Measurements:
°C
°F
CURRENT WEATHER
14:16
New Castle
114°F
E 13 mph
Feels like: 128°F
Precip: 1%
World Resorts USA New Castle Weather

7 Day Weather Forecast

07.15
wed
DAY
104°F
E 11 mph
precip
1%
NIGHT
84°F
S 6 mph
precip
4%
07.16
thu
DAY
98°F
SE 7 mph
precip
1%
NIGHT
80°F
SE 4 mph
precip
29%
07.17
fri
DAY
92°F
S 6 mph
precip
1%
NIGHT
78°F
N 5 mph
precip
4%
07.18
sat
DAY
76°F
NW 4 mph
precip
42%
NIGHT
72°F
S 1 mph
precip
36%
07.19
sun
DAY
86°F
E 3 mph
precip
17%
NIGHT
78°F
SE 6 mph
precip
7%
07.20
mon
DAY
92°F
E 7 mph
precip
1%
NIGHT
74°F
SE 3 mph
precip
14%
07.21
tue
DAY
88°F
NE 2 mph
precip
3%
NIGHT
74°F
N 7 mph
precip
48%

New Castle Sea Water Temperature in July, °F

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for New Castle was 26.6°F. The maximum and minimum values were 24.5°F and 27.8°F respectively.

New Castle on the Weather Map

Best Time to Visit New Castle
The most sunny months:
November 17 days
October 16 days
June 15 days
The most warm months:
July 89.5 °F
August 86.0 °F
June 83.9 °F
Warmest sea temperature:
July 84.2 °F
August 83.3 °F
September 77.2 °F
The most cold months:
January 37.3 °F
February 40.7 °F
December 42.3 °F
The most rainy months:
July 3 days
August 3 days
June 2 days
The most windy months:
March 9 mph
April 9 mph
January 8 mph
more details