Buoy guide
How NOAA and NDBC buoys help surfers read the ocean
NOAA and NDBC stations are public ocean-observation infrastructure. For surfers, the useful part is not simply that a station exists; it is whether that station reports wave height, period, direction and recent observation time.
A buoy reading is an observation, not a forecast
A wave buoy measures conditions at a real offshore point. That makes it different from a forecast model: the buoy can confirm that a swell actually reached the water, whether it is building, holding or fading.
SwellOracle uses those observations as the strongest signal when a station reports useful wave data. The reading still needs local interpretation because a beach can be sheltered, shadowed or exposed differently from the buoy.
The surf variables that matter most
Wave height gives a size signal, period gives an energy and organization signal, and direction tells you which coasts can receive the swell. Water temperature and wind are useful context, but they do not replace height, period and direction.
When a station does not report wave variables, SwellOracle keeps it separate from alert-ready surf stations so users do not build alerts on the wrong kind of data.
Why nearby is not always better
The closest station is not always the best surf reference. A DART or weather station may be nearby but missing wave period. A wave buoy farther offshore can be more useful if it reports the swell component you need.
A good surf reading combines buoy position, exposure, swell direction and local coastline shape. SwellOracle tries to make that distinction visible rather than presenting every marine station as equal.
Practical takeaway
Use NOAA/NDBC buoys as real confirmation of offshore energy, then compare the reading with exposure, tide, wind and local knowledge.