Surf Forecasts:
Onrus surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 2AM (local time) - 11ft (3.5m), 16s period, WSW swell with cross-onshore winds.
- Most powerful swell: Wednesday 16 Sep, 5AM (local time) - 13ft (4.0m), 15s period, SW swell with 6,389 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 8PM (local time) - 6.5ft (2.0m), 13s period with WSW swell.
Best Forecast Surf Conditions for Onrus this week:
The surf forecast for Onrus over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 10) at 8PM. The primary swell is predicted to be 2.0m and 13s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 4.0m 15s and forecast to arrive on Wednesday (Sep 16) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Sunday (Sep 13) at 5AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 10th Sep) | 6.5ft (2.0m) 13s |
| Best Surf | 2AM (Wed 16th Sep) | 11ft (3.5m) 16s |
| Most Powerful | 5AM (Wed 16th Sep) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright crew, Rusty here checking in on Onrus.
The water is sitting at 57°, which is a couple of degrees cooler than normal for this time of year – so plan for a thicker suit.
Starting off, the first few days are poor. Wednesday is tiny and bumpy with a 3ft WSW swell and a cross-onshore wind. Not much to get excited about.
Thursday the 10th is the first real option. A 7ft SW groundswell with a 15-second period rolls in, giving us moderate wave energy (2061). The wind is a light cross-onshore, so it’s not perfect, but it's rideable for an intermediate. This matches the optimum SW direction, so it has some good shape.
Friday and Saturday are blown out and messy. Strong winds make it lumpy and choppy – a hard pass.
Now, Sunday afternoon the 13th is a standout. The wind goes glassy, and you’ve got a clean 5ft SW swell with a 14-second period. The wave energy is strong (1585). It’s labeled excellent for experienced surfers, and that glassy surface will make for some beautiful, clean waves. The downside is Onrus can be inconsistent, so don’t expect a wave every minute. Crowds are possible.
Monday the 14th has a small 4ft swell with a light offshore wind – clean but weak. Tuesday the 15th pumps offshore but the swell is only 3ft to 5ft with a very long 18 to 20-second period. That long period will produce some nice, shapely waves at this reef, but it’s not big.
Wednesday the 16th brings a massive 12ft SW swell, but it’s forecast to be too big for this break. The combined energy is very strong (5570). With a cross-onshore wind and that size, it’s only for absolute experts. Not recommended for the average surfer.
The second week is quieter. Saturday the 19th is another highlight – 7ft SW swell with a 16-second period and a clean cross-offshore wind. The afternoon session is also clean and glassy with the same size. That’s your best bet for the later part of the forecast.
After that, it fades out. Winds turn onshore and the swell drops, leaving poor conditions through to the end. It’s a familiar pattern for this area – a few good days followed by a lull.
Your two standouts to circle are Sunday the 13th afternoon and Saturday the 19th afternoon. Make the most of them.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Wed morning, min 14°C on Thu night). Winds increasing (light winds from the SSE on Wed morning, fresh winds from the ESE by Fri morning). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 22°C on Sun afternoon, min 14°C on Sat morning). Winds decreasing (fresh winds from the ESE on Sat afternoon, calm by Sun afternoon). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | WSW 13 | WSW 13 | SW 12 | SW 15 | SW 13 | WSW 13 | WSW 12 | SW 12 | WSW 12 | SW 15 | SW 17 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 | SW 20 | SW 18 | WSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 304 | 295 | 667 | 2061 | 1648 | 1100 | 795 | 694 | 330 | 1441 | 3052 | 2010 | 1262 | 947 | 600 | 374 | 268 | 232 | 459 | 1213 | 6308 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | glassy | cross-off | off | cross-off | cross-off | off | off | cross-on |
High Tide | 2:17PM1.61m | 2:35AM1.55m | 2:53PM1.70m | 3:11AM1.59m | 3:27PM1.75m | 3:45AM1.60m | 3:59PM1.73m | 4:17AM1.56m | 4:30PM1.67m | 4:48AM1.49m | 4:59PM1.58m | 5:18AM1.40m | 5:29PM1.45m | ||||||||
Low Tide | 8:07AM0.13m | 8:34PM0.10m | 8:44AM0.06m | 9:11PM0.03m | 9:17AM0.03m | 9:45PM0.00m | 9:49AM0.04m | 10:16PM0.03m | 10:20AM0.09m | 10:46PM0.09m | 10:49AM0.17m | 11:15PM0.19m | 11:18AM0.28m | 11:43PM0.30m | |||||||
 | |  |  | |  | | | | |  |  |  | | | |  | | | |  | |
 | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — |
 | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:32 | — | — | 6:34 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | 2 | 1 | — | — | — | 23 |
Temp °C | 20 | 19 | 15 | 17 | 17 | 15 | 14 | 15 | 15 | 17 | 16 | 17 | 21 | 22 | 20 | 17 | 17 | 17 | 17 | 18 | 15 |
Feels °C | 20 | 18 | 14 | 17 | 16 | 15 | 9 | 9 | 10 | 13 | 11 | 13 | 22 | 23 | 21 | 15 | 13 | 14 | 11 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | SW 12 | SW 15 | SW 13 | WSW 13 | WSW 12 | SW 12 | WSW 12 | SW 15 | SW 17 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 18 | WSW 16 |
| kJ | 304 | 295 | 667 | 2061 | 1648 | 1100 | 795 | 694 | 330 | 1441 | 3052 | 2010 | 1262 | 947 | 600 | 374 | 268 | 232 | 213 | 1213 | 6308 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 8 | SW 17 | — | — | SSW 7 | — | — | SSW 10 | SSW 8 | — | — | SSE 8 | SSE 7 | SSE 8 | SSE 8 | SE 7 | WNW 7 | SW 20 | SW 12 | ESE 11 |
| kJ | 26 | 14 | 280 | — | — | 149 | — | — | 88 | 92 | — | — | 142 | 125 | 113 | 55 | 23 | 35 | 459 | 190 | 41 |
Swell 3 Height (m) Direction Period (s) | S 8 | ESE 9 | SSE 9 | — | — | — | — | — | SW 15 | SW 20 | — | — | — | — | SSE 11 | SE 12 | — | SE 12 | ESE 12 | ESE 11 | — |
| kJ | 1 | 15 | 8 | — | — | — | — | — | 171 | 190 | — | — | — | — | 25 | 23 | — | 22 | 14 | 98 | — |
Wind waves Height (m) Direction Period (s) | ESE 9 | S 3 | — | — | — | S 7 | SSE 7 | SSE 7 | SSE 6 | SSE 7 | SSE 8 | SE 8 | SE 8 | SE 9 | — | WNW 4 | WNW 5 | WNW 7 | WNW 6 | WNW 7 | — |
| kJ | 30 | 1 | — | — | — | 320 | 178 | 145 | 109 | 237 | 488 | 253 | 560 | 513 | — | 13 | 29 | 125 | 226 | 603 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 25 | 4 | 83 | 83 | 4 | 91 | 91 | 4 | 91 | 86 | 10 | 4 | 0 | 0 | 0 | 8 | 8 | 103 | 155 | 83 |
Best forecast wave conditions in Overberg | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
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 Onrus 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 Onrus Surf forecast
The above surf forecast table for Onrus provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Onrus can be found by selecting the local surf guide option on the grey menu. Our Onrus 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 (Onrus) 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 Onrus 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.
Onrus is 6 km (4 miles) from Hermanus. If you plan a holiday in Overberg, look for hotels and other accommodation in Hermanus. Hermanus has rooms for a wide range of budgets as well as car hire and transport links.
Nearest