Surf Forecasts:
How big are the waves at Arniston today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 8ft (2.5m), 14s period with SSW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 7ft (2.1m), 13s period with SSW swell.
- Evening surf: Evening surf (20 Aug, local time) - 5.5ft (1.7m), 12s period with SSW swell.
The current surf forecast for Arniston at 9AM is: 2.5m 14s primary swell from a South-southwest direction and 0.3m 9s secondary swell from a East direction (forecast issued at 01:00am August 20). The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 8ft (2.5m) | 14s |
| Afternoon (20 Aug) | 7ft (2.1m) | 13s |
| Evening (20 Aug) | 5.5ft (1.7m) | 12s |
Table - waves today at Arniston. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 12°C on Thu night). Winds increasing (calm on Thu morning, fresh winds from the WSW by Sat afternoon). | ||||||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||||||||||
2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | WSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 1155 | 2136 | 2344 | 1893 | 1487 | 1227 | 905 | 787 | 655 | 644 | 521 | 423 | 517 | 427 | 373 | 373 | 366 | 319 | 506 | 469 | 361 | 350 | 443 | 546 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | glassy | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | glassy |
High Tide | 7:44AM1.17m | 8:10PM1.23m | 9:44AM1.07m | 10:34PM1.16m | 12:15PM1.15m | |||||||||||||||||||
Low Tide | 1:35AM0.69m | 1:29PM0.79m | 2:58AM0.81m | 3:27PM0.91m | 5:53AM0.79m | 6:26PM0.84m | ||||||||||||||||||
 | |  | |  | | | | | | | | | | |  |  | | | | |  | | | |
 | — | 7:13 | — | — | — | — | — | — | — | 7:11 | — | — | — | — | — | — | — | 7:11 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:10 | — | — | — | — | — | — | — | 6:12 | — | — | — | — | — | — | — | 6:12 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 16 | 17 | 17 | 15 | 14 |
Feels °C | 11 | 11 | 11 | 14 | 12 | 11 | 12 | 12 | 12 | 10 | 10 | 9 | 9 | 8 | 9 | 11 | 12 | 10 | 10 | 10 | 11 | 13 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 |
| kJ | 1155 | 2136 | 2344 | 1893 | 1487 | 1227 | 905 | 787 | 655 | 644 | 521 | 423 | 408 | 401 | 373 | 373 | 366 | 319 | 506 | 469 | 361 | 350 | 443 | 546 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | WSW 11 | WSW 11 | E 9 | E 4 | E 4 | S 14 | E 4 | E 4 | E 6 | E 6 | E 5 | E 5 |
| kJ | 16 | 15 | 15 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 517 | 427 | 6 | 13 | 8 | 140 | 3 | 1 | 5 | 5 | 5 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | E 9 | E 9 | — | E 8 | E 9 | E 9 | E 4 | E 9 | E 8 | E 8 | E 8 | E 8 | SW 16 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 6 | 6 | — | 6 | 6 | 6 | 3 | 6 | 1 | 1 | 1 | 1 | 10 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | E 3 | E 3 | ESE 4 | ESE 4 | — | — | — | W 2 | W 4 | WSW 3 | WSW 3 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | 7 | 19 | 24 | — | — | — | 1 | 20 | 5 | 3 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 76 | 76 | 76 | 113 | 135 | 81 | 76 | 76 | 76 | 81 | 81 | 81 | 93 | 81 | 76 | 0 | 0 | 0 | 133 | 133 | 19 | 103 | 0 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||||||
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