Water Temperature of Delaware Bay in Greenwich, NJ

Current Water Temperature

75.9°F

Measurement Time: Thursday, June 18, 2026, 11:06 PM EDT

Today's Tides

 High: June 18, 12:53 AM, 6.8 ft
Low: June 18, 7:47 AM, -0.2 ft
 High: June 18, 1:34 PM, 5.5 ft
Low: June 18, 7:48 PM, 0.2 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

80.1°F
Clear
Clear
80.7°F
80.5°F
47%
W 9.8 mph
20.7 mph
79.6°F
57.1°F
0 in
0%
9 mi
1005 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 96°F
L: 70°F
Patchy rain nearby
Fri
H: 79°F
L: 68°F
Sunny
Sat
H: 79°F
L: 59°F
Sunny
Sun
H: 82°F
L: 59°F
Heavy rain
Mon
H: 87°F
L: 64°F

Air Quality

AQI: 1 - Good
PM2.5: 6 μg/m3
PM10: 6.4 μg/m3
Carbon Monoxide: 137 μg/m3
Nitrogen Dioxide: 5.7 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:02 PM
Sunset: 8:31 PM
Daylight: 14 hrs 57 mins
Moonrise: 9:27 AM
Moon Transit: 4:42 PM
Moonset: 12:12 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:47 AM - 8:17 AM
4:12 PM - 6:42 PM

Minor Periods

8:57 AM - 10:27 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Small Craft Advisory issued June 18 at 2:56PM EDT until June 19 at 12:00AM EDT by NWS Mount Holly NJ

Effective: Thu June 18, 2026, 2:56 PM
Expires: Fri June 19, 2026, 12:00 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 30 kt and choppy waters. * WHERE...Delaware Bay waters north of East Point NJ to Slaughter Beach DE and Delaware Bay waters south of East Point NJ to Slaughter Beach DE. * WHEN...Until midnight EDT tonight. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Brief gale force wind gusts near 35 kt will remain possible across the Delaware Bay this afternoon. Any thunderstorms that develop could also produce brief gale force wind gusts during the afternoon and evening hours.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
95.9°F
69.6°F
82.3°F
60%
0.01 in
36%
0%
23.5 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 6.03 μg/m3
PM10: 6.55 μg/m3
Carbon Monoxide: 128.38 μg/m3
Nitrogen Dioxide: 4.2 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 96.79 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:02 PM
Sunset: 8:31 PM
Daylight: 14 hrs 57 mins
Moonrise: 9:27 AM
Moon Transit: 4:42 PM
Moonset: 12:12 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:47 AM - 8:17 AM
4:12 PM - 6:42 PM

Minor Periods

8:57 AM - 10:27 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Friday, June 19, 2026

Weather Forecast

Patchy rain nearby
79.4°F
67.6°F
74.1°F
55%
0.06 in
57%
0%
13.4 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 4.33 μg/m3
PM10: 4.48 μg/m3
Carbon Monoxide: 129.13 μg/m3
Nitrogen Dioxide: 4.59 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 85.42 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:02 PM
Sunset: 8:31 PM
Daylight: 14 hrs 57 mins
Moonrise: 10:41 AM
Moon Transit: 5:32 PM
Moonset: 12:44 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
5:02 PM - 7:32 PM

Minor Periods

10:11 AM - 11:41 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, June 20, 2026

Weather Forecast

Sunny
78.8°F
59.1°F
70°F
53%
0 in
3%
0%
15.7 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 4.68 μg/m3
PM10: 4.83 μg/m3
Carbon Monoxide: 116.83 μg/m3
Nitrogen Dioxide: 3.62 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 80.17 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:03 PM
Sunset: 8:32 PM
Daylight: 14 hrs 57 mins
Moonrise: 11:49 AM
Moon Transit: 6:17 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 27.8%

Best Times for Fishing or Hunting

Major Periods

7:25 AM - 9:55 AM
5:47 PM - 8:17 PM

Minor Periods

11:19 AM - 12:49 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, June 21, 2026

Weather Forecast

Sunny
81.9°F
59.4°F
70.7°F
55%
0 in
3%
0%
11.2 mph
9.3


Air Quality

AQI: 1 - Good
PM2.5: 6.94 μg/m3
PM10: 7.3 μg/m3
Carbon Monoxide: 125.58 μg/m3
Nitrogen Dioxide: 7.51 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 88.29 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:03 PM
Sunset: 8:32 PM
Daylight: 14 hrs 57 mins
Moonrise: 12:55 AM
Moon Transit: 7:01 PM
Moonset: 12:35 AM
Moon Phase: First Quarter
Moon Illumination: 38.5%

Best Times for Fishing or Hunting

Major Periods

8:10 AM - 10:40 AM
6:31 PM - 9:01 PM

Minor Periods

12:25 AM - 1:55 PM
12:05 AM - 1:35 AM

Action Rating: 3 out of 5

Monday, June 22, 2026

Weather Forecast

Heavy rain
86.7°F
64.2°F
71.9°F
80%
0.96 in
83%
0%
21 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 5.75 μg/m3
PM10: 6.41 μg/m3
Carbon Monoxide: 122.8 μg/m3
Nitrogen Dioxide: 4.61 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 94.83 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:03 PM
Sunset: 8:32 PM
Daylight: 14 hrs 57 mins
Moonrise: 1:58 PM
Moon Transit: 7:43 PM
Moonset: 12:57 AM
Moon Phase: First Quarter
Moon Illumination: 49.7%

Best Times for Fishing or Hunting

Major Periods

8:52 AM - 11:22 AM
7:13 PM - 9:43 PM

Minor Periods

1:28 PM - 2:58 PM
12:27 AM - 1:57 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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