Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 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: Thursday 23 Jul, 11PM (local time) - 10ft (3.0m), 18s period, SW swell with offshore winds.
  • Most powerful swell: Friday 24 Jul, 2AM (local time) - 10ft (3.0m), 17s period, SW swell with 5,831 kJ wave energy.
  • Next surfable swell (1★+): Friday 17 Jul, 8PM (local time) - 5ft (1.6m), 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 8PM. The primary swell is predicted to be 1.6m and 10s period with a secondary swell of 0.3m and 13s. 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 17s and forecast to arrive on Friday (Jul 24) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Wednesday (Jul 22) at 11AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Fri 17th Jul)5ft (1.6m) 10s
Best Surf11PM (Thu 23rd Jul)10ft (3.0m) 18s
Most Powerful 2AM (Fri 24th Jul)10ft (3.0m) 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 on the menu for the next couple of weeks. We’ve got a single spot on the table, and it’s a reef set-up that loves a good SW groundswell. It’s a little inconsistent, but when it lights up, it’s worth the wait.

The coming days are looking pretty special. The water is sitting at 59°, which is pretty much normal for this time of year, so nothing wild there.

We kick off on Friday the 17th with a clean, glassy afternoon. The swell is a solid 6ft out of the SW with a short period of 10 seconds, and the combined energy is moderate at 604. It’s not huge, but with that glassy surface, the waves will be clean and fun for an intermediate.

Saturday the 18th keeps the good vibes rolling. The morning has offshore NW wind at 6 mph, with 5ft SW swell and a period of 9 seconds. The energy ticks up to 633. The afternoon stays clean with a cross-offshore breeze.

Sunday the 19th is where things get interesting. The morning brings a 5ft SW swell with a longer period of 12 seconds, and a solid offshore wind at 12 mph. The energy is 921, and it’s going to be clean and punchy. The afternoon gets a bit messy with a cross-shore wind, but the morning is the pick.

Monday the 20th is a glassy morning, dead calm, with 5ft of SW swell. Not huge, but perfect for a long session. The energy drops to 497.

Tuesday the 21st is a standout. The morning is glassy, and the swell is 5ft from the SW with a very long period of 14 seconds, giving it a 727 energy reading. The afternoon is the absolute highlight: 7ft of SW groundswell, that same long 14-second period, and a cross-offshore wind. The energy jumps to 1464. This is quality, clean, powerful surf for the experienced crew.

Wednesday the 22nd is a big one, but it comes with a catch. The morning has a strong offshore wind at 22 mph, with 7ft of WSW swell at 13 seconds. The energy is a serious 1648. It’s big and clean, but that wind is fresh. The afternoon gets bigger, hitting 8ft with an energy of 2221, but it’s cross-offshore and a bit of rain is on the way. This is expert territory.

Thursday the 23rd cleans up nicely. The morning has 6ft of SW swell at 11 seconds, with a gentle offshore breeze and 940 energy. The afternoon is another cracker: 6ft of WSW swell, 12-second period, clean cross-off wind, and a high energy of 1434. This is a great day for a solid paddle.

Now, Friday the 24th – this one is a bit of a heartbreaker. The swell is predicted to be massive, 10ft to 12ft out of the SW with a 15-second period. The energy is 4054 and 4763. That is way too big for this reef. Only for the most experienced, and even then, it’s pushing the limits. The wind is light and glassy in the morning, but it switches onshore in the afternoon.

From Saturday the 25th through to the end of the month, the wind turns onshore and the conditions get messy. The swell stays big, but the quality drops. There are still some windows of clean surf, like Tuesday the 28th morning with a 5ft SW swell and a cross-offshore breeze, and Wednesday the 29th and Thursday the 30th with glassy conditions and some nice long-period groundswell. But the real power is gone. The first week of August sees the swell drop right back to around 3ft to 3ft, with moderate offshore winds. It’s small, clean, and fun for a log or a fish, but nothing to get too excited about.

So, the best on offer is the afternoon of Tuesday the 21st and the afternoon of Thursday the 23rd. Those are the standouts. Get out there if you can.

Rusty.

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 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Wed afternoon. Very mild (max 19°C on Tue afternoon, min 13°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the NW by Wed morning).

Fri
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
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
3
3
3
3
2
2
2
2
1
3
4
4
3
2
4
3
4
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
SW
10
1.4
SW
10
1.4
SW
9
1.4
SW
9
1.3
SW
12
1.6
SW
12
1.8
SW
9
1.9
SW
10
1.4
SW
9
0.8
SW
10
0.7
SW
15
1.4
SW
14
2
SW
14
2.3
SW
14
2.2
WSW
13
2.5
WSW
13
2.3
SW
12
1.9
SW
11
1.7
WSW
12
3
SW
17
Wave Graph
Metric surfscale
Energy kJ
588
369
335
338
465
734
564
709
281
150
239
661
1429
1857
1648
1955
1348
940
802
5831
Wind (km/h)
5
W
10
NW
10
NW
10
WSW
15
NW
20
WNW
10
SSW
5
ENE
0
WSW
5
S
10
ENE
0
N
5
WSW
15
NW
35
NW
35
WNW
15
NW
10
NW
15
W
5
N
Wind State
glassy
off
off
cross-off
off
off
cross
cross-on
glassy
glassy
cross
glassy
cross-off
off
off
cross-off
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
11:56PM0.18m
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
cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
cloud
part cloud
rain showers
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
<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
2
Temp °C
17
16
17
18
16
17
16
14
15
16
14
17
19
15
16
15
14
15
17
15
Feels °C
17
16
16
16
15
13
13
14
15
15
13
16
17
14
10
9
9
12
13
13
  • Map Icons:
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  • 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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