Surf Forecasts:
Onrus surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 2AM (local time) - 10ft (3.0m), 13s period, SW swell with cross-onshore winds.
- Most powerful swell: Thursday 13 Aug, 11AM (local time) - 8ft (2.4m), 18s period, SW swell with 3,483 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 2AM (local time) - 10ft (3.0m), 13s 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 Sunday (Aug 09) at 2AM. The primary swell is predicted to be 3.0m and 13s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 2.4m 18s and forecast to arrive on Thursday (Aug 13) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 7s period and expected on Tuesday (Aug 11) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 9th Aug) | 10ft (3.0m) 13s |
| Best Surf | 2AM (Sun 9th Aug) | 10ft (3.0m) 13s |
| Most Powerful | 11AM (Thu 13th Aug) | 8ft (2.4m) 18s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let's break this down for the next couple of weeks. It's not going to be game on from the jump. We're looking at a lot of days that are too messy to be any fun, with the wind just wrecking a lot of the swell.
The first real chance to get wet will be on Wednesday, August 12th. We'll see the swell drop to about 5ft from the SW, with a long period. It'll be cross-shore and a bit bumpy, so it's a marginal one.
Thursday, August 13th is when things look better. The morning has the swell back up to 8ft from the southwest, and it's clean. The afternoon is where it's at though. The wind goes glass, the swell is a solid 7ft, and it should be firing for the competent surfer. Onrus is a reef, so this long-period swell will wrap in nicely, but this size is starting to get serious.
The weekend of August 15th and 16th sees a lull, with the swell down in the 5ft to 6ft range. The winds are light and the waves will be clean, but they won't have much guts to them.
The big standout in this whole forecast is Monday, August 17th. The call is for 10ft of SW groundswell with a glassy morning. The energy is huge and the potential is massive. The problem is, it might be too much juice for Onrus. This is a serious day for experts only. It's not a session to be messed with.
Once that passes, Tuesday, August 18th looks like an excellent day. The swell settles to a still-chunky 6ft and the wind is forecast to be glassy again. That should be a fantastic session for those who are comfortable.
Looking ahead to Saturday, August 22nd, there's a promising swell with 8ft from the SW, but it's being pushed by a strong offshore wind. The faces will be clean but it will be a paddle battle. It's exciting, but with this much time out, we can't trust the exact details.
All in all, that Monday, August 17th window is the one to circle. The glassy morning will be a serious spectacle, and the Thursday afternoon before is your best bet for a slightly less intense session.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sun morning. Very mild (max 15°C on Tue afternoon, min 10°C on Tue morning). Winds increasing (light winds from the SSW on Sat night, fresh winds from the E by Tue morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the E on Tue night, calm by Thu afternoon). | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 13 | SW 12 | SSW 12 | SW 12 | SSW 11 | S 10 | SSW 13 | SSW 12 | S 12 | SW 22 | SW 19 | SW 18 | SW 16 | SW 18 | SW 17 | SW 16 | WSW 15 | WSW 14 | WSW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 3449 | 3026 | 3301 | 1839 | 1262 | 710 | 2116 | 1016 | 843 | 1314 | 1798 | 1741 | 2027 | 3483 | 2626 | 1412 | 807 | 961 | 929 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | glassy | cross | cross | cross | cross-off |
High Tide | 11:57PM1.28m | 12:51PM1.25m | 1:08AM1.39m | 1:47PM1.41m | 2:02AM1.50m | 2:34PM1.55m | 2:49AM1.57m | 3:16PM1.67m | 3:31AM1.61m | 3:54PM1.73m | 4:09AM1.60m | 4:31PM1.74m | 4:46AM1.55m | ||||||
Low Tide | 6:35AM0.36m | 6:59PM0.41m | 7:35AM0.23m | 7:58PM0.27m | 8:23AM0.12m | 8:47PM0.15m | 9:04AM0.04m | 9:30PM0.07m | 9:42AM-0.00m | 10:10PM0.04m | 10:18AM0.00m | 10:47PM0.05m | |||||||
 |  |  |  |  | |  |  | |  | | | | | | | | | | |
 | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — |
 | 6:07 | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — |
mm | 5 | 5 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 13 | 12 | 13 | 13 | 12 | 13 | 15 | 12 | 19 | 23 | 20 | 23 | 25 | 23 | 24 | 27 | 23 |
Feels °C | 10 | 4 | 5 | 5 | 7 | 6 | 6 | 6 | 8 | 7 | 15 | 21 | 17 | 19 | 22 | 19 | 20 | 25 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SSW 12 | SW 12 | SSW 11 | SW 11 | SSW 13 | SSW 12 | S 12 | SW 22 | SW 19 | SW 18 | SW 16 | SW 18 | SW 17 | SW 16 | WSW 15 | WSW 14 | WSW 14 |
| kJ | 3449 | 3026 | 2679 | 1839 | 1262 | 334 | 2116 | 1016 | 843 | 1314 | 1798 | 1741 | 2027 | 3483 | 2626 | 1412 | 807 | 961 | 929 |
Swell 2 Height (m) Direction Period (s) | — | E 9 | — | — | S 18 | SSW 14 | WSW 11 | SW 26 | SW 24 | SSW 11 | SSW 10 | SSW 10 | SW 22 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
| kJ | — | 6 | — | — | 7 | 529 | 65 | 27 | 285 | 222 | 135 | 69 | 653 | 242 | 232 | 208 | 177 | 116 | 111 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 11 | — | W 16 | S 11 | SE 8 | SE 9 | SE 8 | S 10 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 76 | — | 5 | 37 | 80 | 49 | 35 | 7 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 7 | SSW 12 | — | S 10 | S 10 | E 3 | ESE 4 | NE 4 | E 4 | ENE 4 | ESE 9 | E 9 | NE 4 | — | — | ESE 10 | — | — |
| kJ | — | 420 | 3301 | — | 669 | 710 | 5 | 28 | 3 | 16 | 11 | 336 | 76 | 12 | — | — | 33 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 34 | 272 | 1372 | 95 | 247 | 40 | 23 | 38 | 34 | 10 | 4 | 4 | 10 | 10 | 0 | 10 | 10 | 4 | 0 |
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)
Latest Updates
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