Surf Forecasts:
Onrus surf forecast from 23 Jul 2026:
- Best quality surf: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with cross-onshore winds.
- Most powerful swell: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with 8,364 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 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 (Jul 23) at 11PM. The primary swell is predicted to be 4.0m and 17s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 4.0m 17s and forecast to arrive on Thursday (Jul 23) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Thursday (Jul 23) at 11AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 23rd Jul) | 13ft (4.0m) 17s |
| Best Surf | 11PM (Thu 23rd Jul) | 13ft (4.0m) 17s |
| Most Powerful | 11PM (Thu 23rd Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Hey, it’s Rusty. Let’s break down the next couple weeks at Onrus.
First up, there’s a little bit of surf right away, but the real fun starts Friday, July 24th. We’ve got a solid 10-foot SW swell rolling in with a long 15-second period, pumping out some serious energy. Friday morning has a light cross breeze, but Friday afternoon goes dead glassy. That afternoon session is the pick of the first week – clean, powerful lines on the reef, with the swell direction locked in from the SW. It’s a bit much for the groms at that size, but for the experienced guys, it’ll be game on. Water temp is about 60°, which is normal for this time of year.
Conditions turn pretty ordinary from Saturday the 25th through Wednesday the 30th, mostly onshore and choppy. Then we hit a flat spell with tiny, weak swell under 3 feet heading into the start of August.
The big return comes on Monday, August 5th, and Tuesday, August 6th. Strong offshore NW winds and another huge, long-period SW groundswell. Tuesday morning the 6th shows an 11- to 12-foot swell with a 16-second period and massive energy. That’s big, clean, and raw – strictly for the experts. Tuesday afternoon actually drops a little in height but the period stretches to 17 seconds, making for some incredibly powerful, lined-up waves on the reef. Again, the winds are clean offshore. Water temp stays average.
The two sessions to circle on the calendar: Friday, July 24th afternoon, and Tuesday, August 6th. Both are big, clean, and world-class for those who can handle it.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 19°C on Sat afternoon, min 10°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu morning, calm by Fri afternoon). | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Tue afternoon. Warm (max 20°C on Sun afternoon, min 14°C on Sun night). Winds increasing (light winds from the ESE on Sun morning, strong winds from the ESE by Tue morning). | ||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||
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 11 | SW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 16 | SSW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1234 | 1539 | 7862 | 4251 | 3261 | 1919 | 1922 | 1721 | 1358 | 882 | 765 | 1191 | 939 | 5031 | 2982 | 3178 | 2383 | 1657 | 1581 | 1255 | 769 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-on | cross | glassy | cross-on | cross-on | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | on |
High Tide | 10:45AM1.00m | 11:04PM1.11m | 12:12PM1.04m | 00:20AM1.14m | 1:12PM1.12m | 1:16AM1.21m | 1:55PM1.21m | 1:58AM1.29m | 2:31PM1.31m | 2:34AM1.36m | 3:04PM1.39m | 3:07AM1.42m | 3:34PM1.47m | 3:39AM1.46m | |||||||
Low Tide | 4:43PM0.67m | 5:58AM0.57m | 6:16PM0.65m | 7:01AM0.50m | 7:17PM0.57m | 7:46AM0.42m | 8:01PM0.49m | 8:23AM0.33m | 8:37PM0.40m | 8:55AM0.25m | 9:10PM0.33m | 9:24AM0.19m | 9:42PM0.28m | ||||||||
 |  |  |  | |  | | | | | |  | | |  | |  |  |  | | | |
 | 7:43 | — | — | 7:43 | — | — | 7:41 | — | — | 7:41 | — | — | 7:41 | — | — | 7:39 | — | — | 7:39 | — | — |
 | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — |
mm | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | 7 | 7 | — | — | — |
Temp °C | 15 | 13 | 13 | 12 | 14 | 12 | 14 | 19 | 16 | 19 | 20 | 15 | 15 | 17 | 16 | 14 | 14 | 15 | 16 | 18 | 17 |
Feels °C | 10 | 11 | 10 | 10 | 13 | 11 | 11 | 17 | 13 | 17 | 17 | 14 | 10 | 11 | 10 | 7 | 7 | 12 | 15 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 12 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 12 | SSW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 |
| kJ | 1234 | 1539 | 7862 | 4251 | 3261 | 1919 | 1922 | 1721 | 1358 | 882 | 765 | 1191 | 939 | 5031 | 2982 | 3178 | 2383 | 1657 | 1581 | 1255 | 769 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SW 20 | SE 12 | SE 12 | SE 12 | SE 11 | SSW 13 | — | ESE 10 | SW 15 | SW 15 | SW 17 | SW 16 | — | — | — | — | SSW 17 | SW 13 | — | — |
| kJ | 7 | 634 | 37 | 35 | 34 | 19 | 569 | — | 10 | 223 | 217 | 101 | 894 | — | — | — | — | 258 | 767 | — | — |
Swell 3 Height (m) Direction Period (s) | SW 23 | SE 12 | — | — | — | — | — | — | — | ESE 10 | ESE 10 | SW 12 | — | — | — | — | — | — | — | — | — |
| kJ | 21 | 38 | — | — | — | — | — | — | — | 19 | 9 | 37 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 6 | — | — | — | — | — | ESE 11 | ESE 4 | ESE 4 | — | — | S 5 | — | SE 7 | SSE 9 | SSE 9 | SSE 8 | SE 8 | ESE 5 | ESE 5 | E 4 |
| kJ | 108 | — | — | — | — | — | 68 | 17 | 12 | — | — | 53 | — | 696 | 885 | 525 | 423 | 245 | 84 | 70 | 50 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 60 | 32 | 30 | 10 | 10 | 10 | 10 | 10 | 10 | 4 | 4 | 4 | 95 | 95 | 89 | 220 | 221 | 38 | 4 | 4 | 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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