Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 14 Aug 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
14.5° C
1.1° 

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


Onrus surf forecast from 14 Aug 2026:

  • Best quality surf: Monday 17 Aug, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
  • Most powerful swell: Monday 17 Aug, 2AM (local time) - 10ft (3.0m), 14s period, WSW swell with 2,789 kJ wave energy.
  • Next surfable swell (1★+): Friday 14 Aug, 8AM (local time) - 5ft (1.6m), 16s 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 14) at 8AM. The primary swell is predicted to be 1.6m and 16s period. 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 14s and forecast to arrive on Monday (Aug 17) at 2AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Friday (Aug 14) at 2PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Fri 14th Aug)5ft (1.6m) 16s
Best Surf 2AM (Mon 17th Aug)10ft (3.0m) 14s
Most Powerful 2AM (Mon 17th Aug)10ft (3.0m) 14s

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


The Lowdown

G’day, this is Rusty. Let’s have a look at what’s coming up for Onrus (reef). The water’s sitting at 58°F, which is about a degree colder than normal for this time of year – so you’ll want a decent wetsuit.

The surf’s pretty quiet to start, but we’ve got a solid run of waves building from Friday the 14th, even though the early sessions are a bit marginal. Friday morning offers a 5ft WSW swell at a long 15 seconds, but the wind is a moderate WNW breeze at 16 mph, so it’s clean but not perfect. The combined energy is high (1005). Friday afternoon is similar, still clean but nothing special.

Saturday the 15th picks up a touch. The morning is a mixed bag with a 5ft WSW swell, 14-second period, and a light cross-shore wind that leaves a few ripples. The afternoon, though, is glassy with a light SSW breeze at 3 mph, and that 5ft swell cleans right up – it’s a nice little window for a session.

Now, Sunday the 16th morning is where we start seeing the standout. The swell bumps to 6ft from the WSW, 13-second period, with a clean offshore WNW wind at 9 mph. The combined energy is strong (1120), and conditions are excellent for experienced surfers. The swell is still solid and the wave shape should be good on this reef. The afternoon goes cross-off, so still rideable but not as clean.

Monday the 17th morning is a cracker. Swell hits 8ft from the WSW, 13 seconds, with a light cross-off W wind at 6 mph. The energy is very strong (2084) and it’s excellent for experienced surfers. This is the pick of the early week – proper size and clean.

Tuesday the 18th sees the swell drop a little but the wind turns onshore and choppy, so it’s a day to sit out. Wednesday the 19th morning bounces back with glassy conditions – a 7ft SW swell, 12-second period, light SSW wind at 3 mph, and excellent quality for experienced surfers. The energy is still strong (1381).

Thursday the 20th morning is glassy again with a 6ft SW swell, 11-second period, light ESE wind, and very good conditions. After that, the wind gets messy and the swell drops, so we’ve got a few days of marginal surf through Friday the 21st and into the weekend.

Now, here’s the big one. Saturday the 22nd morning sees a massive 10ft SW swell, 14-second period, with a strong offshore NW wind at 16 mph. The combined energy is huge (3305), but the swell is predicted to be too big for this break – only for experts and even then, it’s pushing limits. The same goes for Sunday the 23rd and Monday the 24th – massive swell, but too big for most.

After that, the swell backs off through the 25th and 26th, but Wednesday the 26th afternoon is glassy again with a 8ft SW swell, 15-second period, and excellent conditions for experienced surfers. The energy is very strong (2493). Thursday the 27th is also glassy in the morning with a 8ft SW swell, 13-second period, and excellent conditions.

The tail end of the outlook gets wild again – Friday the 28th afternoon has a 10ft SW swell with an onshore wind, and Saturday the 29th sees 13ft and 12ft SW swells with strong cross-onshore winds, making for poor, lumpy conditions. That’s way too big and messy.

So, the best surf on offer is Sunday the 16th morning, Monday the 17th morning, and Wednesday the 19th morning – those are your standout sessions with clean conditions and solid swell. After that, the 22nd and 23rd are huge but only for the brave.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Sun afternoon, min 12°C on Sat morning). Wind will be generally light.

Days 4-6 Weather Summary

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

Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
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
2
3
2
3
4
4
3
!
4
3
3
1
1
3
4
3
3
3
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
WSW
15
1.5
WSW
15
1.5
WSW
14
1.6
WSW
14
1.6
WSW
13
1.7
WSW
14
1.8
WSW
13
1.8
WSW
14
3
WSW
14
2.5
WSW
13
2.3
WSW
13
2.1
WSW
13
2.2
SW
13
2.4
SW
13
2.4
SW
12
2.2
SW
12
2.1
SW
12
1.8
SW
11
1.7
SW
11
1.5
SW
11
1.6
SW
12
Wave Graph
Metric surfscale
Energy kJ
987
974
791
876
824
1090
1120
1319
2789
2084
1783
1575
1503
1834
1749
1381
1249
831
721
515
687
Wind (km/h)
20
WNW
20
W
10
NNE
10
ENE
5
SW
10
WNW
15
WNW
20
W
10
NW
10
W
10
SSW
10
ESE
15
E
20
ESE
10
NE
5
SSW
5
SSW
0
ENE
5
ESE
15
SSE
15
E
Wind State
cross-off
cross-off
cross-off
cross
glassy
off
off
cross-off
off
cross-off
cross
cross-on
cross-on
on
cross
glassy
cross-on
glassy
glassy
cross-on
cross-on
High Tide
4:31PM1.74m
4:46AM1.55m
5:06PM1.69m
5:21AM1.47m
5:39PM1.60m
5:55AM1.37m
6:12PM1.47m
6:30AM1.25m
6:46PM1.33m
7:08AM1.13m
7:25PM1.19m
7:59AM1.02m
8:25PM1.07m
Low Tide
10:18AM0.00m
10:47PM0.05m
10:52AM0.06m
11:23PM0.12m
11:25AM0.15m
11:57PM0.21m
11:56AM0.26m
00:31AM0.33m
12:28PM0.39m
1:06AM0.45m
1:02PM0.53m
1:50AM0.57m
1:50PM0.65m
3:11AM0.66m
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:22
7:20
7:20
7:18
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:12
6:13
6:13
6:14
6:15
6:15
 mm
Temp °C
17
17
14
16
18
17
17
19
17
17
17
15
16
18
14
16
17
14
15
16
13
Feels °C
13
12
11
15
17
18
13
14
14
16
16
15
14
15
12
16
16
13
14
14
11
  • 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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