Surf Forecasts:
Arniston surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 8AM (local time) - 4.5ft (1.4m), 14s period, SSW swell with cross-onshore winds.
- Most powerful swell: Sunday 6 Sep, 11AM (local time) - 6.5ft (2.0m), 18s period, SSW swell with 2,547 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 8AM (local time) - 4.5ft (1.4m), 14s period with SSW 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 Monday (Sep 07) at 8AM. The primary swell is predicted to be 2.4m and 8s period with a secondary swell of 1.4m and 14s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Arniston in the next 16 days are 2.0m 18s and forecast to arrive on Sunday (Sep 06) 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 0.4m 2s period and expected on Wednesday (Sep 09) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Mon 7th Sep) | 4.5ft (1.4m) 14s |
| Best Surf | 8AM (Mon 7th Sep) | 4.5ft (1.4m) 14s |
| Most Powerful | 11AM (Sun 6th Sep) | 6.5ft (2.0m) 18s |
Table - best surf conditions forecast for Arniston over the next 16 days.
Short Range ForecastMostly dry. Warm (max 20°C on Mon morning, min 14°C on Fri night). Winds decreasing (strong winds from the E on Sun afternoon, light winds from the ENE by Mon morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Mon afternoon, min 14°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | SE 8 | ESE 7 | ESE 7 | ESE 7 | SSW 22 | SSW 18 | SSW 16 | E 8 | E 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SSW 16 | SW 15 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 903 | 455 | 319 | 247 | 1532 | 2547 | 1631 | 1267 | 1026 | 493 | 355 | 380 | 325 | 240 | 127 | 103 | 106 | 215 | 543 | 400 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | on | glassy | on | cross | glassy | cross-off | cross-off | cross-off | cross | cross-on | cross-on |
High Tide | 8:22PM1.37m | 9:50AM1.21m | 10:37PM1.33m | 11:51AM1.34m | 00:13AM1.45m | 12:55PM1.55m | 1:11AM1.62m | 1:40PM1.75m | 1:55AM1.76m | 2:17PM1.92m | 2:33AM1.86m | 2:52PM2.03m | 3:08AM1.91m | |||||||
Low Tide | 3:13AM0.67m | 4:01PM0.77m | 5:27AM0.61m | 6:07PM0.64m | 6:42AM0.45m | 7:11PM0.44m | 7:30AM0.28m | 7:56PM0.25m | 8:09AM0.14m | 8:35PM0.11m | 8:43AM0.05m | 9:09PM0.03m | ||||||||
 |  | | | |  | | | | | | | | | | | |  | |  | |
 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — |
 | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:24 | — | — | 6:24 | — | — | 6:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 20 | 24 | 22 | 22 | 23 | 18 | 19 | 18 | 15 | 16 | 16 | 15 |
Feels °C | 7 | 7 | 9 | 8 | 9 | 9 | 6 | 7 | 18 | 22 | 21 | 21 | 21 | 18 | 17 | 15 | 14 | 16 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | S 14 | SSW 8 | S 10 | S 10 | SSW 22 | SSW 18 | SSW 16 | SSW 15 | E 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SW 15 | SSW 14 |
| kJ | 36 | 75 | 240 | 200 | 1532 | 2547 | 1631 | 924 | 725 | 493 | 355 | 380 | 325 | 240 | 127 | 103 | 106 | 79 | 543 | 400 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | S 13 | S 13 | SW 26 | SSW 10 | — | — | — | S 13 | S 13 | SSE 11 | SSE 10 | SSE 10 | S 9 | SSE 9 | SW 13 | SW 12 | SW 12 | E 9 | SW 13 |
| kJ | 64 | 53 | 14 | 27 | 123 | — | — | — | 513 | 414 | 167 | 110 | 102 | 59 | 46 | 83 | 50 | 141 | 81 | 140 |
Swell 3 Height (m) Direction Period (s) | SSW 14 | S 11 | SSW 13 | S 13 | SSW 12 | — | — | — | SW 14 | SW 13 | SSW 12 | SW 12 | SW 11 | SW 11 | SW 13 | SSE 9 | SW 14 | SSW 16 | SSE 13 | E 10 |
| kJ | 65 | 9 | 18 | 3 | 30 | — | — | — | 169 | 113 | 167 | 114 | 31 | 42 | 63 | 30 | 51 | 215 | 17 | 71 |
Wind waves Height (m) Direction Period (s) | SE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | E 7 | E 7 | E 8 | E 9 | — | — | — | — | — | — | SSW 3 | — | — | — | — |
| kJ | 903 | 455 | 319 | 247 | 331 | 488 | 691 | 1267 | 1026 | — | — | — | — | — | — | 3 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 319 | 184 | 184 | 184 | 184 | 139 | 139 | 81 | 76 | 19 | 0 | 103 | 19 | 0 | 65 | 65 | 0 | 81 | 183 | 93 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
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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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