Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 13 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 13 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 11PM (local time) - 10ft (3.0m), 15s period, WSW swell with offshore winds.
  • Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 10ft (3.0m), 15s period, WSW swell with 3,243 kJ wave energy.
  • Next surfable swell (1★+): Sunday 13 Sep, 11PM (local time) - 4.5ft (1.4m), 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 Sunday (Sep 13) at 11PM. The primary swell is predicted to be 1.4m and 13s period with a secondary swell of 0.9m and 7s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.0m 15s and forecast to arrive on Tuesday (Sep 15) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Tuesday (Sep 15) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sun 13th Sep)4.5ft (1.4m) 13s
Best Surf11PM (Tue 15th Sep)10ft (3.0m) 15s
Most Powerful11PM (Tue 15th Sep)10ft (3.0m) 15s

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


The Lowdown

G’day, Rusty here. Let’s have a look at what’s on the cards for Onrus over the next couple of weeks. It’s a reef setup, exposed to the southwest swell, and it’s inconsistent – so you’ve gotta pick your moments.

Right now, there’s a bit of a wait. Sunday the 13th is a write-off – messy onshore wind, choppy, and the swell’s not cooperating. Monday the 14th is where things start looking up. A clean northwest offshore breeze sets in, and we’ve got a solid 4ft to 3ft SW groundswell rolling in with a period of 12 seconds. The combined energy is moderate (434), but that offshore wind will make for clean, lined-up waves. It’s not huge, but for an inconsistent spot, this is a decent chance. Crowds are sometimes an issue here, so keep an eye out.

Tuesday the 15th gets interesting. The morning’s tiny (2ft, 18-second period – very long period) with a fresh offshore from the northwest, but the energy’s weak (308). Still, that long period groundswell will wrap nicely around the reef, offering well-shaped waves if you’re patient. The afternoon sees the swell jump to 4ft with a 16-second period and a strong offshore wind (28 mph). The combined energy shoots up to 1375 (moderate-strong), but that strong wind makes paddling out a challenge – it’s clean but only for the experienced. Too big for beginners? No, but the wind is the real test.

Wednesday the 16th through to Friday the 18th is a no-go. Onshore winds, lumpy conditions, and the swell’s all over the place – not worth the paddle.

Saturday the 19th offers a slight glimmer. Light onshore wind in the morning (5ft, 12-second period, 1044 combined energy), but it’s marginal. Afternoon’s similar (6ft, 13-second period, 1032 energy). Still, it’s inconsistent, so don’t expect a crowd.

Now, the standout. Sunday the 20th is your best bet. Morning glass-off with a light cross-offshore breeze (WSW 3 mph) and a clean 5ft SW swell at 13 seconds. Combined energy is 905 (moderate), and the water’s sitting at 58°F, which is a bit colder than normal for this time of year – about 2°F cooler than average, so you’ll want a decent wetsuit. The waves will be clean and lined up on the reef, with that long period making for proper, pushy groundswell. It’s not huge, but for an inconsistent spot, this is the pick. Crowds are possible, so get in early.

Monday the 21st has onshore wind returning, but the swell’s still there – 6ft at 14 seconds from the WSW (1266 energy). Afternoon’s a mess with strong onshore. Not the same quality as Sunday.

The rest of the second week (22nd to 28th) looks rough. Onshore winds dominate, and the swell gets big – 8ft on the 25th, 12ft on the 25th afternoon, and even 13ft by the 28th. That’s well over 8ft, so experts only, and the wind’s cross-onshore or onshore, making it choppy. The setup looks more interesting for kite surfing than paddle surfing when it’s that big and messy.

Bottom line: Monday the 14th is a solid, clean option, but Sunday the 20th is the real standout – clean, glassy, and proper waves. Don’t sleep on it.

Rusty.

Short Range Forecast

Moderate rain (total 17mm), heaviest on Tue night. Warm (max 22°C on Sun afternoon, min 13°C on Tue night). Winds increasing (light winds from the ESE on Sun afternoon, strong winds from the NW by Tue afternoon).

Days 4-6 Weather Summary

Some drizzle, heaviest during Wed morning. Very mild (max 19°C on Fri afternoon, min 10°C on Fri night). Winds increasing (light winds from the E on Wed night, fresh winds from the ESE by Fri afternoon).

Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
3
2
1
2
0
2
3
1
0
2
0
0
0
0
0
0
2
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
SW
14
1.6
SW
14
1.3
SW
13
1.1
SW
12
1
SW
12
0.8
SW
12
0.6
SW
18
1.3
SW
16
2.5
WSW
14
2.4
SW
14
2.2
SW
13
1.9
SW
12
1.9
SW
12
1.8
SW
12
1.8
SW
11
1.8
SW
11
1.8
SW
13
1.7
SW
12
1.4
SW
12
1.7
SW
13
1.6
SW
13
Wave Graph
Metric surfscale
Energy kJ
1463
961
600
374
268
187
192
897
3108
2171
1599
1043
980
913
798
836
1021
846
551
991
878
Wind (km/h)
20
E
15
ESE
10
NW
25
NW
30
WNW
20
NW
35
NW
40
NW
20
SSW
20
SE
25
SE
15
ENE
20
ESE
30
SE
20
E
30
E
35
E
25
E
10
ENE
10
ESE
10
NE
Wind State
cross-on
on
off
off
off
off
off
off
cross
on
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross
High Tide
4:30PM1.67m
4:48AM1.49m
4:59PM1.58m
5:18AM1.40m
5:29PM1.45m
5:48AM1.29m
5:59PM1.31m
6:20AM1.17m
6:32PM1.17m
7:03AM1.04m
7:21PM1.04m
8:35AM0.94m
9:27PM0.96m
Low Tide
10:20AM0.09m
10:46PM0.09m
10:49AM0.17m
11:15PM0.19m
11:18AM0.28m
11:43PM0.30m
11:46AM0.40m
00:13AM0.43m
12:16PM0.52m
00:49AM0.55m
12:56PM0.65m
1:53AM0.67m
2:37PM0.76m
4:44AM0.69m
cloud
part cloud
light rain
cloud
cloud
part cloud
part cloud
part cloud
heavy rain
light rain
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:46
6:45
6:43
6:41
6:39
6:39
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:31
6:32
6:34
6:35
6:35
6:36
6:37
 mm
5
12
1
Temp °C
19
22
18
17
18
17
17
18
16
14
15
13
16
16
13
17
19
13
18
23
18
Feels °C
17
21
17
14
15
15
11
9
9
9
10
8
11
10
8
11
11
6
15
20
15
  • 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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