8537121 - Ship John Shoal, NJ (SJSN4) — Live Marine Conditions & Buoy Data
NOAA station SJSN4, 8537121 - Ship John Shoal, NJ, reports real-time marine conditions from 39.305°N, 75.377°W in the western North Atlantic (New Jersey). Readings refresh roughly every 10 minutes, and Big Buoy adds 7-day tide predictions, a solunar table, and a multi-day weather outlook for the area.
Delaware Bay Marine Conditions — 8537121 - Ship John Shoal, NJ is one of several stations in Delaware Bay. See live tides, buoy data, and solunar for the whole area.
Current conditions at 8537121 - Ship John Shoal, NJ
As of October 19, 2026 at 20:18 UTC, 8537121 - Ship John Shoal, NJ (SJSN4) is reporting water temperature 64°F, air temperature 64°F, wind from the NNE at 14 mph gusting 15 mph, and barometric pressure 30.31 inHg.
- Water temperature
- 64°F
- Air temperature
- 64°F
- Wind
- NNE 14 mph (gust 15)
- Barometric pressure
- 30.31 inHg
Observed October 19, 2026 at 20:18 UTC from NOAA NDBC station SJSN4. Readings update about every 10 minutes.
What NOAA buoy SJSN4 measures
As a NOAA meteorological station, SJSN4 reports wind speed, gusts and direction, barometric pressure, air and water temperature, and — where wave sensors are fitted — significant wave height, swell period, and wave direction.
What to watch in the western North Atlantic
Conditions along the Atlantic coast are driven by swell direction and the shifting western edge of the Gulf Stream. Northeast winds against an outgoing tide stack up steep, dangerous seas at inlets, and water temperature can change 10–20°F over just a few miles as the Gulf Stream boundary moves.
Frequently asked questions
- What is the water temperature at NOAA buoy SJSN4?
- Sea surface temperature at NOAA buoy SJSN4 was 64°F. Measured October 19, 2026 at 20:18 UTC by NOAA station SJSN4 (8537121 - Ship John Shoal, NJ). NDBC measures this near the surface, at a depth that varies by station.
- What is the air temperature at NOAA buoy SJSN4?
- Air temperature at NOAA buoy SJSN4 was 64°F. Measured October 19, 2026 at 20:18 UTC by NOAA station SJSN4 (8537121 - Ship John Shoal, NJ).
- What is the wind doing at NOAA buoy SJSN4?
- Wind at NOAA buoy SJSN4 was from the NNE at 14 mph, with peak gusts to 15 mph. Measured October 19, 2026 at 20:18 UTC by NOAA station SJSN4 (8537121 - Ship John Shoal, NJ). NDBC records wind at the station’s anemometer height, which is not the 10 m height used in marine forecasts.
- What is the barometric pressure at NOAA buoy SJSN4?
- Sea-level pressure at NOAA buoy SJSN4 was 30.31 inHg (1026.4 hPa). Measured October 19, 2026 at 20:18 UTC by NOAA station SJSN4 (8537121 - Ship John Shoal, NJ). NDBC reports pressure reduced to sea level rather than the raw reading at the station.
- Where is NOAA buoy SJSN4 located?
- 8537121 - Ship John Shoal, NJ (SJSN4) reports from 39.305°N, 75.377°W in the western North Atlantic (New Jersey).
- How often is NOAA buoy SJSN4 updated?
- Station SJSN4 typically reports new observations about every 10 minutes. Big Buoy refreshes continuously so you always see the latest readings, alongside 7-day tide predictions and a solunar table for the area.
- What does NOAA buoy SJSN4 measure?
- Big Buoy shows wind, barometric pressure, air and water temperature, and wave height and period where available for 8537121 - Ship John Shoal, NJ, plus 7-day tides, solunar peak windows, and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for 8537121 - Ship John Shoal, NJ and every other NOAA buoy is free with no account required. Big Buoy Pro adds the Wind Tab, the Depth Chart, satellite overlays (sea surface temp, chlorophyll, currents), 16-day forecasts, and forecast model switching.