Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 7 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.5° C
0.1° 

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


Onrus surf forecast from 20 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 8PM (local time) - 10ft (3.0m), 18s period, SW swell with cross-onshore winds.
  • Most powerful swell: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with 8,364 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 8PM (local time) - 2.5ft (0.8m), 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 Monday (Jul 20) at 8PM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.9m and 8s. 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 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Jul 22) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Mon 20th Jul)2.5ft (0.8m) 10s
Best Surf 8PM (Thu 23rd Jul)10ft (3.0m) 18s
Most Powerful11PM (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 the next couple of weeks are shaping up like for Onrus. This is a reef setup that needs a solid SW groundswell and clean wind to really fire, and we’ve got that in spades for a few key windows.

The first bit of proper action kicks off Monday morning, 20 July. We’re looking at a clean 6 ft SW groundswell, period a touch over 10 seconds, with a gentle offshore breeze from the NW. The water’s sitting at 60°, which is pretty much normal for the time of year. The combined energy is moderate at 601, so it’s not a monster, but it’s clean and lined up. Monday afternoon drops off a bit, so make the most of the morning.

Now, Tuesday morning, 21 July, is where things get interesting. The swell jumps to 8 ft from the SW, and the period stretches to a very long 14 seconds. That’s proper groundswell energy. The wind is glassy from the NE, and the combined energy is a strong 2176. This is a serious session for experienced surfers only. That 8 ft on a reef with a long period is going to be pushing deep and powerful, not for the faint-hearted. The morning is the standout.

Wednesday afternoon, 22 July, also looks excellent. A 6 ft SW swell, 12-second period, with a 15 mph offshore wind from the WNW. Clean, powerful, and the energy is still solid at 1150. Thursday morning, 23 July, keeps it going with an 8 ft WSW swell, 11-second period, and a gentle offshore from the NW. Energy is 1419. That’s another cracking morning for the experienced crew.

The end of the first week gets a bit wild. Friday, 24 July, the swell pumps up to 12 ft from the SW with a 15-second period, but the wind is onshore and cross. The energy is a massive 5036, which is very strong, but the conditions are blown out. Kite gear might be the move if you’re into that, but for paddle surfing, it’s too big and messy. Saturday and Sunday morning, 25-26 July, are still solid with 8 ft to 7 ft SW swell, but the wind is cross-on shore. Not ideal.

The next real gem is Sunday afternoon, 26 July. Clear skies, glassy wind from the WSW, and a 7 ft SW swell with a 12-second period. Energy is 1333. That’s a beautiful, clean, pushy wave. Then Monday, 27 July, is a bit more marginal with onshore wind, so it’s not the best.

Tuesday, 28 July, is a write-off – strong winds, lumpy, blown out, with an 8 ft SSW swell. Avoid it.

But then, Wednesday, 29 July, is an absolute belter. The morning is glassy, calm wind, with a 8 ft SW swell at 13 seconds. Energy is 2072. The afternoon is also glassy from the SW. That’s two sessions of pure, clean, powerful reef waves. Only for the experienced.

The final highlight is Friday, 31 July. Morning and afternoon both have a 8 ft SW swell, 13-second period, with a solid offshore wind from the NW. Energy is 3146 in the morning. That is a top-tier day at Onrus. Clean, powerful, and consistent.

The run into early August sees the swell drop off. Sunday, 2 August, has a small 3 ft S swell, but the wind is offshore, so there might be a longboardable wave. The rest of the first week of August is poor, with onshore winds and a messy, short-period swell.

So, the absolute standouts are Tuesday morning, 21 July, and the entire day of Wednesday, 29 July. If you’re an experienced surfer and can pick your moment, those are the sessions to circle. The 31 July is also a cracker. The rest has its moments, but those two days are the real deal.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Mon afternoon, min 11°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 19°C on Sat afternoon, min 10°C on Fri morning). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
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
1
3
4
3
4
3
4
3
4
3
!
!
!
3
2
1
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)
1.7
SW
10
1.2
SW
9
0.8
SSW
16
2.4
SW
14
2.5
SW
13
2.2
SW
12
2.1
SW
12
1.9
SW
12
1.4
SW
12
2.5
WSW
11
2.4
SW
11
4
SW
16
3.5
SW
15
3
SW
14
2.5
SW
14
2.5
SW
13
2.3
SW
12
2.2
SW
12
2.1
SW
12
2
SW
12
1.4
SSW
13
Wave Graph
Metric surfscale
Energy kJ
535
221
314
2141
2390
1474
1209
1031
542
1412
1427
7559
5036
3944
2462
2354
1643
1381
1169
1112
680
Wind (km/h)
10
NW
20
W
10
NW
5
NE
10
S
5
NNE
20
WNW
25
WNW
20
NNW
15
NW
10
SE
15
E
20
E
15
SE
15
E
15
E
20
ESE
15
ENE
5
NW
5
WSW
5
SW
Wind State
off
cross-off
off
glassy
cross-on
glassy
cross-off
off
off
off
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross
off
glassy
glassy
High Tide
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
1:12PM1.12m
1:16AM1.21m
1:55PM1.21m
1:58AM1.29m
Low Tide
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
7:01AM0.50m
7:17PM0.57m
7:46AM0.42m
8:01PM0.49m
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
cloud
light rain
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:45
7:43
7:43
7:43
7:43
7:41
7:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:53
5:54
5:55
5:55
5:57
5:58
 mm
2
Temp °C
15
16
14
13
14
13
13
15
13
14
13
13
13
17
14
15
19
18
23
21
15
Feels °C
12
12
12
12
13
12
10
10
9
11
11
10
10
15
11
12
16
15
20
19
14
  • 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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