Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 pm 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Onrus sea temperature is
15.5° C
0.0° 

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


Onrus surf forecast from 18 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 5AM (local time) - 10ft (3.0m), 11s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Thursday 23 Jul, 11PM (local time) - 11ft (3.5m), 16s period, SW swell with 6,757 kJ wave energy.
  • Next surfable swell (1★+): Saturday 18 Jul, 11PM (local time) - 6ft (1.9m), 12s period with WSW 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 Saturday (Jul 18) at 11PM. The primary swell is predicted to be 1.9m and 12s period with a secondary swell of 1.7m and 12s. Another secondary swell of 0.8m and 10s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 16 days are 3.5m 16s and forecast to arrive on Thursday (Jul 23) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Sunday (Jul 19) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sat 18th Jul)6ft (1.9m) 12s
Best Surf 5AM (Thu 23rd Jul)10ft (3.0m) 11s
Most Powerful11PM (Thu 23rd Jul)11ft (3.5m) 16s

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


The Lowdown

Alright, Rusty here again. Let's break down Onrus in feet and everything else your American brain needs. This reef break is a fickle one – inconsistent, but when it lines up, it's a proper little slice of heaven. Water temp is about 60°F, which is average for this time of year – no surprises.

The next two weeks start a bit meh. Saturday July 18 afternoon: 1.5m (5 ft) from the WSW, cross-off wind, moderate energy (781). It's clean but small. Sunday July 19 is similar – a bit bigger but still marginal with stronger winds. Monday July 20 morning looks better: 1.7m (5.6 ft) from the SW, light offshore NW breeze at 5 km/h (3 mph), and clean. Energy is moderate (537). Surfable, but not a standout.

Now Tuesday July 21 is the real deal. Morning: 2.1m (6.9 ft) SW groundswell, period 14 seconds, glassy – wind from the north at 5 km/h (3 mph), no ripples. Combined energy 1662 (moderate-strong). That's a dreamy combo for a reef: long period means power and shape, and glassy conditions mean clean faces. Ideal for experienced surfers. The afternoon is bigger: 2.5m (8.2 ft) SW, 13 seconds, still glassy, energy 2207. That's expert territory. Crowds are possible on a good day, so expect some company.

Wednesday July 22 morning: 1.9m (6.2 ft) SW, 12 seconds, gentle offshore NW at 15 km/h (9 mph), clean, energy 1082. Afternoon gets a fresh offshore at 35 km/h (22 mph) but swell is 2.5m (8.2 ft) from the WSW – still good but a bit more wind. Thursday July 23 morning is glassy with 2.0m (6.6 ft) WSW, 11 seconds, energy 955 (moderate). Then the afternoon gem: only 1.3m (4.3 ft) from the SSW, but period is 19 seconds – that's a super long period groundswell. Energy is 3019 (strong) despite the smaller size. Glassy with a light WSW breeze. For a reef, that long period will produce lined-up waves – a standout for those who love a long ride.

Then the wheels fall off. Friday July 24 is too big – 3.0m (9.8 ft) SW, 14 seconds, glassy

Short Range Forecast

Some drizzle, heaviest during Sun morning. Very mild (max 18°C on Sat afternoon, min 12°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Wed afternoon, min 11°C on Tue night). Winds increasing (calm on Tue night, fresh winds from the NW by Wed afternoon).

Sat
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
4
2
3
3
3
2
2
4
4
4
4
4
4
3
5
!
!
!
3
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
9
2
WSW
12
1.9
WSW
12
2.4
SW
9
2.2
SW
10
1.7
SW
9
1.2
SW
8
0.8
SSW
16
2.1
SW
14
2.5
SW
13
2.2
SW
13
1.9
SW
12
2.5
WSW
12
2.3
WSW
11
2
WSW
11
1.3
SSW
19
3.5
SW
16
3
SW
14
3
SW
14
2.5
SW
13
Wave Graph
Metric surfscale
Energy kJ
362
1114
1018
945
851
478
205
310
1617
2172
1521
1077
2055
1307
940
1166
6427
3830
3025
2532
Wind (km/h)
20
W
15
NW
25
WNW
20
W
10
N
5
NW
10
WSW
10
NNE
5
N
5
SW
10
NW
15
NW
35
NW
15
NW
0
SW
10
SW
10
NW
5
NW
0
SW
10
E
Wind State
cross-off
off
cross-off
cross-off
cross-off
off
cross-off
cross-off
glassy
glassy
off
off
off
off
glassy
cross-off
off
glassy
glassy
cross-on
High Tide
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
12:12PM1.04m
00:20AM1.14m
Low Tide
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
5:58AM0.57m
6:16PM0.65m
part cloud
clear
light rain
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:45
7:45
7:43
7:43
7:43
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:53
5:53
5:54
5:55
5:55
 mm
1
Temp °C
18
16
15
15
14
14
15
13
14
15
13
15
17
15
16
17
15
16
17
16
Feels °C
15
14
10
11
12
13
13
12
13
13
13
11
11
10
16
16
15
16
16
16
  • 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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