Water Temperature of the Delaware River in New Castle, DE

Current Water Temperature

80.2°F

Measurement Time: Friday, July 31, 2026, 8:30 PM 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

73.6°F
Clear
Clear
77.5°F
78.3°F
83%
SSW 3.6 mph
7.5 mph
74.5°F
70°F
0 in
0%
10 mi
1015 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 90°F
L: 71°F
Patchy rain nearby
Sun
H: 83°F
L: 70°F
Mist
Mon
H: 76°F
L: 70°F
Mist
Tue
H: 82°F
L: 70°F
Mist
Wed
H: 80°F
L: 72°F

Air Quality

AQI: 1 - Good
PM2.5: 7.2 μg/m3
PM10: 7.3 μg/m3
Carbon Monoxide: 153 μg/m3
Nitrogen Dioxide: 19.9 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:08 PM
Sunset: 8:15 PM
Daylight: 14 hrs 14 mins
Moonrise: 9:48 PM
Moon Transit: 3:06 AM
Moonset: 8:58 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:36 AM - 5:06 AM
4:57 PM - 7:27 PM

Minor Periods

9:18 PM - 10:48 PM
8:28 AM - 9:58 AM

Action Rating: 2 out of 5

Small Craft Advisory issued July 31 at 1:48PM EDT until August 2 at 4:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 31, 2026, 1:48 PM
Expires: Fri July 31, 2026, 10:00 PM

* WHAT...South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE...Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN...From 5 PM Saturday to 4 AM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

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


Small Craft Advisory issued July 31 at 7:41PM EDT until August 2 at 4:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 31, 2026, 7:41 PM
Expires: Sat August 1, 2026, 3:45 AM

* WHAT...South winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE...Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, and Chester River to Queenstown MD. * WHEN...From 5 PM Saturday to 4 AM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Saturday, August 1, 2026

Weather Forecast

Sunny
90.3°F
71.2°F
78.4°F
72%
0 in
7%
0%
10.5 mph
8.7


Air Quality

AQI: 1 - Good
PM2.5: 6.25 μg/m3
PM10: 6.36 μg/m3
Carbon Monoxide: 144.13 μg/m3
Nitrogen Dioxide: 9.06 μg/m3
Sulphur Dioxide: 2.48 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:08 PM
Sunset: 8:15 PM
Daylight: 14 hrs 14 mins
Moonrise: 9:48 PM
Moon Transit: 3:06 AM
Moonset: 8:58 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:36 AM - 5:06 AM
4:57 PM - 7:27 PM

Minor Periods

9:18 PM - 10:48 PM
8:28 AM - 9:58 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Patchy rain nearby
83.3°F
70.4°F
76.4°F
79%
0.28 in
75%
0%
12.3 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 6.04 μg/m3
PM10: 7.9 μg/m3
Carbon Monoxide: 121 μg/m3
Nitrogen Dioxide: 3.12 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 86.92 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:08 PM
Sunset: 8:14 PM
Daylight: 14 hrs 12 mins
Moonrise: 10:10 PM
Moon Transit: 3:49 AM
Moonset: 10:02 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
5:40 PM - 8:10 PM

Minor Periods

9:40 PM - 11:10 PM
9:32 AM - 11:02 AM

Action Rating: 4 out of 5

Monday, August 3, 2026

Weather Forecast

Mist
75.7°F
70.3°F
72.9°F
95%
0.79 in
89%
0%
9.2 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 3.98 μg/m3
PM10: 4.23 μg/m3
Carbon Monoxide: 113.17 μg/m3
Nitrogen Dioxide: 7.26 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 76.38 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:08 PM
Sunset: 8:13 PM
Daylight: 14 hrs 10 mins
Moonrise: 10:33 PM
Moon Transit: 12:00 AM
Moonset: 11:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

10:03 PM - 11:33 PM
10:38 AM - 12:08 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Mist
82.3°F
69.9°F
75.3°F
88%
0.26 in
82%
0%
5.8 mph
5.1


Air Quality

AQI: 1 - Good
PM2.5: 6.88 μg/m3
PM10: 7 μg/m3
Carbon Monoxide: 137.1 μg/m3
Nitrogen Dioxide: 11.71 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 71.17 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:08 PM
Sunset: 8:12 PM
Daylight: 14 hrs 8 mins
Moonrise: 10:59 PM
Moon Transit: 5:18 AM
Moonset: 12:17 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:48 AM - 7:18 AM
7:12 PM - 9:42 PM

Minor Periods

10:29 PM - 11:59 PM
11:47 AM - 1:17 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Mist
79.6°F
72.1°F
75.4°F
89%
0.16 in
80%
0%
7.8 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 5.5 μg/m3
PM10: 6.43 μg/m3
Carbon Monoxide: 210 μg/m3
Nitrogen Dioxide: 11.1 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 47.89 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:08 PM
Sunset: 8:11 PM
Daylight: 14 hrs 6 mins
Moonrise: 11:31 PM
Moon Transit: 6:07 AM
Moonset: 1:28 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:37 AM - 8:07 AM
8:03 PM - 10:33 PM

Minor Periods

12:00 AM - 12:00 AM
12:58 AM - 2:28 PM

Action Rating: 4 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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