
Surf Forecasts:
Onrus surf forecast from 6 Aug 2026:
- Best quality surf: Thursday 6 Aug, 8AM (local time) - 10ft (3.0m), 13s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 8 Aug, 8PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,292 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 8AM (local time) - 10ft (3.0m), 13s 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 Thursday (Aug 06) at 8AM. The primary swell is predicted to be 3.0m and 13s period. 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 3.5m 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 2.1m 7s period and expected on Tuesday (Aug 11) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 6th Aug) | 10ft (3.0m) 13s |
| Best Surf | 8AM (Thu 6th Aug) | 10ft (3.0m) 13s |
| 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 folks, it's Rusty here. Let's have a look at what's cooking for the next couple of weeks.
The first bit of the forecast is a bit of a wait, with nothing worth paddling out for until Saturday, the 8th of August. The swell is just too big and messy for this spot before then, especially with that 10ft SW pulse hitting a reef break that's inconsistent. It's a real shame, because Thursday morning the 6th is glassy, but the ocean is just too amped up for a safe session.
The standout window is definitely Saturday morning, the 8th of August. Onrus is a reef break that's exposed to the SW, and we've got a solid 8ft SW groundswell. The wind is offshore from the WNW at 12 mph, making for clean, peeling waves. The combined wave energy is pumping hard at 2126 (moderate to strong energy), and with a 13-second period, this is proper groundswell. It's a setup for experienced surfers only, as it's too big for beginners. The water temp is sitting at 60°, which is pretty much normal for this time of year, so no nasty surprises. Expect crowds here sometimes, so get out early for your pick of the sets.
The following Wednesday morning, the 12th of August, is another cracker. We've got a 6ft SW groundswell with a very long 19-second period. That's proper energy rolling in, with a combined energy of 2304 (moderate to strong). The wind is a light cross-offshore from the NNE at 6 mph, keeping the face clean. Again, this is for experienced surfers. That long period will make the waves stand up nicely on the reef, offering some long, drawn-out walls.
A bit later, on Thursday afternoon the 13th of August, we get a glassy session. The swell has dropped to 6ft from the SW, with a 16-second period and a combined energy of 1783 (moderate to strong). The wind is glassy from the SE at 3 mph. With the sun out, it’ll be a beautiful, clean afternoon. The waves will have plenty of push, so it's still a spot for the more experienced crew.
For the second week, things get a bit more up and down, but Saturday morning the 15th of August is looking promising. A 6ft WSW groundswell with a 16-second period and a clean offshore wind from the NW at 6 mph. The energy is still there at 1629 (moderate to strong). It’s a solid, clean option.
We also have a big, clean swell coming in on Monday morning the 17th of August, with a 10ft WSW groundswell. That's a beast, and will be for experts only. The wind is cross-offshore and light, so it'll be clean, but you need to be on your game. The combined energy is a massive 3440 (strong to very strong), so you'll feel the power.
The forecast gets a bit wild towards the end, with a strong offshore wind on Thursday the 20th of August. While the conditions will be clean, the wind is going to be a serious factor, making paddling extremely difficult. It's a session for the die-hards only.
To wrap it up, the best bets are the Saturday morning of the 8th, and the Wednesday morning of the 12th of August. Get after it.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu morning. Very mild (max 17°C on Sat afternoon, min 9°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sun morning. Very mild (max 16°C on Tue afternoon, min 10°C on Mon night). Winds decreasing (fresh winds from the SSE on Sun morning, light winds from the ESE by Sun night). | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 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) | SW 13 | SW 12 | SW 13 | SW 14 | SW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 12 | S 9 | S 10 | SSW 13 | SSW 12 | S 11 | SW 22 | SW 19 | SW 18 | SW 16 |
Wave Graph | |||||||||||||||||||||
3029 | 2943 | 2840 | 3419 | 4046 | 3119 | 2126 | 4247 | 3883 | 3634 | 3233 | 2514 | 904 | 1299 | 2103 | 1054 | 859 | 1656 | 1988 | 1741 | 1651 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | cross | cross-off | cross-off | off | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-on | cross-off |
High Tide | 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 | 3:16PM1.67m | 3:31AM1.61m | |||||||
Low Tide | 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 | 9:04AM0.04m | 9:30PM0.07m | ||||||||
7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | |
— | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | |
mm | 5 | 2 | 1 | — | — | — | — | 1 | 5 | 3 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 12 | 12 | 16 | 12 | 14 | 17 | 13 | 12 | 12 | 12 | 13 | 13 | 12 | 12 | 16 | 12 | 18 | 21 | 19 |
Feels °C | 11 | 9 | 8 | 8 | 16 | 10 | 10 | 13 | 10 | 4 | 4 | 5 | 8 | 6 | 6 | 5 | 11 | 7 | 15 | 19 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 13 | SW 14 | SW 15 | SW 14 | SW 13 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 12 | S 9 | S 10 | SSW 13 | SSW 12 | S 11 | SW 22 | SW 19 | SW 18 | SW 16 |
3029 | 2943 | 2840 | 3419 | 4046 | 3119 | 2126 | 4247 | 3883 | 3090 | 2680 | 1913 | 588 | 938 | 2103 | 1054 | 859 | 1656 | 1988 | 1741 | 1651 | |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 9 | E 10 | — | — | — | — | — | — | — | S 13 | SW 11 | SSW 13 | WSW 11 | WSW 10 | SW 25 | SSW 11 | SW 10 | SW 10 | SW 20 |
19 | 18 | 9 | 7 | — | — | — | — | — | — | — | 14 | 716 | 402 | 101 | 10 | 221 | 200 | 82 | 63 | 1363 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 11 | — | SW 27 | SSE 11 | SE 8 | S 10 | S 10 | ESE 8 |
— | — | — | — | — | — | — | — | — | — | — | — | — | 268 | — | 28 | 40 | 63 | 74 | 31 | 38 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 12 | SW 12 | SSW 12 | S 9 | S 10 | — | E 4 | ESE 7 | ENE 4 | SE 10 | ESE 8 | — |
— | — | — | — | — | — | — | — | — | 3634 | 3233 | 2514 | 904 | 1299 | — | 16 | 482 | 11 | 160 | 51 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 32 | 10 | 10 | 31 | 17 | 0 | 83 | 272 | 532 | 2885 | 38 | 32 | 220 | 23 | 38 | 32 | 10 | 0 | 4 | 0 |
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.











