25.05
mon
mon
Day
63°F
E 9 mph
Precip.
0%
0%
Night
59°F
E 6 mph
Precip.
0%
0%
26.05
tue
tue
Day
66°F
N 6 mph
Precip.
0%
0%
Night
55°F
NE 6 mph
Precip.
0%
0%
27.05
wed
wed
Day
68°F
NE 8 mph
Precip.
0%
0%
Night
61°F
SE 5 mph
Precip.
0%
0%
28.05
thu
thu
Day
68°F
SE 12 mph
Precip.
0%
0%
Night
54°F
SE 7 mph
Precip.
0%
0%
29.05
fri
fri
Day
63°F
E 7 mph
Precip.
0%
0%
Night
46°F
SE 10 mph
Precip.
0%
0%
30.05
sat
sat
Day
52°F
SW 17 mph
Precip.
78%
78%
Night
48°F
SW 8 mph
Precip.
0%
0%
31.05
sun
sun
Day
61°F
N 4 mph
Precip.
0%
0%
Night
54°F
NE 11 mph
Precip.
0%
0%
01.06
mon
mon
Day
66°F
SE 14 mph
Precip.
0%
0%
Night
55°F
SE 9 mph
Precip.
100%
100%
02.06
tue
tue
Day
64°F
NW 6 mph
Precip.
0%
0%
Night
54°F
E 6 mph
Precip.
0%
0%
03.06
wed
wed
Day
66°F
NE 9 mph
Precip.
0%
0%
Night
59°F
NE 7 mph
Precip.
100%
100%
04.06
thu
thu
Day
70°F
NE 7 mph
Precip.
100%
100%
Night
61°F
NE 8 mph
Precip.
100%
100%
05.06
fri
fri
Day
70°F
NE 12 mph
Precip.
0%
0%
Night
59°F
NE 7 mph
Precip.
0%
0%
06.06
sat
sat
Day
70°F
NE 11 mph
Precip.
0%
0%
Night
61°F
NE 10 mph
Precip.
100%
100%
07.06
sun
sun
Day
72°F
SE 12 mph
Precip.
0%
0%
Night
61°F
SE 11 mph
Precip.
0%
0%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 50.8°F. The highest and lowest sea temperatures during the month were 55.9°F and 46.2°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 60.9°F. The highest and lowest sea temperatures during the month were 64.8°F and 55.4°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: 21:56
May 26, tuesday
0000
59°F
E
6 mph
6 mph
0300
57°F
S
6 mph
6 mph
0600
57°F
S
6 mph
6 mph
0900
64°F
W
2 mph
2 mph
1200
66°F
N
6 mph
6 mph
1500
66°F
NE
7 mph
7 mph
1800
63°F
NE
7 mph
7 mph
2100
59°F
NE
7 mph
7 mph
