Water Temperature of Delaware Bay in Greenwich, NJ

Current Water Temperature

Current temperature data is
not available at this time.

Today's Tides

 Low: August 5, 1:51 AM, 1.06 ft
High: August 5, 7:40 AM, 4.83 ft
 Low: August 5, 1:40 PM, 0.91 ft
High: August 5, 8:01 PM, 6.21 ft

Temperature Locations

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Local Points of Interest

Ship John Shoal Lighthouse; Bombay Hook National Wildlife Refuge; Bridgeton, NJ; Sea Breeze, NJ; Smyrna, DE; Dover, DE

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Delaware Bay

Station Name: Ship John Shoal
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 0 feet / 0 meters

Sensor Depth: -2.2 feet / -0.7 meters

Nearest Address:
Ship John Shoal Lighthouse
Greenwich, NJ 08323
Cumberland County

GPS Coordinates: 39.30500, -75.37500

Nearby Water Temperatures

St. Jones River, Dover, DE (12.4 mi)
Appoquinimink River, Odessa, DE (16.9 mi)
Delaware River, Middletown, DE (17.0 mi)
Silver Lake Tributary, Townsend, DE (19.9 mi)
Chesapeake & Delaware Canal, Port Penn, DE (20.4 mi)
Murderkill River, Frederica, DE (20.8 mi)
Chesapeake and Delaware Canal, Delaware City, DE (21.6 mi)
Delaware River, New Castle, DE (27.7 mi)
Chesapeake & Delaware Canal, Chesapeake City, MD (27.8 mi)
Beaverdam Branch, Houston, DE (28.6 mi)
Christina River, Newark, DE (29.7 mi)
Christina River, Newport, DE (30.7 mi)
Christina River, Wilmington, DE (31.1 mi)
White Clay Creek, Stanton, DE (31.2 mi)
White Clay Creek, Newark, DE (31.6 mi)

Weather for Greenwich, New Jersey

Current Weather

80.1°F
Overcast
Conditions: Overcast
Humidity: 58%
Feels Like: 82.9°F
Wind: SSE 7.4 mph
Wind Gusts: 10 mph
Pressure: 30.29 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 3.6

Five Day Weather Forecast

Overcast
Tue
H: 82°F
L: 64°F
Overcast
Wed
H: 81°F
L: 68°F
Overcast
Thu
H: 78°F
L: 68°F
Overcast
Fri
H: 82°F
L: 66°F
Sunny
Sat
H: 83°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 36.45 μg/m3
PM10: 37.19 μg/m3
Carbon Monoxide: 608.65 μg/m3
Nitrogen Dioxide: 18.13 μg/m3
Sulphur Dioxide: 3.15 μg/m3
Ozone: 101 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:07 PM
Sunset: 8:09 PM
Daylight: 14 hrs 3 mins
Moonrise: 6:01 PM
Moon Transit: 10:23 PM
Moonset: 1:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

11:28 AM - 1:58 PM
12:00 AM - 12:00 AM

Minor Periods

5:31 PM - 7:01 PM
1:23 AM - 2:53 AM

Action Rating: 2 out of 5

Air Quality Alert issued August 4 at 4:48PM EDT by NWS Mount Holly NJ

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 8:48 PM
Expires: Wed August 6, 2025, 4:00 AM

The New Jersey Department of Environmental Protection has issued a Code Orange Air Quality Action Day for Ground Level Ozone, until midnight EDT tonight. An Air Quality Advisory means that air quality within the region may approach or exceed unhealthy standards. For more information on current and forecast concentrations of ground-level ozone and fine particulates, visit www.airnow.gov or www.state.nj.us/dep/airmon/ or call the New Jersey Bureau of Air Monitoring at 609-292-0138


Air Quality Alert issued August 5 at 3:45AM EDT by NWS Mount Holly NJ

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 7:45 AM
Expires: Wed August 6, 2025, 4:00 AM


Air Quality Alert issued August 4 at 4:48PM EDT by NWS Mount Holly NJ

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 8:48 PM
Expires: Wed August 6, 2025, 4:00 AM

The New Jersey Department of Environmental Protection has issued a Code Orange Air Quality Action Day for Ground Level Ozone, until midnight EDT tonight. An Air Quality Advisory means that air quality within the region may approach or exceed unhealthy standards. For more information on current and forecast concentrations of ground-level ozone and fine particulates, visit www.airnow.gov or www.state.nj.us/dep/airmon/ or call the New Jersey Bureau of Air Monitoring at 609-292-0138


Air Quality Alert issued August 5 at 3:45AM EDT by NWS Mount Holly NJ

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue August 5, 2025, 7:45 AM
Expires: Wed August 6, 2025, 4:00 AM


Air Quality Alert issued August 4 at 4:48PM EDT by NWS Mount Holly NJ

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon August 4, 2025, 8:48 PM
Expires: Wed August 6, 2025, 4:00 AM

The New Jersey Department of Environmental Protection has issued a Code Orange Air Quality Action Day for Ground Level Ozone, until midnight EDT tonight. An Air Quality Advisory means that air quality within the region may approach or exceed unhealthy standards. For more information on current and forecast concentrations of ground-level ozone and fine particulates, visit www.airnow.gov or www.state.nj.us/dep/airmon/ or call the New Jersey Bureau of Air Monitoring at 609-292-0138


Tuesday, August 5, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 73.3°F
Average Humidity: 79%
Chance of Rain: 0%
Wind: 8.1 mph
UV Index: 1.8

Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 59.56 μg/m3
PM10: 60.2 μg/m3
Carbon Monoxide: 475.01 μg/m3
Nitrogen Dioxide: 34.63 μg/m3
Sulphur Dioxide: 8.24 μg/m3
Ozone: 113.52 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:07 PM
Sunset: 8:09 PM
Daylight: 14 hrs 3 mins
Moonrise: 6:01 PM
Moon Transit: 10:23 PM
Moonset: 1:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

11:28 AM - 1:58 PM
12:00 AM - 12:00 AM

Minor Periods

5:31 PM - 7:01 PM
1:23 AM - 2:53 AM

Action Rating: 2 out of 5

Wednesday, August 6, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 73°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 1.7

Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 44.64 μg/m3
PM10: 47.18 μg/m3
Carbon Monoxide: 521.77 μg/m3
Nitrogen Dioxide: 17.4 μg/m3
Sulphur Dioxide: 3.19 μg/m3
Ozone: 86.72 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:07 PM
Sunset: 8:08 PM
Daylight: 14 hrs 1 mins
Moonrise: 6:49 PM
Moon Transit: 11:18 PM
Moonset: 2:49 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 94.4%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

6:19 PM - 7:49 PM
2:19 AM - 3:49 AM

Action Rating: 3 out of 5

Thursday, August 7, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 71.7°F
Average Humidity: 73%
Chance of Rain: 0%
Wind: 14.1 mph
UV Index: 2

Air Quality

AQI: 2 - Moderate
PM2.5: 34.14 μg/m3
PM10: 38.28 μg/m3
Carbon Monoxide: 433.27 μg/m3
Nitrogen Dioxide: 9.63 μg/m3
Sulphur Dioxide: 2.66 μg/m3
Ozone: 80.24 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:07 PM
Sunset: 8:07 PM
Daylight: 13 hrs 59 mins
Moonrise: 7:30 PM
Moon Transit: 12:00 AM
Moonset: 3:53 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:17 PM - 3:47 PM

Minor Periods

7:00 PM - 8:30 PM
3:23 AM - 4:53 AM

Action Rating: 3 out of 5

Friday, August 8, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 70.7°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 11.2 mph
UV Index: 2.2

Air Quality

AQI: 1 - Good
PM2.5: 12.48 μg/m3
PM10: 16.47 μg/m3
Carbon Monoxide: 279.2 μg/m3
Nitrogen Dioxide: 10.59 μg/m3
Sulphur Dioxide: 2.14 μg/m3
Ozone: 68.12 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:07 PM
Sunset: 8:05 PM
Daylight: 13 hrs 57 mins
Moonrise: 8:04 PM
Moon Transit: 12:12 AM
Moonset: 5:02 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:10 PM - 4:40 PM

Minor Periods

7:34 PM - 9:04 PM
4:32 AM - 6:02 AM

Action Rating: 4 out of 5

Saturday, August 9, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 71.5°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 11 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 14.69 μg/m3
PM10: 19.06 μg/m3
Carbon Monoxide: 328.87 μg/m3
Nitrogen Dioxide: 19.43 μg/m3
Sulphur Dioxide: 2.6 μg/m3
Ozone: 51.31 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:06 PM
Sunset: 8:04 PM
Daylight: 13 hrs 55 mins
Moonrise: 8:34 PM
Moon Transit: 1:04 AM
Moonset: 6:13 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:34 AM - 3:04 AM
3:00 PM - 5:30 PM

Minor Periods

8:04 PM - 9:34 PM
5:43 AM - 7:13 AM

Action Rating: 5 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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