Measurements:
°C
°F
CURRENT WEATHER
13:58
New Castle
62°F
SE 13 mph
Feels like: 62°F
Precip: 0%
World Resorts USA New Castle Weather

7 Day Weather Forecast

05.14
thu
DAY
60°F
SE 13 mph
precip
100%
NIGHT
50°F
SE 12 mph
precip
0%
05.15
fri
DAY
60°F
SE 13 mph
precip
0%
NIGHT
52°F
SW 2 mph
precip
0%
05.16
sat
DAY
74°F
NE 8 mph
precip
0%
NIGHT
64°F
NE 4 mph
precip
0%
05.17
sun
DAY
80°F
E 10 mph
precip
0%
NIGHT
72°F
NW 2 mph
precip
0%
05.18
mon
DAY
86°F
NW 6 mph
precip
0%
NIGHT
66°F
NW 7 mph
precip
0%
05.19
tue
DAY
88°F
N 8 mph
precip
0%
NIGHT
76°F
N 9 mph
precip
0%
05.20
wed
DAY
84°F
E 11 mph
precip
100%
NIGHT
60°F
SE 5 mph
precip
0%

New Castle Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for New Castle was 17.2°F. The maximum and minimum values were 16.1°F and 18.4°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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