
Surf Forecasts:
Onrus surf forecast from 3 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) - 8ft (2.5m), 18s period, SSW swell with 4,181 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 14s. 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 2.5m 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) | 8ft (2.5m) 18s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about Onrus over the next couple of weeks. It's a bit of a rollercoaster, with plenty of wind to fight through, but there are a couple of windows that will make it all worth it.
We've got some serious energy coming in, but the wind is going to ruin a bunch of it early on. The best chance for clean, fun waves is at the start of the second week.
The First Week – A Wind Fight
We kick off with some sizeable but messy groundswell. Thursday the 3rd has a 5ft swell from the WSW with a solid 13-second period, packing 1291 units of energy. But the onshore wind from the SE at 9 mph is going to chop it up. By the afternoon, the wind jumps to 25 mph and the swell goes to 8ft, which is a total washout. For experts only, and even then, it's ugly.
Friday and Saturday the 4th and 5th are a complete loss. Strong cross-onshore winds from the ESE and E at 25-28 mph are going to ruin whatever 3ft to 7ft swell is out there. Stay home.
Sunday the 6th sees a massive pulse of energy from the SSW, with the swell hitting 8ft and the period stretching out to a very long 18 seconds. That's 4207 units of energy, a proper groundswell. But again, 19 mph winds from the east will make it a lumpy, cross-onshore mess. With that long period, it’ll be breaking too straight for any real shape on a beach break setup like this.
The Cleanup – Monday and Tuesday the 7th and 8th
Now we're talking. Monday the 7th morning is where it’s at. The wind swings to the west at a light 6 mph, going cross-offshore, which will clean things right up. We’ve got a 6ft swell from the SW with a 14-second period (1246 units of energy). This is excellent surf for experienced surfers – clean, solid, and with proper period behind it. The afternoon holds similar quality with a 6ft swell.
Tuesday the 8th morning keeps that same clean vibe with a light WSW cross-offshore breeze. The swell drops a bit to 4ft, and the period drops to 12 seconds, so still fun, just smaller.
Second Week – Size Returns, But So Does the Wind
After Tuesday, the wind messes things up again until the following Monday. The 14th of September is the next real highlight. The swell builds again to 7ft from the SSW with a 13-second period, bringing 1629 units of energy. But the magic is the wind: it’s forecast to be completely glassy in the afternoon. That is a rare treat. Zero wind, clean 7ft surf. That’s excellent conditions for experienced surfers. Get on it.
Later in the week, we see another pulse of energy. On Wednesday the 16th, there's a 7ft SW swell with a 15-second period (2106 units of energy) and fresh offshore winds from the WNW. That’s about as good as the long-range gets, but it’s a bit of a gamble. The period is so long (15 seconds) that at a spot like this, it might not set up perfectly, but with those offshores, it could be well worth the paddle.
Bottom line: The best windows are Monday the 7th and Monday the 14th. The 14th has glassy conditions and a solid 7ft swell, so if I had to pick one day to circle on the calendar, that would be it. Crowds are sometimes an issue here, so expect some company on those good days.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 19°C on Sat afternoon, min 12°C on Thu morning). Winds increasing (light winds from the NE on Thu morning, strong winds from the E by Sat afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Sun afternoon, min 14°C on Sun morning). Winds decreasing (fresh winds from the E on Sun morning, calm by Mon night). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 | S 9 | SSE 9 | S 9 | SSE 8 | S 8 | SSW 10 | SSW 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 11 | SW 14 | SW 13 | WSW 13 | SW 12 |
Wave Graph | |||||||||||||||||||||
763 | 1099 | 1236 | 575 | 574 | 257 | 201 | 218 | 1455 | 4181 | 1832 | 1237 | 1238 | 984 | 666 | 503 | 188 | 248 | 400 | 341 | 407 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | glassy | cross-off | cross | glassy | cross-on | on | cross-on |
High Tide | 7:09PM1.32m | 7:53AM1.12m | 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 | ||||||||
Low Tide | 12:45PM0.42m | 1:37AM0.44m | 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 | ||||||||
7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | |
— | 6:24 | — | — | 6:25 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | |
mm | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 14 | 15 | 16 | 13 | 16 | 19 | 15 | 18 | 24 | 20 | 23 | 24 | 19 | 19 | 20 | 17 | 17 | 18 | 14 |
Feels °C | 13 | 8 | 6 | 6 | 7 | 4 | 7 | 11 | 8 | 12 | 20 | 19 | 22 | 23 | 20 | 19 | 20 | 16 | 17 | 16 | 11 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 12 | WSW 12 | S 9 | WSW 11 | S 8 | SSW 10 | SSW 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 11 | SW 11 | SW 13 | WSW 13 | SW 12 |
763 | 365 | 222 | 575 | 103 | 257 | 201 | 218 | 1455 | 4181 | 1832 | 1237 | 1238 | 984 | 666 | 503 | 167 | 176 | 400 | 341 | 407 | |
Swell 2 Height (m) Direction Period (s) | S 9 | — | — | WSW 11 | SSW 14 | WSW 11 | WSW 10 | WSW 10 | SSW 10 | S 9 | S 9 | SE 9 | SE 6 | ESE 11 | SW 18 | SW 16 | WSW 12 | SW 14 | SSE 9 | S 8 | SW 4 |
177 | — | — | 109 | 19 | 66 | 59 | 38 | 132 | 26 | 6 | 90 | 8 | 11 | 50 | 130 | 107 | 248 | 15 | 12 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 13 | SW 13 | SW 25 | SW 10 | — | S 12 | S 15 | SE 10 | SW 19 | ESE 11 | SE 11 | SW 15 | SSE 9 | SSE 9 | SSE 8 | ESE 10 |
— | — | — | — | — | 56 | 7 | 25 | 24 | — | 11 | 17 | 28 | 14 | 12 | 5 | 188 | 29 | 15 | 13 | 11 | |
Wind waves Height (m) Direction Period (s) | S 8 | S 9 | SSE 9 | SE 5 | SSE 8 | ESE 5 | ESE 5 | ESE 5 | ESE 5 | ESE 7 | ESE 7 | ESE 9 | — | W 4 | — | — | — | — | — | — | — |
351 | 1099 | 1236 | 73 | 574 | 54 | 120 | 138 | 140 | 620 | 120 | 516 | — | 7 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 941 | 994 | 1363 | 3823 | 86 | 86 | 86 | 86 | 34 | 34 | 4 | 0 | 0 | 0 | 0 | 66 | 0 | 32 | 272 | 4 |
Best forecast wave conditions in Overberg | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
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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.










