Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 14 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 14 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 5AM (local time) - 10ft (3.0m), 14s period, SW swell with cross-onshore winds.
  • Most powerful swell: Wednesday 16 Sep, 5AM (local time) - 10ft (3.0m), 14s period, SW swell with 3,289 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 5PM (local time) - 3.5ft (1.0m), 12s 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 (Sep 14) at 5PM. The primary swell is predicted to be 1.0m and 12s period. The wind is predicted to be offshore 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 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Tuesday (Sep 15) at 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Mon 14th Sep)3.5ft (1.0m) 12s
Best Surf 5AM (Wed 16th Sep)10ft (3.0m) 14s
Most Powerful 5AM (Wed 16th Sep)10ft (3.0m) 14s

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


The Lowdown

Alright folks, Rusty here. Let's have a look at what's coming our way for the next couple of weeks.

We're startin' off with a bit of a tease, but there's some real quality if you're patient. The first surf worth paddlin' out for hits us on Monday, September 14th, at Onrus. It's a reef setup, so you'll want your wits about you. The water's sittin' at 58° which is a bit colder than normal for this time of year, so don't be shy with the rubber.

Monday 14th is the pick of the early week. We've got a clean 4ft swell from the SW with a nice long 12-second period, pushin' moderate wave energy (454). The wind is blowin' offshore from the NW at 12 mph, keepin' those faces smooth. You won't be alone though – this spot gets crowded sometimes, so get in early. Monday afternoon holds similar, just a tad smaller and a bit breezier.

Now Tuesday the 15th... it gets interesting but tricky. The morning shows a punchy 6ft swell from the WNW, but the period drops right off to a short 6 seconds. That's a lot of bumpy, weak energy. The wind is strong offshore at 25 mph, which will clean it up but makes paddlin' into those short-period lumps a real workout. Tuesday afternoon sees the swell drop to 4ft but the period jumps to a very long 16 seconds, and the wave energy kicks right up (1283). However, that strong 28 mph offshore wind means it’s going to be a battle to get out, even if the waves are clean. This one's for the fit lads only.

Then we hit a rough patch. From Wednesday 16th all the way through to the morning of Thursday 25th, it's pretty grim. We're talkin' strong onshore and cross-onshore winds from the SE and ESE, makin' a mess of even the decent-sized swells. There's some serious energy in the water mid-week (over 2000 at times), but with those winds, it's all chop and close-outs. Honestly, good for kites, not for your log. This stretch runs for over a week.

Finally, the light at the end of the tunnel. The standout window opens on Friday morning, September 25th. This is the one to circle. We've got a solid 7ft swell from the SSW with a nice 13-second period and powerful wave energy (1791). The wind? Dead calm. Glassy. Perfect conditions for experienced surfers. That's a fair bit of size though – over 8ft puts this firmly in the "experts only" zone. Expect a heavy, lined-up reef break.

Saturday the 26th is a nice follow-up for the less brave. The swell drops to 4ft from the SW, the energy backs off (571), but it's clean with a light WNW cross-offshore breeze in the morning. A great option for a fun, manageable session.

That's about it for the run home. The last few days of the month go back to onshore slop.

So to wrap it up: suffer through the wind for a week and a half, and you'll be rewarded with a stellar Friday the 25th. Monday the 14th is your early-week clean option. Stay safe out there.

Rusty.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Tue night. Very mild (max 19°C on Mon afternoon, min 12°C on Wed night). Winds increasing (light winds from the NW on Mon morning, strong winds from the NW by Tue afternoon).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu morning. Very mild (max 18°C on Fri afternoon, min 12°C on Thu morning). Winds decreasing (strong winds from the ESE on Fri night, moderate winds from the SE by Sat night).

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
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
2
2
1
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
12
1
SW
12
0.8
SW
12
0.6
SW
18
1.2
SW
16
3
WSW
14
1.9
SW
14
1.8
WSW
13
3
SW
13
2.5
SSW
12
2.1
SW
12
2.1
SSW
11
1.6
SW
11
1.6
SW
13
1.6
SW
13
1.6
SW
12
1.2
SW
12
1.9
SE
10
1.6
SW
14
1.7
SW
13
1.5
WSW
12
Wave Graph
Metric surfscale
Energy kJ
374
268
190
213
719
3183
1368
1155
2641
1844
1130
1107
640
919
878
712
403
798
872
1011
691
Wind (km/h)
20
NW
25
NW
20
NNW
40
NW
45
NW
25
SSW
20
SE
30
SE
20
ESE
30
ESE
35
SE
25
ESE
40
ESE
45
ESE
45
ESE
40
E
35
ESE
25
SE
20
S
20
S
15
E
Wind State
off
off
off
off
off
cross-on
on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
High Tide
4:59PM1.58m
5:18AM1.40m
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
Low Tide
10:49AM0.17m
11:15PM0.19m
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
rain showers
part cloud
part cloud
clear
cloud
heavy rain
rain showers
clear
part cloud
rain showers
part cloud
clear
clear
clear
clear
cloud
clear
rain showers
light rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:43
6:41
6:39
6:39
6:37
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:32
6:34
6:35
6:35
6:36
6:37
6:37
 mm
1
14
1
1
1
4
3
1
Temp °C
17
19
17
17
19
15
15
15
13
14
16
13
17
18
15
17
18
16
16
16
16
Feels °C
14
14
15
9
10
6
9
9
7
8
9
7
8
8
7
10
12
12
13
13
14
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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