19.09
sat
sat
Day
64°F
SW 7 mph
Precip.
7%
7%
Night
55°F
NW 7 mph
Precip.
11%
11%
20.09
sun
sun
Day
59°F
NW 9 mph
Precip.
17%
17%
Night
63°F
NW 14 mph
Precip.
80%
80%
21.09
mon
mon
Day
59°F
SW 17 mph
Precip.
36%
36%
Night
57°F
SW 13 mph
Precip.
21%
21%
22.09
tue
tue
Day
55°F
SW 17 mph
Precip.
24%
24%
Night
55°F
SW 14 mph
Precip.
44%
44%
23.09
wed
wed
Day
63°F
SW 21 mph
Precip.
18%
18%
Night
59°F
SW 19 mph
Precip.
22%
22%
24.09
thu
thu
Day
57°F
SW 20 mph
Precip.
74%
74%
Night
55°F
S 19 mph
Precip.
53%
53%
25.09
fri
fri
Day
55°F
S 15 mph
Precip.
21%
21%
Night
55°F
S 8 mph
Precip.
14%
14%
sea water
temperature
temperature
| Jamestown |
monthly
weather
weather
| Jamestown |
current
weather
weather
| Jamestown |
14 days
forecast
forecast
| Jamestown |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 69.8°F. The highest and lowest sea temperatures during the month were 70.9°F and 68.2°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 63.9°F. The highest and lowest sea temperatures during the month were 69.1°F and 59.2°F.
Air temperature in Jamestown, °F
Precipitation total in Jamestown, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Jamestown
Jamestown on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Jamestown
Local time: 05:18
September 19, saturday
0600
54°F
SW
9 mph
9 mph
0900
59°F
SW
12 mph
12 mph
1200
64°F
SW
7 mph
7 mph
1500
64°F
W
7 mph
7 mph
1800
59°F
W
11 mph
11 mph
2100
55°F
W
8 mph
8 mph
September 20, sunday
0000
55°F
NW
7 mph
7 mph
0300
55°F
NW
6 mph
6 mph
