Water Temperature of the Delaware River in New Castle, DE

Current Water Temperature

76.8°F

Measurement Time: Sunday, June 28, 2026, 8:30 AM EDT

Temperature Locations

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Local Points of Interest

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

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

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 mi)
Delaware River, Middletown, DE (13.2 mi)
White Clay Creek, Landenberg, PA (13.8 mi)

Weather for New Castle, Delaware

Current Weather

77.4°F
Overcast
Overcast
80.6°F
83.8°F
71%
NE 3.8 mph
4.4 mph
79.7°F
70.6°F
0 in
100%
9 mi
1016 mbar
5.2

Five Day Weather Forecast

Overcast
Sun
H: 85°F
L: 68°F
Partly Cloudy
Mon
H: 88°F
L: 67°F
Sunny
Tue
H: 89°F
L: 67°F
Sunny
Wed
H: 98°F
L: 69°F
Sunny
Thu
H: 102°F
L: 76°F

Air Quality

AQI: 1 - Good
PM2.5: 6.5 μg/m3
PM10: 6.6 μg/m3
Carbon Monoxide: 127 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 122 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:05 PM
Sunset: 8:34 PM
Daylight: 14 hrs 58 mins
Moonrise: 8:03 PM
Moon Transit: 12:00 AM
Moonset: 4:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:30 PM - 4:00 PM

Minor Periods

7:33 PM - 9:03 PM
3:30 AM - 5:00 AM

Action Rating: 3 out of 5

Extreme Heat Watch issued June 28 at 3:57AM EDT until July 4 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Sun June 28, 2026, 3:57 AM
Expires: Sun June 28, 2026, 5:00 PM

* WHAT...Dangerously hot conditions with heat index values up to 110 degrees possible during the daytime hours. * WHERE...Atlantic, Cape May, Cumberland, and Salem Counties. * WHEN...From Wednesday afternoon through Saturday evening. The hottest conditions are forecast to occur Thursday through Friday. * 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.

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.
Sunday, June 28, 2026

Weather Forecast

Overcast
84.7°F
67.8°F
74.6°F
83%
0.01 in
41%
0%
5.1 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 9.45 μg/m3
PM10: 9.71 μg/m3
Carbon Monoxide: 139.21 μg/m3
Nitrogen Dioxide: 9.72 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 84.92 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:05 PM
Sunset: 8:34 PM
Daylight: 14 hrs 58 mins
Moonrise: 8:03 PM
Moon Transit: 12:00 AM
Moonset: 4:00 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:30 PM - 4:00 PM

Minor Periods

7:33 PM - 9:03 PM
3:30 AM - 5:00 AM

Action Rating: 3 out of 5

Monday, June 29, 2026

Weather Forecast

Partly Cloudy
88.3°F
66.6°F
75.2°F
75%
0 in
11%
0%
8.5 mph
9.4


Air Quality

AQI: 1 - Good
PM2.5: 9.49 μg/m3
PM10: 10.34 μg/m3
Carbon Monoxide: 128.08 μg/m3
Nitrogen Dioxide: 7.18 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 94.13 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:05 PM
Sunset: 8:34 PM
Daylight: 14 hrs 57 mins
Moonrise: 8:51 PM
Moon Transit: 12:26 AM
Moonset: 4:51 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:22 PM - 4:52 PM

Minor Periods

8:21 PM - 9:51 PM
4:21 AM - 5:51 AM

Action Rating: 5 out of 5

Tuesday, June 30, 2026

Weather Forecast

Sunny
89.3°F
66.6°F
77.1°F
66%
0.02 in
36%
0%
9.4 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 5.3 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 131.5 μg/m3
Nitrogen Dioxide: 7.45 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 77.17 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:05 PM
Sunset: 8:34 PM
Daylight: 14 hrs 57 mins
Moonrise: 9:30 PM
Moon Transit: 1:17 AM
Moonset: 5:48 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
3:12 PM - 5:42 PM

Minor Periods

9:00 PM - 10:30 PM
5:18 AM - 6:48 AM

Action Rating: 5 out of 5

Wednesday, July 1, 2026

Weather Forecast

Sunny
98.3°F
69.2°F
83.3°F
63%
0 in
17%
0%
8.9 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 6.75 μg/m3
PM10: 7.85 μg/m3
Carbon Monoxide: 147.54 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 99.75 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:06 PM
Sunset: 8:34 PM
Daylight: 14 hrs 56 mins
Moonrise: 10:04 PM
Moon Transit: 2:07 AM
Moonset: 6:50 AM
Moon Phase: Full
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
4:01 PM - 6:31 PM

Minor Periods

9:34 PM - 11:04 PM
6:20 AM - 7:50 AM

Action Rating: 3 out of 5

Thursday, July 2, 2026

Weather Forecast

Sunny
102.2°F
76.2°F
88.9°F
56%
0 in
2%
0%
9.6 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 7.01 μg/m3
PM10: 7.91 μg/m3
Carbon Monoxide: 222 μg/m3
Nitrogen Dioxide: 9.21 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 69.56 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:06 PM
Sunset: 8:34 PM
Daylight: 14 hrs 56 mins
Moonrise: 10:33 PM
Moon Transit: 2:55 AM
Moonset: 7:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:25 AM - 4:55 AM
4:47 PM - 7:17 PM

Minor Periods

10:03 PM - 11:33 PM
7:23 AM - 8:53 AM

Action Rating: 2 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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