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Old Mystic, Connecticut

Community in New London County, Connecticut

Air quality

The air at Old Mystic

Index 14, good, led by fine particles. Read at 12 AM from its reporting area, New London-Groton (CT), 3 miles off.

14Good
  • Fine particles (PM2.5)14Good5 mi
  • Ozone-3 ppb21.4 mi
  • Coarse particles (PM10)5Good5 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 51, moderate.

Smoke, the next 44 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Old Mystic

None in the last 3 days, to Fri 12 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 Old Mystic, the next 44 hours

Dense fog: visibility falls to 0.1 miles Fri 6 PM, under a mile for 5 hours.

FriSat

On the radar over Old Mystic, ConnecticutReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Old Mystic, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.

measured now4 instruments

New LondonNDBC-NLHC3

At a river or reservoir gauge/5.7 mi away/-/- ft from here

temp, wind, gust, humidity, pressure

Rank326of 375

measured daily2 instruments

Mystic 3.4 NWCT-NL-46

In a volunteer observer's own ground/0.9 mi away/183 ft/9 ft above here

precip, snowfall, snow depth

Rank11of 375

NorwichNRWC3

At a cooperative observer's station/10.7 mi away/33 ft/141 ft below here

snowfall, snow depth, precip, high, low

Rank29of 375

Station report

The weather at Groton/New London, drawn

The nearest airport reporting now, 5.0 mi from Old Mystic, Connecticut. From its report of Oct 15, 2026, 11:56 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 Groton/New London, 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 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 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 MORE0510TITLEGroton/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

The air

57.0 F with a dew point of 48.0 F, 72 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up.

Chart of the air at Groton/New London: temperature 57.0 degrees Fahrenheit and dew point 48.0, 72 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station; 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 STATION01,0002,0003,00030 F40 F50 F60 F70 FSATURATES 2,100 FT ABOVE THE STATION, AT 45.9 FTEMPERATURE 57.0 FDEW POINT 48.0 FSPREAD 9.0 FRELATIVE HUMIDITY 72 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-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (150 degrees) at 13 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 22 mph.

Plan of the wind at Groton/New London, north up: blowing from 150 degrees, the south southeast, at 13 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 150°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 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), 10.7 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Connecticut

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

Near Old Mystic

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

Near Old Mystic

River and lake gauges