Surf Forecasts:
Arniston surf forecast from 16 Sep 2026:
- Most powerful swell: Sunday 20 Sep, 11AM (local time) - 5.5ft (1.7m), 13s period, SW swell with 969 kJ wave energy.
Best Forecast Surf Conditions for Arniston this week:
The most powerful waves expected at Arniston in the next 16 days are 1.7m 13s and forecast to arrive on Sunday (Sep 20) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 4s period and expected on Wednesday (Sep 23) at 5AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sun 20th Sep) | 5.5ft (1.7m) 13s |
Table - best surf conditions forecast for Arniston over the next 16 days.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed morning. Very mild (max 16°C on Fri afternoon, min 14°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Sun morning. Very mild (max 18°C on Mon afternoon, min 15°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
AM | PM | 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 | SW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 13 | ESE 7 | ESE 8 | ESE 8 | SSW 14 | SW 13 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 8 | ESE 8 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 507 | 352 | 587 | 436 | 530 | 399 | 261 | 421 | 432 | 392 | 394 | 774 | 969 | 493 | 597 | 432 | 363 | 498 | 454 | 389 | 238 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | on | on |
High Tide | 5:49PM1.55m | 6:09AM1.37m | 6:19PM1.38m | 6:46AM1.21m | 7:01PM1.21m | 8:23AM1.08m | 9:36PM1.10m | 11:47AM1.14m | 11:55PM1.20m | 12:38PM1.31m | 00:42AM1.35m | 1:09PM1.48m | 1:15AM1.50m | ||||||||
Low Tide | 11:34AM0.47m | 00:00AM0.51m | 12:01PM0.62m | 00:33AM0.67m | 12:36PM0.78m | 1:34AM0.81m | 2:13PM0.93m | 5:06AM0.83m | 6:07PM0.85m | 6:25AM0.69m | 6:52PM0.70m | 6:59AM0.54m | 7:21PM0.53m | ||||||||
 |  |  | | |  | | | |  |  |  | |  | | | | | | |  | |
 | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — |
 | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:32 | — | — | 6:34 | — | — | 6:35 | — |
mm | 1 | — | 2 | — | — | — | — | — | — | 1 | — | 1 | 2 | — | 1 | — | — | — | — | — | — |
Temp °C | 15 | 14 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 18 | 17 | 18 | 18 | 17 |
Feels °C | 9 | 9 | 7 | 8 | 8 | 9 | 8 | 9 | 10 | 11 | 10 | 12 | 11 | 13 | 15 | 15 | 15 | 15 | 15 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 13 | SSW 12 | SW 12 | SW 12 | SSW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | E 8 | ESE 8 | ESE 9 |
| kJ | 507 | 352 | 587 | 436 | 530 | 399 | 261 | 421 | 320 | 205 | 147 | 774 | 465 | 286 | 224 | 175 | 144 | 45 | 341 | 389 | 238 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 10 | S 8 | E 10 | E 10 | E 10 | SSW 14 | — | — | SW 15 | SSW 15 | — | SW 13 | — | — | — | SSW 15 | SSW 14 | SSW 13 | SSW 11 | SW 10 |
| kJ | 110 | 75 | 149 | 52 | 50 | 34 | 116 | — | — | 55 | 85 | — | 969 | — | — | — | 43 | 68 | 192 | 145 | 53 |
Swell 3 Height (m) Direction Period (s) | WSW 9 | SW 8 | E 10 | — | — | — | — | — | — | — | SSW 18 | — | — | — | — | — | — | SSW 9 | SSW 13 | WSW 11 | S 11 |
| kJ | 52 | 18 | 75 | — | — | — | — | — | — | — | 63 | — | — | — | — | — | — | 26 | 116 | 90 | 37 |
Wind waves Height (m) Direction Period (s) | S 7 | S 7 | SE 6 | SE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 8 | — | WSW 4 |
| kJ | 114 | 131 | 161 | 226 | 155 | 142 | 230 | 332 | 432 | 392 | 394 | 434 | 493 | 493 | 597 | 432 | 363 | 498 | 454 | — | 54 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 183 | 226 | 139 | 246 | 1298 | 81 | 184 | 1889 | 189 | 197 | 317 | 227 | 192 | 246 | 81 | 81 | 184 | 81 | 81 | 81 | 81 |
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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