Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.7° C
0.2° 

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


Onrus surf forecast from 5 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 11PM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
  • Most powerful swell: Thursday 6 Aug, 2AM (local time) - 13ft (4.0m), 13s period, WSW swell with 5,704 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 11AM (local time) - 6.5ft (2.0m), 16s 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 (Aug 05) at 11AM. The primary swell is predicted to be 2.0m and 16s period with a secondary swell of 0.9m 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 4.0m 13s 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 1.8m 7s period and expected on Monday (Aug 10) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Wed 5th Aug)6.5ft (2.0m) 16s
Best Surf11PM (Wed 5th Aug)10ft (3.0m) 14s
Most Powerful 2AM (Thu 6th Aug)13ft (4.0m) 13s

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


The Lowdown

Alright, surfers, Rusty here. Let’s have a look at what’s on the table for the next couple of weeks.

We’ve got a bit of a mixed bag coming our way. The first few days are a proper tease, with some solid swell but tricky conditions for the most part. The real standout window shapes up from Saturday the 8th through Monday the 10th, with another brief, promising pulse right around the middle of the second week.

Onrus is the only break on the radar, and it’s a reef setup that takes a solid SW swell. The water is sitting at 60°F, which is pretty much bang on average for this time of year, so no need to dig out the 5/4 just yet.

The action kicks off on Wednesday morning, the 5th. It’s a chilly 7ft SW groundswell with a long 16-second period, and we’ve got a moderate NW offshore breeze keeping things clean. The swell energy is sitting at 2015, a solid, powerful push. This is a wave for the confident intermediate or above, because it’s got some grunt and the long period means it’ll stand up nicely on the reef. The afternoon sees the wind freshen up to 22 mph from the NW, still offshore, but it’ll get a bit bumped up. The swell ticks up to 7ft, but the energy jumps to 2170.

Thursday, the 6th, is a write-off. The swell jumps to 10ft, which is just too much for this break, and we’ve got an onshore wind from the ESE to deal with. Friday, the 7th, stays too big at 10ft, and the wind swings around to a cross-on, making it a messy, choppy affair.

Now, Saturday the 8th is where it gets interesting. The swell drops back to a much more manageable 8ft in the morning, still a solid SW pulse. The real magic is the wind: a light 6 mph WSW cross-off, giving us clean, lined-up walls. The combined energy is still a meaty 2005. This is your best bet for the early part of the week. The afternoon sees the swell climb back to 10ft with a 14-second period, and while the wind stays cross-off, it’s a bit bigger, so the morning session is the pick.

Sunday the 9th and Monday the 10th are a complete loss. The wind howls from the SE at 25 mph, turning the ocean into a frothy mess. The swell is still there, but forget about a clean ride. This pattern of strong onshore winds continues through to the 13th, with the swell dropping to 4ft to 6ft, but the wind is persistent from the E and SE, keeping it lumpy and choppy.

We get a reprieve on Saturday the 15th. The swell is small, only 4ft from the WSW, but the wind is absolute perfection: glassy. A slight air from the north in the morning, then a touch of glassy ENE in the afternoon. The energy is low at 526, so it’s a small-wave board day, but the conditions will be as clean as a whistle. This is a standout for the pure fun of it.

Sunday the 16th stays clean with a light cross-off wind, but the swell is dropping to 3ft, so it’s getting small. Then on Monday the 17th, we get a fresh pulse. A 5ft WSW swell, the wind is a moderate 16 mph offshore from the NW, and the energy is back up to 572. The period is a shorter 9 seconds, so it’ll be a bit more fun, punchy wave. The afternoon gets a bit windy, but the morning is a clear winner.

After that, things go sideways again. From Tuesday the 18th onwards, the swell gets massive again, pushing 10ft to 16ft, with onshore and cross-on winds. That’s just too big for Onrus, and it’ll be a washing machine out there. The end of the forecast window on the 20th is a monster 16ft SW swell with 19 mph cross-on winds – that’s a full-on warning, not a surf forecast.

So, to wrap it up: your top picks are the Saturday morning session on the 8th for a solid, clean swell, and the glassy, small-wave fun on the 15th. The Monday morning of the 17th is also worth a look for a punchy little session. The second week has some promise, but it’s a bit further out, so keep an eye on the charts.

Rusty.

Short Range Forecast

Moderate rain (total 14mm), heaviest on Wed night. Very mild (max 19°C on Wed afternoon, min 10°C on Thu night). Winds decreasing (fresh winds from the NW on Wed afternoon, calm by Fri night).

Days 4-6 Weather Summary

Heavy rain (total 35mm), heaviest during Sat night. Very mild (max 14°C on Sat afternoon, min 10°C on Sat night). Winds increasing (light winds from the SW on Sat morning, strong winds from the SSE by Sun morning).

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
!
!
!
!
!
!
!
4
!
0
0
0
0
0
0
0
0
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)
2
SW
16
2.1
SW
15
4
WSW
13
3
SW
13
3
SW
12
3
SW
13
3
SW
14
3
SW
15
3
SW
14
2.4
SW
13
3
SW
14
3.5
SW
13
3
SW
13
3
SW
12
3
SSE
9
2
S
10
2.1
S
10
1.7
S
10
1.7
S
12
1.3
SSW
11
1.3
SW
21
Wave Graph
Metric surfscale
Energy kJ
1871
1915
5704
3384
2825
2796
3586
4292
3325
2005
3031
4581
3153
2327
1263
724
861
592
841
408
1348
Wind (km/h)
15
NW
35
NW
25
W
10
ESE
15
SE
15
E
20
E
10
SE
5
NE
10
WSW
15
WNW
25
S
45
SSE
40
SSE
30
SE
35
SE
35
ESE
30
E
35
E
35
E
25
ENE
Wind State
off
off
cross-off
on
on
cross-on
cross-on
on
glassy
cross-off
cross-off
cross-on
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
High Tide
7:37PM1.37m
8:16AM1.13m
8:47PM1.27m
9:48AM1.08m
10:22PM1.23m
11:33AM1.12m
11:57PM1.28m
12:51PM1.25m
1:08AM1.39m
1:47PM1.41m
2:02AM1.50m
2:34PM1.55m
2:49AM1.57m
Low Tide
1:10PM0.39m
2:06AM0.41m
2:11PM0.50m
3:28AM0.47m
3:45PM0.57m
5:11AM0.46m
5:37PM0.54m
6:35AM0.36m
6:59PM0.41m
7:35AM0.23m
7:58PM0.27m
8:23AM0.12m
8:47PM0.15m
clear
clear
rain showers
light rain
light rain
rain showers
part cloud
clear
clear
clear
part cloud
heavy rain
heavy rain
light rain
rain showers
rain showers
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:33
7:31
7:31
7:30
7:28
7:28
7:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:05
6:06
6:06
6:07
6:07
6:07
6:08
 mm
8
3
2
1
17
12
2
3
1
Temp °C
17
19
15
13
12
11
12
17
14
13
14
14
11
12
11
12
13
12
13
15
11
Feels °C
13
13
9
11
9
7
8
16
13
11
11
12
1
2
3
3
4
4
6
7
3
  • 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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