Surf Forecasts:
Onrus surf forecast from 24 Aug 2026:
- Best quality surf: Sunday 30 Aug, 11AM (local time) - 10ft (3.0m), 11s period, WSW swell with onshore winds.
- Most powerful swell: Sunday 30 Aug, 5PM (local time) - 10ft (3.0m), 12s period, WSW swell with 2,689 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 8AM (local time) - 4.5ft (1.4m), 12s period with SSW 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 (Aug 27) at 8AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.8m and 12s. 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 12s and forecast to arrive on Sunday (Aug 30) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Saturday (Aug 29) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 27th Aug) | 4.5ft (1.4m) 12s |
| Best Surf | 11AM (Sun 30th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 5PM (Sun 30th Aug) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
G'day, Rusty here. Let's have a look at what Onrus has got lined up for us over the next couple of weeks. Right now, the water’s sitting at about 59°, which is pretty close to average for this time of year – nothing unusual there.
The first decent window isn't until Thursday, 27th August. There's some wait though – the first few days are pretty average. Monday and Tuesday are a write-off with messy, cross-onshore winds, small lumpy swell and poor conditions. Not worth paddling out. Wednesday, 26th August does not improve – strong cross-onshore breeze and lumpy surf.
Thursday morning, 27th August is where things start to look up. We've got clean conditions with light cross-offshore breezes and a 5ft swell coming from the S, with a period of 12 seconds. The wave energy is moderate (685), and the forecast says expect very good surf conditions. This carries through to the afternoon, too. Onrus is a reef break and can be inconsistent, so keep that in mind, but with clean lines and that SSW optimum direction, it’s a solid option.
Friday, 28th August turns poor again – light cross-onshore winds and smaller swell.
Saturday, 29th August returns to clean conditions. Saturday morning with a light cross-offshore breeze and 3ft swell from the WSW, 13-second period, and clean conditions. Saturday afternoon bumps up to 6ft from the W with a moderate cross-offshore breeze – still clean and looking good.
Sunday, 30th August sees a big jump in size, but the morning swell hits 10ft from the WSW, and while the wind and tide are favorable, that is too big for this break, especially for intermediates. Experts might look at it, but it’s marginal.
Now, here's the standout. Monday, 31st August – glassy conditions, no wind, with a 8ft WSW swell and a 12-second period. That’s excellent surf for experienced surfers. The wave energy is strong (1597). The optimum direction matches up nicely, and with glass, it’s going to be clean as a whistle. This is the pick of the period.
Tuesday, 1st September continues the quality. Glassy again in the morning with a 7ft SW swell, 11-second period. Then the afternoon turns on with clean, cross-offshore breeze and a 7ft SW swell, 14-second period. Excellent conditions for experienced surfers again.
Then we hit a massive pulse. Wednesday, 2nd September sees huge 18ft to 20ft swell from the WSW, but it's accompanied by near gale-force winds – poor conditions for paddling. Thursday, 3rd September is even bigger, with 20ft SW swell and a 17-second period, but again, the swell is too big for this break even with clean winds. Friday, 4th September has cleaner offshore winds and 13ft to 12ft SSW swell, but again, too big for anything but the absolute experts.
From Saturday, 5th September onwards, it drops back down, but the winds turn onshore and choppy again, with poor conditions through to Tuesday, 8th September.
So, to sum it up: the best on offer is Monday, 31st August with glassy, 8ft WSW swell, and Tuesday, 1st September morning with glassy 7ft SW swell. After that, it’s all too big or blown out.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Tue afternoon, min 10°C on Mon night). Winds increasing (light winds from the E on Mon morning, fresh winds from the E by Wed morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Fri afternoon, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 11 | SSW 11 | SW 14 | SW 14 | SW 14 | SW 13 | WSW 13 | SSW 16 | S 11 | S 12 | S 11 | S 11 | S 11 | WSW 14 | WSW 13 | WSW 13 | W 12 | WSW 13 | WSW 11 | WSW 12 | WSW 12 |
Wave Graph | |||||||||||||||||||||
706 | 425 | 2216 | 2358 | 1977 | 1326 | 512 | 392 | 556 | 519 | 492 | 410 | 279 | 243 | 209 | 312 | 800 | 2345 | 1782 | 2689 | 2440 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | glassy | cross-on | cross-on | off | cross-off | cross-off | cross-on | on | cross-on | cross-on |
High Tide | 1:39PM1.22m | 1:42AM1.27m | 2:10PM1.34m | 2:15AM1.37m | 2:38PM1.46m | 2:45AM1.46m | 3:06PM1.56m | 3:15AM1.52m | 3:34PM1.64m | 3:45AM1.55m | 4:02PM1.68m | 4:16AM1.55m | 4:32PM1.68m | 4:48AM1.52m | |||||||
Low Tide | 7:48PM0.48m | 8:02AM0.33m | 8:19PM0.37m | 8:29AM0.23m | 8:48PM0.27m | 8:56AM0.15m | 9:17PM0.18m | 9:23AM0.10m | 9:46PM0.12m | 9:50AM0.07m | 10:15PM0.09m | 10:19AM0.07m | 10:46PM0.09m | ||||||||
7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | |
— | 6:17 | — | — | 6:19 | — | — | 6:20 | — | — | 6:21 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — |
Temp °C | 14 | 16 | 12 | 14 | 19 | 14 | 16 | 19 | 16 | 21 | 23 | 18 | 24 | 30 | 26 | 18 | 18 | 15 | 14 | 15 | 14 |
Feels °C | 12 | 13 | 10 | 11 | 14 | 10 | 9 | 13 | 14 | 19 | 20 | 17 | 20 | 27 | 22 | 16 | 15 | 13 | 12 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 11 | SSW 11 | SW 14 | SW 14 | SW 14 | SW 13 | WSW 13 | WSW 12 | S 11 | S 12 | S 11 | S 11 | S 11 | S 10 | WSW 13 | WSW 13 | WSW 15 | WSW 13 | SSE 11 | WSW 12 | WSW 12 |
706 | 425 | 2216 | 2358 | 1977 | 1326 | 512 | 390 | 556 | 519 | 492 | 410 | 279 | 175 | 209 | 312 | 302 | 1693 | 11 | 2689 | 2440 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | WSW 11 | W 11 | SW 16 | SSW 15 | SW 16 | SSW 11 | SSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 11 | WSW 14 | S 10 | S 11 | S 11 | SSE 10 | SSE 11 | SSE 10 | ESE 13 |
76 | 387 | 63 | 251 | 144 | 65 | 200 | 237 | 167 | 153 | 145 | 95 | 91 | 243 | 127 | 119 | 85 | 35 | 22 | 10 | 16 | |
Swell 3 Height (m) Direction Period (s) | — | SW 15 | — | — | — | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 18 | WSW 16 | WSW 15 | SW 14 | WSW 11 | S 13 | WSW 17 | E 9 | — | — | SSE 10 | SE 10 |
— | 309 | — | — | — | 51 | 223 | 392 | 169 | 13 | 26 | 87 | 91 | 65 | 87 | 108 | 2 | — | — | 10 | 4 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 4 | SE 7 | SE 7 | ENE 4 | — | W 4 | — | ESE 9 | SE 4 | WNW 4 | WNW 5 | W 12 | WSW 13 | WSW 11 | — | — |
— | — | — | — | — | 12 | 212 | 242 | 5 | — | 3 | — | 124 | 10 | 5 | 84 | 800 | 2345 | 1782 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 23 | 10 | 10 | 335 | 23 | 45 | 38 | 10 | 0 | 0 | 0 | 4 | 4 | 0 | 0 | 65 | 38 | 38 | 352 | 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)
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.











