15.01
thu
thu
Day
41°F
NE 14 mph
Precip.
0%
0%
Night
27°F
E 20 mph
Precip.
0%
0%
16.01
fri
fri
Day
32°F
E 23 mph
Precip.
0%
0%
Night
34°F
NE 14 mph
Precip.
0%
0%
17.01
sat
sat
Day
36°F
NE 8 mph
Precip.
0%
0%
Night
36°F
E 10 mph
Precip.
0%
0%
18.01
sun
sun
Day
36°F
E 4 mph
Precip.
0%
0%
Night
30°F
S 21 mph
Precip.
100%
100%
19.01
mon
mon
Day
28°F
E 21 mph
Precip.
24%
24%
Night
25°F
E 20 mph
Precip.
0%
0%
20.01
tue
tue
Day
25°F
E 14 mph
Precip.
27%
27%
Night
14°F
SE 14 mph
Precip.
100%
100%
21.01
wed
wed
Day
12°F
E 17 mph
Precip.
22%
22%
Night
12°F
E 6 mph
Precip.
0%
0%
22.01
thu
thu
Day
25°F
NW 7 mph
Precip.
100%
100%
Night
14°F
SE 7 mph
Precip.
0%
0%
23.01
fri
fri
Day
27°F
NE 10 mph
Precip.
0%
0%
Night
37°F
NE 17 mph
Precip.
100%
100%
24.01
sat
sat
Day
39°F
NE 11 mph
Precip.
100%
100%
Night
34°F
SE 11 mph
Precip.
45%
45%
25.01
sun
sun
Day
14°F
SE 22 mph
Precip.
0%
0%
Night
1°F
SE 19 mph
Precip.
0%
0%
26.01
mon
mon
Day
5°F
SE 19 mph
Precip.
0%
0%
Night
10°F
SE 13 mph
Precip.
0%
0%
27.01
tue
tue
Day
27°F
E 17 mph
Precip.
0%
0%
Night
30°F
NE 10 mph
Precip.
0%
0%
28.01
wed
wed
Day
37°F
NE 8 mph
Precip.
0%
0%
Night
36°F
E 6 mph
Precip.
100%
100%
Sea water temperature in January, °F
Show year:
2026
2025
2024
The average sea water temperature in January of 2026 was 40.1°F. The highest and lowest sea temperatures during the month were 41.7°F and 38.7°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: 18:46
January 15, thursday
2100
30°F
E
17 mph
17 mph
January 16, friday
0000
27°F
E
20 mph
20 mph
0300
25°F
E
21 mph
21 mph
0600
23°F
E
21 mph
21 mph
0900
27°F
E
24 mph
24 mph
1200
32°F
E
23 mph
23 mph
1500
32°F
E
20 mph
20 mph
1800
32°F
NE
16 mph
16 mph
