Measurements:
°C
°F
CURRENT WEATHER
01:09
New Castle
70°F
E 4 mph
Feels like: 70°F
Precip: 4%
World Resorts USA New Castle Weather

7 Day Weather Forecast

06.25
thu
DAY
88°F
N 8 mph
precip
1%
NIGHT
72°F
N 9 mph
precip
8%
06.26
fri
DAY
84°F
E 4 mph
precip
7%
NIGHT
70°F
W 4 mph
precip
38%
06.27
sat
DAY
76°F
S 1 mph
precip
33%
NIGHT
70°F
S 3 mph
precip
38%
06.28
sun
DAY
84°F
S 4 mph
precip
17%
NIGHT
70°F
N 4 mph
precip
15%
06.29
mon
DAY
88°F
SE 3 mph
precip
2%
NIGHT
72°F
N 5 mph
precip
9%
06.30
tue
DAY
90°F
E 5 mph
precip
3%
NIGHT
74°F
NW 4 mph
precip
26%
07.01
wed
DAY
82°F
NW 8 mph
precip
17%
NIGHT
70°F
NW 6 mph
precip
25%

New Castle Sea Water Temperature in June, °F

Select Year: 2026 2025 2024

The average sea surface temperature in June 2026 for New Castle was 22.6°F. The maximum and minimum values were 19.2°F and 24.7°F respectively.

New Castle on the Weather Map

Best Time to Visit New Castle
The most sunny months:
November 17 days
October 16 days
September 15 days
The most warm months:
July 89.5 °F
August 86.0 °F
June 83.1 °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
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