Onrus Surf Break

Lat Long: 34.41° S 19.17° E

Onrus Surf Forecast and Surf Report

Issued: 1 am 21 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 21 Jul 2026:

  • Best quality surf: Thursday 23 Jul, 8PM (local time) - 11ft (3.5m), 18s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with 9,496 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 8AM (local time) - 7ft (2.1m), 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 Tuesday (Jul 21) at 8AM. The primary swell is predicted to be 2.1m and 14s period with a secondary swell of 0.4m and 9s. 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 glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Thursday (Jul 23) at 8AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 21st Jul)7ft (2.1m) 14s
Best Surf 8PM (Thu 23rd Jul)11ft (3.5m) 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 get into it. We’ve got a solid run of swell for Onrus, but it’s a spot that demands respect. This is a reef break, so it’s not for the faint of heart, and it’s inconsistent, meaning you’ve got to be patient and pick your moments.

The water temp is sitting at 59.9°, which is basically bang on average for this time of year, so no surprises there.

The best surf on offer kicks off on Tuesday, July 21st. The morning session is where it’s at. We’ve got some clouds, a light 3.1 mph cross-offshore breeze, and a solid 7.9 ft swell from the SW. The period is 14 seconds, so that’s proper groundswell with plenty of push. The combined energy is 2325 (moderate-to-strong), but the wave comment says it’s excellent for experienced surfers. That 7.9 ft is a big, powerful wave for a reef, so it’s not a beginner wave. The wind is light and clean, making for a good paddle out between sets.

The afternoon of the 21st gets a bit more tricky with a 6.2 mph cross-on breeze, so the morning is the clear winner.

Wednesday, July 22nd is a write-off. The wind is up to 12.4 mph from the WNW, creating a cross-off that’s too strong for clean surfing. The swell is still there at 6.9 ft, but the conditions are marginal.

Thursday, July 23rd is the standout. The morning has a 12.4 mph offshore from the NNW, and the afternoon is even better with a 9.3 mph offshore from the WNW. The swell is 7.5 ft to 8.2 ft from the SW, with a period of 11 to 12 seconds. The wave energy is strong (1345 to 2863). This is classic offshore conditions at a reef break, meaning lined-up, hollow waves. The afternoon session with the 8.2 ft swell and 12-second period will be the pick of the day for experienced surfers.

Friday, July 24th is a no-go. The swell jumps to 11.5 ft from the SW with a 15-second period. The combined energy is 4763 (very strong). The wind is a light cross-on, but the wave comment says it’s simply too big for this break. It’s an expert-only zone at best, and even then, it’s going to be a washing machine. Kite surfers might find it interesting, but for paddle surfing, stay away.

Saturday, July 25th and Sunday, July 26th are both poor. On Saturday, the wind is cross-onshore at 9.3 mph, and the swell is dropping. Sunday has a cross-shore wind and a messy, lower-energy swell around 5.6 ft to 6.2 ft. Not worth a paddle.

Monday, July 27th sees a return of strong SW swell at 7.5 ft to 8.2 ft, but the wind is howling from the SW at 15.5 mph. The morning is a total cross-shore mess, but the afternoon improves to a clean cross-off. Still, the wind is strong, so it’s a challenging session.

Tuesday, July 28th is another big day that’s too big for the break. 11.5 ft swell from the SW with a 15-second period and 4981 energy. The wind is light and cross-off, but the wave comment says it’s too big. A beautiful, dangerous beast.

Wednesday, July 29th is a huge highlight. The morning is glassy – literally no wind, and a 8.2 ft SW swell with a 14-second period. The combined energy is 2557. This is a legendary session for anyone who can handle it. The afternoon stays clean with a light cross-off.

Thursday, July 30th is another glassy morning. 6.9 ft from the SW, 12-second period, 1856 energy. Perfectly clean reef waves. The afternoon gets a little tricky with a cross-shore wind, but the morning is pure gold.

Friday, July 31st is a step down. The wind is up again, making things messy, and the swell is dropping to 6.2 ft.

Saturday, August 1st is a total blowout. 13.1 ft to 14.8 ft of SW swell with heavy, fresh cross-onshore winds. The energy is 7934. This is a full-on storm surf, and the wave comment says “poor surf conditions.” Avoid.

Sunday, August 2nd is another glassy day, but the swell is 9.8 ft from the S with a 13-second period. The wave comment says it’s too big for the break. It’s beautiful to look at, but dangerous to surf.

Monday,

Short Range Forecast

Mostly dry. Very mild (max 15°C on Tue afternoon, min 11°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Sun night. Warm (max 21°C on Sat afternoon, min 12°C on Fri morning). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
3
3
3
4
4
!
!
!
4
2
2
3
2
2
3
1
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)
2.4
SW
14
2.5
SW
13
2.2
SW
12
2.1
SW
12
1.9
SW
12
1.8
SW
12
2.3
WSW
11
2.5
SW
12
4
SW
16
3.5
SW
15
3
SW
14
2.5
SW
14
2.5
SW
13
2.4
SW
13
2
SW
12
1.9
SW
11
1.7
SW
11
1.7
SW
11
2.3
SW
14
2.5
SW
13
2.3
SW
13
Wave Graph
Metric surfscale
Energy kJ
2290
2254
1474
1209
1031
843
1338
1884
8217
4763
3813
2357
2318
1805
1112
930
713
739
2024
2221
1677
Wind (km/h)
5
NNE
10
S
5
N
15
WNW
20
W
15
NNW
20
NNW
15
WNW
5
ENE
5
ENE
10
S
10
E
15
E
15
E
10
NE
10
SW
10
SW
20
WNW
25
SW
25
WSW
15
W
Wind State
cross-off
cross-on
glassy
cross-off
cross-off
cross-off
off
off
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-off
cross
cross-off
cross-off
High Tide
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
2:31PM1.31m
2:34AM1.36m
Low Tide
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
8:23AM0.33m
8:37PM0.40m
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
light rain
mod rain
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:43
7:43
7:43
7:43
7:41
7:41
7:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:54
5:55
5:55
5:57
5:58
5:58
 mm
1
8
1
Temp °C
14
15
13
13
15
13
15
15
14
14
17
14
16
21
18
17
16
15
13
14
13
Feels °C
13
14
12
10
11
9
11
11
12
13
16
13
13
19
16
16
15
14
8
7
8
  • 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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