
Surf Forecasts:
Onrus surf forecast from 14 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 5AM (local time) - 10ft (3.0m), 14s period, SW swell with cross-onshore winds.
- Most powerful swell: Wednesday 16 Sep, 5AM (local time) - 10ft (3.0m), 14s period, SW swell with 3,289 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 5PM (local time) - 3.5ft (1.0m), 12s 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 Monday (Sep 14) at 5PM. The primary swell is predicted to be 1.0m and 12s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 3.0m 14s and forecast to arrive on Wednesday (Sep 16) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Tuesday (Sep 15) at 8AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 14th Sep) | 3.5ft (1.0m) 12s |
| Best Surf | 5AM (Wed 16th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 5AM (Wed 16th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's coming our way for the next couple of weeks.
We're startin' off with a bit of a tease, but there's some real quality if you're patient. The first surf worth paddlin' out for hits us on Monday, September 14th, at Onrus. It's a reef setup, so you'll want your wits about you. The water's sittin' at 58° which is a bit colder than normal for this time of year, so don't be shy with the rubber.
Monday 14th is the pick of the early week. We've got a clean 4ft swell from the SW with a nice long 12-second period, pushin' moderate wave energy (454). The wind is blowin' offshore from the NW at 12 mph, keepin' those faces smooth. You won't be alone though – this spot gets crowded sometimes, so get in early. Monday afternoon holds similar, just a tad smaller and a bit breezier.
Now Tuesday the 15th... it gets interesting but tricky. The morning shows a punchy 6ft swell from the WNW, but the period drops right off to a short 6 seconds. That's a lot of bumpy, weak energy. The wind is strong offshore at 25 mph, which will clean it up but makes paddlin' into those short-period lumps a real workout. Tuesday afternoon sees the swell drop to 4ft but the period jumps to a very long 16 seconds, and the wave energy kicks right up (1283). However, that strong 28 mph offshore wind means it’s going to be a battle to get out, even if the waves are clean. This one's for the fit lads only.
Then we hit a rough patch. From Wednesday 16th all the way through to the morning of Thursday 25th, it's pretty grim. We're talkin' strong onshore and cross-onshore winds from the SE and ESE, makin' a mess of even the decent-sized swells. There's some serious energy in the water mid-week (over 2000 at times), but with those winds, it's all chop and close-outs. Honestly, good for kites, not for your log. This stretch runs for over a week.
Finally, the light at the end of the tunnel. The standout window opens on Friday morning, September 25th. This is the one to circle. We've got a solid 7ft swell from the SSW with a nice 13-second period and powerful wave energy (1791). The wind? Dead calm. Glassy. Perfect conditions for experienced surfers. That's a fair bit of size though – over 8ft puts this firmly in the "experts only" zone. Expect a heavy, lined-up reef break.
Saturday the 26th is a nice follow-up for the less brave. The swell drops to 4ft from the SW, the energy backs off (571), but it's clean with a light WNW cross-offshore breeze in the morning. A great option for a fun, manageable session.
That's about it for the run home. The last few days of the month go back to onshore slop.
So to wrap it up: suffer through the wind for a week and a half, and you'll be rewarded with a stellar Friday the 25th. Monday the 14th is your early-week clean option. Stay safe out there.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Tue night. Very mild (max 19°C on Mon afternoon, min 12°C on Wed night). Winds increasing (light winds from the NW on Mon morning, strong winds from the NW by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu morning. Very mild (max 18°C on Fri afternoon, min 12°C on Thu morning). Winds decreasing (strong winds from the ESE on Fri night, moderate winds from the SE by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 18 | SW 16 | WSW 14 | SW 14 | WSW 13 | SW 13 | SSW 12 | SW 12 | SSW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SE 10 | SW 14 | SW 13 | WSW 12 |
Wave Graph | |||||||||||||||||||||
374 | 268 | 190 | 213 | 719 | 3183 | 1368 | 1155 | 2641 | 1844 | 1130 | 1107 | 640 | 919 | 878 | 712 | 403 | 798 | 872 | 1011 | 691 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 4:59PM1.58m | 5:18AM1.40m | 5:29PM1.45m | 5:48AM1.29m | 5:59PM1.31m | 6:20AM1.17m | 6:32PM1.17m | 7:03AM1.04m | 7:21PM1.04m | 8:35AM0.94m | 9:27PM0.96m | 11:23AM0.98m | 11:40PM1.02m | ||||||||
Low Tide | 10:49AM0.17m | 11:15PM0.19m | 11:18AM0.28m | 11:43PM0.30m | 11:46AM0.40m | 00:13AM0.43m | 12:16PM0.52m | 00:49AM0.55m | 12:56PM0.65m | 1:53AM0.67m | 2:37PM0.76m | 4:44AM0.69m | 5:48PM0.72m | ||||||||
6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | |
— | 6:32 | — | — | 6:34 | — | — | 6:35 | — | — | 6:35 | — | — | 6:36 | — | — | 6:37 | — | — | 6:37 | — | |
mm | 1 | — | — | — | — | 14 | 1 | — | — | 1 | — | — | — | — | — | — | — | 1 | 4 | 3 | 1 |
Temp °C | 17 | 19 | 17 | 17 | 19 | 15 | 15 | 15 | 13 | 14 | 16 | 13 | 17 | 18 | 15 | 17 | 18 | 16 | 16 | 16 | 16 |
Feels °C | 14 | 14 | 15 | 9 | 10 | 6 | 9 | 9 | 7 | 8 | 9 | 7 | 8 | 8 | 7 | 10 | 12 | 12 | 13 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 11 | SW 16 | WSW 14 | SW 8 | WSW 13 | SW 13 | SSW 12 | SW 12 | SSW 11 | SW 11 | SW 13 | SW 13 | SW 12 | SW 12 | SW 13 | SW 14 | SW 13 | WSW 12 |
374 | 268 | 190 | 116 | 719 | 3183 | 459 | 1155 | 2641 | 1844 | 1130 | 1107 | 640 | 919 | 878 | 712 | 403 | 535 | 872 | 1011 | 691 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 12 | ESE 13 | SW 18 | SE 13 | WNW 8 | SW 14 | SW 13 | WSW 12 | — | — | — | SW 14 | — | — | SW 15 | SW 14 | SSE 6 | SE 12 | S 6 | S 6 |
80 | 37 | 17 | 192 | 7 | 165 | 1368 | 545 | 49 | — | — | — | 301 | — | — | 109 | 248 | 66 | 34 | 55 | 58 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 13 | — | ESE 11 | WSW 13 | E 11 | — | — | — | — | S 10 | — | — | — | — | SE 11 | — | SE 11 | WSW 18 |
— | — | — | 6 | — | 42 | 249 | 9 | — | — | — | — | 7 | — | — | — | — | 29 | — | 20 | 31 | |
Wind waves Height (m) Direction Period (s) | WNW 4 | WNW 6 | WNW 7 | WNW 6 | WNW 7 | — | — | S 7 | SE 6 | SE 6 | SE 5 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | SE 10 | S 6 | — | — |
21 | 109 | 77 | 213 | 557 | — | — | 131 | 209 | 228 | 65 | 190 | 111 | 181 | 136 | 212 | 178 | 798 | 58 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 155 | 155 | 220 | 272 | 245 | 38 | 40 | 302 | 247 | 247 | 1372 | 95 | 86 | 86 | 95 | 206 | 352 | 4 |
Best forecast wave conditions in Overberg | |||||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










