Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.8° C
0.7° 

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


Onrus surf forecast from 11 Aug 2026:

  • Best quality surf: Tuesday 18 Aug, 8AM (local time) - 10ft (3.0m), 12s period, SW swell with offshore winds.
  • Most powerful swell: Thursday 13 Aug, 11AM (local time) - 7ft (2.1m), 17s period, SW swell with 2,719 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 11AM (local time) - 7ft (2.1m), 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 Thursday (Aug 13) at 11AM. The primary swell is predicted to be 2.1m and 17s 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 2.1m 17s and forecast to arrive on Thursday (Aug 13) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 8s period and expected on Wednesday (Aug 12) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Thu 13th Aug)7ft (2.1m) 17s
Best Surf 8AM (Tue 18th Aug)10ft (3.0m) 12s
Most Powerful11AM (Thu 13th Aug)7ft (2.1m) 17s

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


The Lowdown

G'day, 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, but some real gems are lining up if you're patient.

The water temperature is sitting at 59°F which is a touch cooler than usual for this time of year, but nothing too wild.

The first few days, Tuesday and Wednesday, are a write-off. Strong cross-onshore winds and messy conditions mean the surf is poor, and we're looking at a couple of days where you're better off staying home.

Thursday the 13th morning is where it starts to get interesting. Onrus is a reef break that's inconsistent, but when it's on, it's on. We've got a clean 7ft SSW swell with a period of 17 seconds – that's a proper long-period groundswell, packing a lot of energy (2719). The wind is a gentle cross-offshore, so the waves will be clean and well-shaped. This is excellent for experienced surfers, with a solid, powerful swell. For a reef break, that long period should wrap in nicely.

Friday the 14th morning is a real standout. The wind goes glassy, dead calm, with a 5ft WSW swell and a 15-second period. The combined energy is moderate (1030), but the conditions will be perfect. That's a great morning for a more relaxed session, though the swell is a bit smaller than Thursday.

Saturday the 15th and Sunday the 16th are a step down – light cross-onshore winds and smaller swell keep things marginal, though Sunday morning does have a clean 5ft swell with a cross-offshore breeze.

Monday the 17th is another cracker. Clean conditions again, with a 7ft WSW swell and a 13-second period, and the energy is moderate (1643). This is excellent for experienced surfers, and the consistent wind will keep the waves lined up.

Tuesday the 18th morning, the swell jumps to 10ft from the SW, and while the wind is clean, that's too big for Onrus, even for experts. The afternoon eases to 8ft, which is still on the bigger side.

The following week, from the 19th to the 26th, the surf is more marginal. There are a few clean moments, like the 21st morning with a 6ft SW swell and cross-offshore wind, and the 24th morning with glassy conditions and a 5ft SSW swell. But overall, the consistency drops, and the wind is often cross-onshore. The standout for the second week is the 21st morning – it's a nice, clean session, but nothing like the punch of the first week.

The best of the best for the whole outlook is Thursday the 13th morning. The combination of a big, long-period swell, clean conditions, and a reef break setup makes for a serious session. If you can only get out once, that's your window.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Thu afternoon, min 9°C on Tue night). Winds decreasing (strong winds from the E on Tue afternoon, calm by Thu afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Fri afternoon, min 13°C on Sat morning). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
1
1
2
4
2
4
4
3
4
2
2
3
3
3
3
4
4
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
SSW
12
1.6
SSW
12
1.3
SW
22
1.6
SW
19
1.7
SW
18
1.9
SW
16
2.1
SW
17
2
SW
16
1.7
SW
16
1.5
WSW
15
1.5
WSW
15
1.6
WSW
14
1.6
WSW
13
1.5
WSW
13
1.4
WSW
14
1.5
WSW
14
1.8
WSW
14
2.3
WSW
13
2.2
WSW
13
1.9
WSW
13
1.6
WSW
12
Wave Graph
Metric surfscale
Energy kJ
1102
705
1641
1798
1741
1899
2719
2058
1412
987
974
876
863
793
743
892
1230
1848
1643
1188
715
Wind (km/h)
35
E
40
E
30
E
30
ENE
20
ENE
20
ENE
15
NE
10
ESE
10
NNE
5
WNW
10
W
10
NW
5
E
5
SSW
10
W
10
W
5
SSW
10
NE
10
W
10
WSW
10
NW
Wind State
cross-on
cross-on
cross-on
cross
cross-on
cross
cross-off
cross-on
cross-off
glassy
cross-off
off
cross-on
cross-on
cross-off
cross-off
cross
cross
cross-off
cross-off
off
High Tide
2:34PM1.55m
2:49AM1.57m
3:16PM1.67m
3:31AM1.61m
3:54PM1.73m
4:09AM1.60m
4:31PM1.74m
4:46AM1.55m
5:06PM1.69m
5:21AM1.47m
5:39PM1.60m
5:55AM1.37m
6:12PM1.47m
Low Tide
8:23AM0.12m
8:47PM0.15m
9:04AM0.04m
9:30PM0.07m
9:42AM-0.00m
10:10PM0.04m
10:18AM0.00m
10:47PM0.05m
10:52AM0.06m
11:23PM0.12m
11:25AM0.15m
11:57PM0.21m
11:56AM0.26m
00:31AM0.33m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:26
7:26
7:24
7:24
7:22
7:22
7:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:08
6:09
6:10
6:10
6:12
6:13
6:13
 mm
Temp °C
14
16
13
14
19
15
20
25
22
21
22
17
16
19
15
16
18
14
17
18
15
Feels °C
7
8
5
8
15
10
17
23
20
18
18
15
15
17
15
14
17
13
15
15
14
  • 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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