Surf Forecasts:
Onrus surf forecast from 16 Sep 2026:
- Best quality surf: Monday 21 Sep, 5PM (local time) - 4ft (1.2m), 12s period, WSW swell with glassy winds.
- Most powerful swell: Wednesday 23 Sep, 5PM (local time) - 10ft (3.0m), 12s period, SW swell with 2,584 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 5PM (local time) - 4ft (1.2m), 12s 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 (Sep 21) at 5PM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.5m and 5s. Another secondary swell of 0.9m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 3.0m 12s and forecast to arrive on Wednesday (Sep 23) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Tuesday (Sep 22) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 21st Sep) | 4ft (1.2m) 12s |
| Best Surf | 5PM (Mon 21st Sep) | 4ft (1.2m) 12s |
| Most Powerful | 5PM (Wed 23rd Sep) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Onrus over the next 16 days.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 21°C on Sat afternoon, min 12°C on Thu night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Mon night. Warm (max 27°C on Sun afternoon, min 13°C on Sat night). Winds increasing (calm on Mon afternoon, fresh winds from the W by Tue afternoon). | ||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||
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) | SSW 13 | SSW 12 | SW 12 | SSW 12 | SW 11 | SW 13 | SW 12 | SW 12 | SW 14 | SW 14 | SW 13 | WSW 13 | SW 12 | SW 12 | WSW 12 | SW 11 | SW 10 | SW 12 | SW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 2329 | 1624 | 1149 | 1099 | 696 | 940 | 786 | 396 | 404 | 1680 | 1261 | 904 | 657 | 503 | 359 | 308 | 204 | 149 | 148 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | glassy | cross | cross-off | cross-off | cross-off |
High Tide | 6:20AM1.17m | 6:32PM1.17m | 7:03AM1.04m | 7:21PM1.04m | 8:35AM0.94m | 9:27PM0.96m | 11:23AM0.98m | 11:40PM1.02m | 12:29PM1.10m | 00:36AM1.13m | 1:05PM1.24m | 1:13AM1.25m | |||||||
Low Tide | 00:13AM0.43m | 12:16PM0.52m | 00:49AM0.55m | 12:56PM0.65m | 1:53AM0.67m | 2:37PM0.76m | 4:44AM0.69m | 5:48PM0.72m | 6:14AM0.59m | 6:45PM0.59m | 6:54AM0.47m | 7:19PM0.46m | |||||||
 |  | |  | | | | | | | | | | |  | |  | | | |
 | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — |
 | 6:35 | — | 6:35 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:38 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | 2 | — |
Temp °C | 13 | 16 | 16 | 14 | 17 | 18 | 14 | 17 | 21 | 15 | 22 | 27 | 22 | 25 | 26 | 23 | 19 | 16 | 15 |
Feels °C | 8 | 8 | 7 | 8 | 8 | 9 | 8 | 11 | 16 | 11 | 20 | 26 | 21 | 25 | 26 | 23 | 16 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 12 | SW 12 | SSW 12 | SW 11 | SW 13 | SW 12 | SW 12 | SW 12 | SW 14 | SW 13 | WSW 13 | SW 12 | SW 12 | WSW 12 | SW 11 | SW 10 | WSW 10 | SW 7 |
| kJ | 2329 | 1624 | 1149 | 1099 | 696 | 940 | 786 | 396 | 355 | 1680 | 1261 | 904 | 657 | 503 | 359 | 308 | 204 | 118 | 131 |
Swell 2 Height (m) Direction Period (s) | W 13 | E 11 | — | E 11 | SW 14 | — | SW 16 | SW 14 | SW 14 | — | — | — | — | — | SSE 5 | SW 13 | SW 12 | SW 12 | SW 10 |
| kJ | 339 | 9 | — | 2 | 214 | — | 91 | 241 | 404 | — | — | — | — | — | 12 | 46 | 96 | 149 | 148 |
Swell 3 Height (m) Direction Period (s) | S 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | E 8 | — | W 10 |
| kJ | 106 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 46 | 5 | — | 51 |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 5 | SE 6 | ESE 4 | SE 5 | ESE 5 | ESE 5 | SE 5 | SE 5 | SE 5 | SE 5 | E 3 | SE 5 | SE 4 | — | SW 4 | SW 5 | — |
| kJ | 200 | 170 | 58 | 133 | 47 | 110 | 59 | 48 | 60 | 38 | 20 | 43 | 3 | 33 | 32 | — | 9 | 49 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 247 | 247 | 874 | 23 | 86 | 3820 | 45 | 38 | 91 | 23 | 4 | 23 | 4 | 4 | 0 | 8 | 72 | 50 | 0 |
Best forecast wave conditions in Overberg | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Onrus surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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