Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 10 Aug 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 10 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 2PM (local time) - 7ft (2.1m), 17s period, SW swell with glassy winds.
  • Most powerful swell: Monday 17 Aug, 8AM (local time) - 8ft (2.5m), 16s period, WSW swell with 3,693 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 2PM (local time) - 7ft (2.1m), 17s 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 Thursday (Aug 13) at 2PM. The primary swell is predicted to be 2.1m and 17s period with a secondary swell of 0.6m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 2.5m 16s and forecast to arrive on Monday (Aug 17) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Tuesday (Aug 11) at 11PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Thu 13th Aug)7ft (2.1m) 17s
Best Surf 2PM (Thu 13th Aug)7ft (2.1m) 17s
Most Powerful 8AM (Mon 17th Aug)8ft (2.5m) 16s

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


The Lowdown

Hey folks, Rusty here. Let’s get into it.

The next 16 days are a real mixed bag for Onrus. We’ve got a solid run of decent swell, but the wind is going to be a constant battle. The first few days are a write-off, so be patient.

Monday 10th and Tuesday 11th are a total loss. The wind is howling onshore, making a mess of the 8ft to 7ft SSW swell. The water’s sitting at 59°, which is about average for this time of year. Don’t even bother.

Wednesday 12th is still marginal. The swell drops to 6ft from the SW, but the wind is cross-shore and choppy. Not worth the paddle.

Thursday 13th is where things start to get interesting. The swell is solid 7ft from the SW, period stretching to 18 seconds – that’s proper groundswell energy. The morning sees a light NNE cross-offshore wind, making it clean. The combined energy is pumping at 2912 (moderate-strong), but 7ft is getting big for beginners. This is for the experienced crew. Onrus is a reef break, and that long period will wrap in nicely, but it can make for some straight sections at the beach. It’s the standout of the first week.

Friday 14th morning is another good one: 5ft from the WSW with a light N cross-offshore, clean lines. The swell period is a solid 15 seconds. Good, clean fun.

Saturday 15th is glassy. Both morning and afternoon have 5-5ft of WSW swell with glassy conditions. This is your classic, clean, fun-size surf. Crowds are *sometimes* an issue here, so you might have some company.

Sunday 16th remains clean with a WNW cross-offshore breeze and 5-6ft of WSW swell. Nice.

Monday 17th the wind swings back onshore, spoiling the 8ft swell. Another one to skip.

Tuesday 18th is back to clean with a WNW cross-offshore, but the 7ft swell is a bit messy. Still, it’s clean, so it’s worth a look.

Wednesday 19th & Thursday 20th – forget it. Strong onshore winds and lumpy, messy waves. The swell is there but it’s a kite surfer’s dream, not a paddle surfer’s.

Friday 21st is a beauty. The wind is offshore from the NW, 16 mph, and the 6ft SW swell is clean. The period is only 12 seconds, but the offshore wind will hold it up. Another standout for the more experienced.

Saturday 22nd morning is glassy again with a 7ft SW swell, period 17 seconds (very long period). This is a big, clean groundswell. The combined energy is 2515 (strong). This is expert territory at 7ft, and that long period will make it a bit walled at the beach, but the reef will handle it. The best day of the whole forecast.

Sunday 23rd morning is also glassy with 7ft of WSW swell, 15 second period. Another excellent, clean, powerful day for the experienced surfer.

Monday 24th is clean in the morning with a light W cross-offshore and a 6ft SSW swell. Good, solid conditions.

Tuesday 25th has a strong NW offshore wind, but the swell is only 5ft. It’s clean, but a bit small.

So, to wrap it up: the absolute best windows are Thursday 13th morning, Saturday 22nd morning, and Sunday 23rd morning. Get on it if you’ve got the skills. The rest of the time, keep an eye on the wind – it’s the boss here.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 22°C on Thu morning, min 10°C on Tue night). Winds decreasing (strong winds from the E on Tue afternoon, light winds from the NE by Thu morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 24°C on Thu afternoon, min 15°C on Fri night). Wind will be generally light.

Mon
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
1
1
2
3
2
4
4
4
4
2
2
3
3
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
S
10
2.5
SSW
13
2.1
SSW
12
1.6
SSW
12
1.3
SW
22
1.6
SW
19
1.7
SW
18
2
SW
16
2.2
SW
18
2
SW
16
1.9
SW
16
1.6
WSW
15
1.6
WSW
15
1.7
WSW
14
1.6
WSW
13
1.6
WSW
13
1.4
WSW
14
1.4
WSW
14
1.3
WSW
14
2.1
WSW
13
Wave Graph
Metric surfscale
Energy kJ
1401
2220
1180
705
1641
1798
1741
2027
2912
2084
1672
1102
1087
1033
850
812
733
777
702
1465
Wind (km/h)
30
ESE
25
E
35
E
40
E
30
E
25
ENE
20
ENE
25
ENE
15
NE
10
ESE
10
NNE
0
NNE
5
ESE
5
W
5
ENE
10
S
10
W
10
WNW
15
WSW
10
NE
Wind State
on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross
cross-on
cross-off
glassy
glassy
cross-off
cross
cross-on
cross-off
cross-off
cross-off
cross
High Tide
2:02AM1.50m
2:34PM1.55m
2:49AM1.57m
3:16PM1.67m
3:31AM1.61m
3:54PM1.73m
4:09AM1.60m
4:31PM1.74m
4:46AM1.55m
5:06PM1.69m
5:21AM1.47m
5:39PM1.60m
Low Tide
7:58PM0.27m
8:23AM0.12m
8:47PM0.15m
9:04AM0.04m
9:30PM0.07m
9:42AM-0.00m
10:10PM0.04m
10:18AM0.00m
10:47PM0.05m
10:52AM0.06m
11:23PM0.12m
11:25AM0.15m
11:57PM0.21m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:26
7:26
7:24
7:24
7:22
7:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:08
6:09
6:10
6:10
6:12
6:13
 mm
Temp °C
13
12
14
17
13
14
20
16
22
24
22
22
20
19
19
20
17
18
20
16
Feels °C
6
6
7
9
5
9
16
11
19
23
21
21
17
17
18
18
16
15
16
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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