Surf Forecasts:
Onrus surf forecast from 27 Jul 2026:
- Best quality surf: Monday 3 Aug, 8AM (local time) - 7ft (2.2m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 28 Jul, 2AM (local time) - 10ft (3.0m), 15s period, SSW swell with 3,950 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 2AM (local time) - 3ft (0.9m), 11s 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 2AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.6m and 10s. 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 15s and forecast to arrive on Tuesday (Jul 28) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 9s period and expected on Friday (Jul 31) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 1st Aug) | 3ft (0.9m) 11s |
| Best Surf | 8AM (Mon 3rd Aug) | 7ft (2.2m) 14s |
| Most Powerful | 2AM (Tue 28th Jul) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, fellow surfers, Rusty here. Let's have a look at what's on the cards for Onrus.
Right from the start, we've got a bit of a wait. The first few days are a write-off, with a messy, onshore wind messing things up from Tuesday the 28th right through to Friday the 31st. You'll be battling a lumpy, choppy ocean, and frankly, the energy is weak with poor conditions. Best to give it a miss and sharpen your sticks.
Things finally start to look up on Saturday the 1st of August. The morning is looking tidy with a clean cross-offshore wind and a little 4ft SSW swell wrapping in. The real magic, though, is shaping up for the afternoon. The wind goes glassy, it's going to be a beautiful, clean surf session. The swell stays consistent at 4ft from the SW with a long 13-second period – proper lines. The wave energy is moderate (500). This is the one to circle for this weekend; it's a true standout.
Sunday the 2nd will also start off glassy, with a 4ft SSW swell, but the wind shifts in the afternoon, putting a bit of chop on it.
Now, if you're an experienced surfer, get excited for Monday the 3rd of August. The morning is calm and glassy, with a solid 7ft SW groundswell (14-second period) pulsing through. The energy is strong (1977). This is excellent, powerful stuff, but at 7ft, it's for the crew with some experience under their belts. The afternoon stays glassy – a brilliant day.
Tuesday the 4th cleans up into the afternoon, but the swell is all over the place with a short, weak period, so it won't be as good. Then, get this: from Wednesday the 5th all the way through to at least Wednesday the 12th, the swell is going to be pumping, but it's going to be too big for this break. We are talking huge SW swells, 10ft to 12ft, with massive energy readings in the thousands (e.g. 2976, 3699, 5005). This is serious, expert-only surf, if it's even rideable here. The winds are mostly favourable, but the sheer size will make it a washing machine. Keep an eye on it, but don't be a hero.
So, to sum it up: the first five days are a complete loss. Your best bet in the short term is the glassy sessions on Saturday the 1st and Monday the 3rd. After that, it's a long stretch of big, probably unsurfable waves. It's a shame because the swell is there, just too much of a good thing.
Stay safe out there, and keep an eye on the horizon.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Thu afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the E on Tue afternoon, light winds from the E by Wed afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | ||||||||||||||
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 15 | SSW 14 | SW 14 | SW 13 | SSW 13 | SW 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 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 3950 | 3075 | 1891 | 1387 | 1216 | 1127 | 919 | 680 | 600 | 545 | 373 | 278 | 185 | 469 | 444 | 560 | 511 | 479 | 1606 |
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 | cross-on | cross-on | cross | cross-on | cross-on | cross-off | cross-off | glassy | off | glassy | cross-on | cross-on |
High Tide | 2:34AM1.36m | 3:04PM1.39m | 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 | |||||||
Low Tide | 8:37PM0.40m | 8:55AM0.25m | 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 | ||||||
 |  | |  | | | | |  | | | | | | | | | | | |
 | — | 7:39 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — |
 | 5:58 | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 16 | 13 | 14 | 18 | 15 | 15 | 19 | 14 | 16 | 20 | 17 | 21 | 24 | 19 | 16 | 17 | 15 |
Feels °C | 8 | 8 | 8 | 7 | 9 | 14 | 12 | 12 | 16 | 11 | 12 | 16 | 13 | 17 | 21 | 17 | 14 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SW 14 | SW 13 | SSW 13 | SW 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 15 |
| kJ | 3950 | 3075 | 1891 | 1387 | 1216 | 1127 | 919 | 680 | 600 | 545 | 373 | 278 | 185 | 469 | 444 | 560 | 511 | 479 | 1606 |
Swell 2 Height (m) Direction Period (s) | — | — | — | S 11 | S 10 | — | ESE 7 | ESE 8 | — | ESE 8 | ESE 8 | SE 9 | SE 10 | SE 11 | SE 11 | SE 11 | ESE 12 | SW 19 | ESE 10 |
| kJ | — | — | — | 2 | 2 | — | 5 | 39 | — | 41 | 45 | 21 | 76 | 71 | 56 | 30 | 13 | 57 | 102 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 19 | SW 18 | SW 16 | — | — | S 10 | S 12 | ESE 12 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 14 | 49 | 122 | — | — | 8 | 3 | 13 | — |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 6 | SE 7 | E 4 | ESE 7 | ESE 7 | E 5 | — | ESE 4 | ESE 8 | ESE 8 | ESE 5 | — | — | — | — | — | — | — |
| kJ | 407 | 236 | 155 | 27 | 180 | 145 | 12 | — | 13 | 264 | 234 | 14 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 86 | 86 | 86 | 38 | 23 | 4 | 4 | 4 | 4 | 10 | 10 | 4 | 0 | 0 | 0 | 0 | 0 | 17 | 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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