Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.1° C
0.4° 

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


Onrus surf forecast from 7 Aug 2026:

  • Best quality surf: Friday 7 Aug, 11PM (local time) - 10ft (3.0m), 14s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 8 Aug, 5PM (local time) - 11ft (3.5m), 14s period, SW swell with 4,697 kJ wave energy.
  • Next surfable swell (1★+): Friday 7 Aug, 11PM (local time) - 10ft (3.0m), 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 Friday (Aug 07) at 11PM. The primary swell is predicted to be 3.0m and 14s period. 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 3.5m 14s and forecast to arrive on Saturday (Aug 08) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 8s period and expected on Tuesday (Aug 11) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 7th Aug)10ft (3.0m) 14s
Best Surf11PM (Fri 7th Aug)10ft (3.0m) 14s
Most Powerful 5PM (Sat 8th Aug)11ft (3.5m) 14s

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


The Lowdown

Alright, let's get into it. The next couple of weeks have some proper size on the cards, but it’s a mixed bag. The ocean is gonna be thumping for a while, but you gotta pick your moments. There’s a big pulse of energy forecast down the line, but it looks like it might be too much of a good thing for the spot we’re looking at.

The first real shout is for Saturday morning, the 8th. We’ve got a solid 8.2ft of SW swell pushing through Onrus, with a clean 13-second period. The wind is offshore out of the NW at 12 mph, which is going to keep the face nice and lined up. The water temp is sitting at 59.2°, which is about normal for this time of year, so nothing crazy there. The combined energy is strong at 2158, so there’s plenty of push. This is the standout window for the week – experienced surfers are going to be on it. Onrus is a reef break, so it's going to handle this size well, and it’s exposed to that SW groundswell perfectly. It’s a bit inconsistent, but when the sets roll through, they’ll be worth the wait. Crowds are possible, so get in early.

Saturday afternoon sees the swell kick up to 11.5ft with a cross-shore wind, but it’s getting too big for this set-up and the conditions get a bit messy. From Sunday through to Wednesday, the wind turns onshore or cross-onshore, and the surf quality drops right off. It's a write-off, with lumpy, choppy conditions. The energy remains moderate for most of that time, but it’s not doing us any favors.

Things start to look interesting again on Thursday afternoon, the 13th. The swell drops to a more manageable 6.2ft from the SW, and the wind goes totally glassy. That’s a beautiful thing to see. The period is a long 16 seconds, which means proper groundswell. Definitely a good one for the experienced crew, and the consistency should be better than the start of the week.

Friday the 14th also looks clean and inviting. It’s a little smaller, around 4.9ft, but another glassy afternoon is on the cards. It’s a more user-friendly size, so if the big stuff on Saturday is too much for you, this is the one to target.

The next couple of days hold on to some decent, clean surf. Monday the 17th and Tuesday the 18th both have mornings with light offshore or cross-offshore winds and head-high swell in the 5.6ft to 6.9ft range. These are looking like really solid days to be out there.

Now, for the long range, we’ve got a massive anomaly building for the 21st and 22nd of August. The swell charts are showing an enormous pulse of energy, with wave heights pushing 14.8ft to 16.4ft and combined energy readings going through the roof, like 5517 and 6940. This is serious, heavy water. The problem is, it’s way too big for Onrus. It’s going to be a washing machine – a real expert-only situation, if even that. The wind also looks to be onshore or cross-on, so conditions will be rough. For the average surfer, this is a time to stay on the beach. It’s still over a week away, so the forecast could change, but right now it looks like a proper bomb.

Honestly, the early call for Saturday the 8th is the pick of the bunch for the coming days. It’s got the size, the direction, and the clean offshore wind. Mark it in the calendar.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Sat afternoon. Very mild (max 17°C on Sat afternoon, min 11°C on Fri night). Winds increasing (calm on Fri afternoon, fresh winds from the SSE by Sun morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Tue night). Mainly fresh winds.

Fri
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
!
!
4
!
!
0
0
1
0
0
0
0
0
0
0
0
0
2
4
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
SW
15
3
SW
14
2.5
SW
13
3.5
SW
14
3.5
SW
13
3
SW
12
3
SW
12
2.5
SW
12
1.7
SW
11
1.9
S
10
2.5
SSW
13
2.1
SSW
12
1.7
S
12
1.2
SW
22
1.6
SW
19
1.6
SW
18
1.8
SW
16
2.1
SW
17
1.9
SW
16
1.7
WSW
15
Wave Graph
Metric surfscale
Energy kJ
4234
3119
2158
4697
3587
2454
2499
1649
676
654
2084
1180
773
1326
1727
1610
1771
2719
1875
1288
Wind (km/h)
10
WSW
10
WNW
20
NW
20
SSW
15
SSW
35
S
30
S
20
SSE
20
SE
25
ESE
25
E
35
ENE
35
E
25
ENE
25
ENE
25
E
25
ENE
15
NE
5
NE
15
NE
Wind State
cross-off
cross-off
off
cross
cross
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
glassy
cross
High Tide
10:22PM1.23m
11:33AM1.12m
11:57PM1.28m
12:51PM1.25m
1:08AM1.39m
1:47PM1.41m
2:02AM1.50m
2:34PM1.55m
2:49AM1.57m
3:16PM1.67m
3:31AM1.61m
3:54PM1.73m
4:09AM1.60m
Low Tide
3:45PM0.57m
5:11AM0.46m
5:37PM0.54m
6:35AM0.36m
6:59PM0.41m
7:35AM0.23m
7:58PM0.27m
8:23AM0.12m
8:47PM0.15m
9:04AM0.04m
9:30PM0.07m
9:42AM-0.00m
10:10PM0.04m
clear
clear
part cloud
light rain
light rain
rain showers
rain showers
rain showers
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:30
7:28
7:28
7:26
7:26
7:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:07
6:07
6:07
6:08
6:09
6:10
 mm
2
4
3
1
1
Temp °C
16
12
15
17
12
12
13
12
13
13
12
12
15
11
13
18
12
15
19
17
Feels °C
15
10
11
13
10
4
5
5
7
7
5
5
8
4
7
12
6
11
17
14
  • 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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