Height
3.0m
Hs
Period
9s
Tp
Direction
E
92°
Water
—
Last update: 23 May, 20:05
Access historical readings and compare readings with the forecast
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Last 24 hours
Time(UTC) | Wave height | Max height | Period | Direction | Water temperature | Energy |
|---|---|---|---|---|---|---|
Buoy Collaroy Narrabeen continuously measures essential oceanographic parameters for surfing and water sports. (-33.731787° lat, 151.299067° lng)
This marine station records significant wave height, maximum height, wave period, swell direction, and water temperature.
This buoy is currently linked to the "AODN WFS" source. A fuller public source page will be added once that source is documented.
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.
| May 23, 11:05 AM | 2.8m 1298 kJ | - | 9.0s | 85° E | - | 1298 kJ |
| May 23, 10:05 AM | 2.9m 1373 kJ | - | 9.1s | 89° E | - | 1373 kJ |
| May 23, 08:05 AM | 2.8m 1213 kJ | - | 9.0s | 88° E | - | 1213 kJ |
| May 23, 07:05 AM | 2.8m 1125 kJ | - | 8.7s | 88° E | - | 1125 kJ |
| May 23, 06:05 AM | 2.6m 947 kJ | - | 8.5s | 86° E | - | 947 kJ |
| May 23, 05:05 AM | 2.6m 981 kJ | - | 8.6s | 82° E | - | 981 kJ |
| May 23, 04:05 AM | 2.4m 736 kJ | - | 8.2s | 83° E | - | 736 kJ |
| May 23, 03:05 AM | 2.1m 551 kJ | - | 7.9s | 87° E | - | 551 kJ |
| May 23, 02:05 AM | 2.0m 459 kJ | - | 7.8s | 91° E | - | 459 kJ |
| May 23, 01:05 AM | 1.8m 340 kJ | - | 7.4s | 93° E | - | 340 kJ |
Height
3.1m
Hs
Period
9s
Tp
Direction
E
89°
Water
—
Last update: 23 May, 21:05