Current sea water temperature:
+81.0°F
| Minimum sea water temperature in July: | 85.5°F |
| Maximum sea water temperature in July: | 73.0°F |
| Average sea water temperature in July: | 80.7°F |
| more information | |
14 days
forecast
forecast
| New Castle |
monthly
weather
weather
| New Castle |
Sea water temperature for the last 10 days:
| July 21 | 81.0°F | July 16 | 81.5°F |
| July 20 | 81.7°F | July 15 | 80.1°F |
| July 19 | 81.5°F | July 14 | 79.0°F |
| July 18 | 80.4°F | July 13 | 79.9°F |
| July 17 | 81.7°F | July 12 | 79.5°F |
Monthly sea water temperature, °F
When is the warmest sea in New Castle?
Based on the data about daily sea water temperature for the last three years the warmest sea in New Castle was noticed in July, August and September.
Monthly Sea Temperatures in New Castle, °F
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 80.2°F. The highest and lowest sea temperatures during the month were 82.0°F and 76.1°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 79.6°F. The highest and lowest sea temperatures during the month were 84.0°F and 75.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 73.5°F. The highest and lowest sea temperatures during the month were 75.7°F and 71.6°F.
current
weather
weather
| New Castle |
weather in
July
July
| New Castle |
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: 09:32
July 21, tuesday
1200
84°F
N
11 mph
11 mph
1500
91°F
NE
13 mph
13 mph
1800
91°F
SE
11 mph
11 mph
2100
70°F
NE
6 mph
6 mph
July 22, wednesday
0000
70°F
N
7 mph
7 mph
0300
70°F
NE
6 mph
6 mph
0600
72°F
NE
8 mph
8 mph
0900
77°F
NE
10 mph
10 mph
