New Castle, DE Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Wed
Jun 10 		Partly Cloudy -º / 71º 16% WSW 5 mph 94%
Thu
Jun 11 		Cloudy
View Hourly 		96º / 73º 19% W 11 mph 61%
12am Mostly Clear 72º 16% SW 5 mph 98%
1am Clear 73º 4% SW 5 mph 95%
2am Partly Cloudy 72º 15% WSW 5 mph 97%
3am Mostly Cloudy 73º 15% WSW 5 mph 92%
4am Mostly Cloudy 73º 4% WSW 5 mph 93%
5am Cloudy 72º 14% WSW 5 mph 94%
6am Cloudy 73º 10% WSW 5 mph 93%
7am Cloudy 74º 16% WSW 6 mph 92%
8am Mostly Cloudy 77º 7% W 6 mph 87%
9am Mostly Cloudy 81º 5% W 8 mph 76%
10am Cloudy 85º 3% W 9 mph 66%
11am Mostly Cloudy 88º 2% W 9 mph 59%
12pm Partly Cloudy 91º 1% W 9 mph 55%
1pm Cloudy 93º 1% W 9 mph 51%
2pm Cloudy 94º 15% W 10 mph 49%
3pm Mostly Cloudy 94º 15% W 11 mph 50%
4pm Cloudy 94º 15% W 11 mph 49%
5pm Mostly Cloudy 93º 15% WSW 11 mph 50%
6pm Mostly Cloudy 91º 19% W 11 mph 53%
7pm Mostly Cloudy 87º 20% W 11 mph 58%
8pm Mostly Cloudy 83º 11% W 9 mph 66%
9pm Mostly Cloudy 81º 7% WSW 8 mph 70%
10pm Partly Cloudy 80º 11% WSW 7 mph 74%
11pm Mostly Cloudy 78º 14% WSW 5 mph 79%
Fri
Jun 12 		Partly Cloudy
View Hourly 		96º / 68º 24% W 13 mph 58%
12am Mostly Cloudy 77º 21% WSW 5 mph 79%
1am Partly Cloudy 77º 16% W 4 mph 79%
2am Partly Cloudy 75º 11% W 4 mph 83%
3am Partly Cloudy 75º 9% W 5 mph 84%
4am Partly Cloudy 74º 13% W 4 mph 85%
5am Partly Cloudy 74º 15% W 4 mph 87%
6am Partly Cloudy 75º 14% W 4 mph 85%
7am Partly Cloudy 76º 12% WSW 5 mph 82%
8am Partly Cloudy 79º 4% W 5 mph 78%
9am Partly Cloudy 83º 2% W 6 mph 70%
10am Partly Cloudy 87º 2% W 8 mph 62%
11am Partly Cloudy 90º 1% W 9 mph 55%
12pm Mostly Sunny 92º 0% W 10 mph 52%
1pm Partly Cloudy 93º 0% W 11 mph 49%
2pm Partly Cloudy 94º 2% WSW 11 mph 47%
3pm Partly Cloudy 94º 11% W 12 mph 47%
4pm Mostly Cloudy 93º 24% W 13 mph 48%
5pm Partly Cloudy 91º 4% WSW 12 mph 51%
6pm Partly Cloudy 88º 24% W 12 mph 57%
7pm Thunderstorms 82º 66% WNW 12 mph 71%
8pm Isolated Thunderstorms 79º 32% WNW 10 mph 74%
9pm Mostly Cloudy 78º 14% WNW 8 mph 76%
10pm Cloudy 77º 13% WNW 9 mph 74%
11pm Mostly Cloudy 76º 7% WNW 8 mph 74%
Sat
Jun 13 		Sunny 89º / 67º 3% NW 10 mph 44%
Sun
Jun 14 		PM Thunderstorms 88º / 65º 79% SSW 13 mph 55%
Mon
Jun 15 		Partly Cloudy 82º / 62º 21% NW 9 mph 49%
Tue
Jun 16 		Showers 74º / 62º 40% SE 9 mph 64%
Wed
Jun 17 		Partly Cloudy 80º / 64º 24% SW 11 mph 60%

Weather Radar for New Castle, DE See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for New Castle, DE

Tonight
Low : 70ºF
Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 10pm. Waves 1 ft or less.
Thursday
High : 91ºF
W wind 5 to 10 kt. A slight chance of showers and thunderstorms after 3pm. Waves 1 ft or less.
Thursday Night
Low : 72ºF
W wind 5 to 10 kt. A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Waves 1 ft or less.
Friday
High : 92ºF
W wind 5 to 10 kt. A chance of showers and thunderstorms after 2pm. Waves 1 ft or less.
Friday Night
Low : 70ºF
NW wind 5 to 10 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Waves 1 ft or less.
Saturday
High : 86ºF
Variable winds 5 kt or less. Sunny. Waves 1 ft or less.
Saturday Night
Low : 69ºF
Variable winds 5 kt or less. Clear. Waves 1 ft or less.
Sunday
High : 90ºF
Variable winds less than 5 kt becoming SW 5 to 10 kt in the afternoon. Sunny. Waves 1 ft or less.
Sunday Night
Low : 69ºF
Variable winds 5 kt or less. A chance of showers. Waves 1 ft or less.

NOAA Buoy Data Near New Castle, DE See Map

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    Wind Speed Forecast for New Castle, DE

    ThursdayFridaySaturday
    Wind Speed (MPH) 5569119545101310
    4am8am12pm4pm8pm12am4am8am12pm4pm8pm12am
    MPH 5569119545101310
    DIR SWWSWWWWWWSWWWWWWNW

    Current Weather Conditions In New Castle, DE

    As Of: 49 minutes ago

    • 72ºF
    • 72ºF
    • 5mph
    • 0º (SW)
    • 5mph
    • Mostly Clear
    • 7mi
    • 29.81"
    • 98%
    • 0ºF

    The weather right now in New Castle, DE is Mostly Clear. The current temperature is 72°F, and the expected high and low for today, Thursday, June 11, 2026, are -° high temperature and 71°F low temperature. The wind is currently blowing at 5 miles per hour, and coming from the Southwest. The wind is gusting to 5 mph. With the wind and the atmosphere the temperature feels like 72° Fahrenheit. Expected precipitation is 16 percent, with current humidity at 98 percent, and air pressure at 29.81 in. Visibility is 7 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Heat Advisory - 2:36pm Wed Jun 10 2026

    ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THURSDAY TO 8 PM EDT FRIDAY...

    WHAT: Heat index values up to 104 degrees expected.

    WHERE: In Delaware, New Castle County. In New Jersey, Mercer,
    Camden, Gloucester, and Northwestern Burlington Counties. In
    Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower
    Bucks, and Philadelphia Counties.

    WHEN: From 11 AM Thursday to 8 PM EDT Friday.

    IMPACTS: Hot temperatures and high humidity may cause heat
    illnesses.

    ADDITIONAL DETAILS: Some showers and thunderstorms later Thursday
    afternoon and again later Friday afternoon will provide some local
    relief from the heat, however it will still remain very humid. It
    will then turn much less humid this weekend in the wake of a cold
    front.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    Take extra precautions when outside. Wear lightweight and loose
    fitting clothing. Try to limit strenuous activities to early morning
    or evening. Take action when you see symptoms of heat exhaustion and
    heat stroke.

    If you do not have air conditioning in your home or lack shelter,
    you can call 211, or visit your county or state health department
    website for assistance locating appropriate shelter from the heat.

    &&