
Surf Forecasts:
Onrus surf forecast from 5 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) - 10ft (3.0m), 18s period, SSW swell with 4,671 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 0.5m and 8s. 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 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 3.0m 9s period and expected on Saturday (Sep 12) at 8AM.
| 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) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s coming our way at Onrus.
First thing you need to know: the water is sitting at 59°, which is about 2° cooler than normal for this time of year. Nothing too wild, just a bit of a nip in the air.
We’ve got a rough start, I’m not gonna lie. Saturday the 5th and Sunday the 6th are a write-off. Strong cross-onshore winds up to 25 mph are just trashing everything. The swell is there, but it's messy and lumpy. For the first couple of days, don’t even bother.
Monday the 7th is where it starts to turn. The morning sees a light cross-offshore breeze from the west at just 3 mph, and the swell is a solid 6 ft from the southwest with a nice long period of 14 seconds. The wave energy is strong (1378). Conditions clean up and it’s looking excellent for experienced surfers. Then the afternoon goes glassy, 6 ft from the southwest, period of 13 seconds. That’s a real treat. The combined energy of all swells is still sitting at 1006. This is the standout of the first week. Clean, glassy, and plenty of power.
Tuesday the 8th is a smaller day, with 3 ft to 3 ft swell from the west-southwest. It’s glassy, but the energy drops to moderate (481). Still a fun option for a longboard or a groveler, but nothing to get too excited about.
Wednesday the 9th and Thursday the 10th see the wind swing back onshore or cross-onshore, and it gets messy again. Not worth the paddle.
Friday the 11th and Saturday the 12th are a write-off too. Strong winds and lumpy conditions. The swell is there, but it’s just not surfable.
Sunday the 13th is a bit of a mixed bag. The morning has a clean cross-offshore wind, but the swell is big at 8 ft from the southwest. That’s expert territory, and the energy is strong (2243). The afternoon has rain showers, but the wind is still cross-offshore and the swell drops to 5 ft, making it a bit more manageable. A marginal call, but worth a look if you’re keen.
Now, Monday the 14th. This is the big one. The morning is glassy, dead calm, with a 6 ft swell from the southwest, period of 13 seconds. The energy is strong (1130). The forecast says it’s excellent for experienced surfers, and that’s a fair call. The afternoon, however, the swell jumps to 10 ft from the southwest. The wind is light cross-offshore, but that’s too big for this break. Only for the very brave.
Tuesday the 15th through Saturday the 19th is a run of 10 ft+ swell from the southwest and west. The wind is often cross-offshore or light, so the waves will be clean, but they are simply too big for Onrus. The combined energy is through the roof, hitting 6359 on Thursday the 17th. This is kite-surfing territory, not paddle surfing. The end of the forecast, Sunday the 20th, sees the swell drop back to 3 ft from the southwest with a long period of 15 seconds, but the wind is onshore, so it’s a bit of a letdown.
So, to sum it up: The best bet by a long shot is Monday the 7th. Get in the water for that morning session, or the glassy afternoon. It’s clean, it’s powerful, and it’s the sweet spot. The second week is a tale of too much swell and onshore winds, so don’t get your hopes up for that.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 12°C on Sat morning). Winds decreasing (strong winds from the ESE on Sat afternoon, calm by Mon afternoon). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Thu night. Warm (max 25°C on Tue morning, min 14°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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) | S 10 | SSW 10 | SW 21 | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | WSW 13 | WSW 12 | WSW 11 | SW 11 | SW 13 | WSW 13 | SW 12 | SW 14 | SW 14 | SW 14 | WSW 13 | SSE 8 | SE 8 |
Wave Graph | |||||||||||||||||||||
314 | 218 | 2758 | 4671 | 2113 | 1413 | 1299 | 991 | 389 | 251 | 163 | 169 | 342 | 295 | 785 | 2643 | 2439 | 1864 | 835 | 671 | 398 | |
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 | cross-on | cross-off | glassy | cross | glassy | glassy | on | cross-on | on | cross-on | on | on | on | on | cross-on | cross-on |
High Tide | 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 | 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 | — | — | 6:56 | — | — | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 2 | 1 | — |
Temp °C | 16 | 18 | 15 | 17 | 21 | 17 | 24 | 25 | 23 | 25 | 23 | 20 | 18 | 18 | 15 | 18 | 20 | 16 | 15 | 13 | 14 |
Feels °C | 8 | 10 | 8 | 10 | 15 | 15 | 23 | 23 | 21 | 26 | 22 | 20 | 18 | 17 | 13 | 16 | 17 | 14 | 12 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | S 10 | 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 14 | SW 14 | SW 14 | WSW 13 | WSW 12 | WSW 12 |
314 | 218 | 2758 | 4671 | 2113 | 1413 | 1299 | 991 | 355 | 251 | 163 | 142 | 342 | 295 | 785 | 2643 | 2439 | 1864 | 835 | 443 | 285 | |
Swell 2 Height (m) Direction Period (s) | WSW 10 | WSW 10 | SSW 10 | S 9 | — | — | SE 9 | SE 10 | WSW 13 | S 11 | S 10 | SW 14 | SSE 9 | SSE 8 | SSW 4 | — | — | — | SSW 11 | — | SW 15 |
59 | 38 | 188 | 13 | — | — | 42 | 15 | 389 | 188 | 94 | 169 | 25 | 13 | 6 | — | — | — | 48 | — | 134 | |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SW 26 | SW 13 | — | — | — | SSE 14 | — | ESE 10 | SW 16 | SW 16 | SSE 9 | ESE 9 | SSE 10 | SSE 9 | — | — | — | — | — | SSW 10 |
18 | 104 | 40 | — | — | — | 37 | — | 10 | 42 | 62 | 16 | 27 | 10 | 8 | — | — | — | — | — | 55 | |
Wind waves Height (m) Direction Period (s) | ESE 5 | SE 5 | SSE 10 | ESE 7 | ESE 6 | ESE 6 | — | — | — | — | — | — | S 3 | S 3 | ESE 3 | SE 5 | SE 5 | SSE 6 | S 8 | SSE 8 | SE 8 |
54 | 115 | 460 | 459 | 140 | 66 | — | — | — | — | — | — | 3 | 6 | 1 | 43 | 87 | 105 | 419 | 671 | 398 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 91 | 91 | 86 | 38 | 38 | 10 | 0 | 0 | 4 | 0 | 0 | 4 | 4 | 23 | 4 | 10 | 83 | 23 | 250 | 23 | 86 |
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.










