Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.8°C
0.9° 

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


Onrus surf forecast from 2 Sep 2026:

  • Best quality surf: Wednesday 2 Sep, 5AM (local time) - 10ft (3.0m), 14s period, SW swell with cross-shore winds.
  • Most powerful swell: Sunday 6 Sep, 8AM (local time) - 8ft (2.5m), 19s period, SSW swell with 4,671 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 5AM (local time) - 10ft (3.0m), 14s 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 (Sep 02) at 5AM. The primary swell is predicted to be 3.0m and 14s period. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 2.5m 19s and forecast to arrive on Sunday (Sep 06) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Sep 07) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 2nd Sep)10ft (3.0m) 14s
Best Surf 5AM (Wed 2nd Sep)10ft (3.0m) 14s
Most Powerful 8AM (Sun 6th Sep)8ft (2.5m) 19s

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


The Lowdown

Alright, Rusty here. Let's have a look at what’s cooking for our stretch of coast.

Alright, listen up. The first bit of the forecast is a bit of a bummer, nothing happening right now, so we're sitting tight until Wednesday morning. The water temp is running about average for this time of year, nothing to write home about.

Wednesday, September 2nd – Morning
This is the one. Onrus is going to be pumping. We're looking at a solid 10ft SW groundswell with a long 13-second period, and the combined energy is a whopping 2802 (strong wave energy). What makes this a true standout is the glassy conditions – a 3 mph SE breeze. It's a reef break that's exposed to the SW, so it'll be handling that energy perfectly. The wind and tide are favorable, but heads up, this size is only for the experienced crew. It's inconsistent here, so the sets will have some time between them, but the payoff will be worth it. Crowds are possible.

Wednesday, September 2nd – Afternoon
The swell drops a touch to 8ft SW, but the wind swings to a cross-onshore 6 mph from the SSW. It gets a bit more challenging then, with the combined energy at 2381 (strong wave energy). It’s not the same quality as the morning.

Thursday, September 3rd – Morning
Swell backs off to 6ft from the WSW, period 12 seconds. Combined energy is 1338 (moderate wave energy). It's still a cross-onshore wind from the SSE at 6 mph. Nothing special.

Thursday, September 3rd – Afternoon through Saturday, September 5th
We hit a rough patch. Strong winds and poor conditions across the board. Onrus is exposed, and with the wind screaming, it's just not going to be worth paddling out. The setup looks more interesting for kite surfing than paddle surfing during this stretch.

Sunday, September 6th – Morning
We see a new pulse of long-period swell. A 7ft SW groundswell with an 18-second period rolls in, combined energy hitting 2935 (strong wave energy). But the wind is a moderate cross-onshore from the ENE at 12 mph, so it's choppy. It’s not clean enough to be a standout.

Monday, September 7th – Morning
Conditions clean up nicely. A 6ft SW swell with a 14-second period, and the wind goes cross-offshore from the WNW at 12 mph. Combined energy is 1117 (moderate wave energy). Clean waves, but the rating is marginal.

Tuesday, September 8th – Morning
Offshore wind! A 3ft WSW swell with 12-second period, and we get an offshore 12 mph WNW breeze. Combined energy is 422 (weak wave energy). Clean, but small.

Wednesday, September 9th – Morning
Another small, clean morning. 3ft WSW swell, 13-second period, cross-offshore WNW wind at 9 mph. Combined energy is 479 (weak wave energy).

Thursday, September 10th – Morning
The swell is starting to build again. 6ft SW swell, 11-second period, and a light cross-offshore 6 mph WNW wind. Combined energy is 814 (moderate wave energy). Very good surf conditions predicted, and it looks clean.

Friday, September 11th – Morning
Swell holds at 7ft SW, 12-second period, but the wind turns to a gentle cross-onshore from the SSE at 9 mph. Combined energy is 1458 (moderate wave energy). Gets a bit bumpy.

Saturday, September 12th – Morning
A bigger, lumpier swell. 8ft SSW groundswell with a 14-second period, but onshore SE wind at 12 mph. Combined energy is 2352 (strong wave energy). Not the one.

Sunday, September 13th – Morning
This is the other standout of the whole window. Glassy conditions again, with a 3 mph S breeze. We've got a 7ft SSW swell with a 12-second period, and the combined energy is 1627 (strong wave energy). Excellent surf conditions for experienced surfers. This one is special.

Sunday, September 13th – Afternoon
Swell drops to 5ft SW, 12-second period, but it stays glassy with a 3 mph ENE breeze. Combined energy is 973 (moderate wave energy). Very good conditions again.

After that, from Monday the 14th through to the end of the forecast period, the wind is mostly onshore or cross-onshore, and the conditions turn poor or marginal. There's a gap of a few days with no recommendations.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 17°C on Fri afternoon, min 12°C on Wed morning). Winds increasing (calm on Wed night, near gales from the ESE by Fri afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 25°C on Sun afternoon, min 12°C on Sat morning). Winds decreasing (strong winds from the ESE on Sat afternoon, light winds from the NNE by Sun night).

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
!
3
2
2
0
0
0
0
0
0
0
0
0
1
4
3
2
3
2
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)
3
SW
13
2.5
SW
13
2.3
SW
13
1.6
WSW
12
3
S
9
3
SSE
9
1.8
S
9
1.9
SSE
8
1.5
SE
7
1
SSW
10
0.9
SSW
10
1.4
SW
21
2.5
SW
18
2.1
SW
16
1.8
SW
15
1.8
SW
14
1.8
SW
13
1.1
SSW
12
1
SSW
11
0.9
SSW
11
0.8
WSW
13
Wave Graph
Metric surfscale
Energy kJ
2802
2381
1697
797
1645
1242
493
504
237
209
169
1796
3790
2113
1413
1262
1069
328
226
164
219
Wind (km/h)
5
SE
10
S
15
NE
10
SE
40
SE
40
ESE
45
ESE
50
ESE
40
E
40
E
45
ESE
35
E
25
E
20
ESE
5
WNW
20
WNW
30
WNW
10
NNW
5
WSW
5
SSW
5
N
Wind State
glassy
cross-on
cross
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
off
glassy
cross-on
cross-off
High Tide
6:18PM1.46m
6:47AM1.24m
7:09PM1.32m
7:53AM1.12m
8:28PM1.19m
9:44AM1.06m
10:28PM1.15m
11:40AM1.14m
00:06AM1.23m
12:49PM1.30m
1:08AM1.36m
1:37PM1.47m
1:55AM1.47m
Low Tide
11:59AM0.29m
00:39AM0.31m
12:45PM0.42m
1:37AM0.44m
1:53PM0.55m
3:13AM0.54m
3:56PM0.62m
5:16AM0.51m
5:56PM0.53m
6:34AM0.38m
7:05PM0.37m
7:26AM0.25m
7:53PM0.22m
clear
clear
part cloud
clear
light rain
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>
7:01
7:00
6:58
6:56
6:56
6:54
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:24
6:24
6:25
6:27
6:28
6:28
6:29
 mm
3
Temp °C
15
16
14
15
15
14
16
17
13
16
19
15
19
25
19
20
22
16
18
19
16
Feels °C
13
14
13
13
7
7
7
8
4
7
11
8
15
23
18
16
17
12
18
18
16
  • 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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