Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 26 Jul 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 26 Jul 2026:

  • Best quality surf: Sunday 2 Aug, 8AM (local time) - 8ft (2.5m), 18s period, SW swell with cross-offshore winds.
  • Most powerful swell: Monday 27 Jul, 5PM (local time) - 11ft (3.5m), 17s period, SSW swell with 5,938 kJ wave energy.
  • Next surfable swell (1★+): Monday 27 Jul, 5AM (local time) - 7.5ft (2.3m), 13s 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 (Jul 27) at 5AM. The primary swell is predicted to be 2.3m and 13s period with a secondary swell of 0.4m and 12s. 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 17s and forecast to arrive on Monday (Jul 27) 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 1.8m 6s period and expected on Tuesday (Jul 28) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 27th Jul)7.5ft (2.3m) 13s
Best Surf 8AM (Sun 2nd Aug)8ft (2.5m) 18s
Most Powerful 5PM (Mon 27th Jul)11ft (3.5m) 17s

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


The Lowdown

Alright, this is Rusty. Let’s have a look at what’s cooking for Onrus over the next couple of weeks.

Right now, there’s a bit of a wait. The first real surf we can talk about shows up Sunday afternoon, the 26th of July. Onrus is seeing a 6ft swell from the SW, period of 12 seconds, with a light cross breeze. The combined energy is moderate at 1168 – it’s not a stand-out, but it’s rideable. The water is sitting at 60°, which is about normal for this time of year, so nothing weird there.

The next few days are pretty grim. Monday through to Wednesday morning of the 29th, the wind is a mess – onshore or cross-onshore, with speeds ramping up to 22 mph. The swell is all over the place, but it’s blown out and lumpy. You can forget about those sessions.

Then, Wednesday afternoon the 29th, things get interesting. The wind drops to glassy – 3 mph from the WSW – and we’ve got a 5ft SW swell with a 13-second period. The energy is 919, so it’s moderate, but that glassy wind means clean, peeling waves. This is a bright spot, but it’s not the best of the run.

We’ve got another gap of poor conditions through Thursday, Friday, and Saturday morning the 1st of August. The wind is either cross-on or onshore, and the swell drops off to 3ft to 4ft, not enough to get excited about.

Now, here’s where it gets good. The standout window is Sunday morning, the 2nd of August. Onrus is going to fire. We’re looking at a 8ft SW swell, period of 17 seconds – that’s a very long period groundswell. The energy is strong at 3453. The wind is glassy from the north, 3 mph. That’s clean, powerful, and lined up. This is a reef break, and that long period will suit it perfectly. It’s going to be a bit heavy for beginners, but for intermediates and above, it’s the best on offer. The crowd situation is “sometimes,” so you might have company, but it’s not a circus.

Sunday afternoon the 2nd holds up with an 8ft SW swell, 16-second period, and a clean cross-off breeze. Energy is still strong at 3116. Monday morning the 3rd is also excellent – 6ft SW, 14 seconds, and a clean offshore wind from the NW at 12 mph. Energy is 1423. That’s a solid session.

We then get a few more clean days, but the swell starts to drop. Tuesday the 4th has a 7ft WSW swell with a 12-second period and offshore wind – good, but not the peak. The energy is 1923.

Then, from the 5th of August onward, the swell gets huge. We’re talking 16ft waves with extreme energy values like 12156. This is too big for Onrus, even for experts. The wind and tide might be favorable, but the size is just plain dangerous. The same goes for the next several days. It’s a washout until the 10th of August, when we see another 12ft swell, but again, that’s too big for this spot.

So, to wrap it up: the best surf is unquestionably Sunday the 2nd of August, with Sunday afternoon and Monday the 3rd as excellent backups. Everything else is either blown out, too small, or way too big. The water is normal temp, the reef will handle the long period, and the wind will be clean. Get out there.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Mon morning. Very mild (max 19°C on Sun afternoon, min 10°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the E by Tue afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 22°C on Sat morning, min 10°C on Fri morning). Wind will be generally light.

Sun
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
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
0
0
0
0
0
0
2
3
3
2
0
0
0
0
1
2
2
3
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
SW
12
2
SW
13
2.5
SW
17
3.5
SSW
17
3
SSW
15
2.3
SW
14
2.5
SSW
14
1.9
SW
13
1.7
SW
13
1.6
SW
13
1.6
SW
13
1.5
SW
13
1.5
SW
13
1.3
SW
13
1.1
SW
12
1
SW
12
1
SW
11
1.3
SW
14
1.3
SW
13
1.2
SW
20
Wave Graph
Metric surfscale
Energy kJ
778
1259
3950
5938
3899
2263
2534
1299
996
919
821
734
746
591
373
278
246
639
527
1122
Wind (km/h)
10
SW
10
SSW
25
SE
25
ESE
30
E
35
E
35
E
30
E
20
NE
5
WSW
5
NNE
10
ENE
20
SE
20
ENE
20
E
10
E
15
NE
10
NE
10
E
10
NE
Wind State
cross
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
glassy
glassy
cross-on
on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
High Tide
1:58AM1.29m
2:31PM1.31m
2:34AM1.36m
3:04PM1.39m
3:07AM1.42m
3:34PM1.47m
3:39AM1.46m
4:04PM1.53m
4:10AM1.48m
4:34PM1.57m
4:41AM1.47m
5:03PM1.58m
Low Tide
8:01PM0.49m
8:23AM0.33m
8:37PM0.40m
8:55AM0.25m
9:10PM0.33m
9:24AM0.19m
9:42PM0.28m
9:52AM0.14m
10:12PM0.24m
10:20AM0.12m
10:43PM0.22m
10:48AM0.13m
11:14PM0.21m
clear
part cloud
light rain
light rain
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:41
7:39
7:39
7:37
7:37
7:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:58
5:58
5:59
6:00
6:00
6:00
6:01
 mm
1
1
Temp °C
19
15
15
14
13
15
16
13
14
18
15
15
17
14
14
20
17
22
25
22
Feels °C
17
15
13
8
7
8
8
6
10
17
14
13
14
10
10
18
13
18
22
19
  • 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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