Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.0°C
0.7° 

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


Onrus surf forecast from 24 Aug 2026:

  • Best quality surf: Sunday 30 Aug, 11AM (local time) - 10ft (3.0m), 11s period, WSW swell with onshore winds.
  • Most powerful swell: Sunday 30 Aug, 5PM (local time) - 10ft (3.0m), 12s period, WSW swell with 2,689 kJ wave energy.
  • Next surfable swell (1★+): Thursday 27 Aug, 8AM (local time) - 4.5ft (1.4m), 12s period with SSW 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 Thursday (Aug 27) at 8AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.8m and 12s. 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 3.0m 12s and forecast to arrive on Sunday (Aug 30) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Saturday (Aug 29) at 2PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Thu 27th Aug)4.5ft (1.4m) 12s
Best Surf11AM (Sun 30th Aug)10ft (3.0m) 11s
Most Powerful 5PM (Sun 30th Aug)10ft (3.0m) 12s

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


The Lowdown

G'day, Rusty here. Let's have a look at what Onrus has got lined up for us over the next couple of weeks. Right now, the water’s sitting at about 59°, which is pretty close to average for this time of year – nothing unusual there.

The first decent window isn't until Thursday, 27th August. There's some wait though – the first few days are pretty average. Monday and Tuesday are a write-off with messy, cross-onshore winds, small lumpy swell and poor conditions. Not worth paddling out. Wednesday, 26th August does not improve – strong cross-onshore breeze and lumpy surf.

Thursday morning, 27th August is where things start to look up. We've got clean conditions with light cross-offshore breezes and a 5ft swell coming from the S, with a period of 12 seconds. The wave energy is moderate (685), and the forecast says expect very good surf conditions. This carries through to the afternoon, too. Onrus is a reef break and can be inconsistent, so keep that in mind, but with clean lines and that SSW optimum direction, it’s a solid option.

Friday, 28th August turns poor again – light cross-onshore winds and smaller swell.

Saturday, 29th August returns to clean conditions. Saturday morning with a light cross-offshore breeze and 3ft swell from the WSW, 13-second period, and clean conditions. Saturday afternoon bumps up to 6ft from the W with a moderate cross-offshore breeze – still clean and looking good.

Sunday, 30th August sees a big jump in size, but the morning swell hits 10ft from the WSW, and while the wind and tide are favorable, that is too big for this break, especially for intermediates. Experts might look at it, but it’s marginal.

Now, here's the standout. Monday, 31st August – glassy conditions, no wind, with a 8ft WSW swell and a 12-second period. That’s excellent surf for experienced surfers. The wave energy is strong (1597). The optimum direction matches up nicely, and with glass, it’s going to be clean as a whistle. This is the pick of the period.

Tuesday, 1st September continues the quality. Glassy again in the morning with a 7ft SW swell, 11-second period. Then the afternoon turns on with clean, cross-offshore breeze and a 7ft SW swell, 14-second period. Excellent conditions for experienced surfers again.

Then we hit a massive pulse. Wednesday, 2nd September sees huge 18ft to 20ft swell from the WSW, but it's accompanied by near gale-force winds – poor conditions for paddling. Thursday, 3rd September is even bigger, with 20ft SW swell and a 17-second period, but again, the swell is too big for this break even with clean winds. Friday, 4th September has cleaner offshore winds and 13ft to 12ft SSW swell, but again, too big for anything but the absolute experts.

From Saturday, 5th September onwards, it drops back down, but the winds turn onshore and choppy again, with poor conditions through to Tuesday, 8th September.

So, to sum it up: the best on offer is Monday, 31st August with glassy, 8ft WSW swell, and Tuesday, 1st September morning with glassy 7ft SW swell. After that, it’s all too big or blown out.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Tue afternoon, min 10°C on Mon night). Winds increasing (light winds from the E on Mon morning, fresh winds from the E by Wed morning).

Days 4-6 Weather Summary

Mostly dry. Warm (max 30°C on Fri afternoon, min 14°C on Sat night). Wind will be generally light.

Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
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
1
1
0
0
0
0
1
3
3
3
0
0
2
3
3
3
!
0
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
WSW
11
1.4
SSW
11
2.3
SW
14
2.4
SW
14
2.3
SW
14
2
SW
13
1.3
WSW
13
0.9
SSW
16
1.5
S
11
1.4
S
12
1.4
S
11
1.3
S
11
1.1
S
11
0.8
WSW
14
0.8
WSW
13
1
WSW
13
1.7
W
12
2.5
WSW
13
3
WSW
11
3
WSW
12
3
WSW
12
Wave Graph
Metric surfscale
Energy kJ
706
425
2216
2358
1977
1326
512
392
556
519
492
410
279
243
209
312
800
2345
1782
2689
2440
Wind (km/h)
10
SE
15
SSE
15
E
15
E
25
ESE
25
E
35
E
35
E
15
ENE
5
W
10
W
5
NE
10
E
10
ENE
20
NW
10
W
20
W
10
S
20
SE
20
SSE
15
S
Wind State
on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
glassy
cross-on
cross-on
off
cross-off
cross-off
cross-on
on
cross-on
cross-on
High Tide
1:39PM1.22m
1:42AM1.27m
2:10PM1.34m
2:15AM1.37m
2:38PM1.46m
2:45AM1.46m
3:06PM1.56m
3:15AM1.52m
3:34PM1.64m
3:45AM1.55m
4:02PM1.68m
4:16AM1.55m
4:32PM1.68m
4:48AM1.52m
Low Tide
7:48PM0.48m
8:02AM0.33m
8:19PM0.37m
8:29AM0.23m
8:48PM0.27m
8:56AM0.15m
9:17PM0.18m
9:23AM0.10m
9:46PM0.12m
9:50AM0.07m
10:15PM0.09m
10:19AM0.07m
10:46PM0.09m
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
clear
part cloud
clear
part cloud
part cloud
part cloud
cloud
light rain
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:13
7:11
7:09
7:09
7:07
7:05
7:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
6:19
6:20
6:21
6:21
6:22
6:22
 mm
2
1
Temp °C
14
16
12
14
19
14
16
19
16
21
23
18
24
30
26
18
18
15
14
15
14
Feels °C
12
13
10
11
14
10
9
13
14
19
20
17
20
27
22
16
15
13
12
11
10
  • 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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