Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.6° C
1.1° 

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


Onrus surf forecast from 19 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 5AM (local time) - 10ft (3.0m), 13s period, SW swell with glassy winds.
  • Most powerful swell: Thursday 20 Aug, 8AM (local time) - 11ft (3.5m), 13s period, SW swell with 3,697 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 8PM (local time) - 7.5ft (2.3m), 12s 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 Wednesday (Aug 19) at 8PM. The primary swell is predicted to be 2.3m and 12s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.5m 13s and forecast to arrive on Thursday (Aug 20) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Aug 22) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Wed 19th Aug)7.5ft (2.3m) 12s
Best Surf 5AM (Thu 20th Aug)10ft (3.0m) 13s
Most Powerful 8AM (Thu 20th Aug)11ft (3.5m) 13s

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


The Lowdown

G'day, Rusty here, and I've been staring at the charts for Onrus and there's a bit of a story to tell. We've got a solid run of swell coming, but it's not all clean sailing, especially for the first few days.

Right now, the water is sitting at 58°, which is a touch colder than normal for this time of year. The first surf we can really get into is on Wednesday the 19th, but it's just a tease. You've got a 8ft SW swell with a 12-second period, but the wind is rubbish – a cross-on S breeze making things messy. The wave energy is strong (1665), but the conditions are marginal. It's a bit of a "look but don't touch" day.

Thursday the 20th is where it gets interesting, but it's for the experienced crew only. The morning is glassy with a 10ft SW swell and a long 13-second period – that's a massive amount of energy (3475). The wind is light and offshore from the east, so it will be clean, but that size is only for the brave. The tide and wind are favorable, but the swell is too big for most. The afternoon looks similar, but with a cross-shore wind.

Friday the 21st is a write-off. The swell drops a bit, but the wind turns onshore and it's choppy and messy. Best to stay at home.

Saturday the 22nd is a real turnaround. The morning brings a clean 4ft SSW swell with a 12-second period, and the wind is offshore from the WNW. That's a clean, glassy wave, and the energy is moderate (639). It's a nice, manageable size. The afternoon is a bit smaller with a cross-off wind, still clean.

Sunday the 23rd sees the swell picking up again, with a 7ft SW swell, but the wind is onshore, so it's a bit of a messy one. The wave energy is strong (1551), but the conditions are marginal.

The rest of the week is a mixed bag. Monday the 24th has small, cleanish waves, and Tuesday the 25th is blown out again.

Now, the real standout comes at the end of the week. Wednesday the 26th is the pick of the bunch. The morning is a gem: glassy, with a 5ft SSW swell and a 13-second period, and the wind is light from the WNW. The energy is solid (1196), and the conditions are excellent for experienced surfers. The afternoon is also clean with a 6ft SW swell and a cross-off wind. This is your best bet for a quality session.

Thursday the 27th is another good one, with glassy conditions and a 4ft to 4ft WSW swell. The wind is light, and the wave energy is moderate (647-720). It's a classic, clean, fun-sized day.

After that, we've got a few more days of decent but not perfect surf. Friday the 28th gets a bit windy, and Saturday the 29th is a big, messy storm with a 12ft SSW swell and howling onshore winds – that's a kite-surfing day, not a paddle-surfing one.

The following week starts to look promising again. Sunday the 30th has a clean 8ft S swell, and Monday the 31st has a solid 7ft SW swell with offshore winds – that's excellent for the experienced. The following Tuesday and Wednesday are smaller but still have some energy.

Overall, the best session is Wednesday the 26th with that glassy, clean 5ft swell. The energy is high, the wind is perfect, and it's a true standout. The other good days are Saturday the 22nd and Thursday the 27th for a more relaxed, clean surf. Keep an eye on the long-range for the 30th and 31st, but as always, the further out you go, the less certain it is.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Fri afternoon, min 9°C on Fri morning). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Sat afternoon, min 10°C on Mon night). Wind will be generally light.

Wed
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
!
!
2
0
0
3
2
2
3
3
2
3
1
1
1
0
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.3
SW
12
2.5
SW
12
3
SW
13
3
SW
13
2.3
SW
12
1.9
SW
11
1.4
SSW
11
1.2
WSW
11
1.3
SSW
12
1.5
SW
11
2.1
SW
11
2.2
SW
13
2.1
WSW
12
1.9
WSW
12
1.4
WSW
12
1.4
SSW
11
2.1
SW
14
2.1
SW
14
1.7
SW
13
1.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
1451
1991
3475
2369
1422
882
469
329
543
534
981
1575
1363
988
521
486
1804
1610
966
915
Wind (km/h)
10
SW
5
NNW
5
ENE
15
SSE
15
ENE
20
E
15
ESE
10
WSW
20
WNW
20
W
5
SE
5
ESE
15
S
10
ESE
15
SE
20
SE
20
E
25
E
20
E
15
ENE
Wind State
cross
glassy
glassy
on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
on
on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross
High Tide
7:25PM1.19m
7:59AM1.02m
8:25PM1.07m
9:40AM0.94m
10:21PM1.01m
11:56AM0.98m
00:08AM1.06m
1:01PM1.09m
1:04AM1.17m
1:39PM1.22m
1:42AM1.27m
2:10PM1.34m
2:15AM1.37m
Low Tide
1:50AM0.57m
1:50PM0.65m
3:11AM0.66m
3:39PM0.74m
5:33AM0.65m
6:08PM0.70m
6:49AM0.56m
7:10PM0.59m
7:30AM0.44m
7:48PM0.48m
8:02AM0.33m
8:19PM0.37m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:16
7:16
7:15
7:13
7:13
7:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:15
6:15
6:16
6:17
6:17
6:19
 mm
Temp °C
15
14
14
15
13
14
19
14
17
18
15
15
16
13
16
18
15
17
24
23
Feels °C
13
12
13
13
11
10
16
11
13
14
14
14
14
12
13
14
12
12
20
19
  • 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