Surf Forecasts:
Onrus surf forecast from 5 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 11PM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
- Most powerful swell: Saturday 8 Aug, 8PM (local time) - 11ft (3.5m), 14s period, SW swell with 5,000 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 11PM (local time) - 10ft (3.0m), 14s 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 Wednesday (Aug 05) at 11PM. The primary swell is predicted to be 3.0m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 3.5m 14s and forecast to arrive on Saturday (Aug 08) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Wednesday (Aug 12) at 2PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 5th Aug) | 10ft (3.0m) 14s |
| Best Surf | 11PM (Wed 5th Aug) | 10ft (3.0m) 14s |
| Most Powerful | 8PM (Sat 8th Aug) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's coming down the line for Onrus. This reef setup is exposed to the SW swell, and it's an inconsistent spot, so it doesn't fire all the time, but when it does, it's a treat.
We’ve got a big gap of nothing worth paddling out for right now. The first real surf on offer doesn't show up until Saturday the 8th of August. Up until then, there's a lot of swell, but it's just too big for this break, or the wind is howling. We're talking about a solid week of waiting.
The standout session is going to be Saturday morning, the 8th of August. The swell is a solid 8ft from the SW, with a period of 13 seconds, creating a heap of energy (2126). That's a bit of a beast, so this is for experienced surfers only. The wind is a light 15 mph WNW breeze, blowing cross-offshore, which will keep the faces clean. It's a bit of a mission to get out there, but the reward will be proper, powerful waves. Expect crowds here, as it's a spot that draws a crew when it's on.
The water temperature is sitting at 60°, which is pretty much bang on average for this time of year, so no surprises there.
After that, the surf drops off again. The next time it looks interesting is Monday the 17th of August. The afternoon session on the 17th shows a 6ft WSW swell, 13-second period, with a light 15 mph W cross-offshore breeze. The energy is moderate (1458), and it's another excellent one for the experienced crew. It won't be as big as the 8th, but the quality will be there.
Then into the following week, we get a few smaller, cleaner days. Wednesday the 19th of August morning is looking glassy with a 5ft WSW swell and a 5 mph offshore breeze. That's a proper fun-sized wave for intermediate surfers, clean as a whistle. Expect a few people out, but it shouldn't be a circus.
So, to wrap it up: the big one is Saturday the 8th of August for the experts. After that, keep an eye on Monday the 17th for a quality session, and then the 19th for some clean, smaller waves.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Wed night. Very mild (max 18°C on Wed afternoon, min 10°C on Thu night). Winds decreasing (fresh winds from the NW on Wed afternoon, calm by Fri afternoon). | Days 5-7 Weather SummaryHeavy rain (total 34mm), heaviest during Sat night. Very mild (max 16°C on Sat afternoon, min 10°C on Sat night). Mainly strong winds. | |||||||||||||||||||
Wed 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 15 | WSW 13 | SW 13 | SW 12 | SW 13 | SW 14 | SW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | SSW 12 | SSW 11 | S 10 | S 10 | S 13 | S 12 | SSW 11 | SW 21 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1915 | 4186 | 3145 | 2801 | 2840 | 3419 | 4046 | 3119 | 2126 | 4183 | 4103 | 3693 | 3793 | 1997 | 1275 | 1179 | 2537 | 1347 | 495 | 1441 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:37PM1.37m | 8:16AM1.13m | 8:47PM1.27m | 9:48AM1.08m | 10:22PM1.23m | 11:33AM1.12m | 11:57PM1.28m | 12:51PM1.25m | 1:08AM1.39m | 1:47PM1.41m | 2:02AM1.50m | 2:34PM1.55m | 2:49AM1.57m | |||||||
Low Tide | 2:06AM0.41m | 2:11PM0.50m | 3:28AM0.47m | 3:45PM0.57m | 5:11AM0.46m | 5:37PM0.54m | 6:35AM0.36m | 6:59PM0.41m | 7:35AM0.23m | 7:58PM0.27m | 8:23AM0.12m | 8:47PM0.15m | ||||||||
 |  |  | | | | |  | |  |  |  | | |  |  |  | | | | |
 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — |
 | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — |
mm | — | 7 | 4 | 2 | 1 | — | — | — | — | — | 16 | 10 | 2 | 4 | 2 | — | — | — | — | — |
Temp °C | 18 | 15 | 13 | 12 | 11 | 12 | 16 | 13 | 14 | 16 | 13 | 11 | 12 | 11 | 12 | 12 | 12 | 14 | 15 | 12 |
Feels °C | 12 | 9 | 10 | 9 | 7 | 8 | 16 | 12 | 11 | 13 | 10 | 1 | 2 | 3 | 4 | 3 | 4 | 6 | 7 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 15 | WSW 13 | SW 13 | SW 12 | SW 13 | SW 14 | SW 15 | SW 14 | SW 13 | SW 14 | SW 13 | E 8 | — | SSW 11 | SW 11 | SW 11 | S 13 | S 12 | SSW 11 | SW 21 |
| kJ | 1915 | 4186 | 3145 | 2801 | 2840 | 3419 | 4046 | 3119 | 2126 | 4183 | 4103 | 6 | — | 1997 | 579 | 347 | 2537 | 1347 | 495 | 1441 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | — | E 10 | — | — | — | — | ESE 9 | — | — | — | S 18 | SSW 14 | — | WSW 10 | SW 25 | SSW 11 |
| kJ | 33 | 19 | 19 | 18 | — | 7 | — | — | — | — | 8 | — | — | — | 6 | 207 | — | 20 | 161 | 226 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 13 | S 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 31 | 50 |
Wind waves Height (m) Direction Period (s) | WNW 6 | — | — | — | ESE 9 | E 4 | — | — | — | — | — | SW 12 | SSW 12 | SSE 8 | S 10 | S 10 | SE 8 | SE 8 | SE 8 | SSE 11 |
| kJ | 205 | — | — | — | 9 | 9 | — | — | — | — | — | 3693 | 3793 | 1027 | 1275 | 1179 | 701 | 686 | 410 | 674 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 272 | 66 | 32 | 32 | 10 | 10 | 30 | 17 | 0 | 25 | 32 | 274 | 846 | 10 | 1363 | 2906 | 86 | 45 | 45 | 38 |
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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