Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.3° C
0.3° 

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


Onrus surf forecast from 2 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 8PM (local time) - 10ft (3.0m), 15s period, WSW swell with offshore winds.
  • Most powerful swell: Thursday 6 Aug, 2AM (local time) - 11ft (3.5m), 14s period, WSW swell with 4,018 kJ wave energy.
  • Next surfable swell (1★+): Sunday 2 Aug, 8PM (local time) - 3.5ft (1.1m), 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 Sunday (Aug 02) at 8PM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 0.8m and 15s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.5m 14s and forecast to arrive on Thursday (Aug 06) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Aug 05) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Sun 2nd Aug)3.5ft (1.1m) 12s
Best Surf 8PM (Wed 5th Aug)10ft (3.0m) 15s
Most Powerful 2AM (Thu 6th Aug)11ft (3.5m) 14s

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


The Lowdown

Alright, let’s get into it. The only break on the cards for this 16-day window is Onrus, a reef setup that’s exposed to the SW. It’s an inconsistent wave, so you’ve gotta be patient around here, but when it turns on, it can be a gem.

Water temp is sitting at 60°, which is about where you’d expect it for this time of year – nothing wild there.

The swell really finds its rhythm starting Sunday the 2nd of August. You’ve got a 4ft SW groundswell rolling in with a 12-second period, and the wind is dead glassy. The water is like a mirror. Onrus is exposed, so that SW direction is spot on. The energy is moderate (508), but it’s not about the size – it’s about the lack of any wind. This is the kind of session where you just sit out there and let the sets find you. That’s the standout moment in the early part of the outlook.

Monday morning the 3rd builds on that: 5ft of SW swell, 13-second period, and again glassy conditions. The energy is bumped up a notch (747). This is clean, lined-up reef surfing. The afternoon gets a bit of a cross-on breeze, so the morning is your window.

Tuesday the 4th is still surfable, with 5ft SW swell and a cross-off breeze in the morning keeping things clean, but the energy starts to drop (451).

Then Wednesday the 5th throws down a proper pulse. The swell jumps to 6ft from the SW, period stretching to a very long 16 seconds, and the wind is offshore from the WNW at 12 mph. The combined energy is strong (1831). This is a serious swell, and for a reef like Onrus, that long period will draw clean lines. The size is getting into intermediate territory, but it’s still manageable. The morning is the call here – the afternoon has a 19 mph breeze that makes it skatey. This is your second standout: a solid, powerful, clean swell.

Thursday the 6th and Friday the 7th see the swell pumping up to 10ft, which is too big for Onrus. The energy is massive (3009 and 2967), but the break can’t handle it. The Friday afternoon does see a 8ft SW swell with a clean cross-off breeze, but it’s still big for this spot. That’s when you need to be an experienced surfer or just watch from the shore.

The weekend of the 8th and 9th is a mix of way too big (12ft on Saturday, with 3718 energy) and then sloppy, strong wind on Sunday. Not worth paddling out.

There’s a bit of a lull Monday the 10th morning, with a small 4ft swell and glassy conditions (367 energy), but it’s a shadow of the earlier days. Then from Monday afternoon right through to the 12th, the swell just explodes – 15ft, 18ft, 12ft – all completely out of the question for Onrus. The energy numbers are off the charts (3791, 13505, 6568). That’s kite-surfing territory, not paddle surfing.

Things drop back down on Thursday the 13th of August. The swell is 6ft from the SSE, with a 14-second period, and a clean cross-off breeze. The energy is still strong (1703), but the size is back in range. The afternoon is even better with 5ft and the same clean conditions. That’s a good day for a reef.

The final weekend from the 14th to the 17th is mostly messy or small, with onshore winds and poor conditions. The 16th of August has a clean 5ft swell in the morning, but it’s marginal.

So, the absolute best of the bunch: Sunday the 2nd and Monday the 3rd of August for that glassy, small but perfect reef wave. Wednesday the 5th of August for the punch and power. Those are the sessions you don’t miss.

Rusty

Short Range Forecast

Mostly dry. Warm (max 22°C on Mon afternoon, min 15°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Thu morning. Very mild (max 19°C on Wed afternoon, min 11°C on Thu night). Winds decreasing (fresh winds from the WNW on Wed afternoon, calm by Fri afternoon).

Sun
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
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
3
2
2
2
1
2
4
2
!
!
3
!
!
4
4
3
!
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
1.3
SW
13
1.4
SW
13
1.1
WSW
13
1.4
SW
12
1.4
SW
11
1.1
SW
11
0.7
SW
14
1.9
SW
16
2.1
SW
15
3.5
WSW
14
3
SW
13
2.5
SW
13
3
SW
14
3
SW
14
2.5
SW
14
2.5
SW
14
2.3
SW
13
3.5
SW
13
2.5
SW
12
Wave Graph
Metric surfscale
Energy kJ
386
609
639
402
568
439
292
206
1787
1833
4018
2914
2272
3261
2967
2448
2657
1862
3718
2010
Wind (km/h)
0
SE
10
ENE
0
NE
5
SSE
10
NE
10
WSW
5
SW
5
N
20
WNW
30
WNW
25
NNW
5
N
10
SE
15
ENE
15
NE
10
WSW
15
WNW
25
WNW
35
NW
35
W
Wind State
glassy
cross
glassy
cross-on
cross
cross-off
cross
cross-off
off
cross-off
cross-off
glassy
on
cross-on
cross
cross-off
cross-off
off
off
cross-off
High Tide
5:34PM1.57m
5:47AM1.39m
6:08PM1.53m
6:26AM1.32m
6:48PM1.46m
7:13AM1.23m
7:37PM1.37m
8:16AM1.13m
8:47PM1.27m
9:48AM1.08m
10:22PM1.23m
11:33AM1.12m
11:57PM1.28m
Low Tide
11:47PM0.23m
11:49AM0.22m
00:25AM0.27m
12:25PM0.30m
1:09AM0.33m
1:10PM0.39m
2:06AM0.41m
2:11PM0.50m
3:28AM0.47m
3:45PM0.57m
5:11AM0.46m
5:37PM0.54m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
mod rain
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:35
7:33
7:33
7:31
7:31
7:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:02
6:04
6:05
6:06
6:06
6:07
 mm
4
6
4
Temp °C
21
17
20
22
19
18
18
16
18
19
15
13
14
13
13
17
14
14
16
14
Feels °C
17
16
19
20
17
16
16
16
13
13
12
11
12
10
10
17
13
9
8
8
  • Map Icons:
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  • 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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