Surf Forecasts:
Onrus surf forecast from 6 Sep 2026:
- Best quality surf: Thursday 10 Sep, 11AM (local time) - 10ft (3.0m), 16s period, SW swell with onshore winds.
- Most powerful swell: Thursday 10 Sep, 2PM (local time) - 10ft (3.0m), 16s period, SW swell with 4,070 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 with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 3.0m 16s and forecast to arrive on Thursday (Sep 10) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Saturday (Sep 12) 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 (Thu 10th Sep) | 10ft (3.0m) 16s |
| Most Powerful | 2PM (Thu 10th Sep) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let’s break it down. The forecast for Onrus has a couple of real gems, but you gotta dodge a lot of junk to get to them.
Water temp is 58°F, which is a bit colder than normal – you’ll want a thick wetsuit.
Sunday the 6th is a total loss. Strong cross-onshore wind, lumpy and messy. Stay on the beach.
Monday the 7th morning is the first stand out. We’ve got 6ft of SW swell at 14 seconds, with glassy wind. Clean, powerful waves. The combined swell energy is strong (1356). This is for experienced surfers only. The afternoon stays glassy with the same 6ft swell.
Tuesday the 8th morning drops to 3ft from the WSW, 12 seconds. Glassy but weak energy (481). Might be fun for a log. Afternoon gets a light cross-onshore breeze.
Wednesday the 9th is light cross-onshore, 3ft swell, weak energy – not much.
Thursday the 10th morning brings a big 10ft SW swell with 16 second period, but onshore wind and the model says it’s too big for this spot. Expert only, and ugly. Afternoon stays rough.
Friday the 11th to Saturday the 12th – fresh cross-onshore winds, lumpy, 6ft to 8ft swell. Poor.
Sunday the 13th morning cleans up with a 6ft SW swell and cross-offshore wind. Clean but marginal.
Tuesday the 15th morning is the next true highlight. Solid 8ft WSW swell at 13 seconds, with gentle offshore wind from the NW. Strong energy (1876) and excellent conditions for experienced surfers. This is going to be a proper session.
After that, it’s mostly onshore wind, rain, and messy surf. The 19th shows a brief clean window on Saturday afternoon with 4ft swell, but energy is weak.
Second week looks quiet – not much to get excited about.
If you want the best, hit Monday the 7th and Tuesday the 15th mornings. Glassy, clean, solid groundswell.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 13°C on Sun morning). Winds decreasing (strong winds from the E on Sun morning, calm by Tue morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Fri night. Very mild (max 18°C on Wed morning, min 12°C on Fri morning). Winds increasing (light winds from the S on Wed morning, strong winds from the E by Fri night). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | WSW 12 | WSW 11 | SW 11 | WSW 13 | WSW 13 | SW 12 | SW 16 | SW 15 | WSW 14 | SW 13 | SW 12 | SW 12 | SSW 17 | SSW 15 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4525 | 2113 | 1576 | 1288 | 1083 | 355 | 251 | 166 | 169 | 304 | 299 | 1112 | 3905 | 3004 | 2151 | 1607 | 1043 | 736 | 2849 | 3089 | 1641 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | glassy | glassy | cross | glassy | cross-on | glassy | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 3:59PM1.73m | 4:17AM1.56m | |||||||
Low Tide | 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 | 9:49AM0.04m | 10:16PM0.03m | ||||||||
 | |  | | | | | | | | |  |  | |  |  | | | | | | |
 | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — |
 | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | 5 | 2 | 1 | 1 |
Temp °C | 17 | 21 | 17 | 23 | 25 | 22 | 23 | 24 | 19 | 18 | 17 | 15 | 16 | 17 | 15 | 13 | 13 | 14 | 15 | 16 | 16 |
Feels °C | 10 | 15 | 15 | 23 | 24 | 21 | 24 | 24 | 18 | 18 | 16 | 14 | 13 | 13 | 11 | 7 | 7 | 7 | 9 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | WSW 12 | WSW 11 | SW 11 | WSW 13 | WSW 13 | SW 12 | SW 16 | SW 15 | WSW 14 | SW 13 | SW 12 | SW 12 | SSW 17 | SSW 15 | SW 14 |
| kJ | 4525 | 2113 | 1576 | 1288 | 1083 | 355 | 251 | 166 | 142 | 304 | 299 | 1112 | 3905 | 3004 | 2151 | 1607 | 1043 | 736 | 2849 | 3089 | 1641 |
Swell 2 Height (m) Direction Period (s) | S 9 | — | — | SE 9 | ESE 9 | WSW 13 | S 11 | S 10 | SW 14 | SSE 9 | SSE 8 | SSE 9 | — | — | — | SSW 11 | SSW 11 | — | — | — | SSE 7 |
| kJ | 14 | — | — | 31 | 8 | 330 | 188 | 94 | 169 | 16 | 14 | 8 | — | — | — | 265 | 251 | — | — | — | 52 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SSE 14 | — | SW 18 | SW 16 | SW 16 | SSE 9 | S 8 | SSE 8 | SSE 9 | — | — | — | — | — | — | — | — | SE 8 |
| kJ | — | — | — | 37 | — | 13 | 42 | 62 | 27 | 5 | 14 | 8 | — | — | — | — | — | — | — | — | 33 |
Wind waves Height (m) Direction Period (s) | ESE 6 | ESE 6 | ENE 3 | — | — | — | — | — | — | — | SW 3 | — | — | SSE 6 | SSE 6 | ESE 4 | SE 5 | ESE 5 | E 4 | ESE 9 | — |
| kJ | 352 | 145 | 5 | — | — | — | — | — | — | — | 3 | — | — | 110 | 161 | 26 | 80 | 116 | 28 | 803 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 38 | 10 | 0 | 0 | 4 | 0 | 4 | 0 | 32 | 83 | 4 | 38 | 335 | 314 | 91 | 95 | 86 | 40 | 10 | 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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