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Birch Bay, Washington

Community in Whatcom County, Washington

Air quality

The air at Birch Bay

Index 29, good, led by fine particles. Read at 6 PM from its reporting area, Custer (WA), 5 miles off.

29Good
  • Fine particles (PM2.5)29Good-
  • Ozone23Good-

The days ahead

Highest moderate, today, led by ozone. Yesterday measured 18, good.

Smoke, the next 41 hours

Little smoke near the ground through Sun 11 AM: the index from smoke stays at 6 or under.

FriSatSun

Precipitation

What has fallen at Birch Bay

None in the last 24 hours; 0.14 in over the last 3 days, to Fri 6 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.14in

Visibility

How far you can see at Birch Bay, the next 41 hours

Mist or haze: visibility falls to 3 miles Sat 2 AM.

FriSatSun

On the radar over Birch Bay, WashingtonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Birch Bay, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.1 miles away.

measured now4 instruments

measured daily2 instruments

BlaineBLNW1

At a cooperative observer's station/4.7 mi away/59 ft/16 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Bellingham INTL, drawn

The nearest airport reporting now, 13.5 mi from Birch Bay, Washington. From its report of Oct 16, 2026, 6:53 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Bellingham INTL, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BLIFIG. A THE SKY OVER BELLINGHAM INTLSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEBellingham INTL, the skySTATION REPORT · ASOS BLITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-BLI-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

57.0 F with a dew point of 47.0 F, 69 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,300 ft up.

Chart of the air at Bellingham INTL: temperature 57.0 degrees Fahrenheit and dew point 47.0, 69 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BLIFIG. B THE AIR AT BELLINGHAM INTLTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 F70 FSATURATES 2,300 FT ABOVE THE STATION, AT 44.7 FTEMPERATURE 57.0 FDEW POINT 47.0 FSPREAD 10.0 FRELATIVE HUMIDITY 69 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEBellingham INTL, the airSTATION REPORT · ASOS BLITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-BLI-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (160 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Bellingham INTL, north up: blowing from 160 degrees, the south southeast, at 5 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BLIFIG. C THE WIND AT BELLINGHAM INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 160°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBellingham INTL, the windSTATION REPORT · ASOS BLITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-BLI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Bellingham INTL, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Washington

23 places, each with its own forecast and its own instruments.

Near Birch Bay

The nearest places, each with its own forecast and the instruments nearest it.

Near Birch Bay

River and lake gauges