Marine Weather Net

New Castle, DE Weather Forecast




New Castle, Delaware

 Lat: 39.66N, Lon: 75.57W

Current Conditions Updated: 351 PM EDT TUE AUG 11 2026

Clear


Temp: 87°F
  • Humidity:
  • 55%
  • Winds:
  • 5 MPH W
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.88 in.
  • Dewpoint:
  • 69°F
  • Heat index:
  • 91°F

  • Sunrise:
  • 6:09 AM EDT
  • Sunset:
  • 8:02 PM EDT
  • Moonrise:
  • 4:33 AM EDT
  • Moonset:
  • 7:38 PM EDT

THIS AFTERNOON

MOSTLY SUNNY
Lo: 67°F
Precip: 20%

WEDNESDAY

MOSTLY SUNNY
Hi: 85°F
Lo: 75°F

THURSDAY

SUNNY

Hi: 89°F
Lo: 71°F

FRIDAY

MOSTLY SUNNY
Hi: 85°F
Lo: 61°F
Weather Forecast In Detail:
Forecast Issued: 210 PM EDT Tue Aug 11 2026

COASTAL FLOOD ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 2 AM EDT WEDNESDAY
This Afternoon...Mostly sunny with a slight chance of showers and thunderstorms. Hot. Near steady temperature in the mid 80s. West winds 5 to 10 mph. Chance of rain 20 percent.
Tonight...Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. West winds around 5 mph. Chance of rain 60 percent.
Wednesday...Mostly sunny. Hot with highs in the mid 80s. Northwest winds around 5 mph.
Wednesday Night...Partly cloudy. A chance of showers after midnight. Humid with lows around 70. West winds around 5 mph. Chance of rain 30 percent.
Thursday...Sunny, hot with highs in the upper 80s. West winds 5 to 10 mph.
Thursday Night...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. Lows in the lower 70s. Chance of rain 40 percent.
Friday...Mostly sunny. Highs in the mid 80s.
Friday Night...Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 60s.
Saturday...Sunny. Highs in the lower 80s.
Saturday Night...Partly cloudy. Lows in the lower 60s.
Sunday...Mostly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.
Sunday Night...Mostly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 50 percent.
Monday...Partly sunny with a 40 percent chance of showers. Hot with highs in the mid 80s.
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