Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 pm 14 Jul 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.0° C
0.6° 

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


Onrus surf forecast from 15 Jul 2026:

  • Best quality surf: Wednesday 15 Jul, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with glassy winds.
  • Most powerful swell: Tuesday 21 Jul, 8AM (local time) - 11ft (3.5m), 16s period, SW swell with 5,973 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 15 Jul, 5AM (local time) - 1.5ft (0.5m), 17s 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 (Jul 15) at 5AM. The primary swell is predicted to be 0.5m and 17s period with a secondary swell of 0.7m and 9s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.5m 16s and forecast to arrive on Tuesday (Jul 21) at 8AM. Winds are predicted to be 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 (Jul 22) at 2AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 15th Jul)1.5ft (0.5m) 17s
Best Surf 8PM (Wed 15th Jul)10ft (3.0m) 14s
Most Powerful 8AM (Tue 21st Jul)11ft (3.5m) 16s

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


The Lowdown

Alright, Rusty here. Let's chew the fat on this patch of coast.

Right off the bat, we're looking at Onrus, a reef break that's a bit of a diva—it's inconsistent, so when it turns on, it's a special thing. The water temp is sitting right around average for this time of year, nothing to write home about. The first few days have some real promise, but we've got a mix of clean waves and some proper, growling, expert-only swell coming through.

Wednesday morning, the 15th, kicks things off with a clean 4ft SW groundswell. The period is a juicy 17 seconds, which is proper long-period energy, and the combined energy is a solid 1340. The wind is a gentle offshore, so the face will be smooth. It's a proper reef set-up, so that long period will wrap in nicely. This is a good one for the experienced crew.

Thursday the 16th is the standout of the first week. The morning is looking glassy with a 8ft SW swell, period easing to 13 seconds. That’s still a solid groundswell with plenty of push (energy reading 2108). The wind is dead calm, glassy conditions. It's nearly perfect. It's a bigger wave, so keep your wits about you, but for the confident surfer, this is the session to circle. The afternoon stays clean with a cross-off breeze and a 7ft swell.

Friday the 17th is a write-off. The wind swings onshore, and the waves get choppy. It’s a messy cross-on mess, so give it a miss.

We get a bit of a breather on the 18th and 19th. Saturday morning is small, down to 3ft, but clean. The afternoon picks up to 4ft with a 12-second period, and the energy is moderate at 551. It’s clean, fun, but not the big stuff. Sunday is a step up to 6ft, but the wind goes cross-shore, so it's a bit bumpy.

Monday the 20th morning is a real gem. A 7ft SW swell, 11-second period, and it's glassy again. The energy is solid at 1104. This is another top session for the experienced surfer, clean and powerful.

Now, listen up. From Tuesday the 21st all the way through to the end of the month, this place goes completely mental. We’re looking at swell heights of 10ft to 13ft, with massive energy readings between 3300 and nearly 7000. For a wave over 8ft, it's expert territory only. Onrus is a reef break, so it can handle the size, but the swell is just too big. Even with the offshore winds on Tuesday, Wednesday, and Thursday, the forecast notes say it's too big for the break. A few days in the second week, like the 24th and 26th, have cleaner conditions, but the swell is still in the 8ft to 12ft range, which is all big-wave territory. The 27th is a bit smaller, 4ft to 5ft, and glassy, which is a nice option for the end of the run.

The bottom line? The best surfing is on Thursday the 16th and Monday the 20th. Those are the ones with the clean conditions and manageable size. After that, it's a big-wave show for experts only, or a straight-up pass for the rest of us.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Wed afternoon, min 13°C on Thu morning). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Sun morning. Very mild (max 18°C on Fri night, min 10°C on Sun night). Wind will be generally light.

Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sunday
19
Monday
20
Tue
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
2
4
3
!
4
4
3
1
1
2
2
3
4
3
2
1
4
3
4
!
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SW
18
1.1
SW
17
2.1
SW
16
3
SW
14
2.5
SW
13
2.2
SW
13
2.1
SW
12
2
SW
11
1.7
SW
10
1.4
SW
10
0.8
SW
14
1.1
SW
12
1.8
SW
12
1.9
SW
12
1.8
SW
11
1.6
SW
11
2.1
SW
11
1.9
SSW
11
2.5
SW
13
3.5
SW
15
3.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
108
745
2028
3341
2108
1558
1249
897
588
380
218
341
902
1007
807
593
1027
829
2174
5920
5363
Wind (km/h)
15
NNW
15
WNW
10
SW
0
NNW
5
NNW
10
WSW
5
NE
15
E
15
E
5
NNE
10
WNW
10
WSW
20
WNW
20
W
5
SW
15
ENE
0
E
5
SSW
5
WSW
10
WNW
15
W
Wind State
off
off
cross
glassy
glassy
cross-off
cross
cross-on
cross-on
cross-off
cross-off
cross-off
off
cross-off
cross
cross-on
glassy
cross-on
cross-off
off
cross-off
High Tide
3:44AM1.61m
4:14PM1.66m
4:29AM1.59m
4:57PM1.67m
5:12AM1.52m
5:38PM1.64m
5:54AM1.43m
6:19PM1.56m
6:36AM1.32m
7:00PM1.46m
7:20AM1.21m
7:44PM1.34m
8:10AM1.10m
Low Tide
9:40PM0.12m
10:01AM0.01m
10:27PM0.10m
10:42AM0.02m
11:12PM0.12m
11:22AM0.08m
11:56PM0.18m
12:01PM0.17m
00:40AM0.26m
12:39PM0.28m
1:24AM0.36m
1:19PM0.41m
2:12AM0.46m
2:05PM0.53m
clear
clear
cloud
part cloud
part cloud
clear
part cloud
cloud
cloud
part cloud
part cloud
clear
part cloud
rain showers
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:47
7:47
7:46
7:46
7:45
7:45
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:50
5:51
5:51
5:52
5:52
5:52
5:53
5:53
 mm
2
Temp °C
14
16
18
15
15
16
14
16
18
18
18
18
16
15
15
13
12
14
12
12
14
Feels °C
10
13
15
15
15
15
14
14
15
16
16
16
15
11
12
12
11
12
11
10
10
  • 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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