Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.5°C
1.2° 

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


Onrus surf forecast from 15 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with cross-shore winds.
  • Most powerful swell: Wednesday 16 Sep, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with 3,504 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 2AM (local time) - 10ft (3.0m), 14s 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 Wednesday (Sep 16) at 2AM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 1.1m and 8s. 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 3.0m 14s and forecast to arrive on Wednesday (Sep 16) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 10s period and expected on Monday (Sep 21) at 2AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 16th Sep)10ft (3.0m) 14s
Best Surf 2AM (Wed 16th Sep)10ft (3.0m) 14s
Most Powerful 2AM (Wed 16th Sep)10ft (3.0m) 14s

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


The Lowdown

Right then, Rusty here. Let’s have a look at what Onrus has in store.

First thing you gotta know: the water’s sitting at 58°F, which is a bit colder than normal for this time of year. That anomaly of 2°F will have you reaching for the extra rubber.

Alright, so here we go. This is a proper frustrating forecast for us in the near term. There’s a gap of a full week with nothing worth paddling out for, starting from now. The first glimmer of hope isn't until Tuesday the 24th of September.

Tuesday 24th September is our standout. Onrus is a reef break, exposed to the SW, and we’ve got a nice 6ft SW swell rolling in with a long 13-second period. That’s proper groundswell energy, 1060 (moderate combined energy). The wind is a light WSW at just 6 mph, giving us a clean, cross-off breeze. This one is for the experienced crew, though – it's not a beginner wave at that size with that period. The morning looks excellent, and the afternoon is still worth it with a light cross-shore. Just a heads up, Onrus can get crowded sometimes, so expect a few locals out.

Wednesday 25th September you’ve got another chance. The swell is up to 6ft in the morning, still from the SW with that 13-second period, and the wind is a fresh offshore from the WNW at 19 mph. That’ll be clean but hard work to paddle into. The afternoon sees the swell push to 7ft – that's expert territory – but the wind eases to a moderate 16 mph from the west, keeping it cross-off and clean.

After that, it pretty much falls apart again. From Thursday the 26th through to the end of the run, it’s onshore winds and messy surf with a few long-period swells but no decent windows of clean conditions. Monday the 28th of September gets a big pulse of 12ft SSW swell (5033 combined energy – very strong), but the onshore wind is going to smash it up. That setup with the beach and reef would look way more interesting for a kite surfer than a paddle surfer to be honest.

So to wrap it up: ride the 24th and make the most of the 25th if you’re keen and experienced. The rest is a write-off.

Rusty.

Short Range Forecast

Moderate rain (total 18mm), heaviest on Tue night. Very mild (max 18°C on Tue afternoon, min 11°C on Wed night). Winds decreasing (near gales from the NW on Tue afternoon, light winds from the ESE by Wed night).

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sat night. Very mild (max 18°C on Fri afternoon, min 13°C on Fri morning). Winds decreasing (strong winds from the ESE on Fri afternoon, light winds from the E by Sun night).

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
!
1
0
1
0
0
0
0
0
0
0
0
0
2
0
2
1
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)
0.6
SW
18
1.2
SW
16
3
WSW
14
2.1
SW
9
2
WSW
13
2.5
SW
13
2.3
SW
12
2.2
SSW
12
2
SSW
11
1.6
SW
11
1.8
SW
13
1.6
SW
12
1.3
SW
12
1.2
SW
12
1.6
SW
13
1.8
SW
14
2.2
SW
14
1.9
SW
13
1.5
WSW
12
1.5
SW
12
1.4
SW
11
Wave Graph
Metric surfscale
Energy kJ
192
719
3504
654
1306
2000
1524
1355
1045
640
1053
812
448
389
852
1307
1849
1192
647
594
431
Wind (km/h)
40
NW
50
NW
25
SSW
20
SE
30
SE
20
E
25
SE
35
SE
25
ESE
40
ESE
40
ESE
35
ESE
30
ESE
30
SE
20
SE
15
SE
20
SE
15
E
15
ESE
30
ESE
15
E
Wind State
off
off
cross
on
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
cross-on
cross-on
on
cross-on
High Tide
5:29PM1.45m
5:48AM1.29m
5:59PM1.31m
6:20AM1.17m
6:32PM1.17m
7:03AM1.04m
7:21PM1.04m
8:35AM0.94m
9:27PM0.96m
11:23AM0.98m
11:40PM1.02m
12:29PM1.10m
00:36AM1.13m
Low Tide
11:18AM0.28m
11:43PM0.30m
11:46AM0.40m
00:13AM0.43m
12:16PM0.52m
00:49AM0.55m
12:56PM0.65m
1:53AM0.67m
2:37PM0.76m
4:44AM0.69m
5:48PM0.72m
6:14AM0.59m
6:45PM0.59m
clear
part cloud
rain showers
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
rain showers
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:41
6:39
6:39
6:37
6:35
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:34
6:35
6:35
6:36
6:37
6:37
6:37
 mm
18
3
Temp °C
17
18
14
15
16
13
14
16
14
17
18
15
16
16
16
16
16
15
17
19
15
Feels °C
9
9
5
9
10
8
9
9
8
8
9
8
10
12
12
14
13
12
14
14
11
  • 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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