Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.9° C
0.6° 

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


Onrus surf forecast from 17 Jul 2026:

  • Best quality surf: Wednesday 22 Jul, 11AM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
  • Most powerful swell: Friday 24 Jul, 11AM (local time) - 13ft (4.0m), 16s period, SW swell with 7,783 kJ wave energy.
  • Next surfable swell (1★+): Friday 17 Jul, 5PM (local time) - 5.5ft (1.7m), 10s 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 Friday (Jul 17) at 5PM. The primary swell is predicted to be 1.7m and 10s period with a secondary swell of 0.2m and 14s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 4.0m 16s and forecast to arrive on Friday (Jul 24) at 11AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Thursday (Jul 23) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Fri 17th Jul)5.5ft (1.7m) 10s
Best Surf11AM (Wed 22nd Jul)10ft (3.0m) 14s
Most Powerful11AM (Fri 24th Jul)13ft (4.0m) 16s

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


The Lowdown

Alright, Rusty here. Let's have a look at what’s on the cards for Onrus over the next couple of weeks.

We’ve got a decent run of surf coming up, starting this Friday the 17th of July and it looks like the waves will be hanging around for a while. The water temp is sitting at 58.8°, which is only slightly cooler than average for this time of year, so nothing too wild.

First up, Friday the 17th kicks things off with a solid 6.2 ft swell out of the southwest. The period of 11 seconds means it’s a nice groundswell, with good energy behind it – moderate energy at that, around 819. The wind is glassy, so expect clean, groomed lines at Onrus. Friday afternoon drops a touch to 5.6 ft, but still glassy and clean. This is a great start.

Saturday the 18th is a bit smaller, with 4.6 ft swell from the southwest, but with offshore wind in the morning, it’ll be clean and fun. The combined energy is in the moderate range. A solid day for a paddle.

Sunday the 19th morning sees a bigger pulse: 5.6 ft swell from the west-southwest, 12-second period and moderate offshore wind. The energy is building to 968 – a strong, punchy wave. The afternoon gets a touch bigger at 5.9 ft but goes cross-shore, so it might get a little bumpy. Still, the morning is a standout for this first weekend.

Monday the 20th is another glassy morning with 5.2 ft southwest swell, clean and inviting. Classic weekday session if you can sneak out.

Tuesday the 21st morning is special. We’ve got 5.2 ft swell from the southwest, but the period jumps to 14 seconds – that’s long-period groundswell with proper push. Energy is 963. Glassy wind. The waves will be lined up nicely, but remember, long period swells like this can sometimes straighten out at beach breaks; at Onrus, a reef setup, this is where it shines. The afternoon gets bigger at 7.2 ft but the wind turns cross-onshore, so it loses some polish.

Now, Wednesday the 22nd – things get serious. Morning brings 9.8 ft swell from the west-southwest with a 14-second period. The combined energy is huge at 5650. Offshore wind of 20 km/h means it’s clean, but this is expert territory. Only experienced surfers should even think about it. The afternoon is similar, 11.5 ft with 30 km/h cross-offshore wind. Too big for most.

Thursday the 23rd morning drops back to a manageable 5.9 ft from the south-southwest, offshore wind, and energy still high at 1680. This is a good window for strong intermediates. Thursday afternoon sees a 5.9 ft southwest swell with a massive 18-second period – very long period groundswell – and clean cross-offshore wind. The energy is 3584. This could be epic, but that long period means it might be a bit walled up and better for a point or reef like Onrus.

Friday the 24th – morning is a monster: 13.1 ft southwest swell, 16-second period, glassy wind, and energy off the charts at 7783. This is a proper big-wave day, only for the brave. The afternoon is similar at 11.5 ft but with onshore wind, so conditions will be messy.

From Saturday the 25th through the 26th, it’s pretty rough. Saturday afternoon has 30 km/h onshore wind, Sunday has fresh cross-onshore winds all day. The swell is still big, but the quality is poor. This stretch is more for kites than paddles.

Monday the 27th morning brings hope: 6.2 ft from the south-southeast, clean with a light offshore wind, energy at 1599. This is a solid session for experienced surfers. The afternoon, however, jumps to 9.8 ft and goes onshore again.

Tuesday the 28th drops right down to 3.3 ft in the morning, though with a long 13-second period. Glassy afternoon with 2.6 ft. Small, but clean and workable on a longboard.

Wednesday the 29th is better: 3.6 ft to 4.3 ft southwest swell, clean winds, glassy in the afternoon. Small but fun.

Thursday the 30th is similar, with 3.9 ft to 4.3 ft, clean conditions. Nice for a cruise.

Friday the 31st morning brings a 5.6 ft south swell, glassy, with good energy. A solid way to end the month. The afternoon goes smaller.

Finally, into August, Saturday the 1st offers 4.3 ft to 4.6 ft southwest swell, glassy in the afternoon, with a 14-second period. The energy is 1368, and it’s clean – a nice mellow session to start the month.

Overall, the standout window is Tuesday the 21st morning with that long-period groundswell and glassy conditions. If you’re an experienced surfer, Thursday the 23rd afternoon with the 18-second swell is a real gem, but keep in mind those long gaps between sets. The first weekend (17th-19th) is also a solid bet for clean, medium-size waves.

If the swell is

Short Range Forecast

Mostly dry. Very mild (max 18°C on Sat afternoon, min 13°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Wed afternoon, min 13°C on Mon morning). Wind will be generally light.

Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
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
3
2
3
3
3
3
2
2
3
2
1
3
3
4
!
!
!
4
4
!
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
11
1.7
SW
10
1.4
SW
10
1.4
SW
9
1.4
SW
9
1.4
SW
12
1.7
WSW
12
1.8
SW
11
1.9
SW
11
1.6
SW
9
1.4
SW
8
0.7
SW
16
1.6
SW
14
2.2
SW
13
2.5
SW
14
3
WSW
14
3.5
WSW
13
3
SW
12
1.8
SSW
11
1.8
SW
18
3.5
SW
16
Wave Graph
Metric surfscale
Energy kJ
819
588
369
343
338
574
756
725
819
406
256
248
907
1708
2936
3324
4009
2515
787
2195
5478
Wind (km/h)
5
NNW
5
W
10
NW
10
WNW
10
W
15
WNW
15
WNW
10
SW
5
ENE
5
WNW
5
SW
10
NE
5
ENE
5
S
5
NW
20
NW
30
WNW
10
NNW
15
NW
20
W
5
NNE
Wind State
glassy
glassy
off
off
cross-off
off
off
cross
cross-on
glassy
glassy
cross
glassy
cross-on
off
off
cross-off
cross-off
off
cross-off
cross-off
High Tide
5:38PM1.64m
5:54AM1.43m
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
Low Tide
11:22AM0.08m
11:56PM0.18m
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
cloud
cloud
part cloud
cloud
part cloud
clear
part cloud
cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:46
7:46
7:45
7:45
7:43
7:43
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:52
5:53
5:53
5:54
5:55
 mm
Temp °C
16
17
16
16
18
16
17
16
14
15
16
14
16
17
15
17
18
15
16
17
14
Feels °C
16
17
16
14
16
14
13
13
14
14
14
13
15
15
14
13
12
12
13
13
12
  • 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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