Surf Forecasts:
How big are the waves at Arniston today (21 Jul):
- Afternoon surf: Afternoon surf (21 Jul, local time) - 6ft (1.8m), 14s period with SSW swell.
- Evening surf: Evening surf (21 Jul, local time) - 5.5ft (1.7m), 13s period with SSW swell.
The current surf forecast for Arniston at 11PM is: 1.5m 13s primary swell from a South-southwest direction and 0.9m 10s secondary swell from a East-southeast direction (forecast issued at 07:00pm July 21). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jul) | - | - |
| Afternoon (21 Jul) | 6ft (1.8m) | 14s |
| Evening (21 Jul) | 5.5ft (1.7m) | 13s |
Table - waves today at Arniston. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Thu afternoon, min 11°C on Wed morning). Winds increasing (calm on Tue night, strong winds from the W by Thu afternoon). | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||
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 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SSW 11 | SSW 12 | SSW 18 | SSW 17 |
Wave Graph  | |||||||||||||||||||
 kJ | 1243 | 987 | 722 | 601 | 504 | 517 | 579 | 469 | 790 | 632 | 531 | 446 | 429 | 449 | 539 | 426 | 595 | 1435 | 4442 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on |
High Tide | 8:26PM1.42m | 9:10AM1.17m | 9:38PM1.31m | 10:52AM1.15m | |||||||||||||||
Low Tide | 3:03AM0.67m | 2:55PM0.77m | 4:31AM0.72m | 4:41PM0.83m | |||||||||||||||
 |  |  | | | | | | | | | |  |  | |  | | | | |
 | — | — | — | — | 7:39 | — | — | — | — | — | — | — | 7:39 | — | — | — | — | — | — |
 | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:51 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 13 | 12 | 12 | 11 | 13 | 15 | 15 | 14 | 13 | 12 | 12 | 12 | 14 | 16 | 14 | 14 | 14 |
Feels °C | 14 | 13 | 12 | 11 | 11 | 9 | 11 | 11 | 10 | 10 | 10 | 9 | 8 | 7 | 10 | 8 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SSW 11 | SSW 12 | SSW 12 | SSW 17 |
| kJ | 1243 | 987 | 722 | 601 | 504 | 517 | 579 | 469 | 790 | 632 | 531 | 446 | 429 | 449 | 539 | 426 | 595 | 699 | 4442 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 12 | ESE 13 | SE 13 | ESE 12 | ESE 12 | SSW 20 | SSW 18 | SE 12 |
| kJ | 242 | 216 | 157 | 139 | 78 | 110 | 135 | 135 | 105 | 105 | 105 | 90 | 147 | 164 | 101 | 98 | 221 | 1435 | 69 |
Swell 3 Height (m) Direction Period (s) | W 9 | W 9 | W 9 | — | ESE 11 | — | SE 15 | S 14 | SW 12 | SW 12 | SW 12 | SE 14 | SSE 8 | — | — | SSW 21 | ESE 12 | ESE 12 | — |
| kJ | 6 | 6 | 6 | — | 85 | — | 9 | 107 | 38 | 40 | 40 | 47 | 6 | — | — | 45 | 98 | 96 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 3 | — | WSW 3 | W 3 | NW 2 | NW 3 | NW 3 | W 3 | WSW 4 | — | — | — |
| kJ | — | — | — | — | — | — | — | 5 | — | 3 | 3 | 2 | 1 | 2 | 7 | 21 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 103 | 0 | 0 | 0 | 0 | 0 | 0 | 65 | 65 | 19 | 0 | 0 | 65 | 105 | 105 | 65 | 103 | 81 | 135 |
Best forecast wave conditions in Overberg | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Arniston surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest