Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 16 Sep 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
13.9°C
1.8° 

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:

  • Best quality surf: Wednesday 23 Sep, 11AM (local time) - 7.5ft (2.3m), 11s period, SW swell with glassy winds.
  • Most powerful swell: Wednesday 16 Sep, 8PM (local time) - 8ft (2.5m), 13s period, SW swell with 2,318 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 22 Sep, 11AM (local time) - 4ft (1.2m), 11s period with W 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 Tuesday (Sep 22) at 11AM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 1.0m and 13s. Another secondary swell of 0.3m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.

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 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Sep 22) at 2PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Tue 22nd Sep)4ft (1.2m) 11s
Best Surf11AM (Wed 23rd Sep)7.5ft (2.3m) 11s
Most Powerful 8PM (Wed 16th Sep)8ft (2.5m) 13s

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


The Lowdown

Alright, Rusty here. Let's have a look at what we've got on the cards for Onrus. It’s a reef setup that loves a good SW swell, and we’ve got some solid pulses heading our way, but we have to be patient. The first week looks like a write-off, so don't bother waxing up just yet.

Right off the bat, the first few days are a total mess. Wednesday the 16th through to Saturday the 20th is a grim run of onshore and cross-onshore winds from the SE and E, blowing right into the face of the swell. The water temp is sitting at 57° which is a bit colder than normal for this time of year, and that’s about as welcoming as it gets. The waves are in the 4 ft to 8 ft range, but it’s all poor quality surf. The energy is moderate to strong (2311 on Wednesday morning), but with those winds, it’s going to be a lumpy, choppy, blown-out mess. Forget about it for a paddle; if you’ve got a kite, this might be your playground, but not for a surfboard.

We finally get a break in the weather on Tuesday the 22nd. The morning is looking primo with 4 ft of W swell, glassy conditions, and hardly any wind at 5 km/h. The energy is moderate (665). Finally, something you can actually surf. It won’t be bombing, but it’s clean and rideable.

Now, the real standout is Wednesday the 23rd. The morning comes in with 8 ft and glassy conditions, but the session to aim for is the afternoon. The swell bumps up to 8 ft from the SW with a period of 11 seconds and clean cross-off winds. The energy is strong (1627). This is excellent surf, but at that size, it’s for the experienced crew. The reef is exposed, so you’ll get the full force of it.

Then Thursday the 24th is a beast of a day. The afternoon shows a 10 ft SSW swell with a 14-second period. That’s a ton of water moving—energy is a massive 3119. The wind is offshore from the NW at 19 mph, and conditions are clean. But look, 10 ft on a reef is serious stuff. This is experts-only territory. The swell direction is a perfect match for the break’s optimum SW, and it’s gonna be a wild, powerful ride.

Things settle down after that. Friday the 25th afternoon has 6 ft SW swell with glassy conditions, a nice little window of clean surf. Sunday the 27th morning is also worth a look with 7 ft SW swell and clean cross-off winds. By the end of the month and into October, the swell drops right off and the periods shorten up, so that’s when we’re back to marginal conditions.

So, to sum it up: don’t even look at the water until the 22nd. Wednesday the 23rd afternoon is your best bet for high-quality, clean, powerful surf for the experienced surfer. Thursday the 24th is a huge, solid groundswell but only for the brave. Friday the 25th afternoon is a nice, clean, smaller option.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Wed morning. Very mild (max 18°C on Fri afternoon, min 12°C on Thu night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Sun afternoon. Warm (max 22°C on Mon afternoon, min 15°C on Sat morning). Winds decreasing (fresh winds from the E on Sat morning, light winds from the ENE by Mon night).

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
3
2
1
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
2.2
SW
13
2.5
SW
13
2.4
SSW
12
2
SW
12
2
SSW
11
1.7
SW
11
1.7
SW
13
1.6
SW
12
1.3
SW
12
1.1
SW
12
2.3
SW
14
1.9
SW
13
1.7
WSW
13
1.4
SW
12
1.3
WSW
12
1.2
SW
12
1.1
SW
11
1.2
W
11
1
SW
12
1.3
SW
8
Wave Graph
Metric surfscale
Energy kJ
1706
1643
2278
1580
1070
1045
696
940
786
448
349
1914
1164
904
607
480
407
288
338
264
200
Wind (km/h)
25
SE
30
SE
30
ESE
30
SE
35
SE
20
E
35
E
35
ESE
30
E
35
E
30
ESE
30
ESE
20
ESE
25
SE
20
ESE
25
E
25
E
15
ENE
5
ENE
5
SSE
10
NE
Wind State
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
glassy
glassy
cross
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
part cloud
part cloud
part cloud
light rain
rain showers
part cloud
part cloud
clear
clear
part cloud
part 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
Temp °C
15
15
13
16
16
13
17
18
14
17
18
16
17
16
17
20
22
18
24
24
23
Feels °C
9
8
7
8
8
7
9
10
8
11
13
11
14
13
16
17
19
16
24
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)
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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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