Surf Forecasts:
How big are the waves at Arniston today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 4.5ft (1.4m), 12s period with SSW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 5ft (1.5m), 11s period with WSW swell.
- Evening surf: Evening surf (21 Aug, local time) - 4.5ft (1.3m), 11s period with SSW swell.
The current surf forecast for Arniston at 9AM is: 1.4m 12s primary swell from a South-southwest direction and 0.2m 9s secondary swell from a East direction (forecast issued at 01:00am August 21). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 4.5ft (1.4m) | 12s |
| Afternoon (21 Aug) | 5ft (1.5m) | 11s |
| Evening (21 Aug) | 4.5ft (1.3m) | 11s |
Table - waves today at Arniston. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 18°C on Sat afternoon, min 12°C on Fri morning). Winds decreasing (fresh winds from the W on Sat afternoon, calm by Sat night). | ||||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||||||||||
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 12 | SSW 12 | SSW 12 | SSW 11 | WSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 12 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SW 13 | SW 12 | SW 12 | SSW 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 655 | 644 | 521 | 423 | 517 | 427 | 319 | 373 | 366 | 256 | 429 | 433 | 361 | 217 | 500 | 624 | 575 | 527 | 464 | 386 | 253 | 428 | 428 | 378 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | glassy | on | cross-on | on | on | glassy |
High Tide | 9:44AM1.07m | 10:34PM1.16m | 12:15PM1.15m | 00:20AM1.25m | 1:09PM1.30m | |||||||||||||||||||
Low Tide | 2:58AM0.81m | 3:27PM0.91m | 5:53AM0.79m | 6:26PM0.84m | 7:01AM0.65m | 7:18PM0.70m | ||||||||||||||||||
 | |  | | | | |  | | | | | |  | |  | | | | | | | | | |
 | — | 7:11 | — | — | — | — | — | — | — | 7:11 | — | — | — | — | — | — | — | 7:09 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:12 | — | — | — | — | — | — | — | 6:12 | — | — | — | — | — | — | — | 6:13 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 12 | 13 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 17 | 18 | 17 | 15 | 15 | 14 | 14 | 13 | 13 | 14 | 14 | 13 | 13 |
Feels °C | 11 | 11 | 10 | 9 | 10 | 9 | 9 | 12 | 12 | 10 | 9 | 11 | 12 | 12 | 11 | 14 | 14 | 15 | 13 | 13 | 12 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 12 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SW 12 | SW 12 | SSW 12 |
| kJ | 655 | 644 | 521 | 423 | 408 | 401 | 319 | 373 | 366 | 256 | 429 | 433 | 361 | 217 | 500 | 624 | 575 | 527 | 464 | 386 | 229 | 428 | 428 | 378 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | WSW 11 | WSW 11 | E 9 | E 4 | E 4 | SSW 14 | E 4 | E 4 | E 8 | E 5 | E 5 | E 5 | SW 15 | SW 14 | SW 14 | WSW 13 | SW 13 | SSW 13 | SSW 13 | SSW 14 |
| kJ | 6 | 6 | 6 | 6 | 517 | 427 | 6 | 12 | 8 | 143 | 1 | 1 | 5 | 2 | 2 | 2 | 34 | 99 | 99 | 118 | 253 | 35 | 35 | 38 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 9 | E 9 | — | — | E 9 | E 9 | E 4 | E 8 | E 8 | E 8 | E 8 | E 8 | SW 16 | E 5 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
| kJ | — | — | — | 6 | 6 | — | — | 6 | 6 | 3 | 6 | 1 | 5 | 1 | 1 | 10 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | — | E 2 | E 3 | ESE 4 | E 4 | — | — | — | WSW 3 | W 3 | WSW 4 | SW 7 | WSW 4 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 1 | 4 | 14 | 16 | — | — | — | 2 | 8 | 14 | 91 | 8 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 76 | 81 | 81 | 81 | 81 | 81 | 76 | 0 | 19 | 0 | 103 | 113 | 160 | 103 | 0 | 0 | 0 | 0 | 81 | 184 | 83 | 81 | 0 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||||||
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