St. Johns River Entrance
Mayport · Atlantic coast
Check St. Johns River Entrance nowNWS advisories, tides and ebb, sun and moon. Free, no sign-up.Current in the inlet
NOAA publishes current predictions for this inlet (St. Johns River Entrance, between jetties, station SJR9801). The ebb sets toward 81° (east); typical peak ebb 2 kn, up to 2.5 kn at spring tides.
Ebb against swell on the bar
Swell and wind from the east meet the ebb head on: waves get shorter and steeper and can break on the bar. The same swell on the flood is usually far easier. The app compares the hour-by-hour current with the forecast waves and wind to rate each hour.
Bar depth used to estimate wave steepening: about 12 m (39 ft). Sandbars move: this is not a chart and never says where to cross.
Local notes
- Commercial and Navy traffic.
Hour by hour, 48 hours ahead
The app rates every hour of the next 48 for St. Johns River Entrance: Lower risk, Caution, Hazardous or Extreme, with waves on the bar, wind, current and the inlet map. Free trial of Pro for 7 days.
Data for this inlet
- NWS marine forecast, zone AMZ452
- NOAA tide predictions: Little Talbot Island
- NOAA tide predictions: Mayport (Bar Pilots Dock)
- NOAA current predictions: St. Johns River Entrance, between jetties
- NDBC buoy 41112 (waves, 35 km away)
- Wind observations: station MYPF1
- Airport weather: KNRB, KCRG