New Castle, DE Weather Forecast and Current Conditions
| Day | Sky | High / Low | Precip | Wind | Humidity | |
|---|---|---|---|---|---|---|
|
Tue Jun 30 |
 |
Cloudy | -º / 74º | 5% | SSW 8 mph | 70% |
|
Wed Jul 1 |
 |
Partly Cloudy View Hourly |
97º / 77º | 15% | SW 11 mph | 58% |
| 2am | |
Cloudy | 76º | 1% | SSW 8 mph | 66% |
| 3am |  |
Mostly Cloudy | 76º | 2% | SSW 8 mph | 67% |
| 4am |  |
Partly Cloudy | 75º | 2% | SSW 7 mph | 71% |
| 5am | |
Partly Cloudy | 75º | 2% | SSW 7 mph | 76% |
| 6am | |
Partly Cloudy | 75º | 5% | SSW 8 mph | 77% |
| 7am | |
Partly Cloudy | 76º | 6% | SW 9 mph | 77% |
| 8am | |
Partly Cloudy | 78º | 4% | SW 9 mph | 73% |
| 9am |  |
Mostly Sunny | 81º | 2% | SW 9 mph | 67% |
| 10am | |
Mostly Sunny | 85º | 1% | SW 9 mph | 62% |
| 11am |  |
Sunny | 87º | 0% | SW 9 mph | 58% |
| 12pm | |
Sunny | 90º | 0% | SW 9 mph | 57% |
| 1pm | |
Mostly Sunny | 92º | 15% | SW 9 mph | 55% |
| 2pm | |
Mostly Sunny | 94º | 15% | SW 9 mph | 52% |
| 3pm | |
Partly Cloudy | 95º | 15% | SW 10 mph | 51% |
| 4pm | |
Partly Cloudy | 95º | 15% | SW 10 mph | 50% |
| 5pm | |
Partly Cloudy | 95º | 15% | SW 10 mph | 49% |
| 6pm | |
Partly Cloudy | 95º | 15% | SW 11 mph | 49% |
| 7pm | |
Partly Cloudy | 94º | 15% | SW 10 mph | 52% |
| 8pm | |
Partly Cloudy | 90º | 15% | SSW 10 mph | 58% |
| 9pm | |
Partly Cloudy | 87º | 15% | SSW 9 mph | 64% |
| 10pm |  |
Mostly Clear | 86º | 1% | SSW 9 mph | 66% |
| 11pm | |
Mostly Clear | 84º | 1% | SSW 8 mph | 70% |
|
Thu Jul 2 |
|
Sunny View Hourly |
103º / 80º | 2% | W 11 mph | 52% |
| 12am | |
Partly Cloudy | 83º | 2% | SW 8 mph | 72% |
| 1am | |
Partly Cloudy | 82º | 2% | SW 7 mph | 74% |
| 2am |  |
Clear | 81º | 2% | SW 6 mph | 76% |
| 3am | |
Clear | 80º | 3% | SW 6 mph | 78% |
| 4am | |
Clear | 79º | 4% | SW 5 mph | 80% |
| 5am | |
Clear | 79º | 4% | SW 4 mph | 82% |
| 6am | |
Sunny | 78º | 4% | WSW 4 mph | 83% |
| 7am | |
Sunny | 80º | 3% | WSW 5 mph | 80% |
| 8am | |
Sunny | 84º | 2% | W 6 mph | 73% |
| 9am | |
Sunny | 88º | 1% | W 6 mph | 66% |
| 10am | |
Sunny | 92º | 0% | W 6 mph | 58% |
| 11am | |
Sunny | 94º | 0% | WNW 6 mph | 52% |
| 12pm | |
Sunny | 97º | 0% | W 7 mph | 48% |
| 1pm | |
Sunny | 98º | 0% | W 7 mph | 44% |
| 2pm | |
Sunny | 100º | 0% | W 8 mph | 41% |
| 3pm | |
Sunny | 101º | 0% | WSW 9 mph | 40% |
| 4pm | |
Sunny | 101º | 0% | WSW 10 mph | 39% |
| 5pm | |
Sunny | 101º | 0% | WSW 9 mph | 39% |
| 6pm | |
Sunny | 100º | 0% | WSW 11 mph | 39% |
| 7pm | |
Sunny | 98º | 0% | SW 10 mph | 43% |
| 8pm | |
Sunny | 94º | 0% | SW 8 mph | 47% |
| 9pm | |
Clear | 91º | 0% | SW 8 mph | 52% |
| 10pm | |
Clear | 90º | 0% | SW 8 mph | 57% |
| 11pm | |
Clear | 87º | 1% | SW 8 mph | 62% |
|
Fri Jul 3 |
|
Mostly Sunny View Hourly |
103º / 80º | 15% | WNW 11 mph | 46% |
| 12am | |
Clear | 86º | 1% | WSW 7 mph | 66% |
| 1am | |
Clear | 85º | 2% | WSW 6 mph | 68% |
|
Sat Jul 4 |
 |
Isolated Thunderstorms | 101º / 76º | 34% | W 10 mph | 47% |
|
Sun Jul 5 |
 |
PM Thunderstorms | 94º / 72º | 57% | W 8 mph | 57% |
|
Mon Jul 6 |
 |
Thunderstorms | 86º / 72º | 65% | NW 8 mph | 73% |
|
Tue Jul 7 |
|
PM Thunderstorms | 86º / 68º | 35% | NNE 10 mph | 66% |
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Buoy Data
For New Castle, DE -
Wind Forecast
In New Castle, DE -
Radar
In New Castle, DE -
Marine Forecast
In New Castle, DE
Weather Radar for New Castle, DE See Radar
* Playback displays weather for the past 6 hours.
NOAA Weather Marine Forecast for New Castle, DE
SW wind 5 to 10 kt. Sunny. Waves 1 ft or less.
SSW wind 5 to 10 kt. A slight chance of showers and thunderstorms before midnight. Waves 1 ft or less.
Variable winds 5 kt or less. Sunny. Waves 1 ft or less.
Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.
W wind 5 to 10 kt. Sunny. Waves 1 ft or less.
Variable winds 5 kt or less. A slight chance of showers and thunderstorms before 2am. Waves 1 ft or less.
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Variable winds 5 kt or less. A chance of showers and thunderstorms between 8pm and 2am. Waves 1 ft or less.
Variable winds 5 kt or less. A chance of showers and thunderstorms after 2pm. Waves 1 ft or less.
NOAA Buoy Data Near New Castle, DE See Map
Wind Speed Forecast for New Castle, DE
| Wednesday | Thursday | Friday | ||||||||||
| Wind Speed (MPH) | 8 | 8 | 9 | 9 | 11 | 9 | 6 | 4 | 6 | 8 | 11 | 8 |
| 6am | 10am | 2pm | 6pm | 10pm | 2am | 6am | 10am | 2pm | 6pm | 10pm | 2am | |
| MPH | 8 | 8 | 9 | 9 | 11 | 9 | 6 | 4 | 6 | 8 | 11 | 8 |
| DIR | SSW | SSW | SW | SW | SW | SSW | SW | WSW | W | W | WSW | SW |
Current Weather Conditions In New Castle, DE
As Of: 10 minutes ago
- 76ºF
- 76ºF
- 8mph
- 0º (SSW)
- 8mph
- Cloudy
- 10mi
- 30.04"
- 66%
- 0ºF
The weather right now in New Castle, DE is Cloudy. The current temperature is 76°F, and the expected high and low for today, Wednesday, July 1, 2026, are -° high temperature and 74°F low temperature. The wind is currently blowing at 8 miles per hour, and coming from the South Southwest. The wind is gusting to 8 mph. With the wind and the atmosphere the temperature feels like 76° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 66 percent, and air pressure at 30.04 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON WEDNESDAY TO 8 PM EDT SATURDAY...
WHAT: Dangerously hot conditions with heat index values between
100 and 110 degrees expected each day.
WHERE: Portions of northern Delaware, central and southern New
Jersey, and southeast Pennsylvania.
WHEN: From noon Wednesday to 8 PM EDT Saturday.
IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.
ADDITIONAL DETAILS: Very warm low temperatures in the mid 70s to
low 80s at night will not offer any relief from the heat. This
combined with multiple days of near record breaking temperatures
will exacerbate the impacts from the heat and humidity. The
hottest conditions are expected to occur Thursday through Friday.
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.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
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.
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