World Resorts USA New Castle Weather

New Castle sea water temperature

Current sea water temperature:
+32.5°F
Minimum sea water temperature in February: 45.3°F
Maximum sea water temperature in February: 31.6°F
Average sea water temperature in February: 37.9°F

Sea water temperature for the last 10 days:

February 5 32.5°F January 31 31.5°F
February 4 31.8°F January 30 31.8°F
February 3 31.6°F January 29 32.5°F
February 2 32.2°F January 28 32.7°F
February 1 31.8°F January 27 33.4°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:
2025
2024
2023

The average sea water temperature in July of 2025 was 81.2°F. The highest and lowest sea temperatures during the month were 83.7°F and 78.4°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.

Best time for vacation in New Castle

Sunniest months:
November 17 days
October 16 days
September 15 days
Warmest months:
July 85.5 °F
August 82.4 °F
June 79.8 °F
Warmest sea temp:
July 80.8 °F
August 80.0 °F
September 74.5 °F
Coldest months:
January 38.6 °F
February 42.3 °F
December 43.1 °F
Rainiest months:
July 3 days
August 3 days
April 3 days
Windiest months:
March 9.2 mph
April 8.8 mph
January 8.5 mph

New Castle on a weather map

New Castle
+18°F
SE 3 mph
Feels like: +12°F
Precip.: 0%
Places in USA:
Name
°F
+14°F
+75°F
+75°F
+59°F
+64°F
+48°F
+52°F
+68°F
+7°F
+57°F
+57°F
+46°F
+45°F
+54°F
+27°F
24 Hours Forecast
New Castle
Local time: 22:38
February 06, friday
0000
18°F
SE
3 mph
0300
18°F
S
4 mph
0600
16°F
S
4 mph
0900
18°F
S
1 mph
1200
27°F
NE
3 mph
1500
30°F
NE
3 mph
1800
28°F
NE
2 mph
2100
28°F
NW
2 mph
Units of measurement: °C / °F