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Groton Long Point, Connecticut

Borough in New London County, Connecticut

Air quality

The air at Groton Long Point

Index 24, good, led by fine particles. Read at 9 AM from its reporting area, New London-Groton (CT), 3 miles off.

24Good
  • Fine particles (PM2.5)24Good4.7 mi
  • Coarse particles (PM10)11Good4.7 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 10, good.

Smoke, the next 42 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 Groton Long Point

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

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Groton Long Point, the next 42 hours

Dense fog: visibility falls to 0.2 miles Fri 1 PM, under a mile for 2 hours.

FriSat

On the radar over Groton Long Point, ConnecticutReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Groton Long Point, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now4 instruments

New LondonNDBC-NLHC3

At a river or reservoir gauge/6.1 mi away/-/- ft from here

temp, wind, gust, humidity, pressure

Rank326of 375

measured daily2 instruments

Groton 2.9 ECT-NL-45

In a volunteer observer's own ground/1.0 mi away/19 ft/13 ft above here

precip, snowfall, snow depth

Rank-

NorwichNRWC3

At a cooperative observer's station/15.0 mi away/33 ft/27 ft above here

snowfall, snow depth, precip, high, low

Rank29of 375

Station report

The weather at Groton/New London, drawn

The nearest airport reporting now, 2.5 mi from Groton Long Point, Connecticut. From its report of Oct 16, 2026, 8:56 AM local time: 3 of its 6 sheets.

The sky

Broken at 2,100 ft, overcast at 3,300 ft; the ceiling is 2,100 ft; visibility 7 mi.

Section of the sky over Groton/New London, height above the station to scale: broken cloud with its base at 2,100 feet, overcast cloud with its base at 3,300 feet, the ceiling at 2,100 feet, and visibility of 7 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GONFIG. A THE SKY OVER GROTON/NEW LONDONSECTION, 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 3,300 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,100 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 2,100 FTVISIBILITY, MILES: 7 MI0510TITLEGroton/New London, the skySTATION REPORT · ASOS GONTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-GON-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

63.0 F with a dew point of 60.0 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up; the lowest cloud reported is at 2,100 ft.

Chart of the air at Groton/New London: temperature 63.0 degrees Fahrenheit and dew point 60.0, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station, against the lowest cloud reported at 2,100 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GONFIG. B THE AIR AT GROTON/NEW LONDONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATES 700 FT ABOVE THE STATION, AT 59.3 FLOWEST CLOUD REPORTED, BKN 2,100 FTTEMPERATURE 63.0 FDEW POINT 60.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLEGroton/New London, the airSTATION REPORT · ASOS GONTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-GON-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (190 degrees) at 14 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Groton/New London, north up: blowing from 190 degrees, the south, at 14 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GONFIG. C THE WIND AT GROTON/NEW LONDONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 190°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 14 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGroton/New London, the windSTATION REPORT · ASOS GONTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-GON-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Groton/New London, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Norwich (NRWC3), 15.0 miles from here, read 16 Oct, 07:00. measured daily

Elsewhere in Connecticut

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

Near Groton Long Point

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

Near Groton Long Point

River and lake gauges