Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.7°C
1.0° 

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


Onrus surf forecast from 30 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 5PM (local time) - 10ft (3.0m), 13s period, SW swell with cross-shore winds.
  • Most powerful swell: Thursday 3 Sep, 2PM (local time) - 21ft (6.5m), 12s period, SSW swell with 11,531 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 11AM (local time) - 6ft (1.8m), 11s 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 Monday (Aug 31) at 11AM. The primary swell is predicted to be 1.8m and 11s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 6.5m 12s and forecast to arrive on Thursday (Sep 03) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 03) at 2AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Mon 31st Aug)6ft (1.8m) 11s
Best Surf 5PM (Tue 1st Sep)10ft (3.0m) 13s
Most Powerful 2PM (Thu 3rd Sep)21ft (6.5m) 12s

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


The Lowdown

Alright, this is Rusty, and I’m looking at the coming weeks for our corner of the coast. We’ve got a real mix of waiting and fire, so let’s get into it.

The first real action kicks off on Monday, the 31st of August. The morning is looking special. At Onrus, we’ve got a clean 6ft swell from the SW, with a long 11-second period. The wind is glassy – dead calm, 3 mph from the south. That’s going to put a nice shine on the reef. The water’s sitting at 59°, which is a bit colder than normal for this time of year, so a decent wetsuit is a must. This is a standout session for the early part of the forecast.

Then we get a real treat on Tuesday, the 1st of September. The morning will see a solid 8ft groundswell from the SW, with a period stretching to 13 seconds. That’s a lot of energy in the water (2248 combined energy). The wind is light offshore out of the WSW at 6 mph, making for clean, lined-up waves. This is premium for experienced surfers. The afternoon gets bigger, hitting 10ft, but that’s crossing the threshold into too big for this break, and the wind shifts a bit, so stick to the morning.

From Wednesday, the 2nd, things start to get messy. The swell stays big, up to 10ft, but the wind swings onshore and picks up, making for choppy, poor conditions. That trend continues right through the first week of September. The swell gets massive on Thursday, the 3rd, with a 20ft SW swell and crazy energy (9314), but it’s accompanied by strong onshore winds. Unless you’re a tow-in crew, this is more of a kite-surfing show than a paddle session.

We hit a major dry spell from Friday, the 4th, through to Tuesday, the 8th. The wind is relentless, mostly cross-onshore and fresh, and the swell drops right off. It’s a real flat and blown-out period.

We finally get a respite on Wednesday, the 9th of September. The morning is glassy again, with a tiny 3ft swell from the SSE. It’s small, but clean. The same goes for the afternoon. The real reward, however, is Monday, the 14th of September. The morning sees a 4ft SSW swell with a 12-second period, and the wind is offshore from the NW at 9 mph. That’s a clean, gentle offshore breeze, and the reef at Onrus will be working. The afternoon stays good with a similar 4ft swell and a moderate offshore wind. This is the best bet in the second week, but it’s a long way out, so keep an eye on the forecasts.

For the best of the best, lock in Monday morning, 31st August, and Tuesday morning, 1st September. The rest of the window is either too big, too windy, or too small. Stay patient.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 15°C on Sun afternoon, min 9°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Thu night. Very mild (max 18°C on Wed afternoon, min 10°C on Fri night). Winds increasing (light winds from the NW on Wed night, strong winds from the SSE by Thu night).

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
3
3
2
4
4
!
!
!
0
4
!
0
0
0
0
1
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SW
12
2.3
SW
12
2.1
SW
12
1.8
SW
11
1.8
SW
11
2.2
SW
11
2.5
SW
13
3
SW
13
3.5
SW
14
3
SW
14
2.5
SW
13
2.2
SW
13
6
SW
12
5
SSW
12
4.5
SSE
11
2.5
SE
11
2.1
SE
10
1.3
WSW
11
1
WSW
10
0.7
SSW
20
1.9
SSW
16
Wave Graph
Metric surfscale
Energy kJ
1739
1444
1162
828
752
1183
2248
2917
4008
2887
2275
1583
9314
7368
4232
1576
977
389
229
342
1855
Wind (km/h)
15
SE
20
SSE
10
ENE
5
S
10
SSW
5
NW
10
WSW
5
SW
15
NE
10
ESE
20
SSE
15
N
15
ENE
20
SSE
35
SSE
35
ESE
30
SE
15
ENE
25
E
30
ESE
20
E
Wind State
on
on
cross
glassy
cross
glassy
cross-off
cross
cross
cross-on
on
cross-off
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
High Tide
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
7:53AM1.12m
8:28PM1.19m
9:44AM1.06m
10:28PM1.15m
Low Tide
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
1:53PM0.55m
3:13AM0.54m
3:56PM0.62m
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
rain showers
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:03
7:01
7:01
7:00
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:22
6:23
6:24
6:24
6:25
6:27
 mm
6
Temp °C
14
15
12
12
13
11
14
15
13
16
18
15
15
15
14
15
15
12
14
18
14
Feels °C
9
10
8
10
11
10
12
13
13
13
14
13
11
10
6
8
7
8
9
11
9
  • 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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