Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 06 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.2° 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 6 Aug 2026:

  • Best quality surf: Thursday 6 Aug, 11PM (local time) - 10ft (3.0m), 13s period, SW swell with cross-onshore winds.
  • Most powerful swell: Saturday 8 Aug, 5PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,308 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 11PM (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 11PM. The primary swell is predicted to be 3.0m and 13s period. The wind is predicted to be cross-onshore 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 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Wednesday (Aug 12) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 6th Aug)10ft (3.0m) 13s
Best Surf11PM (Thu 6th Aug)10ft (3.0m) 13s
Most Powerful 5PM (Sat 8th Aug)11ft (3.5m) 14s

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


The Lowdown

Alright, folks, let's get into it. Rusty here, and I'm looking at our local spot, Onrus, for the next couple of weeks. We've got a bit of a mixed bag ahead, but there are some proper sessions to be had if you're willing to wait for the right moment.

The water's sitting at 59°, which is about average for this time of year, so nothing too wild there.

Right, the first few days are a write-off for most. Thursday the 6th and Friday the 7th are pumping with a big 10-foot SW swell – the energy is massive (2683 to 4234). But honestly, for Onrus, that's just too much. It's going to be a washing machine, and only for the absolute nutters. Skip it. Saturday the 8th morning sees the swell drop to 8-foot SW, and with a clean offshore breeze, it's on for experienced surfers only. The energy is still hefty (2126). If you're a charger, that's your window Saturday morning.

Then we hit a real rough patch. From Sunday the 9th right through to Wednesday the 12th, it's mostly onshore, lumpy, and just plain ugly. Swell drops off, but the wind is a mess. A few days of nothing good.

Now, here's where it gets interesting. Thursday the 13th is the standout. Morning session with a 8-foot SW groundswell, period a long 17 seconds, and a cross-offshore breeze. The energy is solid (3139). Then, Thursday afternoon gets even better – the wind goes glassy. That's a 5 km/h WSW glass-off, with a 7-foot SW swell (2514). That is the session of the forecast period. Clean, powerful lines from a long-period SW groundswell. Onrus is a reef, so that long period will wrap in nicely. Get on it.

Friday the 14th and Saturday the 15th are still good, with 6-foot to 6-foot WSW swell and clean winds, but the energy drops a bit (around 1000-1261). Fun, but not the highlight. Sunday the 16th stays clean with consistent 6-foot WSW swell.

Hold up, there's a second pulse on Monday the 17th. We get a 10-foot SW swell rolling in (3013 energy), but again, that's too big for this break for most of us. The morning has clean offshore wind, but it's expert-only territory again.

After that, the end of the run from Tuesday the 18th through to the 21st is messy with onshore winds and smaller, weaker swells. The last day, Friday the 21st, has a tiny 4-foot SE swell and glassy conditions, but the period is a short 6 seconds, so it's not worth paddling out for.

So, to sum it up: the absolute best is Thursday the 13th, with that glassy afternoon session. Saturday the 8th morning is the call for the brave. Everything else is a gamble or a skip.

Rusty, out.

Short Range Forecast

Light rain (total 9mm), mostly falling on Sat night. Very mild (max 17°C on Sat afternoon, min 10°C on Thu night). Winds increasing (calm on Fri afternoon, fresh winds from the S by Sun morning).

Days 5-7 Weather Summary

Some drizzle, heaviest during Sun afternoon. Very mild (max 19°C on Wed morning, min 10°C on Tue morning). Winds decreasing (fresh winds from the E on Tue morning, light winds from the ENE by Wed morning).

Thu
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
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
!
1
0
0
0
0
2
3
3
3
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
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
SSW
12
3.5
SSW
12
3
SSW
12
1.6
SW
11
1.9
S
10
2.2
SSW
13
1.8
SSW
12
1.3
SSW
11
1.5
SW
22
1.9
SW
18
1.8
SW
17
1.9
SW
16
Wave Graph
Metric surfscale
Energy kJ
2683
2884
3586
4234
3119
2126
4308
3567
3750
3210
2150
645
673
1654
872
423
2003
2345
2018
1899
Wind (km/h)
15
SE
20
E
15
ENE
10
WSW
15
W
20
WNW
20
SW
20
S
35
S
30
SSE
15
ESE
20
ESE
30
ESE
25
E
35
E
30
E
20
ENE
10
NE
10
ESE
10
NE
Wind State
on
cross-on
cross
cross-off
cross-off
off
cross
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
on
cross
High Tide
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
cloud
rain showers
clear
clear
clear
part cloud
light rain
rain showers
rain showers
rain showers
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
1
1
4
3
1
Temp °C
13
12
12
16
13
14
17
12
13
12
11
12
14
12
13
16
13
19
22
20
Feels °C
10
8
9
16
11
10
13
8
5
4
5
7
6
5
6
9
8
16
19
17
  • 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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