Surf Forecasts:
Onrus surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 8AM (local time) - 6ft (1.8m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 11AM (local time) - 10ft (3.0m), 18s period, SSW swell with 4,671 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 8AM (local time) - 6ft (1.8m), 14s period with SW 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 Monday (Sep 07) at 8AM. The primary swell is predicted to be 1.8m and 14s period with a secondary swell of 0.6m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 3.0m 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 2.4m 7s period and expected on Sunday (Sep 06) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Mon 7th Sep) | 6ft (1.8m) 14s |
| Best Surf | 8AM (Mon 7th Sep) | 6ft (1.8m) 14s |
| Most Powerful | 11AM (Sun 6th Sep) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let's switch it up to feet and Fahrenheit.
Right on, let’s have a look at what the next couple of weeks are serving up for the Onrus reef. The opening of the window is basically a write-off with strong onshore winds, so we’ve got a gap of a few days with nothing good to recommend. Things finally start to turn early next week.
The standout session of the whole outlook is Monday the 7th in the morning. We’ve got a clean 6ft S/SW groundswell rolling in with a 14-second period – that’s proper energy (1340). That combined with a light offshore W wind at 6 mph means the line-up should be beautifully groomed. This is for experienced surfers, but if you’ve got the skills, get on it.
Tuesday the 8th morning is worth a mention too. The swell drops to 5ft from the SW, but the wind is totally glassy. That’s a rare treat. The energy is moderate (551), but with those conditions, you’ll be sharing some silky, clean walls with maybe a few other locals – it gets crowded there sometimes.
Later on the 16th, the Wednesday afternoon session looks promising again. Another clean, cross-off wind setup with a 5ft SW groundswell at a very long 17-second period. This long-period stuff really works well at a reef setup like Onrus. The combined energy is strong (1849). Solid option for the more experienced crew.
Water temp on the 4th is 59°, which is a touch under one degree cooler than average for this time of year. Nothing crazy, just a standard Autumn wetsuit job.
Rusty
Short Range ForecastMostly dry. Warm (max 23°C on Sun afternoon, min 12°C on Fri night). Winds decreasing (strong winds from the ESE on Fri afternoon, light winds from the ENE by Sun night). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 15°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | S 9 | SSE 8 | SE 7 | S 10 | SSW 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SW 12 | WSW 12 | WSW 14 | SW 13 | WSW 13 | SW 17 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 573 | 623 | 217 | 314 | 218 | 2758 | 4671 | 2113 | 1413 | 1299 | 1069 | 361 | 505 | 106 | 140 | 342 | 286 | 482 | 2423 | 2834 | 2323 |
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 | cross-on | cross-on | cross-on | cross | cross-off | cross-on | cross | glassy | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on |
High Tide | 8:28PM1.19m | 9:44AM1.06m | 10:28PM1.15m | 11:40AM1.14m | 00:06AM1.23m | 12:49PM1.30m | 1:08AM1.36m | 1:37PM1.47m | 1:55AM1.47m | 2:17PM1.61m | 2:35AM1.55m | 2:53PM1.70m | 3:11AM1.59m | ||||||||
Low Tide | 1:53PM0.55m | 3:13AM0.54m | 3:56PM0.62m | 5:16AM0.51m | 5:56PM0.53m | 6:34AM0.38m | 7:05PM0.37m | 7:26AM0.25m | 7:53PM0.22m | 8:07AM0.13m | 8:34PM0.10m | 8:44AM0.06m | 9:11PM0.03m | ||||||||
 | |  | | | | | | | | | | | | | | |  |  |  |  | |
 | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — |
 | — | 6:25 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 16 | 17 | 13 | 16 | 19 | 14 | 18 | 23 | 19 | 24 | 25 | 21 | 21 | 23 | 19 | 20 | 19 | 15 | 17 | 18 | 15 |
Feels °C | 7 | 8 | 4 | 8 | 11 | 7 | 12 | 18 | 17 | 23 | 25 | 20 | 22 | 24 | 19 | 20 | 19 | 16 | 17 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | S 9 | WSW 11 | SSW 9 | S 10 | SSW 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SW 12 | S 10 | SW 11 | SW 13 | WSW 13 | SW 12 | SW 14 | SW 14 | SW 14 |
| kJ | 573 | 105 | 86 | 314 | 218 | 2758 | 4671 | 2113 | 1413 | 1299 | 1069 | 361 | 505 | 94 | 121 | 342 | 286 | 435 | 2423 | 2834 | 2323 |
Swell 2 Height (m) Direction Period (s) | WSW 11 | SSW 14 | WSW 11 | WSW 10 | WSW 10 | SSW 10 | S 9 | — | — | SE 7 | ESE 10 | WSW 13 | SW 16 | WSW 12 | WSW 14 | SSE 9 | SSE 8 | SW 17 | ESE 11 | — | — |
| kJ | 109 | 18 | 66 | 59 | 38 | 192 | 13 | — | — | 23 | 9 | 330 | 42 | 106 | 140 | 26 | 13 | 482 | 23 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 13 | SSW 13 | SW 26 | SW 13 | — | — | — | SSE 14 | SSE 12 | ESE 10 | SE 10 | SW 11 | S 9 | SSE 9 | ESE 9 | SSE 8 | — | — | — |
| kJ | — | — | 55 | 18 | 104 | 41 | — | — | — | 18 | 28 | 10 | 4 | 76 | 41 | 30 | 17 | 7 | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 5 | SSE 8 | SE 7 | E 5 | SE 5 | SE 9 | ESE 7 | ESE 7 | ESE 6 | — | — | — | — | — | — | — | SW 3 | — | — | — | — |
| kJ | 74 | 623 | 217 | 61 | 129 | 513 | 527 | 158 | 75 | — | — | — | — | — | — | — | 1 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1525 | 247 | 23 | 86 | 86 | 86 | 38 | 34 | 10 | 0 | 32 | 4 | 0 | 4 | 4 | 4 | 32 | 4 | 32 | 206 | 199 |
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