Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 pm 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.8°C
0.8° 

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


Onrus surf forecast from 28 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 2PM (local time) - 10ft (3.0m), 13s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 2AM (local time) - 11ft (3.5m), 14s period, SW swell with 3,788 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 2AM (local time) - 3.5ft (1.0m), 13s 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 Saturday (Aug 29) at 2AM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 0.7m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.5m 14s and forecast to arrive on Wednesday (Sep 02) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 7s period and expected on Friday (Sep 04) at 8PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sat 29th Aug)3.5ft (1.0m) 13s
Best Surf 2PM (Tue 1st Sep)10ft (3.0m) 13s
Most Powerful 2AM (Wed 2nd Sep)11ft (3.5m) 14s

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


The Lowdown

Right then, let’s have a look at what Onrus has got cooking for us over the next couple of weeks. This is a reef setup, exposed to the south-west, and it’s inconsistent, so you’ve gotta pick your moments here. When it’s on, it’s a proper little wave, but you can’t just rock up any old time.

We kick things off on Saturday the 29th of August with a bit of a mixed bag. The morning is actually the pick of the first few days. We’ve got a clean 3.6ft swell pushing in from the WSW with a solid 13-second period, giving it some decent push. The wind is a light NNE cross-off, keeping the face nice and clean. The combined energy is sitting at 705, which is a moderate amount of grunt for the size. It’s not huge, but it’ll be fun and lined up. This is a solid little window.

Saturday afternoon takes a turn though. The swell jumps up to 6.2ft from the SW, but the wind swings around to a cross-shore and it gets a bit lumpy with a cross-chop. The energy jumps to 1701, which is strong, but the quality drops. It’s a bit of a write-off for paddle surfing.

Sunday the 30th is a no-go for me. We’re looking at 7.9ft of swell on Sunday morning, but the wind is onshore and the conditions are unknown. By the afternoon it’s a choppy cross-on mess with 7.2ft. Not worth the paddle.

Monday the 31st offers a little hope. The morning is small with a 5.9ft SW swell, but a slight cross-on breeze is putting small ripples on it. The energy is moderate at 830. The afternoon, however, cleans right up. The wind goes cross-off from the WSW, the swell drops to a clean 5.6ft from the SW with an 11-second period, and you get that glassy texture. The energy is 704, moderate but clean. That’s a solid session for the intermediate crew.

Now, Tuesday the 1st of September is where it gets interesting. The morning is firing. We’ve got 8.2ft of clean groundswell from the SW with a 13-second period. The wind is a light WNW cross-off, and the combined energy is a hefty 2121. This is strong, powerful reef energy. For experienced surfers, this is the standout of the whole run. The swell direction matches the optimum, and with that clean offshore breeze, you’re looking at some proper walls.

Tuesday afternoon, though, it gets too big. That same swell pushes up to 9.8ft, and while the wind is still cross-off, the forecast says it’s simply too much for this break. The energy is at 3013, which is very strong. Only absolute experts with a death wish are going out there.

Wednesday the 2nd and Thursday the 3rd are a write-off. The swell stays big, around 9.8ft, but the wind goes onshore and cross-on, turning it into a choppy, lumpy mess. By Thursday afternoon, the wind is up to 25-35 mph and it’s blown out.

Friday the 4th of September is a complete blowout with near-gale force winds. Don’t even think about it. That lasts all the way through to the morning of Saturday the 5th.

Saturday afternoon on the 5th finally offers a reprieve. The swell drops right back to a tiny 3.0ft from the SSW, but the wind goes glassy. Dead calm. The energy is very weak at 410, but if you’ve got a log, it could be a fun little summer-style session. It’s one to watch.

Sunday the 6th has a bit of a pulse. Morning sees a clean 4.3ft from the SW with a very long 16-second period. The energy is moderate at 897. That long period stuff can be a bit straight at a reef, but the wind is a good cross-off. It’s worth a look for the more experienced, as the sets will have heaps of push. The afternoon is poor again with onshore rain.

Then we hit a long, quiet spell. From Monday the 7th through to Wednesday the 9th, we have tiny, weak swell and strong cross-onshore winds. Nothing doing.

On Wednesday the 9th of September, we get a couple of tiny but clean windows. Both morning and afternoon see a 2.6ft SW swell with a 12-second period and light cross-off winds. The energy is weak at 278 and 225. It’s a longboard

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 17°C on Fri night, min 9°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Thu morning. Very mild (max 17°C on Wed afternoon, min 11°C on Mon night). Winds increasing (light winds from the NW on Mon night, strong winds from the SE by Thu morning).

Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
2
2
2
1
3
2
3
3
4
!
!
!
0
2
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
WSW
13
1.1
WSW
13
1.9
SW
10
2
SW
9
2.4
WSW
12
2.2
SW
12
2.1
SW
12
1.8
SW
11
1.7
SW
11
1.7
SW
11
2.5
SW
13
3
SW
13
3.5
SW
14
3
SW
13
3
SW
13
2.4
SW
13
2.1
SW
12
2.4
SW
11
2.2
SSE
9
Wave Graph
Metric surfscale
Energy kJ
302
414
725
607
1688
1369
1162
828
702
651
2121
3013
3788
3041
2614
1912
1302
1370
721
Wind (km/h)
5
ESE
15
NNE
20
SW
15
S
15
SE
20
SSE
15
ENE
5
S
10
WSW
10
NW
10
WNW
20
WNW
15
ESE
15
ESE
25
SE
15
E
40
SE
30
ESE
45
ESE
Wind State
glassy
cross-off
cross
cross-on
on
cross-on
cross
cross-on
cross-off
off
cross-off
cross-off
cross-on
cross-on
on
cross-on
on
cross-on
cross-on
High Tide
3:45AM1.55m
4:02PM1.68m
4:16AM1.55m
4:32PM1.68m
4:48AM1.52m
5:04PM1.65m
5:22AM1.46m
5:38PM1.57m
6:00AM1.36m
6:18PM1.46m
6:47AM1.24m
7:09PM1.32m
Low Tide
9:46PM0.12m
9:50AM0.07m
10:15PM0.09m
10:19AM0.07m
10:46PM0.09m
10:49AM0.11m
11:19PM0.13m
11:22AM0.18m
11:55PM0.20m
11:59AM0.29m
00:39AM0.31m
12:45PM0.42m
1:37AM0.44m
cloud
cloud
light rain
light rain
part cloud
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
light rain
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:05
7:03
7:01
7:01
7:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:21
6:22
6:22
6:22
6:23
6:24
6:24
 mm
1
1
2
1
Temp °C
17
16
17
14
14
14
12
12
13
12
14
16
15
14
17
13
14
15
14
Feels °C
16
13
14
11
10
10
8
10
11
10
12
12
13
11
14
8
8
9
6
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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