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Surf Forecasts:
Onrus surfForecast / Overberg / South Africa
16 Day Weather and Surf, issued 1 pm Friday 17 Apr 2026 SASTForecast update in hr min s Forecast update imminent
Onrus surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Onrus sea temperature is
19.2° C
(Which is 1.2°C warmer than normal for this time of year)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 Saturday (Apr 18) at 2AM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 2.5m and 12s. Another secondary swell of 1.1m and 15s is also forecast. 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 5.0m 16s and forecast to arrive on Wednesday (Apr 22) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Thursday (Apr 23) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 18th Apr) | 10ft (3.0m) 12s |
| Best Surf | 2AM (Sat 18th Apr) | 10ft (3.0m) 12s |
| Most Powerful | 11AM (Wed 22nd Apr) | 16ft (5.0m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 32mm), heaviest during Fri afternoon. Very mild (max 18°C on Sat afternoon, min 14°C on Fri afternoon). Winds increasing (moderate winds from the NW on Sat morning, near gales from the W by Sun night). | Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Tue afternoon. Very mild (max 16°C on Mon afternoon, min 12°C on Thu morning). Winds decreasing (fresh winds from the WNW on Mon afternoon, light winds from the S by Wed morning). | ||||||||||||||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 11 | 12 | 11 | 11 | 9 | 10 | 11 | 12 | 14 | 14 | 13 | 13 | 13 | 14 | 16 | 16 | 15 | 14 | 13 | 12 | 12 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 1362 | 2691 | 2492 | 1340 | 747 | 2409 | 4204 | 5290 | 7663 | 5789 | 4233 | 3871 | 6335 | 6622 | 12172 | 10117 | 5371 | 3324 | 1945 | 876 | 488 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | off | off | off | off | cross- off | cross- off | off | off | off | off | cross- off | cross | cross- on | on | cross- on | cross- on | cross- on | cross | cross | ||
High Tide / height (m) | 3:18PM 1.62 | 3:29AM 1.78 | 3:57PM 1.62 | 4:09AM 1.74 | 4:37PM 1.57 | 4:51AM 1.65 | 5:21PM 1.49 | 5:36AM 1.51 | 6:10PM 1.37 | 6:30AM 1.34 | 7:12PM 1.25 | 7:40AM 1.18 | 8:39PM 1.18 | 9:21AM 1.09 | |||||||||
Low Tide / height (m) | 9:19PM 0.05 | 9:49AM -0.07 | 9:58PM 0.06 | 10:28AM -0.02 | 10:40PM 0.12 | 11:10AM 0.08 | 11:25PM 0.23 | 11:56AM 0.21 | 12:18AM 0.36 | 12:52PM 0.36 | 1:27AM 0.49 | 2:06PM 0.48 | 3:11AM 0.57 | ||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||
| Sunrise | - | - | 7:07 | - | - | 7:09 | - | - | 7:09 | - | - | 7:09 | - | - | 7:11 | - | - | 7:11 | - | - | 7:11 | ||
| Sunset | 6:17 | - | - | 6:15 | - | - | 6:15 | - | - | 6:14 | - | - | 6:13 | - | - | 6:12 | - | - | 6:09 | - | - | ||
 |  |  |  | | |  | | | |  |  | |  | |  |  | | | | | |||
Rain (mm) | 9 | 5 | 1 | - | 1 | 2 | 6 | 6 | 2 | - | - | 2 | 6 | 2 | - | - | - | - | - | - | - | ||
| Temp. °C | 14 | 15 | 16 | 18 | 15 | 16 | 16 | 14 | 16 | 16 | 15 | 15 | 16 | 15 | 15 | 16 | 15 | 16 | 22 | 17 | 23 | ||
| Feels °C (?) | 9 | 10 | 11 | 11 | 9 | 7 | 7 | 3 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 10 | 10 | 17 | 12 | 20 | ||
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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