Surf Forecasts:
Onrus surf forecast from 2 Sep 2026:
- Best quality surf: Sunday 6 Sep, 11PM (local time) - 5ft (1.6m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 11AM (local time) - 7ft (2.1m), 18s period, SW swell with 2,557 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 11PM (local time) - 5ft (1.6m), 15s 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 (Sep 06) at 11PM. The primary swell is predicted to be 1.6m and 15s period with a secondary swell of 0.6m and 5s. Another secondary swell of 0.4m and 3s is also forecast. 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 2.1m 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 1.5m 8s period and expected on Saturday (Sep 05) at 8AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 6th Sep) | 5ft (1.6m) 15s |
| Best Surf | 11PM (Sun 6th Sep) | 5ft (1.6m) 15s |
| Most Powerful | 11AM (Sun 6th Sep) | 7ft (2.1m) 18s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, grab your wettie, let’s talk about the next couple of weeks at Onrus. We’ve got a wild ride ahead, but it’s not all smooth sailing.
Right off the bat, Wednesday morning at Onrus is looking massive but clean. Swell is pumping at a solid 9.8ft from the southwest, with a long 13-second period, and it’s glassy—barely a breath of wind. The water’s sitting at 59°, which is just about average for this time of year. But here’s the thing: this is a reef break, inconsistent at the best of times, and 9.8ft is a lot of ocean. This is strictly for experienced surfers only. The energy is off the charts at 2802, so expect serious power. It’s a standout if you’ve got the chops and you’re willing to sit out the crowds that are sometimes around.
Wednesday afternoon the wind swings and the quality drops fast—cross-onshore and messy. Don’t bother. The rest of the week is a write-off. Thursday and Friday have onshore gales and poor conditions, with swell bouncing around but nothing worth paddling out for. The weekend is just as grim, with strong cross-offshore winds and choppy, blown-out surf. The first week is basically a bust after that one glassy window.
Now, look ahead to Monday, the 7th of September. That’s your next real chance. Monday morning brings clean, cross-offshore winds from the WNW, with a 5.2ft SW swell at 14 seconds. The energy is a healthy 1049, and conditions are described as excellent for experienced surfers. It’s not the biggest, but it’s rideable and clean—sometimes that’s all you need. Still, remember this spot is inconsistent, so don’t bank on perfect sets rolling through.
The middle of the second week is quiet, with small, clean waves on the 8th and 9th, but they’re tiny—2.3ft to 3.0ft. Fun for a longboard if you’re desperate, but nothing to write home about. The standout in the second week is Thursday the 10th of September. Morning glass again, 5.6ft from the WSW at 11 seconds, very clean conditions, and a good energy reading of 627. That’s a lovely window for a solid session on a reef that can handle a bit of size.
But hold on—the real monster shows up on the 16th of September. Wednesday morning has a 7.9ft SW swell, 10-second period, cross-offshore wind, and the energy has jumped to 2954. That’s expert territory again. By the afternoon, it’s even bigger: 13.1ft from the SW with a very long 16-second period, and the combined energy is a staggering 9294. That’s massive, deep-water energy. However, it’s predicted to be too big for this break, and with an onshore wind by then, it’ll be a washing machine. Only the bravest (and biggest) chargers should even think about it.
The best on offer: Wednesday morning (2nd of September) for the brave, glassy 9.8ft peak, and Thursday morning (10th of September) for a cleaner, more manageable 5.6ft session. The 16th of September is a wildcard—huge, but likely unruly.
Stay safe out there.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 17°C on Fri afternoon, min 11°C on Wed night). Winds increasing (light winds from the SE on Wed morning, strong winds from the ESE by Fri afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun afternoon, min 13°C on Sat morning). Winds decreasing (strong winds from the E on Sat night, calm by Sun night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SW 13 | SW 13 | WSW 13 | WSW 13 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SE 8 | SSW 10 | SSW 10 | SW 21 | SW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SW 12 | SW 11 | SW 11 |
Wave Graph | |||||||||||||||||||||
2802 | 2241 | 1338 | 763 | 880 | 1151 | 828 | 574 | 408 | 205 | 169 | 1414 | 2557 | 1571 | 1025 | 990 | 905 | 353 | 389 | 119 | 119 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:18PM1.46m | 6:47AM1.24m | 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 | ||||||||
Low Tide | 11:59AM0.29m | 00:39AM0.31m | 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 | ||||||||
7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | |
— | 6:24 | — | — | 6:24 | — | — | 6:25 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | |
mm | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 14 | 15 | 15 | 14 | 16 | 17 | 14 | 16 | 18 | 16 | 18 | 25 | 20 | 20 | 22 | 16 | 17 | 18 | 14 |
Feels °C | 14 | 14 | 12 | 13 | 8 | 7 | 7 | 7 | 5 | 7 | 9 | 9 | 13 | 23 | 19 | 18 | 19 | 13 | 15 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 11 | SSW 10 | SSW 10 | SW 21 | SW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SW 12 | SW 11 | SW 11 |
2802 | 2241 | 1338 | 763 | 359 | 222 | 109 | 66 | 65 | 205 | 169 | 1414 | 2557 | 1571 | 1025 | 990 | 905 | 353 | 389 | 119 | 119 | |
Swell 2 Height (m) Direction Period (s) | — | — | S 9 | — | — | — | S 15 | SSW 14 | SSW 13 | WSW 10 | WSW 10 | SSW 10 | S 9 | SE 9 | SE 10 | SE 11 | ESE 10 | WSW 12 | SW 16 | WSW 11 | SW 14 |
— | — | 139 | — | — | — | 4 | 19 | 66 | 41 | 38 | 105 | 15 | 41 | 85 | 42 | 210 | 220 | 67 | 102 | 102 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | S 11 | — | SW 26 | WSW 10 | — | S 9 | — | SSE 13 | SSE 13 | WSW 18 | WSW 4 | S 10 | SSE 9 |
— | — | — | — | — | — | — | — | 9 | — | 25 | 18 | — | 6 | — | 17 | 32 | 31 | 3 | 52 | 28 | |
Wind waves Height (m) Direction Period (s) | — | — | E 3 | SSE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SE 8 | ESE 5 | ESE 5 | ESE 5 | ESE 7 | SE 6 | — | WNW 4 | W 6 | W 4 | — | — | — |
— | — | 8 | 470 | 880 | 1151 | 828 | 574 | 408 | 114 | 133 | 140 | 158 | 62 | — | 13 | 101 | 8 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 23 | 10 | 4 | 847 | 247 | 1525 | 3820 | 86 | 86 | 86 | 45 | 34 | 4 | 0 | 0 | 72 | 0 | 0 | 0 | 0 |
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.











