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Surf Forecasts:

Onrus surf break

Onrus surfForecast / Overberg / South Africa

information circle16 Day Weather and Surf, issued 1 pm Wednesday 18 Mar 2026 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
19.5° C
 (Which is normal for this time of year)

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 (Mar 19) at 8AM. The primary swell is predicted to be 2.0m and 14s period with a secondary swell of 0.7m and 7s. 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 2.4m 14s and forecast to arrive on Monday (Mar 23) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Thursday (Mar 19) at 5AM.

Wave TypeTime (SAST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Thu 19th Mar)6.5ft (2.0m) 14s
Best Surf 8AM (Thu 19th Mar)6.5ft (2.0m) 14s
Most Powerful11PM (Mon 23rd Mar)8ft (2.4m) 14s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast Light rain (total 6mm), mostly falling on Thu night. Warm (max 24°C on Thu afternoon, min 16°C on Fri night). Mainly strong winds.

Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Tue morning, min 16°C on Sat night). Winds decreasing (fresh winds from the SE on Sun afternoon, light winds from the ESE by Tue morning).

Wed
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
4
2
3
2
2
3
0
0
0
0
0
0
0
0
2
2
1
4
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
SSW
1.7
SSW
2.1
SSW
1.9
SSW
2
SSW
2.3
SSW
2.2
SW
2
SSW
1.7
SSW
1.5
SSW
1.6
SW
1.4
SW
1.3
SW
1.2
SW
1.5
SSW
2.2
SSW
2.3
SSW
2.2
SSW
1.7
SSW
1.4
SW
1.3
SSW
Period(s) (?)13131414139101212121211111112151413131212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)5729721700146313598658911026769647683455396360615209020201643918597472
Wind
(km/h)
25
E
25
E
10
WNW
40
WNW
20
W
15
SW
20
SW
10
E
20
ESE
30
SE
20
E
25
ESE
35
SE
20
ESE
20
ESE
30
SE
15
ESE
15
ESE
20
SSE
0
NNW
5
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
on		offoffcross-
off		crosscrosscross-
on		ononcross-
on		ononcross-
on		ononcross-
on		cross-
on		onglasscross-
off
High Tide
/ height (m)
3:08PM
1.59
3:23AM
1.75
3:42PM
1.63
3:55AM
1.79
4:16PM
1.63
4:30AM
1.77
4:52PM
1.58
5:06AM
1.69
5:31PM
1.49
5:46AM
1.56
6:14PM
1.36
6:32AM
1.40
7:07PM
1.22
7:34AM
1.22
Low Tide
/ height (m)
9:12PM
0.04
9:39AM
-0.02
9:44PM
0.01
10:12AM
-0.05
10:18PM
0.02
10:47AM
-0.02
10:53PM
0.08
11:24AM
0.07
11:31PM
0.19
12:05PM
0.20
12:15AM
0.33
12:54PM
0.35
1:12AM
0.48
Wed
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Sunrise--6:45--6:45--6:46--6:47--6:48--6:48--6:48
Sunset6:58--6:55--6:54--6:53--6:52--6:51--6:49--
part cloud
cloud
cloud
clear
rain showers
rain showers
part cloud
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
Rain (mm)
----33---------------
Temp. °C212022242118191819211821232022232126282522
Feels °C (?)191822191716161615151318191821211926282522
  • 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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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 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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