30.12
tue
tue
Day
27°F
E 25 mph
Precip.
0%
0%
Night
27°F
E 21 mph
Precip.
0%
0%
31.12
wed
wed
Day
30°F
E 17 mph
Precip.
0%
0%
Night
32°F
NE 21 mph
Precip.
0%
0%
01.01
thu
thu
Day
28°F
SE 12 mph
Precip.
0%
0%
Night
25°F
E 10 mph
Precip.
0%
0%
02.01
fri
fri
Day
27°F
E 14 mph
Precip.
0%
0%
Night
28°F
E 9 mph
Precip.
0%
0%
03.01
sat
sat
Day
28°F
E 5 mph
Precip.
0%
0%
Night
27°F
SE 5 mph
Precip.
0%
0%
04.01
sun
sun
Day
28°F
S 11 mph
Precip.
0%
0%
Night
23°F
SW 7 mph
Precip.
0%
0%
05.01
mon
mon
Day
28°F
NW 5 mph
Precip.
0%
0%
Night
37°F
N 11 mph
Precip.
22%
22%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 46.2°F. The highest and lowest sea temperatures during the month were 50.7°F and 42.6°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 41.1°F. The highest and lowest sea temperatures during the month were 44.6°F and 38.3°F.
Air temperature in Groton, °F
Precipitation total in Groton, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Groton
Groton on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Groton
Local time: 18:19
December 30, tuesday
2100
27°F
E
23 mph
23 mph
December 31, wednesday
0000
27°F
E
21 mph
21 mph
0300
27°F
E
21 mph
21 mph
0600
27°F
E
17 mph
17 mph
0900
28°F
E
17 mph
17 mph
1200
30°F
E
17 mph
17 mph
1500
34°F
E
17 mph
17 mph
1800
34°F
NE
17 mph
17 mph
