Surf Forecasts:
Onrus surf forecast from 3 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 8PM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
- Most powerful swell: Monday 10 Aug, 5AM (local time) - 18ft (5.5m), 12s period, S swell with 8,993 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 5PM (local time) - 3.5ft (1.1m), 13s 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 Monday (Aug 03) at 5PM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 1.1m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 5.5m 12s and forecast to arrive on Monday (Aug 10) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Aug 05) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 3rd Aug) | 3.5ft (1.1m) 13s |
| Best Surf | 8PM (Wed 5th Aug) | 10ft (3.0m) 14s |
| Most Powerful | 5AM (Mon 10th Aug) | 18ft (5.5m) 12s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s get into it.
We’re looking at a solid run of swell for Onrus, but it’s a mixed bag of conditions. The water temp is sitting at 60°, which is about average for this time of year, nothing to worry about.
The first window of opportunity opens up on Monday the 3rd. We’ve got a glassy afternoon with a 4ft swell from the WSW, but the real sneaky session is Tuesday morning the 4th. A clean 4ft from the SW with a cross-offshore breeze, making for some fun, clean lines. The energy is moderate (401), so it’s not a full-on paddle fest, but it’s a nice start.
The standout, and I mean the one to circle on the calendar, is Wednesday morning the 5th. We’re talking a solid 7ft SW groundswell with a 16-second period, and a clean offshore wind. The combined energy jumps to 1915, so there’s some serious push. This is for experienced surfers only – it’s a proper reef break so it’ll be handling that long-period energy beautifully. Crowds are possible here, so get in early.
The middle of the month gets a bit wild. From Thursday the 6th through to Sunday the 9th, the swell pumps up to 10ft to 13ft, with onshore winds and a lot of rain. That’s too big and messy for Onrus, so you’re better off sitting that one out.
Then we get back into it. Starting Wednesday the 12th, the ocean turns on again. A 6ft SW swell with a ridiculously long 20-second period, and clean cross-offshore winds. This is proper groundswell, and the energy is massive (3350). The morning of Thursday the 13th is another cracker: 8ft SW with a 17-second period, light offshore wind, and a high score for the conditions. The water will be glassy and the waves will have that perfect, feathery lip.
The 14th through the 16th of August hold a steady run of 6ft to 7ft SW swell, with calm, glassy mornings on the 15th and 16th. The wind is offshore or glassy, so expect clean, rippable faces. Crowds are still a possibility, but the quality will be worth it.
The last few days of the window (17th and 18th) see the swell get big again – 10ft to 13ft – but the wind swings onshore, so it’s a no-go for paddle surfing.
Best bet: Wednesday morning the 5th for the big, clean SW groundswell, and the 12th through 14th for the long-period, clean, quality waves. The 13th is a true standout.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Thu morning. Warm (max 22°C on Mon afternoon, min 12°C on Thu morning). Winds increasing (calm on Tue afternoon, fresh winds from the WNW by Wed afternoon). | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Sun morning. Very mild (max 14°C on Sat afternoon, min 10°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | WSW 13 | SW 12 | SW 11 | SW 11 | SW 15 | SW 16 | SW 15 | WSW 14 | SW 13 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | WSW 12 | SSW 10 | S 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 402 | 568 | 389 | 292 | 255 | 1871 | 1941 | 4018 | 3028 | 2237 | 2862 | 3372 | 3999 | 3074 | 2005 | 1806 | 2843 | 1780 | 3254 | 3321 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | glassy | off | off | off | off | on | on | on | on | cross-on | off | cross-off | cross-off | cross-off | on | on | on |
High Tide | 6:08PM1.53m | 6:26AM1.32m | 6:48PM1.46m | 7:13AM1.23m | 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 | |||||||
Low Tide | 00:25AM0.27m | 12:25PM0.30m | 1:09AM0.33m | 1:10PM0.39m | 2:06AM0.41m | 2:11PM0.50m | 3:28AM0.47m | 3:45PM0.57m | 5:11AM0.46m | 5:37PM0.54m | 6:35AM0.36m | 6:59PM0.41m | ||||||||
 |  | |  | | | |  |  |  |  |  | | | | | |  | |  | |
 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — |
 | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | — | — | — | — | — | — | 4 | 8 | 2 | 4 | — | — | — | — | — | 1 | 15 | 18 | 10 |
Temp °C | 22 | 19 | 18 | 19 | 15 | 18 | 19 | 15 | 12 | 12 | 12 | 11 | 13 | 11 | 12 | 14 | 12 | 11 | 11 | 12 |
Feels °C | 20 | 17 | 17 | 17 | 15 | 14 | 13 | 10 | 10 | 10 | 9 | 7 | 10 | 8 | 9 | 10 | 8 | 7 | 2 | 1 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | SW 12 | SW 11 | SW 11 | SW 10 | SW 16 | SW 15 | WSW 14 | SW 13 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | WSW 12 | — | SW 11 |
| kJ | 402 | 568 | 389 | 292 | 144 | 1871 | 1941 | 4018 | 3028 | 2237 | 2862 | 3372 | 3999 | 3074 | 2005 | 1806 | 2843 | 1780 | — | 1599 |
Swell 2 Height (m) Direction Period (s) | SW 13 | ESE 11 | ESE 11 | SW 16 | SW 15 | W 9 | E 10 | ESE 10 | ESE 10 | SW 18 | WSW 13 | ESE 10 | — | ESE 7 | SE 6 | — | — | — | — | — |
| kJ | 352 | 12 | 12 | 40 | 255 | 44 | 50 | 33 | 19 | 199 | 1094 | 9 | — | 29 | 11 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | ESE 12 | S 14 | SW 18 | WSW 11 | W 10 | — | — | — | — | ESE 10 | ESE 9 | — | — | — | — | — | — | — | — | — |
| kJ | 13 | 4 | 12 | 12 | 74 | — | — | — | — | 18 | 17 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | WNW 4 | W 6 | — | — | — | — | — | — | — | — | — | — | NW 5 | SSW 10 | S 10 |
| kJ | — | — | — | — | — | 8 | 164 | — | — | — | — | — | — | — | — | — | — | 71 | 3254 | 3321 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 10 | 0 | 0 | 0 | 0 | 272 | 103 | 32 | 10 | 10 | 10 | 10 | 10 | 0 | 60 | 10 | 23 | 206 | 335 |
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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