Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.9°C
0.8° 

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


Onrus surf forecast from 30 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 2PM (local time) - 10ft (3.0m), 13s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 2AM (local time) - 10ft (3.0m), 14s period, SW swell with 3,783 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 11AM (local time) - 6ft (1.8m), 11s 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 31) at 11AM. The primary swell is predicted to be 1.8m and 11s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.0m 14s and forecast to arrive on Wednesday (Sep 02) 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 0.8m 8s period and expected on Friday (Sep 04) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Mon 31st Aug)6ft (1.8m) 11s
Best Surf 2PM (Tue 1st Sep)10ft (3.0m) 13s
Most Powerful 2AM (Wed 2nd Sep)10ft (3.0m) 14s

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


The Lowdown

Alright, let's get into it.

First up, we've got a bit of a mixed bag on the cards for the next couple of weeks. The ocean's not entirely flat, but it's going to take some patience to find the good ones. The first couple of days are okay, but the real standout window is shaping up for Tuesday and Wednesday. We've got a solid SW groundswell pushing in, with moderate to strong energy (1761 on Sunday morning, building to 2248 by Tuesday morning), and the winds are looking favorable. This is the time to be in the water.

Sunday, August 30th: Morning is your better bet. We've got a clean 7.9ft SW swell with a 12-second period, but the wind is a bit on it from the SE at 10 km/h. The wave energy is moderate, but the forecast is marginal. It's not a write-off, but it's not a hero wave either. The afternoon sees the wind pick up from the SSE to 20 km/h, making things messier. This is a 'maybe get a few if you're keen' kind of day.

Monday, August 31st: The morning glass-off is the winner here. Light SSE wind at 5 km/h, almost nothing, and a clean 5.9ft SW swell. The energy drops a bit, but the conditions are much cleaner. This is your classic morning session before work. The afternoon brings a light cross-onshore breeze, which will put a bit of texture on the face but could still be fun. Don't sleep on the early one.

Tuesday, September 1st: This is our first big standout. The morning is looking excellent for experienced surfers. We have an 8.2ft SW swell with a 13-second period, and a light WSW cross-offshore wind. The energy is strong (2248) and the waves are going to have some push. This is a proper reef-break day. The afternoon gets even bigger, up to 9.8ft, but that's pushing into 'too big' territory for a lot of folks. It's powerful, and it's going to be a handful. If you're an expert, it could be a blast, but this is not the day for beginners.

Wednesday, September 2nd: The swell is still very much in the water, but the wind has shifted to a cross-on from the ESE at 10 km/h. It's still big, around 9.8ft, and the energy is strong (2887). The quality will be down a touch from Tuesday, but there are still waves to be had if you're comfortable in heavier surf. The afternoon gets windier and choppier, so the window is the morning.

Thursday, September 3rd: We get a bit of a breather. The swell drops to 5.6ft in the morning and we have a glassy SSW wind at 5 km/h. This is another excellent, clean morning session. The period is a long 13 seconds, so there's some great shape. However, the afternoon turns ugly with a strong 40 km/h SE wind and a short-period swell. That's a hard no for the afternoon.

Friday, September 4th to Sunday, September 6th: This is the dead zone. A strong ESE wind blows for most of this stretch, making a mess of any swell that's left. The swell size drops off, and the conditions are poor. It's not worth paddling out, honestly. You're better off doing something else. This gap runs for a few days, from Friday morning through to Sunday afternoon. The winds are strong and onshore, and the waves are going to be chopped up.

Monday, September 7th: The wind finally eases. We get a glassy morning with a small 2.6ft WSW swell. It's not big, but it's clean. The energy is still weak (329), so it's a grovel session, but a fun, clean one if you're desperate.

Tuesday, September 8th: The wind is back on it from the E and ESE, making things choppy again. The swell is around 4.3ft, but the quality is poor. Skip it.

Wednesday, September 9th: This is a hidden gem. The wind drops to nothing, completely glassy. We have a small 3.9ft WSW swell with a 12-second

Short Range Forecast

Mostly dry. Very mild (max 15°C on Sun afternoon, min 9°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Thu morning. Very mild (max 18°C on Wed afternoon, min 12°C on Wed morning). Mainly strong winds.

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
3
3
2
4
4
!
!
!
1
4
4
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)
2.4
SW
12
2.3
SW
12
2.1
SW
12
1.8
SW
11
1.9
SW
11
2.3
SW
11
2.5
SW
13
3
SW
13
3
SW
14
3
SW
14
2.5
SW
13
2.1
WSW
13
1.7
WSW
13
1.5
WSW
12
1.3
WSW
12
1.3
WSW
12
1.4
WSW
11
1.6
SW
11
1.1
WSW
10
1
SSW
14
1.9
SW
14
Wave Graph
Metric surfscale
Energy kJ
1739
1472
1162
828
821
1259
2248
3066
3783
2887
2275
1452
900
659
421
429
458
584
260
407
1500
Wind (km/h)
10
SE
20
SSE
10
ENE
5
S
10
SSW
5
N
10
WSW
15
SW
10
NNE
10
ESE
20
SSE
10
NNW
5
SSW
40
SE
45
SE
40
ESE
40
ESE
35
E
35
E
40
E
30
E
Wind State
on
on
cross
glassy
cross-on
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross-off
glassy
on
on
cross-on
on
cross-on
cross-on
cross-on
cross-on
High Tide
4:32PM1.68m
4:48AM1.52m
5:04PM1.65m
5:22AM1.46m
5:38PM1.57m
6:00AM1.36m
6:18PM1.46m
6:47AM1.24m
7:09PM1.32m
7:53AM1.12m
8:28PM1.19m
9:44AM1.06m
10:28PM1.15m
Low Tide
10:19AM0.07m
10:46PM0.09m
10:49AM0.11m
11:19PM0.13m
11:22AM0.18m
11:55PM0.20m
11:59AM0.29m
00:39AM0.31m
12:45PM0.42m
1:37AM0.44m
1:53PM0.55m
3:13AM0.54m
3:56PM0.62m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
mod rain
light rain
rain showers
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:03
7:01
7:01
7:00
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:22
6:22
6:23
6:24
6:24
6:25
6:27
 mm
6
3
1
Temp °C
14
15
12
12
13
11
14
15
13
16
18
15
13
15
15
16
17
13
17
19
15
Feels °C
10
11
8
10
11
10
12
13
12
14
14
12
12
8
8
8
9
7
10
11
8
  • 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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