Onrus Surf Forecast

/ Overberg (23 surf breaks) /

South Africa (273 surf breaks)

Surf Forecasts:

Onrus surfForecast / Overberg / South Africa

12 Day Weather and Surf, issued 1 am Friday 19 Sep 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 16.1° 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 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 20) at 2AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.7m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Onrus in the next 12 days are 2.3m 14s and forecast to arrive on Wednesday (Sep 24) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Sep 20) at 2PM.

Wave Type	Time (SAST) & Date	Wave Height & Period
Next good surf (1 star+)	2AM (Sat 20th Sep)	2.5ft (0.8m) 12s
Best Surf	2AM (Sat 20th Sep)	2.5ft (0.8m) 12s
Most Powerful	11AM (Wed 24th Sep)	7.5ft (2.3m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Some drizzle, heaviest during Sun night. Warm (max 23°C on Fri afternoon, min 11°C on Fri morning). Mainly fresh winds.									Days 3-6 Weather Summary Some drizzle, heaviest during Mon afternoon. Very mild (max 16°C on Tue afternoon, min 10°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the SE by Wed afternoon).
	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	0	0	2	0	0	1	0	0	1	0	0	1	2	0	0	0	0	1	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	S	SSW	S	SSE	SSE	SSE	SSE	SSE	S	S	SW	SW	SW	WSW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	11	10	12	12	13	12	12	12	11	10	13	13	12	11	16	14	14	13	12	12	12
Wave Graph (?)
kJ (?)	746	385	187	260	277	195	109	107	61	98	106	103	205	270	357	2085	1788	1144	773	570	469
Wind (km/h)	E	ESE	N	WNW	W	NE	ESE	SSE	NW	W	S	ENE	WSW	S	SE	ESE	SE	E	ESE	SE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	on	cross- off	cross- off	cross- off	cross	cross- on	cross- on	off	cross- off	cross- on	glass	cross- off	cross- on	on	on	on	cross- on	cross- on	on	cross- on
High Tide / height (m)		2:08PM 1.51	2:23AM 1.45		2:38PM 1.59	2:53AM 1.50		3:06PM 1.64	3:22AM 1.52		3:33PM 1.65	3:49AM 1.52		3:59PM 1.63	4:16AM 1.49		4:25PM 1.57	4:42AM 1.43		4:51PM 1.49
Low Tide / height (m)			8:25PM 0.20	8:31AM 0.16		8:55PM 0.13	8:59AM 0.13		9:22PM 0.09	9:26AM 0.12		9:49PM 0.09	9:51AM 0.14		10:14PM 0.11	10:17AM 0.18		10:39PM 0.17	10:42AM 0.25		11:04PM 0.24

	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25
Sunrise	6:37	-	-	6:35	-	-	6:35	-	-	6:33	-	-	6:31	-	-	6:30	-	-	6:28	-	-
Sunset	-	6:37	-	-	6:37	-	-	6:37	-	-	6:38	-	-	6:39	-	-	6:39	-	-	6:40	-

Rain (mm)	-	-	-	-	-	-	-	-	1	-	1	-	-	-	-	-	-	-	-	-	-
Temp. °C	17	23	18	19	19	14	17	19	15	15	15	14	15	16	14	16	16	13	16	19	13
Feels °C (?)	13	19	14	13	14	12	15	16	13	11	13	12	13	13	9	10	9	8	11	12	7

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Overberg

Wind Update Continuing clean conditions at Onrus (calm at Hermanus 4 km from Onrus). 2.0m 11s groundswell from the SSW to make surfable waves.
1 hour 7 minutes ago Onrus

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1 h 7 min ago

4 km/h

Clean

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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.

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.