Water Temperature of Delaware Bay in Greenwich, NJ

Current Water Temperature

53.8°F

Measurement Time: Tuesday, April 7, 2026, 5:12 AM EDT

Today's Tides

 High: April 7, 1:48 AM, 5.9 ft
Low: April 7, 8:36 AM, 0.5 ft
 High: April 7, 2:23 PM, 4.8 ft
Low: April 7, 8:25 PM, 0.7 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

43°F
Overcast
Overcast
37.1°F
45.5°F
93%
WNW 10.5 mph
17.6 mph
42.9°F
36.4°F
0 in
100%
9 mi
1019 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 57°F
L: 37°F
Sunny
Wed
H: 55°F
L: 30°F
Overcast
Thu
H: 46°F
L: 37°F
Sunny
Fri
H: 61°F
L: 40°F
Sunny
Sat
H: 70°F
L: 46°F

Air Quality

AQI: 1 - Good
PM2.5: 7.25 μg/m3
PM10: 7.45 μg/m3
Carbon Monoxide: 181.85 μg/m3
Nitrogen Dioxide: 9.25 μg/m3
Sulphur Dioxide: 6.15 μg/m3
Ozone: 68 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 1:03 PM
Sunset: 7:31 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:32 AM
Moon Transit: 4:58 AM
Moonset: 9:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 64.3%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
6:55 PM - 9:25 PM

Minor Periods

8:53 AM - 10:23 AM
12:02 AM - 1:32 AM

Action Rating: 3 out of 5

Freeze Watch issued April 6 at 12:15PM EDT until April 8 at 9:00AM EDT by NWS Mount Holly NJ

Effective: Mon April 6, 2026, 12:15 PM
Expires: Tue April 7, 2026, 6:00 AM

* WHAT...Sub-freezing temperatures as low as 24 possible. * WHERE...Portions of central, northern, and southern Delaware, northeast Maryland, central and southern New Jersey, and east central and southeast Pennsylvania. * WHEN...From late Tuesday night through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued April 7 at 2:19AM EDT until April 8 at 9:00AM EDT by NWS Mount Holly NJ

Effective: Tue April 7, 2026, 2:19 AM
Expires: Tue April 7, 2026, 4:00 PM

* WHAT...For the Freeze Warning, sub-freezing temperatures with lows between 25 and 30 degrees expected. For the Freeze Watch, sub-freezing temperatures with lows between 25 and 31 degrees and frost development possible. * WHERE...Portions of northern Delaware and central and southern New Jersey. * WHEN...For the Freeze Warning, from midnight tonight to 9 AM EDT Wednesday. For the Freeze Watch, from Wednesday evening through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Watch issued April 7 at 2:19AM EDT until April 9 at 9:00AM EDT by NWS Mount Holly NJ

Effective: Tue April 7, 2026, 2:19 AM
Expires: Tue April 7, 2026, 4:00 PM

* WHAT...For the Freeze Warning, sub-freezing temperatures with lows between 25 and 30 degrees expected. For the Freeze Watch, sub-freezing temperatures with lows between 25 and 31 degrees and frost development possible. * WHERE...Portions of northern Delaware and central and southern New Jersey. * WHEN...For the Freeze Warning, from midnight tonight to 9 AM EDT Wednesday. For the Freeze Watch, from Wednesday evening through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued April 7 at 2:19AM EDT until April 8 at 9:00AM EDT by NWS Mount Holly NJ

Effective: Tue April 7, 2026, 2:19 AM
Expires: Tue April 7, 2026, 4:00 PM

* WHAT...For the Freeze Warning, sub-freezing temperatures with lows between 28 and 31 degrees expected. For the Freeze Watch, sub-freezing temperatures with lows between 29 and 31 degrees and frost development possible. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. * WHEN...For the Freeze Warning, from 2 AM to 9 AM EDT Wednesday. For the Freeze Watch, from Wednesday evening through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Watch issued April 7 at 2:19AM EDT until April 9 at 9:00AM EDT by NWS Mount Holly NJ

Effective: Tue April 7, 2026, 2:19 AM
Expires: Tue April 7, 2026, 4:00 PM

* WHAT...For the Freeze Warning, sub-freezing temperatures with lows between 28 and 31 degrees expected. For the Freeze Watch, sub-freezing temperatures with lows between 29 and 31 degrees and frost development possible. * WHERE...In Delaware, Kent and Inland Sussex Counties. In Maryland, Caroline, Kent MD, Queen Annes, and Talbot Counties. * WHEN...For the Freeze Warning, from 2 AM to 9 AM EDT Wednesday. For the Freeze Watch, from Wednesday evening through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.
Tuesday, April 7, 2026

Weather Forecast

Sunny
56.8°F
36.9°F
48.4°F
53%
0 in
0%
0%
19.5 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 9.33 μg/m3
PM10: 9.7 μg/m3
Carbon Monoxide: 173.09 μg/m3
Nitrogen Dioxide: 12.53 μg/m3
Sulphur Dioxide: 4.26 μg/m3
Ozone: 72.28 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 1:03 PM
Sunset: 7:31 PM
Daylight: 12 hrs 54 mins
Moonrise: 12:32 AM
Moon Transit: 4:58 AM
Moonset: 9:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 64.3%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
6:55 PM - 9:25 PM

Minor Periods

8:53 AM - 10:23 AM
12:02 AM - 1:32 AM

Action Rating: 3 out of 5

Wednesday, April 8, 2026

Weather Forecast

Sunny
54.7°F
29.8°F
41.4°F
58%
0 in
0%
0%
12.5 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 5.09 μg/m3
PM10: 5.75 μg/m3
Carbon Monoxide: 177.01 μg/m3
Nitrogen Dioxide: 7.8 μg/m3
Sulphur Dioxide: 3.51 μg/m3
Ozone: 84.56 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:03 PM
Sunset: 7:32 PM
Daylight: 12 hrs 57 mins
Moonrise: 1:26 AM
Moon Transit: 5:49 AM
Moonset: 10:14 AM
Moon Phase: Last Quarter
Moon Illumination: 53.2%

Best Times for Fishing or Hunting

Major Periods

5:19 AM - 7:49 AM
7:46 PM - 10:16 PM

Minor Periods

9:44 AM - 11:14 AM
12:56 AM - 2:26 AM

Action Rating: 3 out of 5

Thursday, April 9, 2026

Weather Forecast

Overcast
45.5°F
36.7°F
40.3°F
85%
0 in
0%
0%
10.1 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 9.22 μg/m3
PM10: 12.76 μg/m3
Carbon Monoxide: 171.77 μg/m3
Nitrogen Dioxide: 7.71 μg/m3
Sulphur Dioxide: 2.97 μg/m3
Ozone: 91.68 μg/m3

Astronomical

Sunrise: 6:34 AM
Sun Transit: 1:03 PM
Sunset: 7:33 PM
Daylight: 12 hrs 59 mins
Moonrise: 2:14 AM
Moon Transit: 6:41 AM
Moonset: 11:11 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:11 AM - 8:41 AM
8:37 PM - 11:07 PM

Minor Periods

10:41 AM - 12:11 AM
1:44 AM - 3:14 AM

Action Rating: 3 out of 5

Friday, April 10, 2026

Weather Forecast

Sunny
60.6°F
39.5°F
49.1°F
74%
0 in
0%
0%
6.9 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 10.73 μg/m3
PM10: 14.19 μg/m3
Carbon Monoxide: 177.4 μg/m3
Nitrogen Dioxide: 7.43 μg/m3
Sulphur Dioxide: 2.75 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 6:32 AM
Sun Transit: 1:02 PM
Sunset: 7:34 PM
Daylight: 13 hrs 2 mins
Moonrise: 2:55 AM
Moon Transit: 7:31 AM
Moonset: 12:14 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

7:01 AM - 9:31 AM
9:27 PM - 11:57 PM

Minor Periods

11:44 AM - 1:14 PM
2:25 AM - 3:55 AM

Action Rating: 3 out of 5

Saturday, April 11, 2026

Weather Forecast

Sunny
70.1°F
45.6°F
54.3°F
74%
0 in
0%
0%
11.9 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 8.47 μg/m3
PM10: 10 μg/m3
Carbon Monoxide: 173.89 μg/m3
Nitrogen Dioxide: 9.6 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 70.77 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 1:02 PM
Sunset: 7:35 PM
Daylight: 13 hrs 4 mins
Moonrise: 3:29 AM
Moon Transit: 8:20 AM
Moonset: 1:18 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

7:50 AM - 10:20 AM
12:00 AM - 12:00 AM

Minor Periods

12:48 AM - 2:18 PM
2:59 AM - 4:29 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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