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Shaded-relief map of Roche Harbor, Washington: rivers, roads, the city limits and where the water drains.
WASHINGTON · SAN JUAN COUNTY

Roche Harbor

662 people, 90 ft above sea level in San Juan County.

90 ftElevation, city center
662People, 2024 estimate
4 sq miLand area
Sunny 54°
Sunny now Dew point 47° · SSE 17 mph · high 56°
City of Roche Harbor River Interstate 2 miles
Explore the plate Order a print

The Roche Harbor plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Roche Harbor

NWS forecast and National Blend of Models · updated 2:00 PM PST
RIGHT NOW Friday Harbor Airport (KFHR) · 1:53 PM
Sunny
54° Sunny Feels like 54° · high of 56° near 2 PM
WindSSE 17 mphgusts 26
Humidity77%falling to 72% this afternoon
Pressure29.61 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 47° · Dryabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Mostly cloudy
Tonight, about 9 PMin about 6 hours · 37% chance · rain
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 100.37 in · 4 dry days
ALERTS & OUTLOOKS
! Coastal Flood AdvisoryCoastal Flood Advisory issued November 14 at 11:40AM PST until November 15 at 12:00PM PST by NWS Seattle WA
! Wind AdvisoryWind Advisory issued November 14 at 10:05AM PST until November 15 at 4:00AM PST by NWS Seattle WA
NWS Seattle and the Storm Prediction Center · checked 2:47 PM
SUN & MOON
↑ 7:19 AM4:34 PM ↓
9 h 15 m of daylight, 3 minutes less than yesterday
Waxing crescent, 26% lit. Next full moon: Nov. 24.
AIR & POLLEN
30
GOODAir quality index · ozone
Tomorrow: None, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
mostly cloudy day
mostly cloudy night
rain
rain
windy
mostly cloudy night
mostly cloudy day
partly cloudy day
showers day
showers night
showers night
partly cloudy night
partly cloudy night
rain
rain
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
mostly sunny
TEMPERATURE °F
56°
50°
55°
45°
51°
42°
CHANCE OF RAIN
41% · 0.00 in Monday morning 50%
WIND, MPH
20
20
20
21
21
14
12
10
8
6
7
8
8
8
9
8
5
1
0
0
2
6
10
12
HOW IT FEELS · DEW POINT
Dry: dew points 41 to 48°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 51° / 40°
SAT Nov. 14 Chance of showers Chance of showers
56° 48°
40% rain — SE 20, gusts 37 A
SUN Nov. 15 Chance of showers Chance of showers
55° 42°
40% rain 0.01–0.09″ S 10, gusts 38 A
MON Nov. 16 Chance of showers Chance of showers
51° 39°
40% rain up to 0.1″ SSE 7 A
TUE Nov. 17 Mostly sunny Mostly sunny
51° 39°
10% rain — E 9 A
WED Nov. 18 Mostly cloudy Mostly cloudy
50° 39°
20% rain — N 9 A
THU Nov. 19 Partly cloudy Partly cloudy
49° 37°
0% rain — N 6 A
FRI Nov. 20 Partly cloudy Partly cloudy
49° 37°
10% rain — E 5 B
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Roche Harbor about 5,000 feet above the ground was over the Pacific north of Hawaii three days ago, and over the Pacific off the Northwest a day ago, about 1,240 miles back along its path. It feels dry all the same. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE2
THE GROUND

What Roche Harbor stands on

Roche Harbor’s center stands about 90 ft above sea level. Within three miles the land runs from 0 ft to 540 ft, a difference of 540 ft: hilly country. Open water lies within three miles. The highest named summit within 15 miles is False Summit, about 2,320 ft, 15 miles east-northeast.

Under the town center the state geologic map shows Triassic sedimentary rocks, undivided (limestone), from the Permian to Triassic, 202 to 299 million years old.

The section below crosses 5 rock units mapped at the surface.

Roche Harbor, cut in half from west to east

A section west to east, 24 miles through the town center
0 ft500 ft1,000 ft ROCHE HARBOR90 ftTurtleback Mountain1,530 ftOsprey Hill450 ft ← WE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 14×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Pre-Carboniferous intrusive rocks

Quartz-diorite. Age: Cambrian to Early Triassic, 247 to 542 million years old. About 3 mi of the line.

Triassic sedimentary rocks, undivided

Limestone. Age: Permian to Triassic, 202 to 299 million years old. About 2 mi of the line.

Devonian rocks

Andesite, dacite. Age: Devonian to Permian, 273 to 422 million years old. About 1 mi of the line.

Glacial drift, undivided

Sand, gravel. Age: Pleistocene, less than 2.6 million years old. About 1 mi of the line.

Pre-Tertiary sedimentary and metasedimentary rocks, undivided

Graywacke, argillite, phyllite. Age: Middle Jurassic to Eocene, 34 to 175 million years old. About 0.7 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
MILE3
THE WATER

Where Roche Harbor’s rain goes

Rain that falls on Roche Harbor runs straight into the Pacific Ocean.

FROM THE CENTER OF ROCHE HARBOR < 2 mi to the Pacific Ocean straight to the shore

Traced down the USGS NHDPlus V2.1 river network from the Census center point of Roche Harbor; river miles along the main stem, rounded.

MILE7
ON THE NETWORK

Around Roche Harbor on the Forecast Network

Neighboring plates

Bellingham WA · 32 MI 32 miles east Mount Vernon WA · 40 MI 40 miles east Seattle WA · 77 MI 77 miles southeast Bellevue WA · 83 MI 83 miles southeast Kent WA · 94 MI 94 miles southeast Tacoma WA · 99 MI 99 miles south
FORECASTCITY
Map of Roche Harbor, Washington. Explore the plate
WASHINGTON · SAN JUAN

Roche Harbor

662 people, 90 ft above sea level in San Juan County.

90 ftElevation
662People
4 sq miLand
Sunny 54°
SunnyDew point 47°
1

Today in Roche Harbor

NEXT 15 HOURS
Now mostly cloudy day 56° 0%
5p mostly cloudy night 55° 16%
8p mostly cloudy night 53° 23%
11p rain 51° 33%
2a windy 51° 21%
5a mostly cloudy night 51° 19%
Mostly cloudy
NEXT RAINTonight about 9 PM · 37%
→
Sat40%
Chance of showers Chance of showers
48
56
A
Sun40%
Chance of showers Chance of showers
42
55
A
Mon40%
Chance of showers Chance of showers
39
51
A
Tue10%
Mostly sunny Mostly sunny
39
51
A
Wed20%
Mostly cloudy Mostly cloudy
39
50
A
Thu0%
Partly cloudy Partly cloudy
37
49
A
Fri10%
Partly cloudy Partly cloudy
37
49
B
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
2

What Roche Harbor stands on

Roche Harbor’s center stands about 90 ft above sea level. Within three miles the land runs from 0 ft to 540 ft, a difference of 540 ft: hilly country. Open water lies within three miles. The highest named summit within 15 miles is False Summit, about 2,320 ft, 15 miles east-northeast.

Roche Harbor, west to east Roche Harbor90 ftOsprey Hill450 ft ← WE → 24 miles through the town center; vertical exaggeration about 27×. Colors: rock at the surface.
Elevation, center90 ft
Within 3 miles0 to 540 ft
Lie of the landHilly (540 ft of relief)
High point nearbyFalse Summit, 2,320 ft, 15 mi east-northeast
Rock at the surfaceTriassic sedimentary rocks, undivided
Its agePermian to Triassic, 202 to 299 million years old
3

Where the rain goes

< 2 mito the Pacific Oceanstraight to the shore

Rain that falls on Roche Harbor runs straight into the Pacific Ocean.