Water Temperature of Delaware Bay in Greenwich, NJ

Current Water Temperature

Current temperature data is
not available at this time.

Today's Tides

High: July 14, 12:43 AM, 6.52 ft
 Low: July 14, 7:33 AM, 0.16 ft
High: July 14, 1:15 PM, 5.57 ft
 Low: July 14, 7:37 PM, 0.47 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

81°F
Sunny
Conditions: Sunny
Humidity: 77%
Feels Like: 89.4°F
Wind: SSE 10.1 mph
Wind Gusts: 15.3 mph
Pressure: 30.01 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0.9

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 80°F
L: 72°F
Moderate rain
Tue
H: 84°F
L: 73°F
Partly Cloudy
Wed
H: 87°F
L: 73°F
Moderate rain
Thu
H: 91°F
L: 75°F
Moderate rain
Fri
H: 85°F
L: 75°F

Air Quality

AQI: 2 - Moderate
PM2.5: 11.1 μg/m3
PM10: 12.95 μg/m3
Carbon Monoxide: 357.05 μg/m3
Nitrogen Dioxide: 26.27 μg/m3
Sulphur Dioxide: 2.22 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:07 PM
Sunset: 8:28 PM
Daylight: 14 hrs 41 mins
Moonrise: 10:56 PM
Moon Transit: 4:00 AM
Moonset: 9:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
5:53 PM - 8:23 PM

Minor Periods

10:26 PM - 11:56 PM
9:07 AM - 10:37 AM

Action Rating: 4 out of 5

Flood Watch issued July 14 at 2:13PM EDT until July 15 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Mon July 14, 2025, 6:13 PM
Expires: Tue July 15, 2025, 6:00 AM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northern Delaware, including the following area, New Castle, northeast Maryland, including the following areas, Kent MD, Queen Annes and Talbot, New Jersey, including the following areas, Camden, Gloucester, Northwestern Burlington, Salem, Sussex and Western Monmouth, and northeast Pennsylvania, including the following areas, Carbon and Monroe. * WHEN...Until 2 AM EDT Tuesday. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Widespread rain amounts of 1 to 2 inches are possible, with localized amounts over 3 inches possible. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flood Watch issued July 14 at 2:13PM EDT until July 15 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Mon July 14, 2025, 6:13 PM
Expires: Tue July 15, 2025, 6:00 AM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northern Delaware, including the following area, New Castle, northeast Maryland, including the following areas, Kent MD, Queen Annes and Talbot, New Jersey, including the following areas, Camden, Gloucester, Northwestern Burlington, Salem, Sussex and Western Monmouth, and northeast Pennsylvania, including the following areas, Carbon and Monroe. * WHEN...Until 2 AM EDT Tuesday. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Widespread rain amounts of 1 to 2 inches are possible, with localized amounts over 3 inches possible. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flood Watch issued July 14 at 2:13PM EDT until July 15 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Mon July 14, 2025, 6:13 PM
Expires: Tue July 15, 2025, 6:00 AM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northern Delaware, including the following area, New Castle, northeast Maryland, including the following areas, Kent MD, Queen Annes and Talbot, New Jersey, including the following areas, Camden, Gloucester, Northwestern Burlington, Salem, Sussex and Western Monmouth, and northeast Pennsylvania, including the following areas, Carbon and Monroe. * WHEN...Until 2 AM EDT Tuesday. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Widespread rain amounts of 1 to 2 inches are possible, with localized amounts over 3 inches possible. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flood Watch issued July 14 at 2:13PM EDT until July 15 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Mon July 14, 2025, 6:13 PM
Expires: Tue July 15, 2025, 6:00 AM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northern Delaware, including the following area, New Castle, northeast Maryland, including the following areas, Kent MD, Queen Annes and Talbot, New Jersey, including the following areas, Camden, Gloucester, Northwestern Burlington, Salem, Sussex and Western Monmouth, and northeast Pennsylvania, including the following areas, Carbon and Monroe. * WHEN...Until 2 AM EDT Tuesday. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Widespread rain amounts of 1 to 2 inches are possible, with localized amounts over 3 inches possible. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flood Watch issued July 14 at 2:13PM EDT until July 15 at 2:00AM EDT by NWS Mount Holly NJ

Effective: Mon July 14, 2025, 6:13 PM
Expires: Tue July 15, 2025, 6:00 AM

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of New Jersey, including the following areas, Hunterdon, Mercer, Middlesex, Morris, Somerset and Warren and Pennsylvania, including the following areas, Berks, Delaware, Eastern Chester, Eastern Montgomery, Lehigh, Lower Bucks, Northampton, Philadelphia, Upper Bucks, Western Chester and Western Montgomery. * WHEN...Until 2 AM EDT Tuesday. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Widespread rain amounts of 1 to 2 inches are possible, with localized amounts over 3 inches possible. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Monday, July 14, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 76.2°F
Average Humidity: 92%
Chance of Rain: 76%
Wind: 12.8 mph
UV Index: 2.6

Air Quality

AQI: 1 - Good
PM2.5: 9.41 μg/m3
PM10: 11.84 μg/m3
Carbon Monoxide: 277.65 μg/m3
Nitrogen Dioxide: 11.79 μg/m3
Sulphur Dioxide: 3.07 μg/m3
Ozone: 77.56 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:07 PM
Sunset: 8:28 PM
Daylight: 14 hrs 41 mins
Moonrise: 10:56 PM
Moon Transit: 4:00 AM
Moonset: 9:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
5:53 PM - 8:23 PM

Minor Periods

10:26 PM - 11:56 PM
9:07 AM - 10:37 AM

Action Rating: 4 out of 5

Tuesday, July 15, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 77.7°F
Average Humidity: 88%
Chance of Rain: 80%
Wind: 8.3 mph
UV Index: 2.3

Air Quality

AQI: 1 - Good
PM2.5: 9.19 μg/m3
PM10: 9.9 μg/m3
Carbon Monoxide: 343.8 μg/m3
Nitrogen Dioxide: 15.64 μg/m3
Sulphur Dioxide: 3.03 μg/m3
Ozone: 90.52 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:07 PM
Sunset: 8:27 PM
Daylight: 14 hrs 40 mins
Moonrise: 11:19 PM
Moon Transit: 4:46 AM
Moonset: 10:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:16 AM - 6:46 AM
12:00 AM - 12:00 AM

Minor Periods

12:00 AM - 12:00 AM
10:17 AM - 11:47 AM

Action Rating: 2 out of 5

Wednesday, July 16, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 78.8°F
Average Humidity: 87%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 2.6

Air Quality

AQI: 1 - Good
PM2.5: 14.36 μg/m3
PM10: 14.66 μg/m3
Carbon Monoxide: 317.02 μg/m3
Nitrogen Dioxide: 13.7 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 92.32 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:07 PM
Sunset: 8:27 PM
Daylight: 14 hrs 39 mins
Moonrise: 12:19 AM
Moon Transit: 1:15 AM
Moonset: 11:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

12:45 AM - 3:15 AM
12:45 AM - 3:15 AM

Minor Periods

11:27 AM - 12:57 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 17, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 81°F
Average Humidity: 82%
Chance of Rain: 87%
Wind: 13.2 mph
UV Index: 2.6

Air Quality

AQI: 2 - Moderate
PM2.5: 18.72 μg/m3
PM10: 18.91 μg/m3
Carbon Monoxide: 304.73 μg/m3
Nitrogen Dioxide: 10.48 μg/m3
Sulphur Dioxide: 4.35 μg/m3
Ozone: 106.04 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:07 PM
Sunset: 8:26 PM
Daylight: 14 hrs 37 mins
Moonrise: 12:44 AM
Moon Transit: 6:19 AM
Moonset: 1:08 PM
Moon Phase: Last Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

5:49 AM - 8:19 AM
8:15 PM - 10:45 PM

Minor Periods

12:38 AM - 2:08 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Friday, July 18, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 78.7°F
Average Humidity: 83%
Chance of Rain: 81%
Wind: 9.8 mph
UV Index: 0.2

Air Quality

AQI: 2 - Moderate
PM2.5: 16.75 μg/m3
PM10: 16.92 μg/m3
Carbon Monoxide: 453.68 μg/m3
Nitrogen Dioxide: 16.58 μg/m3
Sulphur Dioxide: 6.62 μg/m3
Ozone: 88.31 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:07 PM
Sunset: 8:26 PM
Daylight: 14 hrs 36 mins
Moonrise: 12:10 AM
Moon Transit: 7:09 AM
Moonset: 2:22 PM
Moon Phase: Last Quarter
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

6:39 AM - 9:09 AM
9:06 PM - 11:36 PM

Minor Periods

1:52 PM - 3:22 PM
12:00 AM - 12:00 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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