Water Temperature of the Delaware River in New Castle, DE

Current Water Temperature

80.2°F

Measurement Time: Tuesday, August 19, 2025, 11:51 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

66°F
Light rain
Conditions: Light rain
Humidity: 96%
Feels Like: 66°F
Wind: E 6.5 mph
Wind Gusts: 9.3 mph
Pressure: 30.07 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Patchy rain nearby
Wed
H: 84°F
L: 67°F
Overcast
Thu
H: 69°F
L: 64°F
Sunny
Fri
H: 84°F
L: 60°F
Sunny
Sat
H: 80°F
L: 60°F
Sunny
Sun
H: 83°F
L: 66°F

Air Quality

PM2.5: 13.32 μg/m3
PM10: 16.84 μg/m3
Carbon Monoxide: 392.2 μg/m3
Nitrogen Dioxide: 15.91 μg/m3
Sulphur Dioxide: 3.52 μg/m3
Ozone: 51 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 1:05 PM
Sunset: 7:51 PM
Daylight: 13 hrs 31 mins
Moonrise: 3:04 AM
Moon Transit: 10:57 AM
Moonset: 6:41 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:27 AM - 12:57 AM

Minor Periods

6:11 PM - 7:41 PM
2:34 AM - 4:04 AM

Action Rating: 3 out of 5

Coastal Flood Watch issued August 19 at 5:13PM EDT until August 23 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Tue August 19, 2025, 5:13 PM
Expires: Wed August 20, 2025, 6:15 AM

* WHAT...One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE...Cumberland. * WHEN...From Thursday afternoon through late Friday night. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the Advanced Hydrologic Prediction Service at water.weather.gov/ahps for additional water level and flood impact information for your local tide gauge.


Coastal Flood Watch issued August 19 at 9:56PM EDT until August 23 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Tue August 19, 2025, 9:56 PM
Expires: Wed August 20, 2025, 11:00 AM

* WHAT...One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE...Cumberland. * WHEN...From Thursday afternoon through late Friday night. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the Advanced Hydrologic Prediction Service at water.weather.gov/ahps for additional water level and flood impact information for your local tide gauge.


Coastal Flood Watch issued August 19 at 9:56PM EDT until August 23 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Tue August 19, 2025, 9:56 PM
Expires: Wed August 20, 2025, 11:00 AM

* WHAT...One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE...Kent. * WHEN...From Thursday afternoon through late Friday night. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the Advanced Hydrologic Prediction Service at water.weather.gov/ahps for additional water level and flood impact information for your local tide gauge.


Rip Current Statement issued August 19 at 5:13PM EDT until August 21 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Tue August 19, 2025, 5:13 PM
Expires: Wed August 20, 2025, 6:15 AM

* WHAT...For the High Rip Current Risk, life-threatening rip currents. For the High Surf Advisory, large breaking waves of 6 to 9 feet expected in the surf zone on Wednesday and 7 to 11 feet on Thursday. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE...Coastal Atlantic. * WHEN...For the High Rip Current Risk, through Thursday evening. For the High Surf Advisory, from 6 AM Wednesday to 6 AM EDT Friday. For the Coastal Flood Watch, from Thursday afternoon through Friday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the Advanced Hydrologic Prediction Service at water.weather.gov/ahps for additional water level and flood impact information for your local tide gauge. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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.


High Surf Advisory issued August 19 at 5:13PM EDT until August 22 at 6:00AM EDT by NWS Mount Holly NJ

Effective: Tue August 19, 2025, 5:13 PM
Expires: Wed August 20, 2025, 6:15 AM

* WHAT...For the High Rip Current Risk, life-threatening rip currents. For the High Surf Advisory, large breaking waves of 6 to 9 feet expected in the surf zone on Wednesday and 7 to 11 feet on Thursday. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE...Coastal Atlantic. * WHEN...For the High Rip Current Risk, through Thursday evening. For the High Surf Advisory, from 6 AM Wednesday to 6 AM EDT Friday. For the Coastal Flood Watch, from Thursday afternoon through Friday evening. * IMPACTS...At this level, widespread roadway flooding occurs in coastal and bayside communities and along inland tidal waterways. Many roads become impassable. Some damage to vulnerable structures may begin to occur. Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water.

A Coastal Flood Watch means that conditions favorable for flooding are expected to develop. Be prepared to begin taking appropriate action to protect life and property. Follow the recommendations of local emergency management officials. Be sure to check the latest forecast from time to time in case a warning is issued or any new information becomes available. Visit the Advanced Hydrologic Prediction Service at water.weather.gov/ahps for additional water level and flood impact information for your local tide gauge. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. 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.


Wednesday, August 20, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 74.3°F
Average Humidity: 87%
Chance of Rain: 75%
Wind: 9.2 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 12.52 μg/m3
PM10: 16.13 μg/m3
Carbon Monoxide: 321.16 μg/m3
Nitrogen Dioxide: 11.74 μg/m3
Sulphur Dioxide: 2.8 μg/m3
Ozone: 63.8 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 1:05 PM
Sunset: 7:51 PM
Daylight: 13 hrs 31 mins
Moonrise: 3:04 AM
Moon Transit: 10:57 AM
Moonset: 6:41 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:27 AM - 12:57 AM

Minor Periods

6:11 PM - 7:41 PM
2:34 AM - 4:04 AM

Action Rating: 3 out of 5

Thursday, August 21, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 67.2°F
Average Humidity: 84%
Chance of Rain: 0%
Wind: 15.2 mph
UV Index: 1.3

Air Quality

AQI: 1 - Good
PM2.5: 13.78 μg/m3
PM10: 15.95 μg/m3
Carbon Monoxide: 314.43 μg/m3
Nitrogen Dioxide: 17.43 μg/m3
Sulphur Dioxide: 4.92 μg/m3
Ozone: 63.48 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 1:05 PM
Sunset: 7:49 PM
Daylight: 13 hrs 29 mins
Moonrise: 4:16 AM
Moon Transit: 11:52 AM
Moonset: 7:15 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

12:55 AM - 3:25 AM
11:22 AM - 1:52 PM

Minor Periods

6:45 PM - 8:15 PM
3:46 AM - 5:16 AM

Action Rating: 3 out of 5

Friday, August 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 71.4°F
Average Humidity: 55%
Chance of Rain: 0%
Wind: 8.5 mph
UV Index: 2.2

Air Quality

AQI: 1 - Good
PM2.5: 15.01 μg/m3
PM10: 15.41 μg/m3
Carbon Monoxide: 367.78 μg/m3
Nitrogen Dioxide: 17.21 μg/m3
Sulphur Dioxide: 7.34 μg/m3
Ozone: 99.44 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 1:04 PM
Sunset: 7:48 PM
Daylight: 13 hrs 26 mins
Moonrise: 5:27 AM
Moon Transit: 12:41 AM
Moonset: 7:43 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:47 AM - 4:17 AM
12:11 AM - 2:41 PM

Minor Periods

7:13 PM - 8:43 PM
4:57 AM - 6:27 AM

Action Rating: 4 out of 5

Saturday, August 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 70.1°F
Average Humidity: 64%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 2.1

Air Quality

AQI: 2 - Moderate
PM2.5: 25.81 μg/m3
PM10: 26.47 μg/m3
Carbon Monoxide: 488.97 μg/m3
Nitrogen Dioxide: 44.06 μg/m3
Sulphur Dioxide: 4.9 μg/m3
Ozone: 61.08 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 1:04 PM
Sunset: 7:46 PM
Daylight: 13 hrs 24 mins
Moonrise: 6:36 AM
Moon Transit: 1:27 PM
Moonset: 8:07 PM
Moon Phase: New
Moon Illumination: 1.4%

Best Times for Fishing or Hunting

Major Periods

2:34 AM - 5:04 AM
12:57 AM - 3:27 PM

Minor Periods

7:37 PM - 9:07 PM
6:06 AM - 7:36 AM

Action Rating: 5 out of 5

Sunday, August 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 72.4°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 0.1

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 1:04 PM
Sunset: 7:45 PM
Daylight: 13 hrs 22 mins
Moonrise: 7:41 AM
Moon Transit: 2:10 PM
Moonset: 8:29 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

3:18 AM - 5:48 AM
1:40 PM - 4:10 PM

Minor Periods

7:59 PM - 9:29 PM
7:11 AM - 8:41 AM

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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