Buoy guide

How to choose the right buoy for your surf spot

The best buoy for a surf spot is not always the closest point on the map. A useful station must be exposed to the same swell window, report the right variables and sit in water that represents the energy before it reaches the coast.

Start with exposure, not distance

A nearby station can be sheltered by islands or headlands while a farther offshore buoy may receive the same swell direction as your beach. Before choosing a favorite, ask whether the buoy is open to the swell angles that matter for the spot.

For example, a beach that needs southwest swell should be compared with a buoy that can actually see southwest energy. If the buoy sits behind a shadow zone, its height can understate what reaches a more exposed coast.

Check that the station reports wave variables

Some marine stations report wind, pressure or tsunami data but not wave height and period. Those stations can be useful context, but they are poor triggers for surf alerts.

SwellOracle separates wave buoys, DART stations, weather stations and model points so you can avoid building a surf decision around a station that does not measure swell.

Compare the buoy with real sessions

After picking a reference buoy, watch a few sessions. Save the reading when the spot is good, when it is too small and when it is too big. Your local threshold will become clearer after a few events.

That history is more useful than a generic rule. A 4 ft reading can be playful at one beach and too much at another.

Practical takeaway

Choose a buoy by swell exposure, useful variables and observed local behavior, not by distance alone.