New Castle, DE Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Tue
Jul 21 		Scattered Thunderstorms
Close Hourly 		84º / 72º 76% S 13 mph 83%
4am Cloudy 73º 10% SSE 7 mph 88%
5am Cloudy 74º 11% SSE 7 mph 88%
6am Cloudy 74º 11% SSE 8 mph 90%
7am Cloudy 74º 21% SSE 9 mph 92%
8am Cloudy 76º 15% S 9 mph 92%
9am Cloudy 78º 14% S 10 mph 86%
10am Cloudy 80º 22% S 10 mph 83%
11am Scattered Thunderstorms 82º 52% SSW 10 mph 79%
12pm Isolated Thunderstorms 83º 33% SSW 11 mph 77%
1pm Cloudy 83º 20% SSW 11 mph 79%
2pm Cloudy 84º 21% SSW 12 mph 77%
3pm Cloudy 84º 23% SSW 12 mph 77%
4pm Scattered Thunderstorms 84º 46% SSW 12 mph 76%
5pm Scattered Thunderstorms 82º 50% SSW 13 mph 78%
6pm Thunderstorms 80º 77% SSW 12 mph 80%
7pm Thunderstorms 78º 77% SSW 11 mph 86%
8pm Thunderstorms 77º 67% SSW 12 mph 88%
9pm Scattered Thunderstorms 75º 40% SSW 10 mph 91%
10pm Scattered Thunderstorms 74º 36% SSW 10 mph 92%
11pm Scattered Thunderstorms 74º 41% SW 11 mph 95%
Wed
Jul 22 		Partly Cloudy
View Hourly 		87º / 64º 24% W 12 mph 68%
12am Scattered Thunderstorms 73º 43% SW 11 mph 96%
1am Scattered Thunderstorms 73º 43% SW 10 mph 95%
2am Cloudy 74º 24% SW 10 mph 95%
3am Isolated Thunderstorms 73º 34% SW 10 mph 95%
4am Mostly Cloudy 73º 24% WSW 10 mph 94%
5am Mostly Cloudy 73º 14% SW 9 mph 90%
6am Mostly Cloudy 73º 23% SW 9 mph 91%
7am Mostly Cloudy 73º 20% SW 8 mph 92%
8am Mostly Cloudy 75º 21% WSW 8 mph 89%
9am Mostly Cloudy 77º 8% WSW 10 mph 84%
10am Partly Cloudy 80º 8% W 10 mph 76%
11am Mostly Cloudy 82º 7% W 10 mph 70%
12pm Mostly Cloudy 83º 9% W 10 mph 65%
1pm Partly Cloudy 84º 24% W 11 mph 60%
2pm Partly Cloudy 85º 22% W 12 mph 58%
3pm Partly Cloudy 85º 16% W 12 mph 57%
4pm Partly Cloudy 86º 22% W 12 mph 55%
5pm Partly Cloudy 85º 4% W 12 mph 55%
6pm Partly Cloudy 83º 8% W 11 mph 54%
7pm Mostly Sunny 82º 3% WNW 10 mph 54%
8pm Partly Cloudy 80º 1% NW 9 mph 55%
9pm Partly Cloudy 77º 1% NW 8 mph 59%
10pm Mostly Clear 75º 1% NW 7 mph 62%
11pm Mostly Clear 74º 1% NNW 7 mph 64%
Thu
Jul 23 		Sunny
View Hourly 		82º / 62º 3% N 9 mph 50%
12am Partly Cloudy 72º 2% NNW 8 mph 65%
1am Mostly Cloudy 71º 2% NNW 8 mph 63%
2am Partly Cloudy 70º 3% NNW 7 mph 66%
3am Partly Cloudy 69º 3% N 8 mph 67%
Fri
Jul 24 		Mostly Sunny 84º / 64º 6% E 10 mph 56%
Sat
Jul 25 		Partly Cloudy 81º / 63º 24% E 8 mph 62%
Sun
Jul 26 		Mostly Sunny 84º / 67º 14% W 8 mph 66%
Mon
Jul 27 		Partly Cloudy 84º / 67º 24% WSW 10 mph 70%
Tue
Jul 28 		Partly Cloudy 84º / 67º 24% WNW 10 mph 70%

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

Tuesday
High : 85ºF
SSE wind 5 to 10 kt becoming SSW in the afternoon. Showers and thunderstorms likely, mainly after 5pm. Waves 1 ft or less.
Tuesday Night
Low : 73ºF
SSW wind around 10 kt. Showers and possibly a thunderstorm before 11pm, then a chance of showers and thunderstorms after 11pm. Some of the storms could produce heavy rainfall. Waves 1 ft or less.
Wednesday
High : 85ºF
SW wind around 10 kt becoming W in the afternoon. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.
Wednesday Night
Low : 66ºF
W wind 5 to 10 kt becoming NNW after midnight. Showers likely and possibly a thunderstorm before 8pm. Waves 1 ft or less.
Thursday
High : 79ºF
Variable winds 5 kt or less. Sunny. Waves 1 ft or less.
Thursday Night
Low : 63ºF
Variable winds 5 kt or less. Clear. Waves 1 ft or less.
Friday
High : 81ºF
Variable winds 5 kt or less. Sunny. Waves 1 ft or less.
Friday Night
Low : 65ºF
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Saturday
High : 81ºF
Variable winds 5 kt or less. Mostly sunny. 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

    TuesdayWednesdayThursday
    Wind Speed (MPH) 7911121211108101298
    8am12pm4pm8pm12am4am8am12pm4pm8pm12am4am
    MPH 7911121211108101298
    DIR SSESSSWSSWSSWSWWSWWSWWWNWNNW

    Current Weather Conditions In New Castle, DE

    As Of: 27 seconds ago

    • 73ºF
    • 73ºF
    • 7mph
    • 0º (SSE)
    • 7mph
    • Cloudy
    • 10mi
    • 29.89"
    • 88%
    • 0ºF

    The weather right now in New Castle, DE is Cloudy. The current temperature is 73°F, and the expected high and low for today, Tuesday, July 21, 2026, are 84° high temperature and 72°F low temperature. The wind is currently blowing at 7 miles per hour, and coming from the South Southeast. The wind is gusting to 7 mph. With the wind and the atmosphere the temperature feels like 73° Fahrenheit. Expected precipitation is 10 percent, with current humidity at 88 percent, and air pressure at 29.89 in. Visibility is 10 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Flood Watch - 3:07am Tue Jul 21 2026

    ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

    WHAT: Flash flooding caused by excessive rainfall continues to be
    possible.

    WHERE: Portions of northern Delaware, including the following
    area, New Castle, New Jersey, including the following areas,
    Camden, Eastern Monmouth, Gloucester, Hunterdon, Mercer,
    Middlesex, Morris, Northwestern Burlington, Somerset and Western
    Monmouth, and southeast Pennsylvania, including the following
    areas, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks,
    Philadelphia, Upper Bucks, Western Chester and Western Montgomery.

    WHEN: Through late tonight.

    IMPACTS: Excessive runoff may result in flooding of rivers,
    creeks, streams, and other low-lying and flood-prone locations.
    Flooding may occur in poor drainage and urban areas.

    ADDITIONAL DETAILS: - Showers and thunderstorms will increase today into tonight,
    with the most widespread activity occurring this afternoon
    and this evening. Some heavy showers and thunderstorms will
    produce torrential rainfall, with 2 to 3 inches of rain per
    hour possible. The excessive rainfall within a short period
    of time, especially in urban areas, could lead to flash
    flooding.
    - http://www.weather.gov/safety/flood

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    You should monitor later forecasts and be prepared to take action
    should Flash Flood Warnings be issued.

    &&

    Small Craft Advisory - 3:09am Tue Jul 21 2026

    ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO MIDNIGHT EDT TONIGHT...

    WHAT: South winds 15 to 20 kt with gusts up to 30 kt and
    choppy waters expected.

    WHERE: Delaware Bay.

    WHEN: From noon today to midnight EDT tonight.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced mariners, especially those operating smaller
    vessels, should avoid navigating in hazardous conditions.

    &&