18.03
wed
wed
Day
34°F
S 7 mph
Precip.
0%
0%
Night
30°F
N 5 mph
Precip.
0%
0%
19.03
thu
thu
Day
36°F
N 7 mph
Precip.
0%
0%
Night
36°F
NE 7 mph
Precip.
0%
0%
20.03
fri
fri
Day
43°F
NE 6 mph
Precip.
0%
0%
Night
41°F
NE 13 mph
Precip.
100%
100%
21.03
sat
sat
Day
46°F
SW 6 mph
Precip.
0%
0%
Night
43°F
NW 1 mph
Precip.
0%
0%
22.03
sun
sun
Day
46°F
NE 10 mph
Precip.
0%
0%
Night
45°F
NE 11 mph
Precip.
0%
0%
23.03
mon
mon
Day
39°F
S 15 mph
Precip.
100%
100%
Night
34°F
NW 11 mph
Precip.
46%
46%
24.03
tue
tue
Day
36°F
SW 10 mph
Precip.
100%
100%
Night
32°F
E 5 mph
Precip.
0%
0%
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 36.6°F. The highest and lowest sea temperatures during the month were 39.7°F and 33.8°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 44.6°F. The highest and lowest sea temperatures during the month were 48.9°F and 42.1°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: 17:30
March 18, wednesday
1800
34°F
N
9 mph
9 mph
2100
32°F
N
6 mph
6 mph
March 19, thursday
0000
30°F
N
5 mph
5 mph
0300
30°F
N
4 mph
4 mph
0600
30°F
N
2 mph
2 mph
0900
32°F
NW
5 mph
5 mph
1200
36°F
N
7 mph
7 mph
1500
39°F
N
9 mph
9 mph
