19.09
sat
sat
Day
64°F
W 8 mph
Precip.
12%
12%
Night
61°F
NW 13 mph
Precip.
7%
7%
20.09
sun
sun
Day
64°F
NW 15 mph
Precip.
19%
19%
Night
68°F
NE 10 mph
Precip.
50%
50%
21.09
mon
mon
Day
63°F
SW 16 mph
Precip.
19%
19%
Night
59°F
SW 15 mph
Precip.
20%
20%
22.09
tue
tue
Day
63°F
W 23 mph
Precip.
18%
18%
Night
55°F
SW 22 mph
Precip.
72%
72%
23.09
wed
wed
Day
63°F
W 28 mph
Precip.
20%
20%
Night
61°F
SW 28 mph
Precip.
38%
38%
24.09
thu
thu
Day
59°F
SW 34 mph
Precip.
55%
55%
Night
54°F
S 25 mph
Precip.
73%
73%
25.09
fri
fri
Day
54°F
SE 22 mph
Precip.
68%
68%
Night
61°F
S 24 mph
Precip.
22%
22%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 69.1°F. The highest and lowest sea temperatures during the month were 70.3°F and 67.8°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 64.5°F. The highest and lowest sea temperatures during the month were 68.7°F and 60.3°F.
Air temperature in Mystic, °F
Precipitation total in Mystic, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Mystic
Mystic on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Mystic
Local time: 05:21
September 19, saturday
0600
59°F
SW
12 mph
12 mph
0900
61°F
SW
12 mph
12 mph
1200
64°F
W
8 mph
8 mph
1500
63°F
NW
12 mph
12 mph
1800
63°F
NW
11 mph
11 mph
2100
63°F
NW
12 mph
12 mph
September 20, sunday
0000
61°F
NW
13 mph
13 mph
0300
61°F
NW
11 mph
11 mph
