Measurements:
°C
°F
CURRENT WEATHER
13:58
Groton
62°F
NW 7 mph
Feels like: 62°F
Precip: 100%
World Resorts USA Groton Weather

7 Day Weather Forecast

05.14
thu
DAY
60°F
NW 9 mph
precip
100%
NIGHT
52°F
SE 3 mph
precip
77%
05.15
fri
DAY
56°F
S 9 mph
precip
100%
NIGHT
48°F
E 6 mph
precip
0%
05.16
sat
DAY
62°F
NE 12 mph
precip
0%
NIGHT
56°F
NE 8 mph
precip
0%
05.17
sun
DAY
64°F
E 8 mph
precip
100%
NIGHT
60°F
S 5 mph
precip
0%
05.18
mon
DAY
66°F
NW 9 mph
precip
0%
NIGHT
52°F
NW 6 mph
precip
0%
05.19
tue
DAY
64°F
N 8 mph
precip
0%
NIGHT
58°F
NE 7 mph
precip
0%
05.20
wed
DAY
70°F
NE 11 mph
precip
0%
NIGHT
58°F
SE 10 mph
precip
100%

Groton Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Groton was 11.3°F. The maximum and minimum values were 8.9°F and 13.1°F respectively.

Groton on the Weather Map

Best Time to Visit Groton
The most sunny months:
November 17 days
October 14 days
December 13 days
The most warm months:
July 83.2 °F
August 81.4 °F
June 76.1 °F
Warmest sea temperature:
August 72.9 °F
July 71.2 °F
September 70.9 °F
The most cold months:
January 34.6 °F
February 36.0 °F
December 39.9 °F
The most rainy months:
November 3 days
July 3 days
December 3 days
The most windy months:
January 10 mph
December 10 mph
March 10 mph
more details