
Surf Forecasts:
Onrus surf forecast from 10 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 8PM (local time) - 10ft (3.0m), 13s period, SW swell with onshore winds.
- Most powerful swell: Wednesday 16 Sep, 2AM (local time) - 10ft (3.0m), 16s period, SW swell with 4,885 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 2AM (local time) - 4.5ft (1.3m), 13s 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 2AM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.8m 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 3.0m 16s and forecast to arrive on Wednesday (Sep 16) at 2AM. 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 6s period and expected on Tuesday (Sep 15) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 14th Sep) | 4.5ft (1.3m) 13s |
| Best Surf | 8PM (Wed 16th Sep) | 10ft (3.0m) 13s |
| Most Powerful | 2AM (Wed 16th Sep) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Rightyo, Rusty here. Let’s have a look at what’s on the cards for this stretch.
We’ve got a bit of a shaky start on the table, but if you’re patient, there’s a proper gem waiting for you in the second week. The first few days are a write-off, honestly. Thursday the 10th has some decent sized south-west groundswell rolling in—7ft with a 15-second pulse from the south-west—but the wind is a cross-on mess, and the water’s sitting at a notable 57°F, which is a touch colder than usual for this time. The combined energy is pumping at 2061 (moderate to strong), but the onshore breeze kills it. Friday and the weekend are even worse; the wind gets nasty, chopping everything up, so we’re looking at a few days of nothing until things start to clean up.
The first real sign of life pops up on Monday the 14th. The swell drops to a modest 3ft to 4ft from the south-west, but the wind finally swings north-west and turns offshore. It’s clean, but the energy is on the lighter side (392 to 455). It’s a small, tidy option. Tuesday the 15th is a bit of a mixed bag—the morning has a super long 19-second period on a tiny 2ft swell (energy 628), which is pure quality but tricky to catch due to the strong offshore. The afternoon picks up to 6ft at 17 seconds (energy 1822), but the wind is howling offshore, making it a tough paddle.
Now, the standout. If you can wait, Saturday the 19th is the one. This is the best on offer. The wind goes glassy, dead calm, with combined energy of 2065, and a solid 7ft to 7ft south-west groundswell hitting at 15 to 16 seconds. The water is clean, and conditions are described as excellent for experienced surfers. At 7ft, this is proper size, so it’s not for beginners—this is for those who know what they’re doing. The offshore wind (glass) will make for some dreamy lines at Onrus. Keep in mind, with a long period swell like that, it’ll be best on the reef setup here, and with crowds listed as “sometimes,” you might have a few others around, but it won’t be a circus. This is the absolute highlight.
Sunday the 20th looks potentially too big—10ft from the south-west with energy over 5600—but the wind is onshore, which is a shame. After that, the wind stays in the cross-on range, and the swell fades, so the real window is that Saturday blast. There’s a small, clean tease right at the end on Friday the 25th with a 5ft south-west swell and light offshore wind, but it’s a low-energy type, so not the same caliber as the big Saturday.
So, in short: sit tight through the grotty start, and aim for Saturday the 19th. That’s your session. The rest is mostly a write-off, but that one day is a ripper.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sat night. Very mild (max 17°C on Thu afternoon, min 14°C on Thu morning). Winds increasing (light winds from the ESE on Thu morning, fresh winds from the E by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Tue night. Very mild (max 19°C on Mon afternoon, min 12°C on Tue night). Winds increasing (light winds from the N on Sun night, strong winds from the NW by Tue afternoon). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 15 | SW 14 | WSW 13 | SW 12 | WSW 12 | WSW 12 | SW 15 | SW 17 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 | SW 19 | SW 17 | SW 16 | SW 14 | SW 13 | SW 12 |
Wave Graph | |||||||||||||||||||||
2061 | 1672 | 1338 | 933 | 647 | 359 | 1526 | 2945 | 2038 | 1220 | 961 | 537 | 374 | 268 | 190 | 369 | 1816 | 4885 | 1811 | 1710 | 1327 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | off | off | off | off | off | cross-on | on | on | cross |
High Tide | 2:53PM1.70m | 3:11AM1.59m | 3:27PM1.75m | 3:45AM1.60m | 3:59PM1.73m | 4:17AM1.56m | 4:30PM1.67m | 4:48AM1.49m | 4:59PM1.58m | 5:18AM1.40m | 5:29PM1.45m | 5:48AM1.29m | 5:59PM1.31m | ||||||||
Low Tide | 8:44AM0.06m | 9:11PM0.03m | 9:17AM0.03m | 9:45PM0.00m | 9:49AM0.04m | 10:16PM0.03m | 10:20AM0.09m | 10:46PM0.09m | 10:49AM0.17m | 11:15PM0.19m | 11:18AM0.28m | 11:43PM0.30m | 11:46AM0.40m | 00:13AM0.43m | |||||||
6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | |
— | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:32 | — | — | 6:34 | — | — | 6:35 | — | |
mm | — | — | — | — | — | — | 1 | 2 | 5 | 1 | 1 | 4 | 2 | — | — | — | — | 22 | — | — | — |
Temp °C | 16 | 17 | 15 | 16 | 17 | 16 | 16 | 15 | 16 | 16 | 17 | 18 | 17 | 19 | 17 | 18 | 18 | 16 | 15 | 15 | 13 |
Feels °C | 15 | 16 | 15 | 11 | 12 | 12 | 12 | 10 | 11 | 12 | 14 | 19 | 12 | 13 | 14 | 11 | 10 | 8 | 8 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | WSW 13 | SW 12 | WSW 12 | WSW 12 | SW 15 | SW 17 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 17 | ESE 11 | SW 14 | SW 13 | SW 12 |
2061 | 1672 | 1338 | 933 | 647 | 359 | 1526 | 2945 | 2038 | 1220 | 961 | 537 | 374 | 268 | 190 | 259 | 1816 | 40 | 1811 | 1710 | 1327 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | S 6 | — | SSE 7 | SW 20 | — | — | S 7 | — | SSE 7 | SSE 7 | SE 13 | WNW 5 | SW 19 | ESE 11 | — | SW 9 | E 10 | SSE 7 |
— | — | — | 49 | — | 77 | 99 | — | — | 45 | — | 57 | 18 | 57 | 30 | 369 | 100 | — | 743 | 9 | 125 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SSW 10 | SW 20 | — | — | — | — | SE 11 | SE 11 | — | SE 12 | ESE 13 | S 9 | — | E 11 | — | SSW 12 |
— | — | — | — | — | 88 | 98 | — | — | — | — | 76 | 32 | — | 24 | 16 | 6 | — | 20 | — | 133 | |
Wind waves Height (m) Direction Period (s) | — | — | — | SSE 6 | SSE 7 | E 3 | SE 6 | SE 7 | SE 8 | SE 7 | SE 7 | — | WNW 5 | WNW 6 | WNW 6 | WNW 5 | WNW 6 | SW 16 | SSW 9 | SSW 8 | SE 7 |
— | — | — | 91 | 175 | 6 | 95 | 200 | 269 | 184 | 135 | — | 67 | 130 | 175 | 50 | 186 | 4885 | 986 | 547 | 200 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 25 | 83 | 10 | 91 | 91 | 23 | 40 | 1030 | 45 | 38 | 4 | 0 | 92 | 0 | 0 | 103 | 155 | 89 | 272 | 23 | 10 |
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.










