
Surf Forecasts:
Onrus surf forecast from 2 Sep 2026:
- Best quality surf: Monday 7 Sep, 5AM (local time) - 5.5ft (1.7m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 11AM (local time) - 7ft (2.2m), 18s period, SW swell with 3,022 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5AM (local time) - 5.5ft (1.7m), 15s 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 07) at 5AM. The primary swell is predicted to be 1.7m and 15s period with a secondary swell of 0.6m and 10s. 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 2.2m 18s and forecast to arrive on Sunday (Sep 06) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Sunday (Sep 06) at 8AM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 7th Sep) | 5.5ft (1.7m) 15s |
| Best Surf | 5AM (Mon 7th Sep) | 5.5ft (1.7m) 15s |
| Most Powerful | 11AM (Sun 6th Sep) | 7ft (2.2m) 18s |
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 on offer at Onrus over the next couple of weeks.
Right off the bat, I gotta be honest with you – the first few days are a write-off. We’ve got a solid storm track pushing through, with strong onshore winds and lumpy, blown-out conditions. Thursday morning gives us a brief 5ft WSW swell, but the 12 mph SE wind is directly onshore, and the whole thing is messy. It’s not worth paddling out for. That poor run stretches all the way through to the end of the weekend, with no real windows to speak of. The wind just doesn’t let up, gusting to 28-31 mph at times. It’s a proper battle zone out there.
Now, the good news. The change comes on Monday, the 7th of September. That morning, the wind swings to a gentle WNW cross-offshore breeze at 9 mph, and we’ve got a clean 6ft swell from the SW with a nice 14-second period. The combined energy is a solid 1275 (moderate to strong), so there’s plenty of push. This is a reef break, so that longer period groundswell is going to wrap in nicely. The water temp is about average for this time of year, nothing unusual. This is the standout session for the whole outlook – clean, lined-up waves for the experienced crew. The afternoon on Monday holds up, too, with a 6ft SW swell and clean cross-off conditions.
Tuesday the 8th of September is a real treat. The morning is glassy – I mean, dead flat calm with a 3 mph WNW breeze. The swell drops a touch to 4ft from the SSW, but the period is still a solid 12 seconds, and the energy is 547 (moderate). For a reef break, glassy conditions with that kind of groundswell is a recipe for silky, peeling walls. It’s a bit smaller, but the quality is top-notch. Crowds are *sometimes* a thing here, so you might have a few others out, but it’s worth it.
After that, we get a bit of a lull. The swell drops off, and the wind turns back onshore for a few days. There’s a small window on Tuesday, the 15th of September, in the afternoon. The wind goes glassy again with a light ESE breeze, and we have a 6ft swell from the west. The period is a short 6 seconds, though, so it’s gonna be a bit choppy and disorganised, but for a sneaky, less crowded session, it’s worth a look.
The last chance of note is on Wednesday, the 16th of September, in the morning. A fresh 19 mph WNW cross-off wind keeps the surface clean, but the swell is a solid 8ft from the SW. That’s getting into the expert-only zone, and the short 9-second period means it’ll be a bit lumpy. The energy is a massive 2812 (strong), so there’s heaps of power, but it’s only for the brave.
Overall, the clear winner is Monday the 7th. Get that in your calendar. Tuesday the 8th is a close second for the glassy, quality waves. The rest is a mixed bag of wind and waiting.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu afternoon. Very mild (max 19°C on Sat afternoon, min 12°C on Wed night). Winds increasing (light winds from the ENE on Thu morning, strong winds from the E by Sat afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Sun afternoon, min 14°C on Sat night). Winds decreasing (strong winds from the E on Sat night, calm by Mon night). | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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) | WSW 13 | WSW 13 | S 9 | SSE 9 | S 9 | SSE 8 | SSE 8 | SSW 10 | SSW 10 | SW 21 | SW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SSW 12 | SW 11 | SW 14 |
Wave Graph | |||||||||||||||||||
1338 | 763 | 1018 | 1208 | 623 | 574 | 264 | 201 | 205 | 1139 | 3022 | 1855 | 1220 | 1220 | 984 | 451 | 341 | 142 | 214 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | glassy | glassy | cross-off | glassy |
High Tide | 6:47AM1.24m | 7:09PM1.32m | 7:53AM1.12m | 8:28PM1.19m | 9:44AM1.06m | 10:28PM1.15m | 11:40AM1.14m | 00:06AM1.23m | 12:49PM1.30m | 1:08AM1.36m | 1:37PM1.47m | 1:55AM1.47m | |||||||
Low Tide | 00:39AM0.31m | 12:45PM0.42m | 1:37AM0.44m | 1:53PM0.55m | 3:13AM0.54m | 3:56PM0.62m | 5:16AM0.51m | 5:56PM0.53m | 6:34AM0.38m | 7:05PM0.37m | 7:26AM0.25m | 7:53PM0.22m | |||||||
— | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | |
6:24 | — | 6:24 | — | — | 6:25 | — | — | 6:27 | — | — | 6:28 | — | — | 6:28 | — | — | 6:29 | — | |
mm | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 14 | 15 | 17 | 14 | 16 | 19 | 15 | 18 | 25 | 22 | 23 | 24 | 18 | 20 | 20 | 17 |
Feels °C | 12 | 12 | 8 | 6 | 6 | 7 | 5 | 7 | 11 | 8 | 13 | 22 | 21 | 21 | 22 | 18 | 21 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | WSW 12 | WSW 12 | S 9 | WSW 11 | SSE 8 | SSW 10 | SSW 10 | SW 21 | SW 18 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 12 | SSW 12 | SW 11 | WSW 11 |
1338 | 763 | 359 | 218 | 623 | 103 | 264 | 201 | 205 | 1139 | 3022 | 1855 | 1220 | 1220 | 984 | 451 | 341 | 142 | 154 | |
Swell 2 Height (m) Direction Period (s) | S 9 | S 9 | W 16 | — | WSW 11 | SSW 14 | WSW 11 | WSW 10 | WSW 10 | SSW 10 | S 9 | S 12 | SE 10 | SE 13 | ESE 11 | WSW 13 | WSW 12 | WSW 12 | SW 14 |
134 | 181 | 5 | — | 111 | 19 | 66 | 59 | 38 | 145 | 14 | 24 | 73 | 44 | 12 | 227 | 113 | 106 | 214 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SSW 13 | SW 13 | SW 24 | SW 12 | — | — | SSE 16 | SSE 6 | SW 20 | SW 18 | SW 16 | S 10 | SSE 9 |
— | — | — | — | — | — | 66 | 7 | 23 | 40 | — | — | 24 | 11 | 15 | 50 | 93 | 69 | 28 | |
Wind waves Height (m) Direction Period (s) | — | SSE 8 | S 9 | SSE 9 | SE 5 | SSE 8 | ESE 5 | ESE 5 | ESE 5 | ESE 5 | ESE 7 | SE 7 | — | WNW 3 | W 4 | — | — | W 3 | — |
— | 373 | 1018 | 1208 | 70 | 574 | 56 | 100 | 147 | 133 | 158 | 103 | — | 9 | 17 | — | — | 1 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 32 | 874 | 1363 | 247 | 302 | 86 | 86 | 86 | 86 | 34 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Overberg | |||||||||||||||||||
Best forecast wave conditions in South Africa | |||||||||||||||||||
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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.










