
Surf Forecasts:
Onrus surf forecast from 7 Sep 2026:
- Best quality surf: Monday 7 Sep, 11AM (local time) - 6ft (1.8m), 14s period, SW swell with glassy winds.
- Most powerful swell: Thursday 10 Sep, 11AM (local time) - 8ft (2.5m), 16s period, SW swell with 3,059 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. 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 onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Sunday (Sep 13) at 2PM.
| 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 (Thu 10th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what's cooking for Onrus over the next couple of weeks. It's a bit of a mixed bag, but there are a couple of windows where it'll all come together.
Right off the bat, Onrus is a reef break, and right now the water is sitting at 58°, which is a couple degrees colder than normal for this time of year—nothing crazy, but you'll want a good wetsuit. The groundswell is about to fire up, but we've got to get through a few days of iffy conditions first.
The standout session is gonna be Monday morning, September 7th. We've got a clean 6 ft SW swell with a solid 14-second period, and the wind is glassy out of the WNW. The combined swell energy is pumping at 1325 – that's serious, powerful water moving through. The report says it's excellent surf for experienced surfers, and I agree. That's the one to point your board at. The afternoon on Monday is still rideable, but it goes a bit wonky with a cross-shore wind, so get out early.
Tuesday, September 8th, drops off a bit. You've got smaller 3 ft to 3 ft WSW swell, but the mornings are glassy. It's a good option for a longboard or a funboard if you want to cruise without the crowd, but it's nothing compared to Monday.
Now, don't get too excited for the middle of the week. Wednesday, September 9th, is a write-off with onshore wind and poor surf. Thursday, September 10th, shows a big jump in size—up to 8 ft with a 16-second period—but it's messy with onshore wind and rain showers. The wave energy is massive at 3059, but it's not clean. That's a kite-surfing forecast, not a paddle-surfing one.
Friday and Saturday, September 11th and 12th, are also poor with strong, dirty onshore winds. South-easters will have it choppy and blown out. Don't bother.
The next real window pops up on Sunday, September 13th. The morning is okay with a clean 6 ft SW swell and offshore wind, but the Sunday afternoon is the pick of the second half of the week. The wind goes offshore from the WNW at 16 mph, the swell holds at 6 ft with a 14-second period, and the energy is 1215. The report calls it excellent for experienced surfers, and that's a solid call. That afternoon session will be clean and powerful.
Monday, September 14th, is still fun in the morning with a cleaner 4 ft swell, but the wind picks up hard in the afternoon.
Now, for the big dogs: Tuesday, September 15th. This is a proper swell event. The morning sees a 10 ft W swell with howling 25 mph offshore winds, and the afternoon is even bigger at 15 ft with a 15-second period and 34 mph offshore. The energy is off the charts—7839 in the afternoon. But here's the thing: the report says it's too big for this break. This is reef territory only for absolute experts who know the lineup. For anyone else, it's a spectator sport. The wind will be howling offshore, making it look clean, but paddling out will be a mission and the take-off zone will be critical.
After that, it’s a long, bleak stretch. From Wednesday, September 16th, right through to Monday, September 21st, the wind stays onshore, the rain comes in, and it's mostly poor surf. There's a tiny glimmer of hope on Sunday, September 20th, with a clean 5 ft SW swell and offshore wind, but the energy is moderate and the wind is fresh, so it won't be pristine.
The last day in the window, Tuesday, September 22nd, is poor again with choppy onshore wind.
So, to keep it simple: Monday morning, September 7th is your absolute best bet for clean, powerful waves. Sunday afternoon, September 13th, is your backup plan for the second week. The big stuff on the 15th is for experts only.
Rusty out.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 14°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri afternoon. Very mild (max 19°C on Sat afternoon, min 13°C on Fri afternoon). Winds decreasing (fresh winds from the SE on Fri morning, light winds from the WSW by Sat night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 14 | SW 13 | WSW 13 | WSW 12 | WSW 11 | SW 11 | SW 13 | WSW 13 | SW 12 | SW 16 | SW 14 | WSW 13 | SW 13 | SW 12 | SW 12 | SW 13 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 |
Wave Graph | |||||||||||||||||||||
1288 | 1083 | 389 | 251 | 163 | 169 | 342 | 295 | 667 | 3059 | 2265 | 1422 | 1044 | 850 | 505 | 905 | 2107 | 1907 | 1403 | 1215 | 744 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross | glassy | glassy | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | on | cross-on | cross-off | off | cross-off |
High Tide | 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 | 4:30PM1.67m | 4:48AM1.49m | |||||||
Low Tide | 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 | 10:20AM0.09m | 10:46PM0.09m | ||||||||
6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | |
— | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | 2 | 3 | 1 | — | — | 1 | — | — | — |
Temp °C | 24 | 26 | 21 | 23 | 24 | 19 | 20 | 18 | 15 | 17 | 18 | 15 | 14 | 14 | 16 | 17 | 19 | 17 | 17 | 18 | 17 |
Feels °C | 23 | 25 | 19 | 23 | 24 | 19 | 19 | 17 | 15 | 15 | 15 | 13 | 9 | 9 | 13 | 15 | 17 | 15 | 14 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 13 | SSW 12 | WSW 12 | WSW 11 | SW 11 | SW 13 | WSW 13 | SW 12 | SW 16 | SW 14 | WSW 13 | SW 13 | SW 12 | SW 12 | SW 13 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 |
1288 | 1083 | 355 | 251 | 163 | 142 | 342 | 295 | 667 | 3059 | 2265 | 1422 | 1044 | 850 | 505 | 905 | 2107 | 1907 | 1403 | 1215 | 744 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | ESE 9 | WSW 13 | S 11 | S 10 | SW 14 | SSE 9 | SSE 8 | SW 20 | — | — | — | — | SW 16 | SSW 11 | SSE 6 | SE 8 | SSE 7 | S 8 | SE 11 | S 8 |
19 | 8 | 389 | 188 | 94 | 169 | 16 | 24 | 134 | — | — | — | — | 39 | 68 | 60 | 39 | 89 | 72 | 31 | 317 | |
Swell 3 Height (m) Direction Period (s) | SSE 14 | — | ESE 10 | SW 16 | SW 16 | SSE 9 | ESE 9 | E 10 | SSE 9 | — | — | — | — | — | — | — | SSE 11 | SSE 11 | SE 11 | — | ESE 10 |
37 | — | 10 | 42 | 62 | 26 | 28 | 8 | 8 | — | — | — | — | — | — | — | 12 | 12 | 33 | — | 11 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 3 | — | — | — | — | S 7 | SSE 7 | SSE 7 | SSE 7 | ESE 4 | SE 8 | — | WNW 5 | WNW 5 | S 8 |
— | — | — | — | — | — | 2 | — | — | — | — | 230 | 175 | 229 | 145 | 10 | 482 | — | 32 | 53 | 443 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 32 | 4 | 0 | 0 | 4 | 32 | 25 | 4 | 10 | 10 | 4 | 95 | 335 | 4 | 4 | 38 | 10 | 206 | 0 | 31 |
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.










