Surf Forecasts:
Onrus surf forecast from 8 Sep 2026:
- Best quality surf: Sunday 13 Sep, 11PM (local time) - 4.5ft (1.3m), 13s period, SW swell with offshore winds.
- Most powerful swell: Saturday 12 Sep, 5PM (local time) - 7ft (2.2m), 16s period, SW swell with 2,445 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 5PM (local time) - 2.5ft (0.8m), 11s period with WSW 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 Tuesday (Sep 08) at 5PM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.7m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 2.2m 16s and forecast to arrive on Saturday (Sep 12) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Tuesday (Sep 15) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 8th Sep) | 2.5ft (0.8m) 11s |
| Best Surf | 11PM (Sun 13th Sep) | 4.5ft (1.3m) 13s |
| Most Powerful | 5PM (Sat 12th Sep) | 7ft (2.2m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
We’ve got a solid run of surf on the table for Onrus, but it’s a bit of a mixed bag with the wind. The first real standout is the Tuesday afternoon session. The water is running at 56°, which is a full 4° colder than usual for this time of year – a proper reminder that winter’s grip hasn’t fully let go.
That Tuesday afternoon is looking beautiful. Glassy conditions with a light SSE breeze at 3 mph, and a clean 3ft swell from the WSW. The period is a solid 11 seconds, giving the waves some real shape and energy for a reef break like this. The combined energy is moderate (319), so it’s not a beast, but it’s clean, lined up, and perfect for an intermediate to get some proper turns in. Expect good surf conditions, and while crowds are possible, it’s a Tuesday, so you might get a few waves to yourself.
The next real highlight to keep an eye on is the Monday morning session on the 14th. The wind swings back to a glassy W at 3 mph, with a 3ft, 12-second SW groundswell. The energy is moderate (378), and the glassy surface will have the reef looking like a fishbowl. It’s a smaller day, but clean and fun.
If you’ve got the patience, the best bet on offer might be the Saturday morning of the 19th. Dead calm, with a glassy 5ft, 12-second SW swell. The energy is solidly moderate (760), and with no wind, the wave faces will be perfect. This is a true standout for quality, even if it’s not the biggest. It’s a long-range call, so a little less certain, but it’s a damn good prospect.
There’s a gap after the 14th until the 19th, so a few days of marginal or blown-out conditions in between. The Friday the 11th sees a 19 mph onshore wind, which will ruin the session. The entire middle of the forecast is riddled with strong cross-onshore winds until we get to that glassy Saturday.
The 22nd Tuesday morning also looks promising with a clean cross-offshore breeze and a 6ft SW swell, offering excellent conditions for experienced surfers. The combined energy is moderate (1164), and the clean conditions will make it a rewarding paddle.
Remember, this is a reef break, it’s inconsistent, and the late-period swells (like the 22-second period on the 15th) will be very long-waited, but the power will be there for those who check the tide.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Tue afternoon, min 14°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat morning. Warm (max 24°C on Sun afternoon, min 15°C on Fri night). Winds decreasing (fresh winds from the ESE on Sat afternoon, light winds from the NNE by Sun night). | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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) | WSW 11 | SW 11 | WSW 13 | WSW 13 | SW 12 | SW 15 | SW 14 | WSW 13 | SW 12 | WSW 12 | WSW 11 | SW 14 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 163 | 142 | 304 | 295 | 667 | 2061 | 1672 | 1338 | 1209 | 636 | 347 | 1083 | 2445 | 1855 | 1135 | 865 | 537 | 291 | 200 | 193 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-off | glassy | off | cross-off |
High Tide | 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 | 4:59PM1.58m | ||||||||
Low Tide | 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 | 10:49AM0.17m | 11:15PM0.19m | |||||||
 |  | | |  |  | |  | | | |  | | | |  | | | | | |
 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — |
 | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 24 | 22 | 19 | 19 | 15 | 17 | 17 | 15 | 17 | 19 | 15 | 16 | 19 | 17 | 19 | 24 | 21 | 20 | 18 | 16 |
Feels °C | 22 | 21 | 18 | 18 | 15 | 16 | 15 | 14 | 14 | 15 | 11 | 14 | 17 | 14 | 18 | 23 | 21 | 20 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 11 | SW 11 | WSW 13 | WSW 13 | SW 12 | SW 15 | SW 14 | WSW 13 | SW 12 | WSW 12 | S 8 | SW 14 | SW 16 | SW 14 | SW 14 | SSE 10 | SW 13 | SW 12 | SW 12 | SW 12 |
| kJ | 163 | 142 | 304 | 295 | 667 | 2061 | 1672 | 1338 | 1209 | 636 | 186 | 1083 | 2445 | 1855 | 1135 | 528 | 537 | 291 | 200 | 193 |
Swell 2 Height (m) Direction Period (s) | S 10 | WSW 14 | SSE 9 | SSE 8 | SW 17 | — | — | SSE 6 | S 7 | — | WSW 11 | S 8 | S 9 | S 9 | SSE 9 | SW 14 | SSE 9 | SE 9 | SE 11 | SE 12 |
| kJ | 94 | 140 | 26 | 23 | 280 | — | — | 12 | 209 | — | 347 | 381 | 600 | 509 | 422 | 865 | 277 | 64 | 42 | 35 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SSE 9 | S 8 | E 10 | SSE 9 | — | — | — | — | — | SW 15 | SSW 18 | — | — | — | — | — | S 7 | S 7 | — |
| kJ | 62 | 26 | 1 | 2 | 8 | — | — | — | — | — | 136 | 223 | — | — | — | — | — | 23 | 8 | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 9 | SE 10 | — | — | — | — | — | S 7 | S 7 | SSE 7 | SSE 8 | — | — | — | — | WNW 4 | WNW 6 | WNW 7 |
| kJ | — | — | 38 | 33 | — | — | — | — | — | 242 | 269 | 440 | 1072 | — | — | — | — | 5 | 98 | 115 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 4 | 32 | 4 | 4 | 23 | 83 | 10 | 23 | 91 | 4 | 4 | 40 | 10 | 4 | 4 | 0 | 0 | 60 | 10 |
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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