National Weather Service Forecast for: Groton CT
Issued by: National Weather Service New York, NY
Updated: 3:27 pm EDT Jun 8, 2025
 
This
Afternoon
This Afternoon: A 20 percent chance of showers. Partly sunny, with a steady temperature around 65. East wind around 10 mph.
Slight Chance
Showers
 Tonight

Tonight: A 20 percent chance of showers. Mostly cloudy, with a low around 59. East wind around 9 mph.
Slight Chance
Showers
 Monday

Monday: A 20 percent chance of showers. Mostly cloudy, with a high near 64. East wind around 11 mph.
Slight Chance
Showers
 Monday
Night
Monday Night: A 30 percent chance of showers, mainly after 2am. Cloudy, with a steady temperature around 62. East wind 6 to 8 mph.
Chance
Showers
 Tuesday

Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Cloudy, with a high near 66. East wind around 7 mph becoming south in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely
 Tuesday
Night
Tuesday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 61.
Chance
Showers
 Wednesday

Wednesday: Sunny, with a high near 73.
Sunny
 Wednesday
Night
Wednesday Night: Clear, with a low around 64.
Clear
 Thursday

Thursday: Sunny, with a high near 77.
Sunny
Hi 65 °F Lo 59 °F Hi 64 °F Lo 62 °F Hi 66 °F Lo 61 °F Hi 73 °F Lo 64 °F Hi 77 °F

 

This Afternoon
 
 A 20 percent chance of showers. Partly sunny, with a steady temperature around 65. East wind around 10 mph.
Tonight
 
 A 20 percent chance of showers. Mostly cloudy, with a low around 59. East wind around 9 mph.
Monday
 
 A 20 percent chance of showers. Mostly cloudy, with a high near 64. East wind around 11 mph.
Monday Night
 
 A 30 percent chance of showers, mainly after 2am. Cloudy, with a steady temperature around 62. East wind 6 to 8 mph.
Tuesday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Cloudy, with a high near 66. East wind around 7 mph becoming south in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
 
 A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 61.
Wednesday
 
 Sunny, with a high near 73.
Wednesday Night
 
 Clear, with a low around 64.
Thursday
 
 Sunny, with a high near 77.
Thursday Night
 
 Partly cloudy, with a low around 63.
Friday
 
 Partly sunny, with a high near 73.
Friday Night
 
 Mostly cloudy, with a low around 60.
Saturday
 
 A 30 percent chance of showers. Mostly cloudy, with a high near 66.
Saturday Night
 
 A 40 percent chance of showers. Mostly cloudy, with a low around 58.
Sunday
 
 A chance of showers. Partly sunny, with a high near 66.

 

Forecast from NOAA-NWS for Groton CT.