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Harwich Port, Massachusetts

Community in Barnstable County, Massachusetts

Air quality

The air at Harwich Port

Index 29, good, led by ozone. Read at 9 AM from its reporting area, Cape Cod and Islands (MA), 15 miles off.

29Good
  • Ozone29Good26 ppb21.2 mi

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 30, good.

Smoke, the next 41 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Harwich Port

None in the last 24 hours; 0.06 in over the last 3 days, to Fri 8 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.06in

Visibility

How far you can see at Harwich Port, the next 41 hours

Dense fog: visibility falls to 0.1 miles Fri 3 PM, under a mile for 7 hours.

FriSat

On the radar over Harwich Port, MassachusettsReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Harwich Port, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now4 instruments

measured daily2 instruments

Harwich 0.8 SSWMA-BA-39

In a volunteer observer's own ground/0.8 mi away/47 ft/27 ft above here

precip, snowfall, snow depth

Rank-

Wpc FacilityHYSM3

At a cooperative observer's station/11.7 mi away/43 ft/23 ft above here

snowfall, snow depth, precip, high, low

Rank350of 744

Station report

The weather at Chatham Muni Arpt, drawn

The nearest airport reporting now, 4.3 mi from Harwich Port, Massachusetts. From its report of Oct 16, 2026, 9:52 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,800 ft; the ceiling is 2,800 ft; visibility 9 mi.

Section of the sky over Chatham Muni Arpt, height above the station to scale: overcast cloud with its base at 2,800 feet, the ceiling at 2,800 feet, and visibility of 9 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CQXFIG. A THE SKY OVER CHATHAM MUNI ARPTSECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,800 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,800 FTVISIBILITY, MILES: 9 MI0510TITLEChatham Muni Arpt, the skySTATION REPORT · ASOS CQXTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CQX-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

58.0 F with a dew point of 52.0 F, 80 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up; the lowest cloud reported is at 2,800 ft.

Chart of the air at Chatham Muni Arpt: temperature 58.0 degrees Fahrenheit and dew point 52.0, 80 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station, against the lowest cloud reported at 2,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CQXFIG. B THE AIR AT CHATHAM MUNI ARPTTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00040 F50 F60 F70 FSATURATES 1,400 FT ABOVE THE STATION, AT 50.6 FLOWEST CLOUD REPORTED, OVC 2,800 FTTEMPERATURE 58.0 FDEW POINT 52.0 FSPREAD 6.0 FRELATIVE HUMIDITY 80 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 POINTTITLEChatham Muni Arpt, the airSTATION REPORT · ASOS CQXTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CQX-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (170 degrees) at 9 mph, gusting 20 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 25 mph.

Plan of the wind at Chatham Muni Arpt, north up: blowing from 170 degrees, the south, at 9 miles an hour, gusting 20; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CQXFIG. C THE WIND AT CHATHAM MUNI ARPTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 170°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 MPH4MODERATE BREEZE135FRESH BREEZE19GUST, 20 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChatham Muni Arpt, the windSTATION REPORT · ASOS CQXTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CQX-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Chatham Muni Arpt, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Wpc Facility (HYSM3), 11.7 miles from here, read 15 Oct, 08:33. measured daily

Elsewhere in Massachusetts

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

Near Harwich Port

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

Near Harwich Port

River and lake gauges