Marine Weather Net

New Castle, DE Weather Forecast




New Castle, Delaware

 Lat: 39.66N, Lon: 75.57W

Current Conditions Updated: 951 PM EDT THU JUN 11 2026

Lightning Observed
Temp: 85°F
  • Humidity:
  • 69%
  • Winds:
  • 6 MPH SW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.78 in.
  • Dewpoint:
  • 74°F
  • Heat index:
  • 92°F

  • Sunrise:
  • 5:32 AM EDT
  • Sunset:
  • 8:28 PM EDT
  • Moonrise:
  • 2:29 AM EDT
  • Moonset:
  • 4:46 PM EDT

TONIGHT

CHANCE OF SHOWERS
Lo: 71°F
Precip: 50%

FRIDAY

MOSTLY SUNNY
Hi: 95°F
Lo: 67°F
Precip: 50%

SATURDAY

SUNNY

Hi: 89°F
Lo: 65°F

SUNDAY

MOSTLY SUNNY
Hi: 89°F
Lo: 61°F
Precip: 50%
Weather Forecast In Detail:
Forecast Issued: 725 PM EDT Thu Jun 11 2026

HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY ...SEVERE THUNDERSTORM WATCH 317 IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...
Tonight...Mostly cloudy. A chance of showers and thunderstorms this evening, then a slight chance of showers after midnight. Some thunderstorms May be severe with damaging winds. Lows in the lower 70s. West winds 5 to 10 mph. Chance of rain 50 percent.
Friday...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. West winds 5 to 10 mph. Chance of rain 50 percent.
Friday Night...Mostly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the upper 60s. Northwest winds 5 to 10 mph. Chance of rain 50 percent.
Saturday...Sunny, hot with highs in the upper 80s. Northwest winds around 5 mph.
Saturday Night...Mostly clear. Lows in the mid 60s. West winds around 5 mph.
Sunday...Mostly sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 80s. Chance of rain 50 percent.
Sunday Night...Showers likely with a chance of thunderstorms. Lows in the lower 60s. Chance of rain 70 percent.
Monday...Mostly sunny. Not as warm with highs in the upper 70s.
Monday Night...Partly cloudy. Lows in the lower 60s.
Tuesday...Partly sunny. Highs in the upper 70s.
Tuesday Night...Partly cloudy. Lows in the lower 60s.
Wednesday...Mostly sunny. Highs in the lower 80s.
Wednesday Night...Partly cloudy. Lows in the lower 60s.
Thursday...Mostly sunny. A chance of showers in the afternoon. Hot with highs in the mid 80s. Chance of rain 40 percent.
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