Water Temperature of the Delaware River in New Castle, DE

Current Water Temperature

74.8°F

Measurement Time: Monday, September 15, 2025, 4:51 PM EDT

Temperature Locations

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Local Points of Interest

Delaware Memorial Bridge; Wilmington, DE; Pennsville Township, NJ

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Delaware River

Station Name: DELAWARE RIVER AT DEL MEM BRIDGE AT WILMINGTON DE
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
I-295
New Castle, DE 19720
New Castle County

GPS Coordinates: 39.68927997, -75.521588

Nearby Water Temperatures

Christina River, Wilmington, DE (3.4 mi)
Christina River, Newport, DE (4.9 mi)
Brandywine Creek, Wilmington, DE (6.3 mi)
White Clay Creek, Stanton, DE (6.7 mi)
Red Clay Creek, Wooddale, DE (7.9 mi)
White Clay Creek, Newark, DE (8.2 mi)
Pike Creek, Newark, DE (9.3 mi)
Chesapeake & Delaware Canal, Port Penn, DE (9.4 mi)
Delaware River, Marcus Hook, PA (10.3 mi)
Chesapeake and Delaware Canal, Delaware City, DE (10.7 mi)
Christina River, Newark, DE (11.5 mi)
White Clay Creek, Newark, DE (12.1 mi)
Brandywine Creek, Chadds Ford, PA (13.0 mi)
Delaware River, Middletown, DE (13.2 mi)
White Clay Creek, Landenberg, PA (13.8 mi)

Weather for New Castle, Delaware

Current Weather

73.9°F
Overcast
Conditions: Overcast
Humidity: 46%
Feels Like: 77°F
Wind: E 6.9 mph
Wind Gusts: 11.8 mph
Pressure: 30.21 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Cloudy
Mon
H: 82°F
L: 61°F
Moderate rain
Tue
H: 68°F
L: 62°F
Moderate rain
Wed
H: 67°F
L: 60°F
Sunny
Thu
H: 85°F
L: 64°F
Sunny
Fri
H: 85°F
L: 64°F

Air Quality

AQI: 2 - Moderate
PM2.5: 17.58 μg/m3
PM10: 19.24 μg/m3
Carbon Monoxide: 382.95 μg/m3
Nitrogen Dioxide: 17.76 μg/m3
Sulphur Dioxide: 5.18 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:57 AM
Sunset: 7:10 PM
Daylight: 12 hrs 26 mins
Moonrise: 12:46 AM
Moon Transit: 7:52 AM
Moonset: 3:55 PM
Moon Phase: Last Quarter
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:22 AM - 9:52 AM
12:00 AM - 12:00 AM

Minor Periods

3:25 PM - 4:55 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Coastal Flood Advisory issued September 15 at 5:24PM EDT until September 16 at 9:00PM EDT by NWS Mount Holly NJ

Effective: Mon September 15, 2025, 5:24 PM
Expires: Tue September 16, 2025, 6:30 AM

* WHAT...Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE...Kent and Inland Sussex. * WHEN...From 3 PM to 9 PM EDT Tuesday. * IMPACTS...At this level, flooding begins on the most vulnerable roads in coastal and bayside communities, and along inland tidal waterways. Some partial or full road closures are possible.

A Coastal Flood Advisory means that minor tidal flooding is expected. Minor tidal flooding often results in some road closures. Usually, the most vulnerable roadways will flood. Do not leave your vehicle at a location that is prone to tidal flooding. Do not drive your vehicle through flood waters. The water may be deeper than you think it is. You will be putting yourself in danger and your vehicle may be damaged, leading to costly repairs. Visit the National Water Prediction Service at https://water.noaa.gov/wfo/phi for additional water level and flood impact information for your local tide gauge.


Rip Current Statement issued September 15 at 5:24PM EDT until September 16 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Mon September 15, 2025, 5:24 PM
Expires: Tue September 16, 2025, 6:30 AM

* WHAT...Dangerous rip currents expected. * WHERE...Eastern Monmouth, Atlantic Coastal Cape May, Coastal Atlantic and Coastal Ocean. * WHEN...From Tuesday morning through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...A HIGH risk of rip currents may continue through Wednesday.

Always obey posted Beach Flags. If you enter the surf zone, always have a floatation device with you and swim near a lifeguard if possible. If caught in a rip current, relax and float and do not swim against the current. If able, swim parallel to the shoreline. If unable to escape, face the shore and call or wave for help.


Rip Current Statement issued September 15 at 5:24PM EDT until September 16 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Mon September 15, 2025, 5:24 PM
Expires: Tue September 16, 2025, 6:30 AM

* WHAT...Dangerous rip currents expected. * WHERE...Eastern Monmouth, Atlantic Coastal Cape May, Coastal Atlantic and Coastal Ocean. * WHEN...From Tuesday morning through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...A HIGH risk of rip currents may continue through Wednesday.

Always obey posted Beach Flags. If you enter the surf zone, always have a floatation device with you and swim near a lifeguard if possible. If caught in a rip current, relax and float and do not swim against the current. If able, swim parallel to the shoreline. If unable to escape, face the shore and call or wave for help.


Monday, September 15, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 71.4°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 1.4

Air Quality

AQI: 2 - Moderate
PM2.5: 26.87 μg/m3
PM10: 28.05 μg/m3
Carbon Monoxide: 440.23 μg/m3
Nitrogen Dioxide: 34.28 μg/m3
Sulphur Dioxide: 6.75 μg/m3
Ozone: 82.84 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:57 AM
Sunset: 7:10 PM
Daylight: 12 hrs 26 mins
Moonrise: 12:46 AM
Moon Transit: 7:52 AM
Moonset: 3:55 PM
Moon Phase: Last Quarter
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:22 AM - 9:52 AM
12:00 AM - 12:00 AM

Minor Periods

3:25 PM - 4:55 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, September 16, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 64.7°F
Average Humidity: 85%
Chance of Rain: 73%
Wind: 15 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good
PM2.5: 13.77 μg/m3
PM10: 15.34 μg/m3
Carbon Monoxide: 360.08 μg/m3
Nitrogen Dioxide: 16.82 μg/m3
Sulphur Dioxide: 5.19 μg/m3
Ozone: 80.64 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:56 AM
Sunset: 7:08 PM
Daylight: 12 hrs 24 mins
Moonrise: 12:54 AM
Moon Transit: 8:52 AM
Moonset: 4:41 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:22 AM - 10:52 AM
12:00 AM - 12:00 AM

Minor Periods

4:11 PM - 5:41 PM
12:24 AM - 1:54 AM

Action Rating: 2 out of 5

Wednesday, September 17, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 63.4°F
Average Humidity: 87%
Chance of Rain: 81%
Wind: 12.1 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 10.8 μg/m3
PM10: 12.34 μg/m3
Carbon Monoxide: 326.04 μg/m3
Nitrogen Dioxide: 22.66 μg/m3
Sulphur Dioxide: 5.99 μg/m3
Ozone: 59.88 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:56 AM
Sunset: 7:07 PM
Daylight: 12 hrs 21 mins
Moonrise: 2:05 AM
Moon Transit: 9:46 AM
Moonset: 5:17 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:16 AM - 11:46 AM

Minor Periods

4:47 PM - 6:17 PM
1:35 AM - 3:05 AM

Action Rating: 2 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 72°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 7.2 mph
UV Index: 1.3

Air Quality

AQI: 1 - Good
PM2.5: 14.06 μg/m3
PM10: 15.27 μg/m3
Carbon Monoxide: 315.17 μg/m3
Nitrogen Dioxide: 35.98 μg/m3
Sulphur Dioxide: 10.03 μg/m3
Ozone: 49.6 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:56 AM
Sunset: 7:05 PM
Daylight: 12 hrs 19 mins
Moonrise: 3:15 AM
Moon Transit: 10:37 AM
Moonset: 5:47 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:07 AM - 12:37 AM

Minor Periods

5:17 PM - 6:47 PM
2:45 AM - 4:15 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 73.6°F
Average Humidity: 54%
Chance of Rain: 0%
Wind: 11.2 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 23.91 μg/m3
PM10: 24.14 μg/m3
Carbon Monoxide: 482.28 μg/m3
Nitrogen Dioxide: 41.92 μg/m3
Sulphur Dioxide: 8.48 μg/m3
Ozone: 44.92 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 12:55 AM
Sunset: 7:04 PM
Daylight: 12 hrs 16 mins
Moonrise: 4:24 AM
Moon Transit: 11:23 AM
Moonset: 6:11 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
10:53 AM - 1:23 PM

Minor Periods

5:41 PM - 7:11 PM
3:54 AM - 5:24 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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