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Surf Forecasts:
Arniston surfForecast / Overberg / South Africa
48hr Weather and Surf, issued 1 am Saturday 18 Apr 2026 SASTForecast update in hr min s Forecast update imminent
Arniston surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Arniston sea temperature is
20.1° C
(Which is 1.9°C warmer than normal for this time of year)How big are the waves at Arniston today?
The current surf forecast for Arniston at 6AM is: 1.8m 12s primary swell from a Southwest direction and 0.9m 15s secondary swell from a South-southwest direction (forecast issued at 01:00am April 18). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 7ft (2.1m) | 12s |
| Afternoon (18 Apr) | 6ft (1.9m) | 11s |
| Evening (18 Apr) | 5ft (1.5m) | 10s |
Table - waves today at Arniston. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
| 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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 13 | 10 | 9 | 12 | 12 | 11 | 11 | 12 | 12 | 12 | 16 | 15 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 391 | 494 | 808 | 1138 | 1134 | 838 | 807 | 548 | 386 | 154 | 120 | 192 | 389 | 478 | 974 | 675 | 792 | 945 | 851 | 2271 | 2070 | 2118 | 2060 | 1797 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | off | off | off | off | off | off | off | off | cross- off | cross- off | cross- off | off | off | off | off | off | off | off | off | off | off | off |
High Tide / height (m) | 3:27AM 2.12 | 3:54PM 1.93 | 4:06AM 2.07 | 4:33PM 1.86 | 4:47AM 1.95 | 5:16PM 1.75 | ||||||||||||||||||
Low Tide / height (m) | 9:16PM 0.04 | 9:46AM -0.09 | 9:54PM 0.07 | 10:24AM -0.02 | 10:34PM 0.15 | 11:05AM 0.10 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:05 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:12 | - | - | - | - | - | - | - | 6:10 | - | - | - | - | - | - | - | 6:08 | - |
 |  | |  |  |  | |  | |  | | |  | | |  | | | |  | | | | | |
Rain (mm) | - | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | 6 | 2 | 1 | 1 | 1 | 1 | 1 | - | - | - |
| Temp. °C | 14 | 16 | 15 | 14 | 17 | 19 | 19 | 18 | 17 | 16 | 15 | 15 | 19 | 20 | 16 | 13 | 14 | 13 | 14 | 14 | 16 | 17 | 17 | 15 |
| Feels °C (?) | 5 | 8 | 8 | 8 | 10 | 13 | 12 | 13 | 13 | 12 | 11 | 9 | 11 | 11 | 7 | 1 | 2 | 2 | 4 | 5 | 7 | 8 | 9 | 7 |
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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.
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