Surf Forecasts:
Onrus surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 2AM (local time) - 5ft (1.6m), 15s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 4 Aug, 11PM (local time) - 8ft (2.5m), 9s period, W swell with 1,225 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 2PM (local time) - 3.5ft (1.1m), 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 Saturday (Aug 01) at 2PM. The primary swell is predicted to be 1.1m and 14s period with a secondary swell of 0.4m 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 2.5m 9s and forecast to arrive on Tuesday (Aug 04) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Wednesday (Jul 29) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 1st Aug) | 3.5ft (1.1m) 14s |
| Best Surf | 2AM (Wed 5th Aug) | 5ft (1.6m) 15s |
| Most Powerful | 11PM (Tue 4th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
G’day, Rusty here.
Right, we’ve got a real mixed bag at Onrus over the next couple of weeks. This is a reef break, exposed to SW swell, and it’s inconsistent – so you can’t always count on it firing. The water temp is about average for this time of year, nothing wild.
The first few days are pretty ordinary. Wednesday 29th July has a 6ft SSW swell, but with a cross-onshore wind it’s choppy and poor – not worth paddling out. Thursday 30th and Friday 31st are similar: small, messy, and low energy (combined energy around 370–680).
Saturday 1st August shows a little promise. The morning is still light cross-shore, but Saturday afternoon turns glassy with a 4ft SW swell. That’s clean, fun-sized, and the energy is moderate (476). Sunday 2nd August morning is also glassy with the same 4ft SW swell – a nice little window for a smooth session.
Then Monday 3rd August morning is the first real standout: glassy calm, 4ft SW swell, 12-second period, and very good conditions. The combined energy is 700 – moderate and punchy. That’s your best bet in the first week. Tuesday 4th August afternoon has clean offshores and 4ft SW swell, also very good.
But then things get heavy. From Wednesday 5th August through to Tuesday 11th August, the swell jumps up to 8ft–13ft, mostly from SW and W, with periods around 13–14 seconds. The combined energy is massive (3000–7000+). The wind is offshore or cross-offshore, and the conditions are clean – but the size is too big for this reef. This is expert-only territory, and even then, it’s pushing the limits. Not a spot for beginners.
That big run eases on Wednesday 12th August morning, with a drop to 4ft SW swell, clean cross-off wind, and moderate energy (569). A good chance to get back in the water.
Thursday 13th August morning sees another big pulse – 10ft SW swell, 13 seconds, offshore wind, clean, but again too big for Onrus.
So, the best on offer is Monday 3rd August morning – glassy, 4ft, clean, and manageable. The second standout is Tuesday 4th August afternoon, also clean and fun. After that, it’s either too big or too small for a while.
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Fri afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the E on Tue night, light winds from the E by Fri afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 14°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 13 | SW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 1502 | 1151 | 1169 | 919 | 669 | 609 | 545 | 373 | 278 | 185 | 514 | 437 | 424 | 418 | 379 | 273 | 428 | 828 | 718 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross | glassy | cross-off | glassy | cross | glassy | glassy | cross-on | cross |
High Tide | 3:07AM1.42m | 3:34PM1.47m | 3:39AM1.46m | 4:04PM1.53m | 4:10AM1.48m | 4:34PM1.57m | 4:41AM1.47m | 5:03PM1.58m | 5:13AM1.44m | 5:34PM1.57m | 5:47AM1.39m | 6:08PM1.53m | |||||||
Low Tide | 9:10PM0.33m | 9:24AM0.19m | 9:42PM0.28m | 9:52AM0.14m | 10:12PM0.24m | 10:20AM0.12m | 10:43PM0.22m | 10:48AM0.13m | 11:14PM0.21m | 11:17AM0.16m | 11:47PM0.23m | 11:49AM0.22m | 00:25AM0.27m | ||||||
 |  | |  |  | | | | | | | | | | | | | | | |
 | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:35 | — | — |
 | 5:59 | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:02 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 18 | 15 | 15 | 18 | 14 | 18 | 22 | 18 | 21 | 24 | 19 | 18 | 20 | 15 | 16 | 17 | 14 |
Feels °C | 6 | 9 | 14 | 12 | 12 | 14 | 10 | 14 | 19 | 15 | 18 | 21 | 18 | 17 | 18 | 14 | 15 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 13 | SW 12 |
| kJ | 1502 | 1151 | 1169 | 919 | 669 | 609 | 545 | 373 | 278 | 185 | 514 | 437 | 424 | 418 | 379 | 273 | 428 | 828 | 718 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 10 | — | SE 7 | — | — | SE 5 | ESE 8 | SE 10 | WSW 16 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 10 | SW 14 | WSW 15 | ESE 11 | ESE 11 |
| kJ | 2 | 2 | — | 25 | — | — | 18 | 44 | 45 | 166 | 37 | 39 | 29 | 18 | 10 | 96 | 272 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 19 | SW 18 | SE 10 | — | — | S 9 | S 9 | S 9 | W 4 | ESE 11 | — | — |
| kJ | — | — | — | — | — | — | — | 14 | 48 | 34 | — | — | 7 | 6 | 6 | 3 | 12 | — | — |
Wind waves Height (m) Direction Period (s) | E 4 | E 7 | ESE 7 | E 3 | ESE 5 | ESE 5 | ENE 3 | ESE 8 | ESE 9 | — | — | — | — | WNW 3 | W 4 | — | WNW 4 | W 4 | W 4 |
| kJ | 35 | 206 | 158 | 5 | 13 | 19 | 3 | 234 | 262 | — | — | — | — | 2 | 12 | — | 11 | 11 | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 38 | 38 | 4 | 10 | 4 | 4 | 10 | 4 | 4 | 4 | 4 | 0 | 0 | 0 | 8 | 0 | 0 | 4 | 4 |
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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