Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.5° C
0.0° 

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


Onrus surf forecast from 18 Jul 2026:

  • Best quality surf: Wednesday 22 Jul, 11AM (local time) - 10ft (3.0m), 12s period, WSW swell with offshore winds.
  • Most powerful swell: Thursday 23 Jul, 8PM (local time) - 13ft (4.0m), 17s period, SW swell with 8,345 kJ wave energy.
  • Next surfable swell (1★+): Saturday 18 Jul, 11PM (local time) - 5.5ft (1.7m), 12s 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 Saturday (Jul 18) at 11PM. The primary swell is predicted to be 1.7m and 12s period with a secondary swell of 0.8m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 4.0m 17s and forecast to arrive on Thursday (Jul 23) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Jul 22) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sat 18th Jul)5.5ft (1.7m) 12s
Best Surf11AM (Wed 22nd Jul)10ft (3.0m) 12s
Most Powerful 8PM (Thu 23rd Jul)13ft (4.0m) 17s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s in store for Onrus over the next couple of weeks.

We’ve got a real mixed bag coming up, but the good news is there’s some serious swell on the horizon. The first few days are a bit of a warm-up, but from Sunday morning, things start to get interesting. The water temp is sitting right on 59.9°F, which is bang on average for this time of year, so nothing unusual there.

Saturday, 18 July kicks things off with a clean 4.6ft SW swell at 9 seconds. The wind is a light offshore from the WNW, so the surface will be tidy. The wave energy is moderate (585), and while it’s not massive, it’s a fun size for an intermediate. The inconsistent nature of the reef means you’ll have to be patient, but it’s a solid start.

Sunday, 19 July is where it starts to build. The morning brings a solid 6.2ft WSW swell, with a long 12-second period, giving it some real grunt (combined energy 1135). The wind is a moderate offshore from the WNW, so it’ll be clean and powerful. This is excellent for experienced surfers. The afternoon sees it jump to 8.2ft, but the wind goes cross-offshore, so it’s still ridable, just a bit more tricky.

Monday, 20 July is a real gem. The morning is glassy, with a light northerly wind and a clean 5.6ft SW swell. The period is 9 seconds, so it’s a nice, workable wave. The combined energy is moderate (540), but the glassy conditions make it a standout for a morning session. Afternoon goes cross-shore and the swell drops a touch, so stick to the morning.

Tuesday, 21 July is the absolute standout of the entire forecast. The morning is glassy again, with a 6.6ft SW swell that has a very long 14-second period. The combined energy is strong (1540), and those long-period lines will be wrapping around the reef beautifully. The wind is light, glassy, perfect. This is the one to circle. The afternoon stays clean with a cross-offshore wind, but the morning is the magic window.

Wednesday, 22 July – this is where it gets big. The swell hits 9.8ft from the WSW, and while the wind is offshore, the forecast says it’s simply too big for this break. This is expert-only territory, and even then, it’s pushing it. The combined energy is massive (2347), so unless you’re a local charger, give it a miss.

Thursday, 23 July – the swell is still huge, 9.8ft with a very long 17-second period, and the energy is off the charts (6077). The wind is a cross-onshore, making it choppy and messy. It’s a no-go for paddling; this looks more like a day for the kite surfers.

Friday, 24 July – still massive, 9.8ft with a 14-second period. The morning is glassy, but the size is still too much for a practical paddle session. The afternoon goes onshore, so it’s a washout.

Saturday, 25 July – the swell drops to 8.2ft, but the wind is a cross-onshore, making it choppy and unappealing. Not worth the drive.

Sunday, 26 July – things settle down. The morning brings a 6.2ft SSW swell with a very long 16-second period. The combined energy is strong (2038), and the wind is a light cross-offshore, so it’s clean. The afternoon is glassy with a 6.6ft SSW swell, also with a very long 15-second period. This is another excellent window for experienced surfers, with those long-period lines offering plenty of power.

Monday, 27 July – nice and clean. The morning is a 6.9ft SW swell with a 13-second period, and the wind is light cross-offshore. The afternoon is a solid 5.6ft with offshore winds. Both are excellent for experienced surfers.

Tuesday, 28 July – a 7.2ft swell in the morning with a cross-offshore wind, clean and powerful. The afternoon gets a bit windier and the rain comes in, but the morning is the pick.

Wednesday, 29 July – the swell picks up again to 8.2ft, with a strong offshore wind. It’s clean and powerful, but the size is again for experienced crew only. The afternoon is 9.8ft, too big for the break.

Thursday, 30 July –

Short Range Forecast

Some drizzle, heaviest during Sun afternoon. Very mild (max 18°C on Sat afternoon, min 12°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Thu morning. Very mild (max 17°C on Wed afternoon, min 12°C on Tue morning). Winds increasing (calm on Tue morning, fresh winds from the NW by Wed afternoon).

Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
4
4
3
3
3
1
2
4
4
4
!
!
4
1
!
!
!
!
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
9
1.5
WSW
9
1.9
WSW
12
1.9
WSW
12
2.5
WSW
9
2.1
SW
10
1.7
SW
9
1.4
SW
8
0.8
SSW
16
2
SW
14
2.4
SW
13
2.3
SW
13
3
WSW
12
3
WSW
12
2.4
WSW
11
2.4
SW
11
3
SW
17
3.5
SW
16
3
SW
14
3
SW
14
3
SW
14
Wave Graph
Metric surfscale
Energy kJ
307
362
1062
1000
990
900
478
286
310
1494
2035
1847
2338
2129
1326
1427
5868
6242
3285
3240
3155
Wind (km/h)
15
WNW
20
W
15
NW
25
WNW
20
W
10
N
5
N
5
SW
5
NNE
5
WNW
10
WSW
15
NW
15
NW
30
NW
20
NW
15
ESE
15
E
5
NNW
0
N
10
SSE
15
ENE
Wind State
off
cross-off
off
off
cross-off
cross-off
glassy
cross
cross-off
glassy
cross-off
off
off
off
off
cross-on
cross-on
off
glassy
on
cross-on
High Tide
6:19PM1.56m
6:36AM1.32m
7:00PM1.46m
7:20AM1.21m
7:44PM1.34m
8:10AM1.10m
8:34PM1.23m
9:16AM1.02m
9:41PM1.14m
10:45AM1.00m
11:04PM1.11m
12:12PM1.04m
00:20AM1.14m
Low Tide
12:01PM0.17m
00:40AM0.26m
12:39PM0.28m
1:24AM0.36m
1:19PM0.41m
2:12AM0.46m
2:05PM0.53m
3:12AM0.54m
3:08PM0.63m
4:32AM0.59m
4:43PM0.67m
5:58AM0.57m
6:16PM0.65m
part cloud
part cloud
clear
part cloud
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
rain showers
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:46
7:45
7:45
7:43
7:43
7:43
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:53
5:53
5:54
5:55
5:55
 mm
1
1
Temp °C
16
18
16
16
15
13
14
15
13
14
15
14
16
17
15
13
17
15
15
17
15
Feels °C
14
15
14
11
11
11
13
13
12
14
14
13
12
11
10
10
15
13
15
16
13
  • 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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