Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 pm 14 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
13.8° C
1.9° 

Onrus surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Onrus surf forecast from 14 Aug 2026:

  • Best quality surf: Monday 17 Aug, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
  • Most powerful swell: Friday 21 Aug, 11PM (local time) - 10ft (3.0m), 16s period, SW swell with 4,013 kJ wave energy.
  • Next surfable swell (1★+): Friday 14 Aug, 11PM (local time) - 5ft (1.5m), 14s 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 Friday (Aug 14) at 11PM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.7m and 6s. Another secondary swell of 1.0m and 6s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.0m 16s and forecast to arrive on Friday (Aug 21) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Aug 16) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 14th Aug)5ft (1.5m) 14s
Best Surf 2AM (Mon 17th Aug)10ft (3.0m) 14s
Most Powerful11PM (Fri 21st Aug)10ft (3.0m) 16s

Table - best surf conditions forecast for Onrus over the next 16 days.


The Lowdown

Alright, surfers, Rusty here. Let’s talk about the next couple of weeks down at Onrus. It’s a mixed bag, but there are a few windows where this reef could be something special.

We’re starting off with a bit of a lull. The swell is there, but it’s nothing to get too excited about. Friday morning will see some 5ft WSW groundswell, but the cross-off wind will have it looking a little gutless. The water is a bit colder than normal for this time of year at 57°, so you’ll want the hood or a good thick suit for the first session. It’s inconsistent, so you’ll be waiting around for the sets.

Saturday picks up a touch, with 5ft on offer. The morning is cross, but it’s tiny wind, so not a total loss. The afternoon glass-off is the better call, but the long period (13 seconds) at this size might be breaking a little straight on the reef. Sunday is when things start to get interesting. The swell bumps up to 6ft with a 13-second period, and the morning has a clean, cross-off breeze. This is a good call for the experienced crew, with the energy picking up to a moderate 1127.

Monday looks like the first real standout. The swell jumps to 8ft and the morning is glassy as a lake. The energy is up to a solid 1995, and the WSW swell is right in the sweet spot for Onrus. This is the pick of the first week. It’s pushing the limits for beginners, but for anyone with a bit of experience, this will be firing.

After that, we’ll see the swell wobble around the 7ft to 7ft mark for Tuesday, but the winds go onshore and it gets messy. Not ideal. Wednesday brings a drop back to 7-7ft, but the winds turn cross-off again and both the morning and afternoon sessions look clean and strong. Another solid day for the experienced surfer.

Thursday is okay, with 6ft, but you can feel it fading. Friday the 21st sees the swell dip to 4ft in the morning, but the wind is offshore. It’s a small day, but it’s clean. Then, things change in a hurry.

Friday afternoon on the 21st, the period jumps to 16 seconds and the energy is suddenly very strong at 3256. It’s a fresh offshore wind, which will groom it. This is the calm before the storm.

Now, for the big one. Saturday the 22nd and Sunday the 23rd are going to be serious. The swell is forecast to be huge. We’re talking 15ft to 16ft with very strong energy readings of 8992 and 11362. This is way, way too big for Onrus. The wind is also not favorable. This is for experts only, if at all. Honestly, with that much west in the swell and the size, this looks more like a kite-surfing show than a paddle-surfing session. Stay safe and watch from the shore.

The surf stays too big and unruly for a few days after that. Monday the 24th is still 10ft with onshore winds, and it remains poor. By Tuesday the 25th, it drops back to 8ft, but the winds are onshore and it’s still not great.

We get another promising signal on Wednesday the 26th. The swell is still a solid 10ft with a 14-second period, and the afternoon goes glassy. The energy is strong at 3180. But, it’s still predicted to be too big for this break. It’s a shame, as the conditions would be perfect otherwise. After that, the swell slowly backs off for the rest of the week, but onshore winds keep things messy.

So, to sum it up. The standout is Monday morning, the 17th. Get in the water early. The other one to watch is Wednesday the 19th, which will also offer some strong, clean waves. The big swell later in the month is a no-go for surfing here, and the rest of the time is just average.

This is Rusty, signing off. Keep it salty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Sun afternoon, min 12°C on Sat morning). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 19°C on Thu afternoon, min 10°C on Tue night). Wind will be generally light.

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
4
3
3
!
4
4
3
1
0
2
1
1
0
3
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
WSW
14
1.4
WSW
14
1.6
WSW
13
1.8
WSW
13
1.8
WSW
13
1.8
WSW
14
3
WSW
14
2.5
WSW
13
2.3
WSW
13
2.1
WSW
13
2.3
SW
12
2.5
SW
13
2.5
SW
12
2.2
SW
12
2.1
SW
12
1.9
SW
11
2
SW
12
1.9
SW
12
1.7
SW
12
Wave Graph
Metric surfscale
Energy kJ
791
733
812
1127
1144
1319
3018
2149
1848
1575
1598
2179
1897
1358
1234
930
1131
1031
747
Wind (km/h)
10
NNE
5
NE
0
SSW
10
NW
15
WNW
25
W
10
NNW
10
NW
10
WSW
5
SSE
15
E
25
SE
15
E
20
E
20
ESE
15
ENE
5
SSE
10
S
5
E
Wind State
cross-off
glassy
glassy
off
cross-off
cross-off
off
off
cross-off
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
High Tide
4:46AM1.55m
5:06PM1.69m
5:21AM1.47m
5:39PM1.60m
5:55AM1.37m
6:12PM1.47m
6:30AM1.25m
6:46PM1.33m
7:08AM1.13m
7:25PM1.19m
7:59AM1.02m
8:25PM1.07m
Low Tide
10:47PM0.05m
10:52AM0.06m
11:23PM0.12m
11:25AM0.15m
11:57PM0.21m
11:56AM0.26m
00:31AM0.33m
12:28PM0.39m
1:06AM0.45m
1:02PM0.53m
1:50AM0.57m
1:50PM0.65m
3:11AM0.66m
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:22
7:22
7:20
7:20
7:18
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:12
6:13
6:13
6:14
6:15
6:15
 mm
Temp °C
14
15
18
16
17
19
16
16
16
15
14
16
13
14
16
14
17
19
14
Feels °C
11
15
17
16
13
14
12
15
15
14
11
12
10
11
13
11
16
19
14
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Onrus:

join our community of surf reporters

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.

Nearest locationNearest