Ship john shoal
NDBC buoy sjsn4
Observed , 51 minutes ago
Elevated
Moderate W winds at 12 kn gusting to 16 kn. Pressure falling at 1,015.5 mbar. Water 60°F, air 54°F. Next low tide at 3:30 PM (0 ft). Rest of Today: W winds 10 to 15 kt with gusts up to 20 kt.
It tells you it is rough now. The app tells you before it gets rough, with alerts at the wind and wave limits you set.
Get Buoycast for iPhoneWind
Speed
12kn
Gust
16kn
Direction
270° W
Trend
Steady
Last 11 hours12 to 21 kn
Air temp
54°F
49 to 54°F today
Water temp
60°F
60 to 60°F today
Pressure
1016mbar
Tendency
Easing
3 hour change
-0.5 mbar
Last 11 hours1014 to 1016 mbar
Tides
Next low
3:30 PM
0.1 ft
Then high
9:14 PM
5.7 ft
Predicted, Ship John Shoal0.1 to 6.6 ft
Zone forecast
Rest of Today
W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave detail: NW 2 ft at 3 seconds and SE 1 foot at 9 seconds.
Tonight
SW winds 10 to 15 kt, becoming W 15 to 20 kt after midnight. Seas around 2 ft. Wave detail: SW 2 ft at 3 seconds.
Mon
W winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 3 ft. Wave detail: W 3 ft at 3 seconds and SE 1 foot at 12 seconds.
Synopsis
Low pressure over the Gulf of Maine and Canadian Maritimes will lift to the north and depart tonight. Meanwhile, high pressure over the Midwest gradually builds east. Another system slides across the Northeast Monday, then high pressure slides to our south Tuesday and Wednesday. A coastal storm or nor'easter may then arrive late this week.
NWS zone Delaware Bay waters north of East Point NJ to Slaughter Beach DE
Last 24 hours
Every 3 hours, over the last 12 hours. Air 49 to 54°F, pressure 1,014 to 1,016 mbar over the same window.
4 stations within 30 NM
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Get Buoycast for iPhoneCommon questions
How often does buoy sjsn4 report?
Wind, temperature and pressure update about every 10 minutes.
Can I be notified when conditions change at buoy sjsn4?
Buoycast Pro lets you set your own limits on wind, waves or pressure and sends a threshold notification when this buoy crosses them.
Does this page show NOAA warnings for this area?
Watches, warnings, and advisories for Delaware Bay waters north of East Point NJ to Slaughter Beach DE appear alongside the conditions, here and in the app. Pro also pushes NOAA watches, warnings, and advisories when they are issued.
Can I see the forecast against what buoy sjsn4 measured?
This page shows measurements only. Buoycast Pro charts the NOAA forecast against them so you can see where the two diverge.
Can I keep buoy sjsn4 for next time?
Save it as a favorite and Buoycast opens on the buoys you run.
What this buoy measures
This buoy is not reporting waves. Conditions above come from the sensors it does carry, and the forecast, tides and sun times on this page are regional rather than measured at the buoy.
Station sjsn4
39°18'18" N 75°22'37" W · owned and maintained by NOAA NOS PORTS
Measured on the water by 1,000+ NOAA buoys. Observations from the National Data Buoy Center, forecasts and advisories from the National Weather Service. Not for navigation.