19.09
sat
sat
Day
72°F
W 6 mph
Precip.
1%
1%
Night
64°F
W 7 mph
Precip.
18%
18%
20.09
sun
sun
Day
73°F
N 11 mph
Precip.
23%
23%
Night
70°F
NE 4 mph
Precip.
39%
39%
21.09
mon
mon
Day
72°F
SW 11 mph
Precip.
7%
7%
Night
63°F
W 9 mph
Precip.
25%
25%
22.09
tue
tue
Day
61°F
W 12 mph
Precip.
33%
33%
Night
55°F
SW 15 mph
Precip.
80%
80%
23.09
wed
wed
Day
55°F
SW 14 mph
Precip.
86%
86%
Night
61°F
SW 12 mph
Precip.
25%
25%
24.09
thu
thu
Day
57°F
SW 12 mph
Precip.
22%
22%
Night
55°F
S 7 mph
Precip.
27%
27%
25.09
fri
fri
Day
59°F
SW 9 mph
Precip.
20%
20%
Night
57°F
S 4 mph
Precip.
20%
20%
sea water
temperature
temperature
| New Castle |
monthly
weather
weather
| New Castle |
current
weather
weather
| New Castle |
14 days
forecast
forecast
| New Castle |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 78.0°F. The highest and lowest sea temperatures during the month were 79.9°F and 75.7°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 66.2°F. The highest and lowest sea temperatures during the month were 72.9°F and 58.3°F.
Air temperature in New Castle, °F
Precipitation total in New Castle, in.
* Charts above show average data for the last 3 years.
Best time for vacation in New Castle
New Castle on a weather map
Places in USA:
Name
°F
24 Hours Forecast
New Castle
Local time: 06:58
September 19, saturday
0900
64°F
SW
10 mph
10 mph
1200
72°F
W
6 mph
6 mph
1500
75°F
SW
5 mph
5 mph
1800
70°F
NW
11 mph
11 mph
2100
63°F
NW
7 mph
7 mph
September 20, sunday
0000
64°F
W
7 mph
7 mph
0300
64°F
W
7 mph
7 mph
0600
63°F
W
6 mph
6 mph
