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Green Harbor, Massachusetts

Community in Plymouth County, Massachusetts

Air quality

The air at Green Harbor

Index 43, good, led by fine particles. Read at 12 AM from its reporting area, North Bristol-Plymouth (MA), 17 miles off.

43Good
  • Fine particles (PM2.5)43Good18.6 mi
  • Ozone22Good28 ppb18.6 mi

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 30, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 8 PM.

SatSun

Precipitation

What has fallen at Green Harbor

0.36 in in the last 24 hours, 0.41 in over the last 3 days, to Fri 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.36in
Last 3 days
0.41in

Visibility

How far you can see at Green Harbor, the next 45 hours

Visibility stays 5 miles or more through Sun 8 PM, lowest 6 miles Sat 4 AM.

SatSun

On the radar over Green Harbor, MassachusettsReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Green Harbor, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now4 instruments

MarshfieldGHG

At an airfield/2.2 mi away/11 ft/4 ft above here

temp, wind, gust, visibility, precip, pressure

Rank398of 747

measured daily2 instruments

Marshfield 2.7 EMA-PL-86

In a volunteer observer's own ground/1.4 mi away/30 ft/23 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Marshfield, drawn

The nearest airport reporting now, 2.2 mi from Green Harbor, Massachusetts. From its report of Oct 17, 2026, 12:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 4,600 ft; the ceiling is 4,600 ft; visibility 10 mi or more.

Section of the sky over Marshfield, height above the station to scale: overcast cloud with its base at 4,600 feet, the ceiling at 4,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GHGFIG. A THE SKY OVER MARSHFIELDSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,600 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 4,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMarshfield, the skySTATION REPORT · ASOS GHGTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-GHG-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

60.8 F with a dew point of 57.2 F, 88 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up; the lowest cloud reported is at 4,600 ft.

Chart of the air at Marshfield: temperature 60.8 degrees Fahrenheit and dew point 57.2, 88 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station, against the lowest cloud reported at 4,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GHGFIG. B THE AIR AT MARSHFIELDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00050 F60 F70 FSATURATES 800 FT ABOVE THE STATION, AT 56.3 FLOWEST CLOUD REPORTED, OVC 4,600 FTTEMPERATURE 60.8 FDEW POINT 57.2 FSPREAD 3.6 FRELATIVE HUMIDITY 88 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 POINTTITLEMarshfield, the airSTATION REPORT · ASOS GHGTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-GHG-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 6 mph, gusting 12 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 12 mph.

Plan of the wind at Marshfield, north up: at 6 miles an hour, gusting 12; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GHGFIG. C THE WIND AT MARSHFIELDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE8GUST, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMarshfield, the windSTATION REPORT · ASOS GHGTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-GHG-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Mci (Mass. Correctional Institution) (BRGM3), 17.5 miles from here, read 16 Oct, 08:00. measured daily

Elsewhere in Massachusetts

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

Near Green Harbor

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

Near Green Harbor

River and lake gauges