Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 06 Sep 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.4°C
1.3° 

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


Onrus surf forecast from 6 Sep 2026:

  • Best quality surf: Thursday 10 Sep, 11AM (local time) - 10ft (3.0m), 16s period, SW swell with cross-onshore winds.
  • Most powerful swell: Thursday 10 Sep, 2PM (local time) - 10ft (3.0m), 16s period, SW swell with 4,356 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 11AM (local time) - 6ft (1.9m), 14s 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 (Sep 07) at 11AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.4m and 9s. 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 16s and forecast to arrive on Thursday (Sep 10) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Monday (Sep 07) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Mon 7th Sep)6ft (1.9m) 14s
Best Surf11AM (Thu 10th Sep)10ft (3.0m) 16s
Most Powerful 2PM (Thu 10th Sep)10ft (3.0m) 16s

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


The Lowdown

Alright, let's get into this.

This forecast for Onrus is a bit of a slow burner, but there are some clear windows of clean swell if you're patient and pick your moments. The first few days are pretty ordinary, but once the wind plays ball, there’s some proper quality to be had.

Right now, the start of the period is a write-off. That south-west swell is building on Sunday the 6th, but with a strong cross-onshore breeze out of the east at 19 mph, it's lumpy and choppy. The water’s sitting at 58°F, which is a bit colder than normal for this time of year, so you’ll want a decent steamer.

The first real opportunity comes Monday the 7th. Both morning and afternoon sessions are looking glassy with offshore wind from the northwest and then swinging light south-southwest. Swell drops slightly from 6ft to 6ft but stays in that solid intermediate range with a nice 14 to 13-second period. This is a classic groundswell setup for the reef here, and the energy is strong. This is your standout window for experienced surfers. The break can be inconsistent, so you might wait a bit between sets, but when they come, it’ll be worth it.

Tuesday the 8th is much smaller, dropping to under 3ft, but it’s glassy again. Good for a longboard or a fun foiling session if you have one. Not really a standout.

Wednesday the 9th is a write-off with a light cross-onshore creep and poor quality.

Now here’s the one that has my attention but comes with a health warning: Thursday the 10th. The morning session sees a massive pulse of 10ft south-west swell with a 16-second period. The energy is extreme. Problem is, the wind is cross-onshore and the forecast notes it may be too big for this break. Unless you’re a very experienced surfer comfortable with heavy, powerful reef waves, give this a miss. It might look epic, but it’s more likely dangerous and messy.

Friday the 11th through Saturday the 12th is a block of poor conditions with onshore winds and lumpy seas. Nothing doing.

Sunday the 13th is a return to form. Offshore wind from the northwest, 16 to 19 mph, cleaning up a solid 6ft to 5ft south-west groundswell. Excellent conditions for experienced surfers. The moderate offshore will hold the waves open and clean. This is another standout window.

Monday the 14th morning looks great with a moderate offshore, 4ft swell and clean lines. Monday afternoon gets weird—short period windswell at 7 seconds and 8ft from the west. That’s more of a messy, blown-out offering. Might be better for a kite than a paddle.

Tuesday the 15th morning sees another big 10ft west-southwest swell with long period, but again, flagged as possibly too big for the break. The afternoon improves with offshore wind and 8ft, which should be manageable for the experienced crew.

From Wednesday the 16th through to Thursday the 17th, it’s onshore and messy again. Not worth the drive.

Friday the 18th is a mixed bag with a cross-shore breeze and a 8ft south-east swell. It's marginal at best.

Now the real treat is the final weekend: Saturday the 19th and Sunday the 20th. Clean conditions with cross-offshore or light offshore wind, solid 6ft to 8ft south-west swell, and long-period energy in the 13 to 16-second range. This is proper groundswell and should handle the reef beautifully. Energy is strong. These are your best bets for a clean, powerful session.

Monday the 21st is marginal again with light onshore creep. The period fades a bit.

Overall, the standout sessions are Monday the 7th, Sunday the 13th, and the weekend of the 19th and 20th. Get on it when the wind is offshore.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Mon afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the E on Sun afternoon, calm by Mon morning).

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Thu night. Very mild (max 19°C on Thu afternoon, min 13°C on Thu night). Winds increasing (light winds from the ESE on Wed night, strong winds from the E by Fri night).

Sun
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
4
4
2
2
2
1
1
0
2
!
0
0
0
0
0
0
0
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
16
2
SW
15
1.9
SW
14
1.8
SW
13
1.1
WSW
13
0.9
WSW
12
0.8
WSW
11
0.8
SW
11
1
SW
13
0.9
WSW
13
1.6
SW
12
3
SW
16
3
SW
15
2.4
SW
14
2.4
SW
13
1.8
SW
12
1.4
SW
13
1.8
SW
13
2.2
SW
16
2.4
SSW
14
Wave Graph
Metric surfscale
Energy kJ
2113
1672
1383
1083
389
251
166
169
342
299
785
4107
3612
2050
1846
925
711
974
2354
2313
Wind (km/h)
30
E
20
ENE
5
NW
5
SSW
10
NE
5
SSW
5
SSW
10
ENE
10
S
15
SSE
15
ESE
15
ESE
25
SE
25
SE
30
ESE
30
E
40
E
30
E
25
ESE
15
ENE
Wind State
cross-on
cross-on
glassy
glassy
cross
glassy
glassy
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
00:06AM1.23m
12:49PM1.30m
1:08AM1.36m
1:37PM1.47m
1:55AM1.47m
2:17PM1.61m
2:35AM1.55m
2:53PM1.70m
3:11AM1.59m
3:27PM1.75m
3:45AM1.60m
3:59PM1.73m
4:17AM1.56m
Low Tide
5:56PM0.53m
6:34AM0.38m
7:05PM0.37m
7:26AM0.25m
7:53PM0.22m
8:07AM0.13m
8:34PM0.10m
8:44AM0.06m
9:11PM0.03m
9:17AM0.03m
9:45PM0.00m
9:49AM0.04m
10:16PM0.03m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
light rain
light rain
cloud
light rain
light rain
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:52
6:50
6:48
6:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:28
6:28
6:29
6:30
6:30
6:30
6:31
 mm
3
2
3
2
Temp °C
21
17
23
26
21
22
24
19
18
18
15
17
19
15
13
13
15
15
18
17
Feels °C
15
15
23
25
19
22
24
17
18
16
13
14
16
11
8
6
8
11
15
17
  • 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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