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Surf Forecasts:
Arniston surfForecast / Overberg / South Africa
16 Day Weather and Surf, issued 1 pm Tuesday 21 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
19.6° C
(Which is 1.6°C warmer than normal for this time of year)Best Forecast Surf Conditions for Arniston this week:
The surf forecast for Arniston over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Apr 21) at 8PM. The primary swell is predicted to be 4.0m and 12s period with a secondary swell of 3.0m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Arniston in the next 16 days are 4.0m 16s and forecast to arrive on Wednesday (Apr 22) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Sunday (Apr 26) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 21st Apr) | 13ft (4.0m) 12s |
| Best Surf | 8PM (Tue 21st Apr) | 13ft (4.0m) 12s |
| Most Powerful | 11AM (Wed 22nd Apr) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Arniston over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Light rain (total 3mm), mostly falling on Tue afternoon. Warm (max 21°C on Fri morning, min 14°C on Thu morning). Winds decreasing (strong winds from the E on Thu night, light winds from the NE by Fri morning). | Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Sun night. Warm (max 25°C on Fri afternoon, min 15°C on Sun night). Winds increasing (calm on Fri night, fresh winds from the S by Sun night). | ||||||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 12 | 13 | 16 | 16 | 15 | 14 | 13 | 8 | 8 | 8 | 9 | 8 | 9 | 9 | 8 | 9 | 8 | 8 | 8 | 11 | 12 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 2728 | 4538 | 7033 | 6520 | 3731 | 1949 | 1003 | 558 | 350 | 333 | 264 | 177 | 199 | 122 | 51 | 1015 | 402 | 190 | 144 | 576 | 683 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross | cross- on | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | on | cross- on | ||
High Tide / height (m) | 6:04PM 1.60 | 6:23AM 1.56 | 7:06PM 1.45 | 7:33AM 1.37 | 8:38PM 1.35 | 9:22AM 1.26 | 10:29PM 1.38 | 11:10AM 1.29 | 11:46PM 1.50 | 12:17PM 1.40 | 12:36AM 1.63 | 1:02PM 1.51 | 1:14AM 1.73 | 1:39PM 1.60 | |||||||||
Low Tide / height (m) | 12:10AM 0.45 | 12:45PM 0.45 | 1:21AM 0.62 | 2:03PM 0.60 | 3:13AM 0.71 | 3:53PM 0.65 | 5:09AM 0.65 | 5:24PM 0.59 | 6:19AM 0.52 | 6:23PM 0.50 | 7:05AM 0.39 | 7:06PM 0.41 | 7:40AM 0.28 | ||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||||
| Sunrise | - | - | 7:07 | - | - | 7:07 | - | - | 7:07 | - | - | 7:09 | - | - | 7:09 | - | - | 7:11 | - | - | 7:11 | ||
| Sunset | 6:07 | - | - | 6:07 | - | - | 6:06 | - | - | 6:05 | - | - | 6:02 | - | - | 6:01 | - | - | 6:00 | - | - | ||
 |  |  |  |  | | | | | | | | | | | |  |  | | | | |||
Rain (mm) | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 1 | - | - | - | ||
| Temp. °C | 16 | 17 | 16 | 16 | 16 | 15 | 17 | 17 | 21 | 25 | 21 | 22 | 22 | 18 | 18 | 19 | 18 | 17 | 17 | 17 | 17 | ||
| Feels °C (?) | 8 | 10 | 12 | 12 | 10 | 8 | 9 | 10 | 18 | 22 | 19 | 18 | 18 | 17 | 17 | 16 | 14 | 12 | 12 | 11 | 9 | ||
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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.
Information about the Arniston Surf forecast
The above surf forecast table for Arniston provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Arniston can be found by selecting the local surf guide option on the grey menu. Our Arniston surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Arniston) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Arniston may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Overberg? If you are looking for accommodation near Arniston, camping, hotels and holiday cottages in Overberg, consider staying in Hermanus which is 97 km (60 miles) away.
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