Surf Forecasts:
Arniston surf forecast from 21 Sep 2026:
- Best quality surf: Sunday 27 Sep, 5AM (local time) - 7ft (2.1m), 7s period, S swell with cross-shore winds.
- Most powerful swell: Saturday 26 Sep, 2PM (local time) - 5ft (1.5m), 15s period, SSW swell with 911 kJ wave energy.
- Next surfable swell (1★+): Tuesday 22 Sep, 11PM (local time) - 3.5ft (1.1m), 8s period with E swell.
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 (Sep 22) at 11PM. The primary swell is predicted to be 0.7m and 12s period with a secondary swell of 1.1m and 8s. 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 1.5m 15s and forecast to arrive on Saturday (Sep 26) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Sep 26) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 22nd Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 5AM (Sun 27th Sep) | 7ft (2.1m) 7s |
| Most Powerful | 2PM (Sat 26th Sep) | 5ft (1.5m) 15s |
Table - best surf conditions forecast for Arniston over the next 16 days.
Short Range ForecastModerate rain (total 11mm), heaviest on Tue afternoon. Warm (max 25°C on Tue afternoon, min 15°C on Mon night). Winds increasing (light winds from the NNE on Tue night, fresh winds from the E by Thu morning). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Sat afternoon. Very mild (max 19°C on Fri afternoon, min 15°C on Thu night). Winds increasing (light winds from the NNE on Fri night, fresh winds from the SE by Sun afternoon). | ||||||||||||||||||
Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 14 | SSW 13 | SSW 12 | E 8 | E 8 | E 8 | SE 7 | S 16 | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 15 | SSW 14 | SW 14 | SSE 7 | SSE 7 | S 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 203 | 219 | 180 | 118 | 137 | 169 | 346 | 503 | 838 | 633 | 393 | 328 | 250 | 892 | 785 | 507 | 348 | 440 | 381 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross | on | on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on |
High Tide | 00:42AM1.35m | 1:09PM1.48m | 1:15AM1.50m | 1:36PM1.65m | 1:45AM1.64m | 2:02PM1.81m | 2:15AM1.76m | 2:30PM1.94m | 2:45AM1.85m | 2:58PM2.03m | 3:16AM1.90m | 3:28PM2.08m | 3:48AM1.91m | ||||||
Low Tide | 6:59AM0.54m | 7:21PM0.53m | 7:26AM0.40m | 7:48PM0.37m | 7:52AM0.26m | 8:15PM0.22m | 8:19AM0.16m | 8:43PM0.10m | 8:47AM0.08m | 9:12PM0.01m | 9:17AM0.05m | 9:42PM-0.02m | |||||||
 |  |  |  | | |  |  | |  | |  | | |  |  | | | | |
 | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — |
 | 6:34 | — | 6:35 | — | — | 6:35 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — |
mm | — | — | 4 | 2 | 2 | 1 | 2 | — | — | — | — | — | — | — | 11 | — | — | — | 4 |
Temp °C | 16 | 21 | 25 | 22 | 17 | 18 | 16 | 16 | 16 | 16 | 18 | 19 | 18 | 18 | 17 | 17 | 17 | 16 | 15 |
Feels °C | 11 | 20 | 25 | 23 | 15 | 16 | 15 | 11 | 11 | 14 | 19 | 19 | 18 | 19 | 17 | 16 | 15 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | E 7 | ESE 7 | E 8 | E 8 | E 8 | SW 10 | SSE 7 | SSW 14 | SSW 13 | ESE 7 | ESE 7 | SSW 12 | SSW 15 | SSW 14 | SW 14 | S 7 | SW 14 | S 8 |
| kJ | 79 | 187 | 160 | 118 | 137 | 169 | 27 | 145 | 838 | 633 | 158 | 108 | 250 | 892 | 785 | 507 | 338 | 203 | 381 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SW 11 | S 18 | S 16 | SSE 7 | — | SSW 12 | SSW 12 | SSW 16 | ESE 6 | ESE 6 | E 7 | SW 13 | S 16 | SW 13 |
| kJ | 116 | 219 | 180 | 105 | 76 | 55 | 24 | 503 | 79 | — | 393 | 328 | 206 | 57 | 45 | 38 | 212 | 5 | 113 |
Swell 3 Height (m) Direction Period (s) | SW 14 | — | S 15 | SSE 6 | SE 6 | S 10 | S 12 | SW 10 | — | — | — | — | S 10 | S 9 | S 11 | — | E 7 | — | SSE 14 |
| kJ | 203 | — | 4 | 14 | 10 | 18 | 3 | 15 | — | — | — | — | 44 | 25 | 2 | — | 26 | — | 36 |
Wind waves Height (m) Direction Period (s) | E 6 | — | — | W 2 | SW 3 | SSE 4 | SE 7 | E 8 | E 6 | ESE 7 | — | — | ESE 7 | — | SW 2 | S 5 | SSE 7 | SSE 7 | ESE 7 |
| kJ | 144 | — | — | 1 | 2 | 18 | 346 | 191 | 200 | 273 | — | — | 105 | — | 2 | 79 | 348 | 440 | 220 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 81 | 76 | 76 | 19 | 19 | 65 | 81 | 81 | 81 | 81 | 65 | 81 | 76 | 103 | 135 | 135 | 261 | 183 | 192 |
Best forecast wave conditions in Overberg | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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