Surf Forecasts:
Onrus surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 11AM (local time) - 6ft (1.8m), 14s period, SW swell with glassy 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, 11AM (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 11AM. The primary swell is predicted to be 1.8m and 14s period with a secondary swell of 0.5m and 7s. The wind is predicted to be glassy 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 2.2m 7s period and expected on Sunday (Sep 06) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 7th Sep) | 6ft (1.8m) 14s |
| Best Surf | 11AM (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, Rusty here. Let's have a look at what's coming our way.
We're looking at a bit of a slow start, but there's some serious potential on the horizon. The first few days are pretty much a write-off with strong onshore winds and messy conditions, so you can give the board a rest. The real action starts to build from Monday the 7th of September.
The standout of the whole run is going to be Onrus on Monday the 7th of September. We're looking at a solid 6ft SSW groundswell with a period around 14 seconds, and here's the kicker – it's going to be glassy. Absolutely no wind, just clean, lined-up waves. The combined swell energy is strong at 1313, and with the wind swinging light and offshore on the Monday afternoon, the conditions are going to be premium. This is for the experienced crew though; that size and period will have some push to it, so leave the foamies at home. Water temp is sitting at 59°, which is about average for the time of year.
After that, things get a bit messy again with onshores and lumpy surf through the middle of the week. Tuesday the 8th still has some glassy morning waves but they're smaller, around 3ft. Not bad for a longboard or a funboard, but not the standout.
We get another shot of quality on Sunday the 13th of September. Onrus is looking clean again with a 6ft SW groundswell and light offshore winds in the morning. The combined energy is solid at 1604, and the conditions should be clean. It won't be as perfect as the previous Monday, but it's definitely a window to keep an eye on.
The last real highlight comes on Tuesday the 15th of September. Another 8ft groundswell, this time from the WSW, and we've got a light cross-offshore wind in the morning turning into a fresh offshore in the afternoon. The combined energy is pushing into the 2000s, so there's plenty of power. This is for the experienced crew again; that's a decent-sized swell.
There's a lot of poor surf and onshore wind in between these windows, but don't let that get you down. When it comes good, it comes good.
Stay frothing.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 14°C on Sat night). Winds decreasing (strong winds from the ESE on Sat afternoon, calm by Tue morning). | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Fri morning. Warm (max 24°C on Tue afternoon, min 14°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the SE by Fri morning). | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | WSW 12 | WSW 11 | SW 11 | SW 13 | WSW 13 | SW 12 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 218 | 2758 | 4671 | 2113 | 1672 | 1288 | 1083 | 418 | 251 | 163 | 169 | 342 | 295 | 730 | 3130 | 2708 | 1762 | 1028 | 718 | 533 |
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 | glassy | glassy | cross | glassy | cross-on | cross-on | cross-on | on | cross-on | on | on | on | on | on | cross-on |
High Tide | 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 | 3:27PM1.75m | 3:45AM1.60m | |||||||
Low Tide | 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 | 9:17AM0.03m | 9:45PM0.00m | |||||||
 |  | | | | | | | | | | | |  |  | |  |  | | | |
 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — |
 | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 3 | 4 | 4 |
Temp °C | 18 | 14 | 18 | 21 | 17 | 24 | 25 | 22 | 24 | 24 | 19 | 19 | 19 | 15 | 18 | 18 | 15 | 14 | 13 | 12 |
Feels °C | 11 | 7 | 11 | 15 | 15 | 23 | 23 | 20 | 24 | 25 | 20 | 18 | 16 | 12 | 16 | 14 | 12 | 10 | 8 | 6 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | WSW 12 | WSW 11 | SW 11 | SW 13 | WSW 13 | SW 12 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
| kJ | 218 | 2758 | 4671 | 2113 | 1672 | 1288 | 1083 | 418 | 251 | 163 | 142 | 342 | 295 | 730 | 3130 | 2708 | 1762 | 1028 | 718 | 533 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | SSW 10 | S 9 | — | — | SE 7 | ESE 9 | WSW 13 | S 11 | S 10 | SW 14 | SSE 8 | SSE 8 | SW 17 | — | — | — | — | — | SW 15 |
| kJ | 38 | 157 | 24 | — | — | 25 | 8 | 330 | 188 | 94 | 169 | 14 | 13 | 177 | — | — | — | — | — | 472 |
Swell 3 Height (m) Direction Period (s) | SW 26 | SW 13 | — | — | — | — | — | SW 18 | SW 16 | SW 16 | SSE 9 | ESE 9 | SE 10 | SSE 8 | — | — | — | — | — | — |
| kJ | 104 | 40 | — | — | — | — | — | 13 | 42 | 62 | 26 | 26 | 4 | 7 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 5 | SSE 10 | ESE 7 | ESE 7 | ENE 4 | — | — | — | — | — | — | S 3 | S 4 | SSE 4 | — | — | SSE 5 | SSE 7 | SSE 7 | SE 7 |
| kJ | 102 | 462 | 396 | 144 | 11 | — | — | — | — | — | — | 2 | 6 | 6 | — | — | 64 | 192 | 290 | 263 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 91 | 86 | 38 | 38 | 10 | 0 | 0 | 4 | 0 | 4 | 4 | 23 | 206 | 4 | 10 | 40 | 335 | 335 | 335 | 95 |
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.
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