
Surf Forecasts:
Onrus surf forecast from 10 Aug 2026:
- Best quality surf: Thursday 13 Aug, 2PM (local time) - 7ft (2.1m), 17s period, SW swell with glassy winds.
- Most powerful swell: Monday 17 Aug, 8AM (local time) - 8ft (2.5m), 16s period, WSW swell with 3,693 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 2PM (local time) - 7ft (2.1m), 17s 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 13) at 2PM. The primary swell is predicted to be 2.1m and 17s period with a secondary swell of 0.6m and 11s. 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 16s and forecast to arrive on Monday (Aug 17) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Tuesday (Aug 11) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Thu 13th Aug) | 7ft (2.1m) 17s |
| Best Surf | 2PM (Thu 13th Aug) | 7ft (2.1m) 17s |
| Most Powerful | 8AM (Mon 17th Aug) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Hey folks, Rusty here. Let’s get into it.
The next 16 days are a real mixed bag for Onrus. We’ve got a solid run of decent swell, but the wind is going to be a constant battle. The first few days are a write-off, so be patient.
Monday 10th and Tuesday 11th are a total loss. The wind is howling onshore, making a mess of the 8ft to 7ft SSW swell. The water’s sitting at 59°, which is about average for this time of year. Don’t even bother.
Wednesday 12th is still marginal. The swell drops to 6ft from the SW, but the wind is cross-shore and choppy. Not worth the paddle.
Thursday 13th is where things start to get interesting. The swell is solid 7ft from the SW, period stretching to 18 seconds – that’s proper groundswell energy. The morning sees a light NNE cross-offshore wind, making it clean. The combined energy is pumping at 2912 (moderate-strong), but 7ft is getting big for beginners. This is for the experienced crew. Onrus is a reef break, and that long period will wrap in nicely, but it can make for some straight sections at the beach. It’s the standout of the first week.
Friday 14th morning is another good one: 5ft from the WSW with a light N cross-offshore, clean lines. The swell period is a solid 15 seconds. Good, clean fun.
Saturday 15th is glassy. Both morning and afternoon have 5-5ft of WSW swell with glassy conditions. This is your classic, clean, fun-size surf. Crowds are *sometimes* an issue here, so you might have some company.
Sunday 16th remains clean with a WNW cross-offshore breeze and 5-6ft of WSW swell. Nice.
Monday 17th the wind swings back onshore, spoiling the 8ft swell. Another one to skip.
Tuesday 18th is back to clean with a WNW cross-offshore, but the 7ft swell is a bit messy. Still, it’s clean, so it’s worth a look.
Wednesday 19th & Thursday 20th – forget it. Strong onshore winds and lumpy, messy waves. The swell is there but it’s a kite surfer’s dream, not a paddle surfer’s.
Friday 21st is a beauty. The wind is offshore from the NW, 16 mph, and the 6ft SW swell is clean. The period is only 12 seconds, but the offshore wind will hold it up. Another standout for the more experienced.
Saturday 22nd morning is glassy again with a 7ft SW swell, period 17 seconds (very long period). This is a big, clean groundswell. The combined energy is 2515 (strong). This is expert territory at 7ft, and that long period will make it a bit walled at the beach, but the reef will handle it. The best day of the whole forecast.
Sunday 23rd morning is also glassy with 7ft of WSW swell, 15 second period. Another excellent, clean, powerful day for the experienced surfer.
Monday 24th is clean in the morning with a light W cross-offshore and a 6ft SSW swell. Good, solid conditions.
Tuesday 25th has a strong NW offshore wind, but the swell is only 5ft. It’s clean, but a bit small.
So, to wrap it up: the absolute best windows are Thursday 13th morning, Saturday 22nd morning, and Sunday 23rd morning. Get on it if you’ve got the skills. The rest of the time, keep an eye on the wind – it’s the boss here.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Thu morning, min 10°C on Tue night). Winds decreasing (strong winds from the E on Tue afternoon, light winds from the NE by Thu morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Thu afternoon, min 15°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | S 10 | SSW 13 | SSW 12 | SSW 12 | SW 22 | SW 19 | SW 18 | SW 16 | SW 18 | SW 16 | SW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 |
Wave Graph | ||||||||||||||||||||
1401 | 2220 | 1180 | 705 | 1641 | 1798 | 1741 | 2027 | 2912 | 2084 | 1672 | 1102 | 1087 | 1033 | 850 | 812 | 733 | 777 | 702 | 1465 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross-off | glassy | glassy | cross-off | cross | cross-on | cross-off | cross-off | cross-off | cross |
High Tide | 2:02AM1.50m | 2:34PM1.55m | 2:49AM1.57m | 3:16PM1.67m | 3:31AM1.61m | 3:54PM1.73m | 4:09AM1.60m | 4:31PM1.74m | 4:46AM1.55m | 5:06PM1.69m | 5:21AM1.47m | 5:39PM1.60m | ||||||||
Low Tide | 7:58PM0.27m | 8:23AM0.12m | 8:47PM0.15m | 9:04AM0.04m | 9:30PM0.07m | 9:42AM-0.00m | 10:10PM0.04m | 10:18AM0.00m | 10:47PM0.05m | 10:52AM0.06m | 11:23PM0.12m | 11:25AM0.15m | 11:57PM0.21m | |||||||
— | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | |
6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 14 | 17 | 13 | 14 | 20 | 16 | 22 | 24 | 22 | 22 | 20 | 19 | 19 | 20 | 17 | 18 | 20 | 16 |
Feels °C | 6 | 6 | 7 | 9 | 5 | 9 | 16 | 11 | 19 | 23 | 21 | 21 | 17 | 17 | 18 | 18 | 16 | 15 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | S 10 | SSW 13 | SSW 12 | SSW 12 | SW 22 | SW 19 | SW 18 | SW 16 | SW 18 | SW 16 | SW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 |
913 | 2220 | 1180 | 705 | 1641 | 1798 | 1741 | 2027 | 2912 | 2084 | 1672 | 1102 | 1087 | 1033 | 850 | 812 | 733 | 777 | 702 | 1465 | |
Swell 2 Height (m) Direction Period (s) | SW 11 | WSW 11 | SW 26 | SW 24 | SSW 11 | SW 10 | SW 10 | SW 22 | ESE 12 | SE 11 | ESE 10 | SE 11 | SE 11 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 12 | SW 18 |
347 | 103 | 27 | 287 | 247 | 108 | 65 | 653 | 119 | 80 | 221 | 30 | 19 | 65 | 45 | 45 | 26 | 31 | 46 | 607 | |
Swell 3 Height (m) Direction Period (s) | SSW 14 | — | W 16 | SW 10 | — | SE 9 | SE 9 | SE 10 | — | — | — | — | — | WSW 18 | ESE 10 | — | — | — | — | ESE 11 |
529 | — | 5 | 4 | — | 49 | 28 | 108 | — | — | — | — | — | 106 | 20 | — | — | — | — | 25 | |
Wind waves Height (m) Direction Period (s) | S 10 | ENE 3 | E 4 | ESE 5 | ESE 8 | ENE 4 | ESE 6 | E 4 | — | — | — | — | — | W 4 | — | — | — | WNW 3 | W 4 | — |
1401 | 2 | 27 | 59 | 261 | 11 | 52 | 12 | — | — | — | — | — | 6 | — | — | — | 3 | 17 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 220 | 23 | 45 | 45 | 38 | 10 | 10 | 10 | 10 | 4 | 0 | 0 | 0 | 0 | 4 | 4 | 0 | 0 | 0 | 4 |
Best forecast wave conditions in Overberg | ||||||||||||||||||||
Best forecast wave conditions in South Africa | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











