
Surf Forecasts:
Onrus surf forecast from 16 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with offshore winds.
- Most powerful swell: Thursday 23 Jul, 5PM (local time) - 11ft (3.5m), 17s period, SW swell with 7,071 kJ wave energy.
- Next surfable swell (1★+): Thursday 16 Jul, 11PM (local time) - 6.5ft (2.0m), 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 Thursday (Jul 16) at 11PM. The primary swell is predicted to be 2.0m 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 3.5m 17s and forecast to arrive on Thursday (Jul 23) at 5PM. Winds are predicted to be glassy 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 (Jul 21) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 16th Jul) | 6.5ft (2.0m) 12s |
| Best Surf | 8PM (Tue 21st Jul) | 10ft (3.0m) 14s |
| Most Powerful | 5PM (Thu 23rd Jul) | 11ft (3.5m) 17s |
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 down the line for Onrus.
We've got a bit of a slow start, but the long-range picture is a story of two halves. The first week offers some fun, clean waves, but the real standout is a monster pulse of swell that hits in the second week. That one's for the experienced crew only.
The water temp is sitting at 59°, which is pretty much bang on average for this time of year, so nothing to worry about on that front.
Thursday 16th kicks things off with a solid 7ft SW groundswell, with a period of 13 seconds. The combined energy is a strong 1471, and with a light cross-off wind, it's clean. This is a good one for experienced surfers.
Friday 17th and Saturday 18th see the swell backing down a touch, but the conditions are lovely. Friday morning has a 6ft SW swell, and by Friday afternoon we get a glassy 6ft. Saturday is similar with a clean 5ft and offshore winds. Good, clean waves for the intermediate crew.
Sunday 19th the swell picks back up to 6ft, but the wind (16 mph) makes it a bit average. The energy is still strong (1048), but it's not the cleanest.
Monday 20th is a beauty. Glassy conditions with a 5ft SSW swell. The kind of morning you don't want to sleep in for.
Tuesday 21st is the first real standout. Early morning is glassy again with a 7ft SW groundswell at 14 seconds. The energy is through the roof (1530). This is excellent surf for experienced surfers. The afternoon gets a bit onshore, but the morning window is pure gold.
Now, for the second week, things get serious. From Wednesday 22nd July through to Sunday 27th July, the swell is just too big for Onrus. We're talking 10ft to 13ft SW groundswells with periods of 14-16 seconds. The combined energy hits five-digit figures (over 5600 at one point). This is expert-only territory, and even then, it's a wild ride. Conditions are clean in the mornings, but the sheer size makes it a no-go for most. The wind on the 27th is also a mess.
Tuesday 28th July is a light at the end of the tunnel. The swell drops to 7ft, but the real story is the glassy conditions in the afternoon with a WSW groundswell at 15 seconds. The energy is still strong (2655), and it's a proper, clean wave for experienced surfers.
Wednesday 29th July is the absolute standout of the entire forecast. Morning sees an 8ft SSW groundswell with an 18-second period. That's a long-period groundswell, and at a reef break like Onrus, it's going to dish up some proper, lined-up waves. The energy is massive (4652), and with a light offshore wind, it's going to be clean and perfect. This is a day for the experienced crew to clear their schedules. The afternoon is also glassy with a 8ft SSW swell.
Thursday 30th and Friday 31st trail off into cleaner, smaller conditions. Thursday offers a 7ft SW swell with offshore winds, and Friday sees the swell drop to 4ft, though the wind gets up there.
Bottom line: The first week has plenty of fun, clean waves. The second week is dominated by a massive swell that's too big for the break, but Wednesday 29th July is the one to circle on the calendar. Get on it.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sat afternoon, min 14°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 13°C on Mon night). Winds increasing (calm on Sun night, fresh winds from the NW by Wed morning). | ||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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 11 | SW 10 | SW 10 | SW 10 | SW 9 | W 11 | SW 12 | SW 10 | SW 11 | SW 11 | SW 10 | SW 12 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 |
Wave Graph | |||||||||||||||||||
1149 | 819 | 588 | 369 | 391 | 314 | 410 | 666 | 597 | 629 | 191 | 129 | 207 | 1449 | 2490 | 3010 | 1591 | 1423 | 1447 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | glassy | off | off | cross-off | off | off | cross-on | glassy | cross-off | cross-off | cross-off | cross | cross-off | off | off | off | cross-off |
High Tide | 5:12AM1.52m | 5:38PM1.64m | 5:54AM1.43m | 6:19PM1.56m | 6:36AM1.32m | 7:00PM1.46m | 7:20AM1.21m | 7:44PM1.34m | 8:10AM1.10m | 8:34PM1.23m | 9:16AM1.02m | 9:41PM1.14m | |||||||
Low Tide | 11:12PM0.12m | 11:22AM0.08m | 11:56PM0.18m | 12:01PM0.17m | 00:40AM0.26m | 12:39PM0.28m | 1:24AM0.36m | 1:19PM0.41m | 2:12AM0.46m | 2:05PM0.53m | 3:12AM0.54m | 3:08PM0.63m | 4:32AM0.59m | ||||||
— | 7:46 | — | — | 7:46 | — | — | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:43 | — | — | |
5:51 | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 17 | 15 | 16 | 18 | 16 | 17 | 17 | 15 | 16 | 17 | 15 | 16 | 18 | 15 | 15 | 15 | 15 |
Feels °C | 13 | 16 | 17 | 15 | 15 | 17 | 14 | 14 | 14 | 15 | 15 | 15 | 14 | 15 | 17 | 13 | 9 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 11 | SW 10 | SW 10 | SW 10 | SW 9 | SW 12 | SW 12 | SW 10 | SW 11 | SW 11 | SW 8 | SW 12 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 |
1149 | 819 | 588 | 369 | 391 | 314 | 367 | 666 | 597 | 629 | 191 | 115 | 207 | 1449 | 2490 | 3010 | 1591 | 1423 | 1447 | |
Swell 2 Height (m) Direction Period (s) | E 10 | E 11 | S 14 | S 12 | S 11 | S 11 | S 10 | W 11 | W 11 | W 9 | SW 8 | SW 10 | SW 7 | W 9 | SE 12 | SE 11 | SE 11 | SE 11 | SSW 13 |
9 | 9 | 16 | 77 | 155 | 231 | 221 | 112 | 56 | 60 | 120 | 129 | 44 | 24 | 22 | 60 | 31 | 30 | 60 | |
Swell 3 Height (m) Direction Period (s) | — | — | E 11 | SW 16 | SW 14 | SW 13 | WSW 11 | S 10 | S 10 | S 10 | W 10 | W 10 | SSW 16 | SE 12 | — | — | — | SSW 15 | ESE 11 |
— | — | 9 | 10 | 123 | 269 | 254 | 74 | 49 | 17 | 92 | 68 | 169 | 22 | — | — | — | 43 | 12 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | W 11 | NNW 3 | — | — | — | — | — | — | W 9 | WNW 6 | WNW 8 | W 8 | — |
— | — | — | — | — | — | 410 | 1 | — | — | — | — | — | — | 6 | 293 | 614 | 451 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 4 | 0 | 60 | 199 | 72 | 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.










