Water Temperature of Delaware Bay in Greenwich, NJ

Current Water Temperature

67.5°F

Measurement Time: Thursday, May 21, 2026, 8:24 PM EDT

Today's Tides

 High: May 21, 2:03 AM, 6.6 ft
Low: May 21, 9:01 AM, 0.1 ft
 High: May 21, 2:48 PM, 5.3 ft
Low: May 21, 9:03 PM, 0.5 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

Delaware Bay

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

Elevation Above Sea Level: 0 feet

Sensor Depth: -2 feet

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 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

57°F
Partly cloudy
Partly cloudy
55.3°F
56°F
87%
ENE 8.1 mph
11.4 mph
54.1°F
53.6°F
0 in
75%
9 mi
1023 mbar
3

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 73°F
L: 54°F
Moderate rain
Fri
H: 63°F
L: 51°F
Heavy rain
Sat
H: 54°F
L: 50°F
Heavy rain
Sun
H: 55°F
L: 54°F
Patchy rain nearby
Mon
H: 61°F
L: 53°F

Air Quality

AQI: 1 - Good
PM2.5: 9.45 μg/m3
PM10: 10.25 μg/m3
Carbon Monoxide: 150.85 μg/m3
Nitrogen Dioxide: 15.75 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:58 AM
Sunset: 8:14 PM
Daylight: 14 hrs 31 mins
Moonrise: 10:33 AM
Moon Transit: 6:00 PM
Moonset: 12:41 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

7:04 AM - 9:34 AM
5:30 PM - 8:00 PM

Minor Periods

10:03 AM - 11:33 AM
12:11 AM - 1:41 AM

Action Rating: 3 out of 5

Rip Current Statement issued May 21 at 3:51PM EDT until May 22 at 8:00PM EDT by NWS Mount Holly NJ

Effective: Thu May 21, 2026, 3:51 PM
Expires: Fri May 22, 2026, 5:00 AM

* WHAT...Dangerous rip currents expected. * WHERE...In Delaware, Delaware Beaches. In New Jersey, Eastern Monmouth, Atlantic Coastal Cape May, Coastal Atlantic and Coastal Ocean. * WHEN...From Friday morning through Friday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...Water temperatures are in the 50s to low 60s. These cold water temperatures can quickly cause hypothermia and physical incapacitation to anyone suddenly immersed in the water.

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.
Thursday, May 21, 2026

Weather Forecast

Patchy rain nearby
72.5°F
54.3°F
64.9°F
71%
0.05 in
92%
0%
12.5 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 7.39 μg/m3
PM10: 7.75 μg/m3
Carbon Monoxide: 163.61 μg/m3
Nitrogen Dioxide: 12.57 μg/m3
Sulphur Dioxide: 2.18 μg/m3
Ozone: 56.12 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 12:58 AM
Sunset: 8:14 PM
Daylight: 14 hrs 31 mins
Moonrise: 10:33 AM
Moon Transit: 6:00 PM
Moonset: 12:41 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

7:04 AM - 9:34 AM
5:30 PM - 8:00 PM

Minor Periods

10:03 AM - 11:33 AM
12:11 AM - 1:41 AM

Action Rating: 3 out of 5

Friday, May 22, 2026

Weather Forecast

Moderate rain
62.9°F
50.8°F
56.3°F
79%
0.48 in
84%
0%
16.3 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 9.11 μg/m3
PM10: 10.53 μg/m3
Carbon Monoxide: 140.33 μg/m3
Nitrogen Dioxide: 10.13 μg/m3
Sulphur Dioxide: 1.87 μg/m3
Ozone: 65.36 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 12:58 AM
Sunset: 8:15 PM
Daylight: 14 hrs 33 mins
Moonrise: 11:46 AM
Moon Transit: 6:51 PM
Moonset: 1:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

7:57 AM - 10:27 AM
6:21 PM - 8:51 PM

Minor Periods

11:16 AM - 12:46 AM
12:46 AM - 2:16 AM

Action Rating: 2 out of 5

Saturday, May 23, 2026

Weather Forecast

Heavy rain
53.5°F
50.4°F
52.1°F
95%
1.42 in
82%
0%
15.7 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 8.31 μg/m3
PM10: 11.07 μg/m3
Carbon Monoxide: 122.29 μg/m3
Nitrogen Dioxide: 5.05 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 76.08 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:58 AM
Sunset: 8:16 PM
Daylight: 14 hrs 34 mins
Moonrise: 12:55 AM
Moon Transit: 7:37 PM
Moonset: 1:44 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
7:07 PM - 9:37 PM

Minor Periods

12:25 AM - 1:55 PM
1:14 AM - 2:44 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Heavy rain
54.7°F
53.7°F
54.7°F
95%
0.86 in
79%
0%
18.3 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 4.62 μg/m3
PM10: 5.54 μg/m3
Carbon Monoxide: 128.91 μg/m3
Nitrogen Dioxide: 4.13 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 78.48 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 12:58 AM
Sunset: 8:16 PM
Daylight: 14 hrs 36 mins
Moonrise: 2:00 PM
Moon Transit: 8:21 PM
Moonset: 2:09 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

9:30 AM - 12:00 AM
7:51 PM - 10:21 PM

Minor Periods

1:30 PM - 3:00 PM
1:39 AM - 3:09 AM

Action Rating: 3 out of 5

Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
61°F
53.1°F
56.5°F
96%
0.16 in
89%
0%
8.5 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 7.65 μg/m3
PM10: 8.88 μg/m3
Carbon Monoxide: 151 μg/m3
Nitrogen Dioxide: 12.15 μg/m3
Sulphur Dioxide: 2.42 μg/m3
Ozone: 55.85 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:58 AM
Sunset: 8:17 PM
Daylight: 14 hrs 37 mins
Moonrise: 3:04 PM
Moon Transit: 9:02 PM
Moonset: 2:31 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

10:12 AM - 12:42 AM
8:32 PM - 11:02 PM

Minor Periods

2:34 PM - 4:04 PM
2:01 AM - 3:31 AM

Action Rating: 3 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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