Measurements:
°C
°F
CURRENT WEATHER
09:39
Groton
60°F
SW 12 mph
Feels like: 60°F
Precip: 5%
World Resorts USA Groton Weather

14 Day Weather Forecast

09.15
tue
DAY
66°F
W 8 mph
precip
3%
NIGHT
66°F
NW 8 mph
precip
16%
09.16
wed
DAY
68°F
NE 8 mph
precip
11%
NIGHT
70°F
NE 10 mph
precip
9%
09.17
thu
DAY
74°F
N 11 mph
precip
9%
NIGHT
72°F
NE 12 mph
precip
29%
09.18
fri
DAY
74°F
W 8 mph
precip
5%
NIGHT
66°F
SW 11 mph
precip
21%
09.19
sat
DAY
66°F
W 12 mph
precip
4%
NIGHT
72°F
N 21 mph
precip
24%
09.20
sun
DAY
76°F
E 14 mph
precip
44%
NIGHT
68°F
SW 9 mph
precip
17%
09.21
mon
DAY
68°F
W 7 mph
precip
22%
NIGHT
62°F
W 15 mph
precip
46%
09.22
tue
DAY
64°F
W 20 mph
precip
29%
NIGHT
66°F
W 21 mph
precip
49%
09.23
wed
DAY
72°F
SE 6 mph
precip
32%
NIGHT
66°F
SW 7 mph
precip
31%
09.24
thu
DAY
64°F
SW 8 mph
precip
52%
NIGHT
66°F
NW 5 mph
precip
30%
09.25
fri
DAY
70°F
NE 11 mph
precip
24%
NIGHT
60°F
S 12 mph
precip
16%
09.26
sat
DAY
66°F
E 7 mph
precip
14%
NIGHT
60°F
NE 8 mph
precip
19%
09.27
sun
DAY
66°F
SW 16 mph
precip
12%
NIGHT
56°F
SW 14 mph
precip
20%
09.28
mon
DAY
58°F
SW 15 mph
precip
15%
NIGHT
56°F
SW 15 mph
precip
18%

Groton Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Groton was 72.2°F. The maximum and minimum values were 70.6°F and 73.6°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 83.8 °F
August 81.6 °F
June 77.2 °F
Warmest sea temperature:
August 73.0 °F
July 71.1 °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
USA Resorts:
NAME
F°
Boston +62
Chicago +66
Hawaii +80
Las Vegas +80
Los Angeles +72
Maui +66
Miami +88
Myrtle Beach +78
New York +66
Panama City Beach +90
San Diego +70
San Francisco +60
Santa Monica +72
Sarasota +86
Washington +66
all resorts
24 Hours Weather Forecast
Groton
Local time: 09:39
15 sep, tuesday
1200 66°F
W
8 mph
1500 66°F
NW
8 mph
1800 66°F
NW
7 mph
2100 66°F
NW
9 mph
16 sep, wednesday
0000 66°F
NW
8 mph
0300 64°F
NE
3 mph
0600 64°F
NE
4 mph
0900 66°F
NE
6 mph