Height
1.4m
Hs
Period
9s
Tp
Direction
SW
229°
Water
13.0°C
Last update: 15 Jun, 20:21
Access historical readings and compare readings with the forecast
No mandatory subscription or ads everywhere — a coffee helps keep servers running and the app improving.
Last 24 hours
Time(GMT-4) | Wave height | Max height | Period | Direction | Water temperature | Energy |
|---|---|---|---|---|---|---|
Buoy San Antonio continuously measures essential oceanographic parameters for surfing and water sports. (-33.589000° lat, -71.807000° lng)
This marine station records significant wave height, maximum height, wave period, swell direction, and water temperature.
Data for San Antonio comes from SHOA. For Chile, it is a strong reference because the source comes from the state's permanent official service for hydrography and oceanography.
The average of the highest third of waves. This is the most representative measure of the wave size you'll see on the water.
The highest wave recorded during the measurement period. Generally 1.5 to 2 times the significant height.
The time in seconds between two wave crests. A long period (>12s) indicates more powerful and consistent groundswell.
The direction the swell is coming from. The impact on the coast depends on the shoreline orientation.
Significant height (Hs) is the average of the highest third of waves, representing what you typically observe. Maximum height (Hmax) is the largest wave measured, often 1.5 to 2 times higher than Hs. A set of large waves can occasionally exceed Hs.
A long period (>12s) means waves have traveled far and carry more energy (groundswell). A short period (<8s) indicates local wind-generated swell, more disorganized. For surfing, longer periods produce more powerful and better-shaped waves.
Buoys typically transmit their data every 30 minutes to 1 hour. The delay between measurement and display depends on the transmission network and our collection system.
The buoy measures direction offshore. Waves change direction as they approach the coast due to refraction (seabed effect). Beach orientation and coastal obstacles also influence the final wave direction.
| Jun 15, 07:21 AM | 1.6m 437 kJ | 2.3m | 9.1s | 238° SW | 12.9°C | 437 kJ |
| Jun 15, 06:21 AM | 1.6m 674 kJ | 2.6m | 11.8s | 240° SW | 13.0°C | 674 kJ |
| Jun 15, 05:21 AM | 1.5m 383 kJ | 2.8m | 9.5s | 245° SW | 13.0°C | 383 kJ |
| Jun 15, 04:21 AM | 1.4m 498 kJ | 2.4m | 11.8s | 240° SW | 13.0°C | 498 kJ |
| Jun 15, 03:21 AM | 1.4m 543 kJ | 2.2m | 11.8s | 246° SW | 13.0°C | 543 kJ |
| Jun 15, 02:21 AM | 1.4m 328 kJ | 2.3m | 9.5s | 249° W | 13.0°C | 328 kJ |
| Jun 15, 01:21 AM | 1.4m 627 kJ | 2.6m | 12.5s | 250° W | 13.0°C | 627 kJ |
| Jun 15, 12:21 AM | 1.5m 718 kJ | 2.6m | 12.5s | 244° SW | 13.0°C | 718 kJ |
| Jun 14, 10:21 PM | 1.8m 846 kJ | 3.0m | 11.8s | 236° SW | 13.0°C | 846 kJ |
| Jun 14, 09:21 PM | 1.9m 806 kJ | 3.0m | 10.5s | 237° SW | 13.0°C | 806 kJ |
Height
1.4m
Hs
Period
9s
Tp
Direction
SW
229°
Water
13.0°C
Last update: 15 Jun, 20:21