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Roche Harbor, WA
Full City Profile · Washington · San Juan County County
2.9
/5.0
C+
Fair
700
Population
174/sq mi density
$91,625
Median Income
$78,345 per capita
$927,000
Home Value
$842,566 Zillow
$1,500
Median Rent
24.0% income on rent
51°F
Avg Temperature
274 sunny days/yr
143
Violent Crime/100K
2,562 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$91,625 median income, 0.0% unemployment
F
Affordability
1.0 / 5.0
$927,000 home value, $1,500/mo rent
F
Safety
1.0 / 5.0
143 violent crimes/100K
A+
Education
5.0 / 5.0
55.9% bachelor's degree or higher
Roche Harbor experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 42°F in January while summers reach 61°F in July. The area gets 274 sunny days per year. Annual precipitation totals 18.5 inches. Air quality is rated Good with a median AQI of 28.
Temperature
42°F Jan (6°C)
61°F Jul (16°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 42°F (6°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 274 days/yr |
Geography
| Elevation | 173 ft (53 m) |
| Area | 4.0 sq mi (10.4 km²) |
| Population Density | 174/sq mi |
| Coordinates | 48.6074°N, 123.1306°W |
| Timezone | America/Los_Angeles |
| County | San Juan County County |
| Nearest Airport | Bellingham International (BLI) 30 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 35.4 / 100 |
| Social Vulnerability | 61.0 / 100 |
| Community Resilience | 95.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
| Tsunami | Very Low |
| Volcano | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 38.0 m (125 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2007 | CHEHALIS LAKE, CHILLIWACK | Meteorological | 38.0 m | — | 126 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | — | 73 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | — | — | 83 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Baker (99 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 99 km |
| Garibaldi | Stratovolcano | 2,678 m (8,786 ft) | -8060 | 139 km |
| Garibaldi Lake | Volcanic field | 2,316 m (7,598 ft) | Unknown | 148 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 159 km |
| Cayley Volcanic Field | Volcanic field | 2,375 m (7,792 ft) | Unknown | 169 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 3.8 in | |
| February | 42°F (6°C) | 2.6 in | |
| March | 44°F (7°C) | 2.1 in | |
| April | 48°F (9°C) | 1.6 in | |
| May | 53°F (11°C) | 1.4 in | |
| June | 57°F (14°C) | 1.2 in | |
| July | 61°F (16°C) | 0.8 in | Warmest, Driest |
| August | 61°F (16°C) | 0.9 in | |
| September | 58°F (14°C) | 1.0 in | |
| October | 50°F (10°C) | 2.3 in | |
| November | 44°F (7°C) | 4.2 in | Wettest |
| December | 41°F (5°C) | 3.7 in | Coldest |
Roche Harbor has a seasonal temperature swing of 21°F / from 41°F in December to 61°F in July. Total annual precipitation is 25.5 inches, with November being the wettest month (4.2") and July the driest (0.8").