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, 5AM (local time) - 4ft (1.2m), 15s 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 5AM. The primary swell is predicted to be 1.2m and 15s period with a secondary swell of 0.7m and 10s. Another secondary swell of 0.7m and 10s is also forecast. 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+) 5AM (Wed 5th Aug)4ft (1.2m) 15s
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, listen up. It’s Rusty here, looking at the next stretch for Onrus. This is a reef set-up that needs a solid SW groundswell to get going, and we’ve got a decent window of that coming up. It’s inconsistent by nature, so you gotta pick your moments, but when it lines up, it’s got that classic reef power.

The week kicks off proper on Wednesday the 5th. We’re looking at a solid 7ft SW groundswell with a long 16-second period. That’s real energy pushing in, and the combined energy is a solid 1986. The NW wind is offshore, keeping things clean. This is top-tier stuff for experienced surfers, so if you’ve got the skills, this is your morning. The afternoon bumps up slightly to 7ft, but the wind swings NW at 22 mph, making it fresh and a bit more of a handful.

Now, hold on. Thursday the 6th and Friday the 7th, the swell jumps to a solid 10ft. The data is clear: that’s just too big for this break. It’s going to be a washing machine. We need to let that pulse settle.

Saturday the 8th is where it gets interesting again. The morning has a 8ft SW swell with a 13-second period and a light W cross-offshore wind. Surf is clean and firing, another one for the experienced crew. The afternoon, the swell pushes back to 10ft, which is again getting too unruly for a good time here.

Sunday the 9th is a complete write-off. We’ve got a 12ft to 13ft swell with strong S/SSE cross-onshore winds at 25 mph. That's stormy, messy, and dangerous. The combined energy is screaming at 7019. Don’t even bother looking at the ocean; it’s for kites, not paddles.

The start of the next week, Monday the 10th and Tuesday the 11th, is more of the same bad news. Big, wind-blown slop with onshore and cross-onshore winds. The energy drops but the quality is gone. We need to wait this out.

Things start to settle down from Wednesday the 12th through Friday the 14th. The swell backs off to the 5ft to 6ft range, but the period is still long, 15-18 seconds. It’s marginal and a bit inconsistent, but we get a few windows of lighter winds. Then, on Friday the 14th, it’s magic. The wind goes glassy, and we’ve got a clean 5ft WSW groundswell with a 13-second period. It’s small, but it will be perfect, glassy reef surf. This is the call for the longboard or a big fish.

Saturday the 15th and Sunday the 16th are similar, small and clean in the mornings with the glassy conditions, but the swell is fading a bit. It’s not big, but it’s rideable and fun.

Here’s where things get real. On Monday the 17th, we see a new SW pulse at 7ft with a 14-second period. The wind is light, cross-offshore, and the surf is clean. This is another standout day, back to that proper reef power, but for experienced surfers only. Tuesday the 18th backs off a touch to a clean 5ft.

The last few days of the window on the 19th and 20th are a mixed bag. There’s some size, but the wind and energy aren’t consistent. The morning of the 19th has strong offshore winds, which can make it hard to get into.

So, the standouts? It’s a toss-up between the clean 7ft on Wednesday morning the 5th and that glassy 5ft on Friday the 14th. The 5th has the size and power; the 14th has the perfect, clean conditions. Both are worth calling in sick for.

Stay safe out there.

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:
  • 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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