Wave forecast
Use predicted height, period and direction to identify the likely swell window.
SwellOracle Academy
Turn a marine forecast into a surf decision.
A marine forecast is most useful when you connect the forecast window with a recent observation and the coastline you actually plan to surf.
Start with the forecast window
Check the forecast date, update time and basin before reading the numbers. A wave forecast describes expected conditions, while a buoy shows what an instrument recently measured offshore.
Combine three sources
Physical buoy
Use a recent NOAA/NDBC or regional observation to confirm whether the signal is arriving.
Marine model
Use a model point for regional context when no physical buoy is close to the coast.
Read sea conditions at the coast
Wind, tide, coastline orientation and local shelter can change what reaches a surf spot. A strong offshore swell does not guarantee clean waves at every beach.
Compare height, period and direction together, then check official warnings and visible local conditions before entering the water.
Practical takeaway
Use a marine forecast to plan a window, a buoy to confirm the offshore signal and local conditions to decide whether the surf is actually worth entering.