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Cheswold, DE Marine Weather Forecast

Station SJSN4 - 8537121 - Ship John Shoal, NJ

August 18, 2026 12:48 am EDT
Location: 39.305N 75.377W
Wind Direction: WSW (250°)
Wind Speed: 8.0 knots
Wind Gust: 8.9 knots
Atmospheric Pressure: 29.85 in (1010.7 mb)
Water Temperature: 81.5°F (27.5°C)


Tonight - 72°F
Aug 17, 2026
0 mph
Partly Cloudy
Partly cloudy, with a low around 72. West wind around 0 mph. New rainfall amounts less than a tenth of an inch possible.
Tuesday - 88°F
Aug 18, 2026
5 mph N
Sunny
Sunny, with a high near 88. North wind around 5 mph.
Tuesday Night - 68°F
Aug 18, 2026
0 to 5 mph NW
Mostly Clear
Mostly clear, with a low around 68. Northwest wind 0 to 5 mph.
Wednesday - 88°F
Aug 19, 2026
0 to 5 mph W
Sunny
Sunny, with a high near 88. West wind 0 to 5 mph.
Wednesday Night - 71°F
Aug 19, 2026
0 to 5 mph SW
Partly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 71. Southwest wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday - 86°F
Aug 20, 2026
0 to 5 mph W
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Thursday Night - 69°F
Aug 20, 2026
0 to 5 mph N
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.
Friday - 83°F
Aug 21, 2026
5 mph NE
Chance Rain Showers
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 50%.
Friday Night - 69°F
Aug 21, 2026
0 to 5 mph E
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Saturday - 82°F
Aug 22, 2026
5 mph E
Rain Showers Likely
Rain showers likely before 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Saturday Night - 69°F
Aug 22, 2026
0 to 5 mph S
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Sunday - 83°F
Aug 23, 2026
5 mph SW
Chance Rain Showers
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Sunday Night - 66°F
Aug 23, 2026
5 mph W
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 66. Chance of precipitation is 40%.
Monday - 83°F
Aug 24, 2026
5 to 10 mph W
Slight Chance Rain Showers
A slight chance of rain showers after 8am. Sunny, with a high near 83.

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