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Onrus surf break

Onrus surfForecast / Overberg / South Africa

information circle12 Day Weather and Surf, issued 7 pm Monday 18 Aug 2025 SAST
Forecast update in hr  min  s Forecast update imminent
Onrus surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Onrus sea temperature is
15.1° C
 (Which is slightly cooler than normal)

Best Forecast Surf Conditions for Onrus this week:

The surf forecast for Onrus over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 18) at 11PM. The primary swell is predicted to be 1.1m and 18s period with a secondary swell of 1.2m and 15s. Another secondary swell of 1.2m and 9s is also forecast. Another secondary swell of 1.6m and 8s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 12 days are 6.0m 14s and forecast to arrive on Saturday (Aug 23) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Wednesday (Aug 20) at 5PM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Mon 18th Aug)3.5ft (1.1m) 18s
Best Surf11PM (Wed 20th Aug)10ft (3.0m) 11s
Most Powerful 2PM (Sat 23rd Aug)20ft (6.0m) 14s

Table - best surf conditions forecast for Onrus over the next 12 days.

Hourly12 Days
Overberg Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 

Short Range Forecast Light rain (total 2mm), mostly falling on Wed night. Very mild (max 18°C on Wed afternoon, min 13°C on Tue night). Winds increasing (light winds from the E on Tue night, fresh winds from the WNW by Wed afternoon).

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Sat morning. Very mild (max 14°C on Thu night, min 10°C on Sun morning). Winds decreasing (near gales from the WNW on Fri night, light winds from the NW by Sun morning).

Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Mon
25
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
4
3
3
4
3
1
!
!
3
4
!
!
!
0
!
!
!
!
!
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.3
WSW
2.5
WSW
2.2
WSW
1.9
SW
1.5
WSW
1.2
WSW
3.5
WSW
3
WSW
2.5
WSW
2.5
W
3.5
WSW
3
SW
4
WSW
6
SW
5.5
SW
4.5
SW
4
SW
3.5
SW
3.5
SW
3
SW
2.5
SSW
Period(s) (?)161514131212121111111111101314141413131312
Wave
Graph
(?)Metric surfscale
Energy (?)291127351974129975138749263886163726514601425935231171712787888862454760387426692151
Wind
(km/h)
15
NNW
15
WNW
10
SSW
10
NNE
15
NW
35
NW
25
WNW
15
NNW
35
WNW
25
NW
30
NW
40
WNW
50
WNW
45
WSW
30
W
10
WNW
5
NW
10
SW
15
ENE
25
E
25
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcross-
off		crosscross-
off		offoffcross-
off		cross-
off		offoffoffoffoffcross-
off		cross-
off		cross-
off		offcrosscrosscross-
on		cross-
on
High Tide
/ height (m)
12:02AM
1.21
12:54PM
1.22
1:11AM
1.31
1:47PM
1.35
2:00AM
1.40
2:28PM
1.48
2:40AM
1.48
3:04PM
1.57
3:16AM
1.52
3:36PM
1.63
3:48AM
1.53
4:06PM
1.65
4:18AM
1.51
4:35PM
1.63
Low Tide
/ height (m)
6:40AM
0.42
7:07PM
0.45
7:36AM
0.31
7:59PM
0.33
8:18AM
0.21
8:41PM
0.23
8:54AM
0.13
9:17PM
0.16
9:26AM
0.09
9:50PM
0.12
9:56AM
0.08
10:21PM
0.12
10:24AM
0.11
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
Sunday
24
Mon
25
Sunrise-7:18--7:16--7:16--7:15--7:13--7:13--7:11-
Sunset--6:15--6:15--6:15--6:16--6:17--6:17--6:19
clearclearclearclearclearclearrain showerspart cloudpart cloudrain showersrain showerspart cloudrain showerslight rainpart cloudcloudpart cloudclearclearclearclear
Rain (mm)
------2--11-24-------
Temp. °C161617141718151618141414131313121213121218
Feels °C (?)13141514131110131298763469910613
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Overberg

  1. weather stationWind Update Continuing clean conditions at Onrus (calm at Hermanus 4 km from Onrus). 1.4m 8s swell from the W with a 1.0m 15s groundswell from the SW and a 0.6m 12s groundswell, also from the SW as well as a 0.5m 19s long period groundswell, also from the SW. 4 swells combining so expect closeout sets.

    1 hour 21 minutes ago Onrus
Expand
<
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1 h 21 min ago

4 km/h
E
Clean
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Onrus surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Onrus at:
surf-forecast.com

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 12 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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