GROTON, CT 06340 Weather Forecast & Current Conditions

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GROTON, CT
Current Weather

3:56 AM EDT AUG 26, 2026
Clear
63°F
Feels Like: 64°F
Dewpoint: 61°F
Rel. Hum.: 93%
Visibility: 10 miles
Wind: N at 3 mph
Pressure: 30.02 inches
Last 72 hours

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GROTON, CT 06340
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Sunny. Highs in the upper 70s. Northwest winds around 5 mph, becoming southwest around 5 mph this afternoon.
TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 60s. Southwest winds around 5 mph.
THURSDAY
Partly sunny. A slight chance of showers in the afternoon. Humid with highs in the upper 70s. South winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 20 percent.
THURSDAY NIGHT
Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Humid with lows in the upper 60s. South winds 5 to 10 mph. Gusts up to 20 mph in the evening. Chance of rain 50 percent.
FRIDAY
Partly sunny. A chance of showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. Humid with highs in the upper 70s. Southwest winds around 5 mph. Chance of rain 50 percent.
FRIDAY NIGHT
Mostly cloudy. Lows in the lower 60s.
SATURDAY
Mostly sunny. Highs in the upper 70s.
SATURDAY NIGHT
Partly cloudy. Lows in the lower 60s.
SUNDAY
Sunny. Highs in the upper 70s.
SUNDAY NIGHT
Partly cloudy. Lows in the mid 60s.
MONDAY
Mostly sunny. Highs in the lower 80s.
MONDAY NIGHT
Partly cloudy. Lows in the upper 60s.
TUESDAY
Mostly sunny. Highs in the lower 80s.

Visible Weather Satellite
GROTON, CT 06340
Infrared Weather Satellite
GROTON, CT 06340
NEXRAD Weather Radar
GROTON, CT 06340

GROTON, CT 3 hourly weather forecast

weather forecast created  7:00 PM CDT  8/25/2026
Wednesday
26 AUG 2026
GROTON, CT 06340 weather forecast Day 1, 0 hours 2 AM 63° 63° Clear 0%

0% Thunder
( 0% severe)
NW   6 97% 62°
Low 60° GROTON, CT 06340 weather forecast Day 1, 3 hours 5 AM 61° 61° Clear NW   6 100% 61°
High 77° GROTON, CT 06340 weather forecast Day 1, 6 hours 8 AM 65° 65° Clear 0%

0% Thunder
( 0% severe)
NNW   5 87% 61°

Partly Cloudy



GROTON, CT 06340 weather forecast Day 1, 9 hours 11 AM 73° 73° Partly Cloudy SW   5 71% 63°
GROTON, CT 06340 weather forecast Day 1, 12 hours 2 PM 76° 78° Partly Cloudy 0%

0% Thunder
( 1% severe)
SW   8 64% 63°
GROTON, CT 06340 weather forecast Day 1, 15 hours 5 PM 76° 78° Clear SW   7 66% 64°
GROTON, CT 06340 weather forecast Day 1, 18 hours 8 PM 70° 70° Partly Cloudy 0%

0% Thunder
( 1% severe)
SSW   6 84% 65°
GROTON, CT 06340 weather forecast Day 1, 21 hours 11 PM 68° 68° Mostly Cloudy SW   5 93% 66°
Thursday
27 AUG 2026
GROTON, CT 06340 weather forecast Day 2, 0 hours 2 AM 67° 67° Mostly Cloudy 0%

0% Thunder
( 3% severe)
SW   3 97% 66°
Low 65° GROTON, CT 06340 weather forecast Day 2, 3 hours 5 AM 67° 67° Mostly Cloudy S   5 100% 67°
High 78° GROTON, CT 06340 weather forecast Day 2, 6 hours 8 AM 72° 72° Partly Cloudy 17%
RAIN
<.01 in
0% Thunder
( 6% severe)
S   7 90% 69°

Partly Cloudy



GROTON, CT 06340 weather forecast Day 2, 9 hours 11 AM 77° 79° Partly Cloudy S   12 76% 69°
GROTON, CT 06340 weather forecast Day 2, 12 hours 2 PM 78° 80° Partly Cloudy 9%

0% Thunder
( 12% severe)
S   14 74% 69°
GROTON, CT 06340 weather forecast Day 2, 15 hours 5 PM 76° 77° Mostly Cloudy S   12 79% 69°
GROTON, CT 06340 weather forecast Day 2, 18 hours 8 PM 72° 72° Mostly Cloudy 19%
RAIN
<.01 in
0% Thunder
( 23% severe)
S   9 90% 69°
GROTON, CT 06340 weather forecast Day 2, 21 hours 11 PM 71° 71° Mostly Cloudy S   8 93% 69°

GROTON, CT extended weather forecast

Friday
28 AUG 2026
Saturday
29 AUG 2026
Sunday
30 AUG 2026
Monday
31 AUG 2026
Tuesday
1 SEP 2026
Low 69° Low 60° Low 60° Low 66° Low 67°
High 84° High 77° High 81° High 81° High 84°
GROTON, CT 06340 weather forecast Day 3 GROTON, CT 06340 weather forecast Day 4 GROTON, CT 06340 weather forecast Day 5 GROTON, CT 06340 weather forecast Day 6 GROTON, CT 06340 weather forecast Day 7
Mostly Cloudy
65% Rain
Clear
13% Rain
Partly Cloudy
16% Rain
Mostly Cloudy
29% Rain
Partly Cloudy
45% Rain
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