Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 06 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.4° 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 6 Aug 2026:

  • Best quality surf: Thursday 6 Aug, 8AM (local time) - 10ft (3.0m), 13s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 8 Aug, 8PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,292 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 8AM (local time) - 10ft (3.0m), 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 Thursday (Aug 06) at 8AM. The primary swell is predicted to be 3.0m and 13s period. The wind is predicted to be cross-offshore 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 Saturday (Aug 08) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 7s period and expected on Tuesday (Aug 11) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Thu 6th Aug)10ft (3.0m) 13s
Best Surf 8AM (Thu 6th Aug)10ft (3.0m) 13s
Most Powerful 8PM (Sat 8th Aug)11ft (3.5m) 14s

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


The Lowdown

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

The first bit of the forecast is a bit of a wait, with nothing worth paddling out for until Saturday, the 8th of August. The swell is just too big and messy for this spot before then, especially with that 10ft SW pulse hitting a reef break that's inconsistent. It's a real shame, because Thursday morning the 6th is glassy, but the ocean is just too amped up for a safe session.

The standout window is definitely Saturday morning, the 8th of August. Onrus is a reef break that's exposed to the SW, and we've got a solid 8ft SW groundswell. The wind is offshore from the WNW at 12 mph, making for clean, peeling waves. The combined wave energy is pumping hard at 2126 (moderate to strong energy), and with a 13-second period, this is proper groundswell. It's a setup for experienced surfers only, as it's too big for beginners. The water temp is sitting at 60°, which is pretty much normal for this time of year, so no nasty surprises. Expect crowds here sometimes, so get out early for your pick of the sets.

The following Wednesday morning, the 12th of August, is another cracker. We've got a 6ft SW groundswell with a very long 19-second period. That's proper energy rolling in, with a combined energy of 2304 (moderate to strong). The wind is a light cross-offshore from the NNE at 6 mph, keeping the face clean. Again, this is for experienced surfers. That long period will make the waves stand up nicely on the reef, offering some long, drawn-out walls.

A bit later, on Thursday afternoon the 13th of August, we get a glassy session. The swell has dropped to 6ft from the SW, with a 16-second period and a combined energy of 1783 (moderate to strong). The wind is glassy from the SE at 3 mph. With the sun out, it’ll be a beautiful, clean afternoon. The waves will have plenty of push, so it's still a spot for the more experienced crew.

For the second week, things get a bit more up and down, but Saturday morning the 15th of August is looking promising. A 6ft WSW groundswell with a 16-second period and a clean offshore wind from the NW at 6 mph. The energy is still there at 1629 (moderate to strong). It’s a solid, clean option.

We also have a big, clean swell coming in on Monday morning the 17th of August, with a 10ft WSW groundswell. That's a beast, and will be for experts only. The wind is cross-offshore and light, so it'll be clean, but you need to be on your game. The combined energy is a massive 3440 (strong to very strong), so you'll feel the power.

The forecast gets a bit wild towards the end, with a strong offshore wind on Thursday the 20th of August. While the conditions will be clean, the wind is going to be a serious factor, making paddling extremely difficult. It's a session for the die-hards only.

To wrap it up, the best bets are the Saturday morning of the 8th, and the Wednesday morning of the 12th of August. Get after it.

Rusty.

Short Range Forecast

Moderate rain (total 14mm), heaviest on Thu morning. Very mild (max 17°C on Sat afternoon, min 9°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Sun morning. Very mild (max 16°C on Tue afternoon, min 10°C on Mon night). Winds decreasing (fresh winds from the SSE on Sun morning, light winds from the ESE by Sun night).

Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
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
0
!
0
0
!
0
0
0
0
0
2
4
3
5
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
SW
13
3
SW
12
3
SW
13
3
SW
14
3
SW
15
3
SW
14
2.5
SW
13
3.5
SW
14
3.5
SW
13
3.5
SW
12
3.5
SW
12
3
SSW
12
2.3
S
9
2.5
S
10
2.5
SSW
13
2
SSW
12
1.9
S
11
1.3
SW
22
1.7
SW
19
1.7
SW
18
1.8
SW
16
Wave Graph
Metric surfscale
Energy kJ
3029
2943
2840
3419
4046
3119
2126
4247
3883
3634
3233
2514
904
1299
2103
1054
859
1656
1988
1741
1651
Wind (km/h)
5
SSE
20
SSE
15
E
20
ENE
10
WSW
15
W
20
WNW
20
S
15
SSE
35
SSE
30
SSE
20
SE
20
ESE
30
ESE
25
E
35
ENE
25
E
20
ENE
10
NNE
5
ESE
10
NNE
Wind State
glassy
on
cross-on
cross
cross-off
cross-off
off
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-on
cross-off
High Tide
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
3:16PM1.67m
3:31AM1.61m
Low Tide
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
9:04AM0.04m
9:30PM0.07m
light rain
light rain
rain showers
clear
clear
clear
part cloud
rain showers
rain showers
rain showers
light rain
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:31
7:31
7:30
7:28
7:28
7:26
7:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:06
6:07
6:07
6:07
6:08
6:09
 mm
5
2
1
1
5
3
1
Temp °C
12
12
12
12
16
12
14
17
13
12
12
12
13
13
12
12
16
12
18
21
19
Feels °C
11
9
8
8
16
10
10
13
10
4
4
5
8
6
6
5
11
7
15
19
16
  • 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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