Temperate
Climate Details: Warm-Summer Mediterranean Climate
Temperature: Warm Summer
Climate Characteristics: Characterized by warm, dry summers and mild, wet winters, typical of coastal areas with abundant sunshine Rain is more common in the winter months, maintaining a moderate climate.
Topography and nature of San Juan
Timezone: UTC-08:00
Timezone places: America/Los_Angeles
Max. Elevation: 28 m
Mean Elevation: 21 m
Vegetation: Evergreen Needleleaf Forest
Tree Coverage: 72%
The mean elevation is 21 m. The highest elevation on the island reaches approximately 28 meters above sea level. The island is characterized by Plains: Flat, low-lying lands characterized by a maximum elevation of up to 200 meters. On islands, plains are typically coastal lowlands or central flat areas.
Dominating Vegetation: Evergreen Needleleaf Forest
Dominated by evergreen coniferous trees such as pines and firs, which retain their needle-like leaves throughout the year. These forests are often found in cooler climates. San Juan has a tree cover of 72 %.
Vegetation: 12 vegetation zones – Exceptionally Diverse Island
Islands with more than ten vegetation zones are among the most ecologically rich and varied in the world. These islands are akin to miniature continents, boasting an incredible array of ecosystems. The sheer range of habitats, from high peaks to deep valleys, rainforests to deserts, creates a mosaic of life that is unparalleled. They are crucial for conservation and ecological studies.
Infrastructure and Travelling to San Juan
Does the island have a public airport? yes.
San Juan has a public and scheduled airport. The following airports are located on this island: Friday Harbor Airport.
Does the island have a major port? yes.
San Juan is home to a major port. The following ports are situated on the island: FRIDAY HARBOR.
The mean population of San Juan is 59 per km². San Juan is Gently Populated. The island belongs to United States of America.
Continuing your journey, Shaw is the next notable island, situated merely km away.
United States of America is classified as Developed region: G7: Group of Seven – Major advanced economies, including Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States. The level of income is High income: OECD.
News – Latest Updates and Headlines from San Juan
Stay informed with the most recent news and important headlines from San Juan. Here’s a roundup of the latest developments.
- Friday Harbor Film Festival begins Oct. 22 - The Journal of the San Juan Islandson 21 October 2026
Friday Harbor Film Festival begins Oct. 22 The Journal of the San Juan Islands
- A San Juan Island Home for All Seasons - Seattle magazineon 20 October 2026
A San Juan Island Home for All Seasons Seattle magazine
- San Juan County sheriff’s log - Islands' Weeklyon 20 October 2026
San Juan County sheriff’s log Islands' Weekly
- Candidate forums: County Council and Auditor - The Journal of the San Juan Islandson 20 October 2026
Candidate forums: County Council and Auditor The Journal of the San Juan Islands
- How to help the Sears family after fire destroys home - San Juan Islanderon 19 October 2026
How to help the Sears family after fire destroys home San Juan Islander
- Jennifer Swanson for Council | Letter - The Journal of the San Juan Islandson 19 October 2026
Jennifer Swanson for Council | Letter The Journal of the San Juan Islands
- Structure fire destroys home on Yacht Haven Rd - San Juan Islanderon 17 October 2026
Structure fire destroys home on Yacht Haven Rd San Juan Islander
- San Juan County sheriff’s log - Islands' Sounderon 17 October 2026
San Juan County sheriff’s log Islands' Sounder
- October 17: Pumpkin Patch at Goose Hollow Farm – San Juan Island - San Juan Islanderon 17 October 2026
October 17: Pumpkin Patch at Goose Hollow Farm – San Juan Island San Juan Islander
- Merri Ann Simonson: San Juan Island and County real estate market summary - San Juan Islanderon 17 October 2026
Merri Ann Simonson: San Juan Island and County real estate market summary San Juan Islander
Please note: The data used here has been primarily extracted from satellite readings. Deviations from exact values may occur, particularly regarding the height of elevations and population density. Land area and coastline measurements refer to average values at mean high tide.
