Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 16 Sep 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.5°C
1.2° 

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


Onrus surf forecast from 16 Sep 2026:

  • Most powerful swell: Wednesday 16 Sep, 11PM (local time) - 8ft (2.5m), 13s period, SSW swell with 2,499 kJ wave energy.

Best Forecast Surf Conditions for Onrus this week:

The most powerful waves expected at Onrus in the next 16 days are 2.5m 13s and forecast to arrive on Wednesday (Sep 16) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Tuesday (Sep 22) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Wed 16th Sep)8ft (2.5m) 13s

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


The Lowdown

Alright, let’s get into it. This is Onrus we’re talking about, and to be honest, the next week and a half is going to be a constant fight with the onshore breeze. The first run, from Wednesday the 16th through to the 21st, is going to be messy. We’ve got a solid southeast wind, 25 to 35 km/h, blowing straight on or cross-on shore for most of it. That’s going to tear up the 1.3m to 2.4m of swell that we have. It’s going to be lumpy, choppy, and pretty uninviting. The energy in the water is there, but it just won't be clean. The water temp is around 58° F, which is a bit chilly for this time of year, so a good 4/3 is a must.

The middle part sees a bit of a dip in size on the 22nd, but it’s still just cross-on with light winds. Not worth the paddle for the 0.9m – 1.0m slop on offer.

The big moment, and honestly the only time this whole forecast looks like it’s going to work, is on Wednesday the 24th and Thursday the 25th. The wind finally switches to the west, a proper cross-off for Onrus, and the swell is huge – we’re looking at a solid 8 to 11 feet on the face. The period is long, 14 to 15 seconds, and the energy is off the charts. But here’s the thing: it’s too big. This break just can’t handle that much water. It's going to be a clean, powerful mess. The forecast literally says the swell is too big, so while it looks incredible from the shore, only the most experienced paddlers would even consider it. The wave height is over the 2.5m mark, firmly in the "experts only" territory.

By the 28th things start to settle down. We get a smaller, cleaner day with 1.5m – 1.8m waves and light winds. That’s your best bet for actually getting some clean ones in, a bit of relief after all that wind and before the ocean decides to take a breather.

So, bottom line: it’s a long wait for the surf to get good. The big 24th and 25th will be a spectacle, but it’s a no-go unless you're in the top tier. The 28th looks like the pick of the rest, but you’ll need to be on it early.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Wed morning. Very mild (max 17°C on Fri morning, min 12°C on Wed night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Sat night. Warm (max 22°C on Mon afternoon, min 15°C on Sat morning). Mainly fresh winds.

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
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
13
2.5
SSW
13
2.4
SSW
12
2.1
SW
12
1.8
SW
11
1.7
SW
11
1.7
SW
13
1.6
SW
12
1.3
SW
12
1.1
SW
12
2.1
SW
14
1.9
SW
13
1.7
WSW
13
1.5
WSW
12
1.3
WSW
12
1.2
SW
12
1
SW
11
0.9
SW
13
1
SW
12
1.1
SW
10
Wave Graph
Metric surfscale
Energy kJ
1706
1756
2329
1580
1149
866
696
940
773
494
355
1527
1164
904
702
480
407
242
245
268
277
Wind (km/h)
25
SE
35
SE
30
ESE
30
SE
35
SE
20
ESE
35
E
35
ESE
30
ESE
35
ESE
30
ESE
30
ESE
25
ESE
20
SE
15
ESE
20
E
30
ESE
20
E
10
E
5
SSE
15
ESE
Wind State
on
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
5:59PM1.31m
6:20AM1.17m
6:32PM1.17m
7:03AM1.04m
7:21PM1.04m
8:35AM0.94m
9:27PM0.96m
11:23AM0.98m
11:40PM1.02m
12:29PM1.10m
00:36AM1.13m
1:05PM1.24m
1:13AM1.25m
Low Tide
11:46AM0.40m
00:13AM0.43m
12:16PM0.52m
00:49AM0.55m
12:56PM0.65m
1:53AM0.67m
2:37PM0.76m
4:44AM0.69m
5:48PM0.72m
6:14AM0.59m
6:45PM0.59m
6:54AM0.47m
7:19PM0.46m
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
rain showers
light rain
rain showers
clear
part cloud
clear
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:39
6:37
6:35
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:35
6:35
6:36
6:37
6:37
6:37
6:38
 mm
1
1
1
1
1
Temp °C
15
15
13
16
16
13
17
17
15
17
18
16
16
16
16
20
22
17
22
24
22
Feels °C
9
8
7
8
8
7
9
9
9
11
12
11
12
13
13
17
19
14
22
23
23
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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