Height
How much offshore wave energy is measured or estimated at the source location.
SwellOracle Academy
Check the ocean before you go.
A better surf decision rarely comes from one number. Use this short checklist to turn data into a clear, responsible plan before you leave for the beach.
1. Check the source and timestamp
Open the buoy or model page and identify whether it is a physical observation or an estimate. Check when it was updated; a stale reading can explain the past, but should not be treated as the sea right now.
If you compare stations, make sure their timestamps are close enough to describe the same changing window.
2. Read the swell as a group
Period
How widely spaced the energy is and whether the sea may include more organized swell or shorter wind sea.
Direction
Whether the incoming angle can reach your coast, point, reef or bay.
3. Add wind, tide and local exposure
Check whether wind data comes from the buoy, a model or a local coastal observation. Compare wind direction and strength with the beach orientation, then review tide and the way the spot changes through the day.
A good offshore buoy reading can still lead to poor surf at a protected beach, during strong onshore wind or at an unsuitable tide.
4. Finish with safety and a fallback
Read official marine warnings and weather information. Check visible local conditions when possible, tell someone where you are going and choose a conservative option when the sea is changing or your confidence is low.
A fallback can be another spot, a different time or simply not entering the water. That is not a failed forecast; it is good decision-making.
Practical takeaway
Check the source, time, swell, wind, tide and official information together; if the picture is unclear, choose the safer plan.