Surf Forecasts:
Arniston surf forecast from 17 Jul 2026:
- Best quality surf: Wednesday 22 Jul, 11PM (local time) - 8ft (2.5m), 11s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 8PM (local time) - 10ft (3.0m), 18s period, SSW swell with 5,454 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 11AM (local time) - 4ft (1.2m), 11s 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 Friday (Jul 17) at 11AM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 0.5m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Arniston in the next 16 days are 3.0m 18s and forecast to arrive on Thursday (Jul 23) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Wednesday (Jul 22) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 17th Jul) | 4ft (1.2m) 11s |
| Best Surf | 11PM (Wed 22nd Jul) | 8ft (2.5m) 11s |
| Most Powerful | 8PM (Thu 23rd Jul) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Arniston over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 18°C on Sat afternoon, min 13°C on Sun night). Winds increasing (light winds from the WNW on Fri afternoon, fresh winds from the WSW by Sun afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Wed afternoon, min 13°C on Mon night). Winds increasing (calm on Tue afternoon, fresh winds from the W by Wed afternoon). | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | SSW 11 | SSW 11 | S 13 | S 11 | S 11 | WSW 11 | SW 12 | SSW 11 | SSW 9 | SW 11 | SE 12 | ESE 11 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 12 | SSW 12 | SSW 18 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 311 | 300 | 161 | 202 | 160 | 422 | 236 | 396 | 329 | 172 | 268 | 227 | 512 | 1017 | 1028 | 649 | 591 | 558 | 1170 | 3503 | 3428 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross | cross-off | off | off | off | cross-off | cross | cross-off |
High Tide | 5:34PM1.93m | 5:48AM1.69m | 6:13PM1.84m | 6:28AM1.55m | 6:53PM1.71m | 7:11AM1.41m | 7:35PM1.56m | 8:00AM1.28m | 8:26PM1.42m | 9:10AM1.17m | 9:38PM1.31m | 10:52AM1.15m | 11:12PM1.28m | ||||||||
Low Tide | 11:18AM0.09m | 11:52PM0.22m | 11:55AM0.20m | 00:33AM0.33m | 12:32PM0.34m | 1:16AM0.45m | 1:09PM0.49m | 2:03AM0.57m | 1:53PM0.64m | 3:03AM0.67m | 2:55PM0.77m | 4:31AM0.72m | 4:41PM0.83m | ||||||||
 | |  |  | |  |  | | | | | | | | | | | | | | | |
 | 7:43 | — | — | 7:41 | — | — | 7:41 | — | — | 7:41 | — | — | 7:41 | — | — | 7:39 | — | — | 7:39 | — | — |
 | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 16 | 16 | 18 | 16 | 17 | 17 | 15 | 14 | 15 | 15 | 14 | 17 | 15 | 15 | 19 | 16 | 14 | 16 | 15 |
Feels °C | 14 | 17 | 16 | 14 | 15 | 14 | 11 | 11 | 13 | 13 | 12 | 12 | 12 | 17 | 15 | 12 | 12 | 11 | 12 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 11 | SW 10 | S 11 | S 11 | S 11 | SW 12 | SSW 11 | SSW 9 | S 8 | SE 12 | ESE 11 | SSW 14 | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 12 | SSW 12 | SSW 18 | SSW 16 |
| kJ | 311 | 300 | 96 | 202 | 160 | 281 | 236 | 396 | 329 | 140 | 268 | 227 | 512 | 1017 | 1028 | 649 | 591 | 558 | 1170 | 3503 | 3428 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 10 | S 13 | SW 9 | SW 9 | SW 12 | SSE 9 | SE 9 | SE 10 | SW 11 | S 8 | SW 8 | ESE 12 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | SE 10 | SSW 22 | SSW 12 | SE 12 |
| kJ | 55 | 35 | 161 | 83 | 117 | 248 | 130 | 106 | 113 | 172 | 80 | 39 | 231 | 219 | 151 | 99 | 64 | 28 | 181 | 680 | 34 |
Swell 3 Height (m) Direction Period (s) | — | S 14 | S 7 | E 10 | SSW 13 | E 10 | SSE 10 | SSE 10 | SSW 12 | SE 10 | SW 10 | S 16 | SSE 6 | E 10 | — | E 10 | — | ESE 14 | SE 12 | SE 12 | — |
| kJ | — | 16 | 39 | 32 | 106 | 31 | 21 | 32 | 52 | 92 | 142 | 126 | 8 | 8 | — | 2 | — | 18 | 35 | 35 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | WSW 11 | W 4 | — | — | — | — | — | — | — | — | NW 3 | WSW 4 | W 3 | — | — | — |
| kJ | — | — | — | — | — | 422 | 13 | — | — | — | — | — | — | — | — | 2 | 41 | 5 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 19 | 0 | 103 | 135 | 0 | 0 | 19 | 0 | 0 | 93 | 0 | 0 | 65 | 0 | 0 | 127 | 76 |
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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