Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.3° 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 2 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) - 11ft (3.5m), 14s period, WSW swell with 4,018 kJ wave energy.
  • Next surfable swell (1★+): Monday 3 Aug, 8AM (local time) - 4.5ft (1.3m), 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 Monday (Aug 03) at 8AM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.3m and 12s. The wind is predicted to be glassy 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 Thursday (Aug 06) at 2AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Aug 05) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 3rd Aug)4.5ft (1.3m) 13s
Best Surf11PM (Wed 5th Aug)10ft (3.0m) 14s
Most Powerful 2AM (Thu 6th Aug)11ft (3.5m) 14s

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


The Lowdown

Alright, folks, Rusty here. Let’s have a look at what’s been cooking for our local spot.

We’ve got a pretty solid run of surf coming up, but it’s a bit of a mixed bag with some real standouts and a few days where you might want to take the dog for a walk instead. The main event is definitely an excellent pulse of long-period SW groundswell that hits mid-week, but you’ll need to be on your game for that one.

First up, Monday morning the 3rd of August at Onrus, and it’s a beauty to kick things off. We’re looking at a clean 5ft SW swell, with a long 13-second period pushing through. The wind is glassy out of the ENE at just 3 mph, so the surface is going to be perfect. The combined energy is moderate (747). It’s a reef break, so it can be a bit inconsistent, but when it’s this clean and lined up, it’s a proper treat. You might see a few others out there, as it can get crowded sometimes, but for a Monday morning session, it’s worth the paddle.

Tuesday the 4th keeps things ticking over nicely. Morning shows a 5ft SW swell, still with a decent 11-second period, and a light cross-offshore wind from the W. It’s clean (451). The afternoon glass-off is even better with a light southerly, though the swell drops a touch to 4ft. Good, workable waves for the intermediate crew.

Now, here’s the standout. Wednesday the 5th of August. This is the one to circle on the calendar. The morning brings a solid 7ft SW groundswell, with a very long 16-second period. The energy is strong (2034). And the wind? Pure offshore from the NW at 12 mph. That’s an expert-level session right there – clean, powerful, and lined up. The afternoon is just as punchy with a 7ft swell and 15-second period, but the wind picks up to 19 mph from the WNW, still offshore. It’s going to be a bit more challenging to handle, but the wave quality will be top-tier for those who can handle it. This is for experienced surfers only.

Thursday the 6th through Sunday the 9th, the swell gets seriously big. We’re talking 10ft SW swell with energy readings in the 2000s and 3000s. The wind is mostly light and cross-shore, but the size is just too much for this break. Unless you’re absolute charging and have a big-wave board, it’s a no-go. Conditions deteriorate Sunday with strong onshore winds and rain, so that’s a hard pass.

We then hit a bit of a lull from Monday the 10th through Tuesday the 11th. The swell drops right off, and the wind is onshore or cross-onshore. Poor conditions all round. Wednesday the 12th is still messy with onshore wind, though there’s a 5ft SW swell, it’s just not clean enough to get excited about.

Another big pulse shows up on Thursday the 13th of August, with 10ft SW swell and a 15-second period. The energy is very strong (4185). But again, it’s too big for the reef and the wind is cross-onshore. For experts only, and even then, it’s a risky call.

Friday the 14th and Saturday the 15th are a bit of a mixed bag. Friday has some size but onshore wind. Saturday the 15th, however, shows some promise. The afternoon session is worth a mention – a 6ft WSW swell with a 12-second period, and it goes glassy with a light SSE wind. The combined energy is moderate (769). That’s a clean, fun wave for the weekend.

Sunday the 16th and Monday the 17th are small and mostly onshore or calm. Monday the 17th morning is glassy with a 4ft WSW swell, but it’s low energy (395). Tuesday the 18th morning sees a jump back up to 8ft WSW swell with a 13-second period and a strong NW offshore wind at 22 mph. The energy is strong (1960). That’s a powerful, clean, expert-only session, but it’s a long way out, so keep an eye on the charts.

Bottom line: The absolute best session in the whole 16-day window is Wednesday morning, 5th August at Onrus. That’s your standout. Get the 7ft SW groundswell, the 16-second period, and the offshore wind. It’s gold. The Saturday afternoon the 15th is a solid secondary option for a cleaner, smaller wave. Don’t bother with the huge days unless you’re a gun.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 22°C on Mon afternoon, min 15°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the NW by Wed afternoon).

Days 5-7 Weather Summary

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

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
2
2
2
2
2
4
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)
1.3
SW
13
1.4
SW
13
1.1
WSW
13
1.4
SW
12
1.4
SW
11
1.1
SW
11
0.7
SW
14
2
SW
16
2.1
SW
15
3.5
WSW
14
3
SW
13
3
SW
12
3
SW
14
3
SW
14
3
SW
14
3
SW
14
2.2
SW
13
3
SW
13
3
SW
13
Wave Graph
Metric surfscale
Energy kJ
609
639
402
568
439
292
206
1895
1941
4018
3145
2331
3261
3208
3438
2842
1619
2783
3242
Wind (km/h)
10
ENE
5
NE
5
S
10
NE
10
WSW
5
S
5
N
20
NW
30
WNW
20
NW
5
NE
10
SSE
15
E
10
ENE
10
WSW
10
W
25
WNW
30
WNW
20
WNW
Wind State
cross
glassy
cross-on
cross
cross-off
glassy
cross-off
off
off
off
cross
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
off
High Tide
5:47AM1.39m
6:08PM1.53m
6:26AM1.32m
6:48PM1.46m
7:13AM1.23m
7:37PM1.37m
8:16AM1.13m
8:47PM1.27m
9:48AM1.08m
10:22PM1.23m
11:33AM1.12m
11:57PM1.28m
Low Tide
11:47PM0.23m
11:49AM0.22m
00:25AM0.27m
12:25PM0.30m
1:09AM0.33m
1:10PM0.39m
2:06AM0.41m
2:11PM0.50m
3:28AM0.47m
3:45PM0.57m
5:11AM0.46m
5:37PM0.54m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
rain showers
rain showers
clear
clear
clear
clear
part cloud
cloud
part cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:35
7:33
7:33
7:31
7:31
7:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:02
6:04
6:05
6:06
6:06
6:07
 mm
5
4
2
Temp °C
17
20
22
19
18
19
16
18
18
15
12
13
13
13
17
13
14
16
14
Feels °C
17
18
20
17
16
18
16
14
11
10
11
11
10
11
16
12
9
10
9
  • 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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