Marine Weather Net

New Castle, DE Weather Forecast




New Castle, Delaware

 Lat: 39.66N, Lon: 75.57W

Current Conditions Updated: 751 AM EST THU DEC 18 2025

Clear


Temp: 29°F
  • Humidity:
  • 88%
  • Winds:
  • 6 MPH E
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.27 in.
  • Dewpoint:
  • 26°F
  • Heat index:
  • 29°F

  • Sunrise:
  • 7:16 AM EST
  • Sunset:
  • 4:38 PM EST
  • Moonrise:
  • 6:19 AM EST
  • Moonset:
  • 3:15 PM EST

TODAY

MOSTLY SUNNY
Hi: 51°F
Lo: 41°F

FRIDAY

RAIN
Hi: 55°F
Lo: 25°F
Precip: 90%

SATURDAY

MOSTLY SUNNY
Hi: 41°F
Lo: 39°F

SUNDAY

MOSTLY SUNNY
Hi: 49°F
Lo: 25°F
Weather Forecast In Detail:
Forecast Issued: 400 AM EST Thu Dec 18 2025

WIND ADVISORY REMAINS IN EFFECT FROM 1 AM FRIDAY TO 1 AM EST SATURDAY
Today...Mostly sunny. Highs in the lower 50s. Southeast winds around 5 mph.
Tonight...A chance of rain in the evening, then rain with a slight chance of thunderstorms after midnight. Not as cool with lows in the lower 40s. Temperature rising into the mid 50s after midnight. Southeast winds 5 to 10 mph with gusts up to 20 mph, increasing to south 15 to 20 mph with gusts up to 35 mph after midnight. Chance of rain near 100 percent.
Friday...Rain. Highs in the mid 50s. Temperature falling to around 40 in the afternoon. West winds 15 to 20 mph with gusts up to 40 mph. Chance of rain 90 percent.
Friday Night...Mostly clear. Much colder with lows in the mid 20s. West winds 15 to 20 mph with gusts up to 35 mph, diminishing to 5 to 10 mph with gusts up to 20 mph after midnight.
Saturday...Mostly sunny. Cooler with highs in the lower 40s. West winds around 5 mph, becoming southwest in the afternoon.
Saturday Night...Partly cloudy in the evening, then becoming mostly cloudy. Near steady temperature in the upper 30s.
Sunday...Mostly sunny. Highs in the upper 40s. Temperature falling into the lower 40s in the afternoon.
Sunday Night...Mostly clear. Colder with lows in the mid 20s.
Monday...Sunny, cooler with highs in the upper 30s.
Monday Night...Mostly cloudy. Cold with lows in the mid 20s.
Tuesday...Mostly cloudy. A chance of rain and snow in the morning. Highs in the lower 40s. Chance of precipitation 30 percent.
Tuesday Night...Mostly cloudy. Lows in the mid 30s.
Wednesday...Partly sunny. Highs in the upper 40s.
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