Surf Forecasts:
Onrus surf forecast from 6 Sep 2026:
- Best quality surf: Monday 7 Sep, 11AM (local time) - 6ft (1.9m), 14s period, SW swell with glassy winds.
- Most powerful swell: Thursday 10 Sep, 11AM (local time) - 8ft (2.5m), 16s period, SW swell with 3,412 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11AM (local time) - 6ft (1.9m), 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 1.9m and 14s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 2.5m 16s and forecast to arrive on Thursday (Sep 10) 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 1.6m 8s period and expected on Monday (Sep 07) at 5AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 7th Sep) | 6ft (1.9m) 14s |
| Best Surf | 11AM (Mon 7th Sep) | 6ft (1.9m) 14s |
| Most Powerful | 11AM (Thu 10th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty, and I’m looking at the next 16 days for Onrus. It’s a reef break that loves a good SW groundswell, and the water temp is about average for this time of year.
We’ve got a bit of a wait for the real good stuff. The start of the week, Monday the 7th, is actually looking pretty solid right off the bat. Monday morning we’ve got a clean 6ft SW swell with a 14-second period, and the wind is glassy. That’s a beautiful combo, and the wave energy is strong, coming in at 1450. This is definitely one for the experienced crew, as that size is pushing it for beginners. The swell direction is right on the money for Onrus. Crowds are possible here, so get in early.
The quality drops off after that. Tuesday the 8th has smaller surf, around 3ft, with glassy conditions, but it’s not a standout. By Wednesday and Thursday, the wind turns onshore and messy, and while Thursday the 10th sees a jump in size to 8ft SW with a very long 16-second period, the onshore wind makes it a rough affair. The energy is very strong (3412), but the surface is choppy.
We get a complete wipeout from Friday the 11th through to Saturday the 12th with strong onshore winds and rain. Not worth paddling out.
Then, Sunday the 13th is your next real window. The morning has a moderate offshore wind from the WNW, cleaning up a 7ft SW swell at 14 seconds. That’s over 5ft, so it’s for the more experienced, but it’s going to be clean and powerful. The energy is strong (1583). Afternoon holds similar quality with a 6ft swell. This is a solid day.
The following week is a mixed bag. Monday the 14th is cleaner but the swell drops. Tuesday the 15th is a massive one. We’re looking at a 15ft WSW swell with a 16-second period and offshore winds. The energy is extreme (14712). This is expert-only territory, and even then, it might be too big for this break. The forecast says it’s too big for Onrus, so keep that in mind. It’s a long-range call, so promising but less certain.
The rest of the run into the third week is mostly blown out or poor. Thursday the 17th through to the end of the period is dominated by onshore and cross-onshore winds, with only a few marginal windows. The surf on Saturday the 20th has a 6ft SW swell with a 14-second period, but the wind is light cross-onshore, so it’s not perfect.
Overall, your best bets are Monday the 7th and Sunday the 13th. Don’t sleep on them.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 13°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Thu night. Warm (max 21°C on Sat afternoon, min 14°C on Wed night). Winds increasing (light winds from the SE on Wed night, fresh winds from the ESE by Fri night). | ||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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) | SW 15 | SW 14 | SW 13 | WSW 13 | WSW 12 | WSW 11 | SW 14 | SW 13 | WSW 13 | SW 12 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 14 | SSW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 1576 | 1383 | 1083 | 389 | 251 | 163 | 169 | 342 | 295 | 798 | 3412 | 2840 | 1672 | 1325 | 925 | 711 | 1135 | 3139 | 2094 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross | cross | glassy | glassy | cross-on | cross-on | cross-on | on | cross-on | on | on | on | on | cross-on | cross-on | on | cross-on |
High Tide | 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 | 3:59PM1.73m | 4:17AM1.56m | ||||||
Low Tide | 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 | 9:49AM0.04m | 10:16PM0.03m | |||||||
 |  | | | | | | | |  |  | |  |  | | |  | | | |
 | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — |
 | 6:28 | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 3 | — | — | 1 |
Temp °C | 17 | 23 | 25 | 21 | 22 | 24 | 19 | 18 | 18 | 15 | 17 | 19 | 16 | 14 | 14 | 16 | 18 | 21 | 19 |
Feels °C | 15 | 22 | 24 | 19 | 22 | 24 | 19 | 17 | 17 | 14 | 15 | 16 | 13 | 9 | 9 | 12 | 15 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | 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 | SW 14 | SSW 16 | SW 15 |
| kJ | 1576 | 1383 | 1083 | 355 | 251 | 163 | 121 | 342 | 295 | 798 | 3412 | 2840 | 1672 | 1325 | 925 | 711 | 1135 | 3139 | 2094 |
Swell 2 Height (m) Direction Period (s) | — | SE 9 | ESE 9 | WSW 13 | S 11 | S 10 | SW 14 | SSE 9 | SSE 9 | SW 19 | — | — | SSW 16 | SSW 13 | SSW 11 | — | — | — | SE 7 |
| kJ | — | 30 | 8 | 389 | 188 | 94 | 169 | 16 | 15 | 234 | — | — | 47 | 64 | 239 | — | — | — | 104 |
Swell 3 Height (m) Direction Period (s) | — | SSE 14 | — | SW 18 | SW 16 | SW 16 | SSW 8 | SSE 9 | E 10 | SW 16 | — | — | — | — | SW 16 | — | — | — | S 7 |
| kJ | — | 37 | — | 13 | 42 | 62 | 24 | 30 | 8 | 40 | — | — | — | — | 86 | — | — | — | 54 |
Wind waves Height (m) Direction Period (s) | ENE 4 | — | — | — | — | — | — | — | — | — | — | SSE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SE 9 | SE 8 | — |
| kJ | 5 | — | — | — | — | — | — | — | — | — | — | 90 | 137 | 105 | 120 | 82 | 281 | 58 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 0 | 4 | 4 | 0 | 0 | 4 | 4 | 23 | 4 | 10 | 314 | 250 | 40 | 335 | 91 | 34 | 35 | 32 |
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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