Current Sea Water Temperature:
+83.4°F
| Maximum Sea Water Temperature in July: | 89.4°F |
| Minimum Sea Water Temperature in July: | 75.6°F |
| Average water temperature in July: | 84.1°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| July 15 | 83.4°F | July 10 | 84.6°F |
| July 14 | 82.2°F | July 09 | 84.0°F |
| July 13 | 83.2°F | July 08 | 82.8°F |
| July 12 | 82.8°F | July 07 | 84.6°F |
| July 11 | 82.0°F | July 06 | 84.4°F |
When is the Warmest Sea for New Castle?
According to our data for the last three years for New Castle the highest average sea water temperature was in July, August and September.
Average Water Temperature by Month, °F
Sea Water Temperature in July
The average sea surface temperature in July 2026 for New Castle was 83.1°F. The maximum and minimum values were 79.0°F and 85.6°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for New Castle was 82.9°F. The maximum and minimum values were 78.8°F and 87.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for New Castle was 76.2°F. The maximum and minimum values were 74.0°F and 78.6°F respectively.
USA Resorts:
NAME
F°
| Boston |  |
+96 |
| Chicago | |
+84 |
| Hawaii |  |
+82 |
| Houston |  |
+82 |
| Las Vegas | |
+118 |
| Los Angeles | |
+100 |
| Maui | |
+78 |
| Miami | |
+96 |
| Myrtle Beach | |
+90 |
| New York | |
+104 |
| San Diego | |
+94 |
| San Francisco | |
+82 |
| Santa Monica | |
+82 |
| Sarasota | |
+96 |
| Tampa | |
+98 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
New Castle
Local time: 17:34
15 jul, wednesday
| 1800 |  |
110°F | E 6 mph |
| 2100 |  |
96°F | E 7 mph |
16 jul, thursday
| 0000 | |
88°F | S 6 mph |
| 0300 | |
80°F | S 4 mph |
| 0600 |  |
76°F | SE 2 mph |
| 0900 | |
86°F | E 3 mph |
| 1200 | |
96°F | E 8 mph |
| 1500 | |
100°F | E 11 mph |