Surf Forecasts:
Onrus surf forecast from 25 Jul 2026:
- Best quality surf: Sunday 26 Jul, 11AM (local time) - 6.5ft (2.0m), 12s period, SW swell with glassy winds.
- Most powerful swell: Monday 27 Jul, 5PM (local time) - 10ft (3.0m), 17s period, SSW swell with 5,343 kJ wave energy.
- Next surfable swell (1★+): Sunday 26 Jul, 11AM (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 Sunday (Jul 26) at 11AM. The primary swell is predicted to be 2.0m and 12s period with a secondary swell of 0.9m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 3.0m 17s and forecast to arrive on Monday (Jul 27) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 7s period and expected on Tuesday (Jul 28) at 5PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sun 26th Jul) | 6.5ft (2.0m) 12s |
| Best Surf | 11AM (Sun 26th Jul) | 6.5ft (2.0m) 12s |
| Most Powerful | 5PM (Mon 27th Jul) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let’s break down what’s coming at Onrus. It’s a reef break that’s exposed to SW swell, and it’s inconsistent – doesn’t always light up. Water temp is around 60°, right on the average for the year.
We’re starting with a bit of a wait. Saturday the 25th has 8ft SW swell, but it’s cross-on and lumpy. Not your day. Sunday the 26th morning is where it gets good. Glassy conditions with a light 5 km/h ESE breeze, and a clean 7ft SW swell at 12 seconds. That’s a proper groundswell on a reef – long-period, good shape. It’s a standout for experienced surfers, but crowds do turn up here sometimes.
Monday the 27th turns ugly. The swell pushes to 8ft and 10ft, but the wind gets strong onshore – 30 km/h in the afternoon – and it’s blown out. Tuesday the 28th is similar, big swell with fresh cross-onshore winds. More of a kite day than a paddle day.
Mid-week gets smaller. Wednesday the 29th through Thursday the 30th has 5-5ft swell but the wind stays cross-on, so only marginal. Friday the 31st morning brings a clean offshore WNW breeze at 10 km/h with a dropping 4ft SW swell. Small, but clean – good for a longboard.
Now the first week of August has the real gems. Saturday the 1st morning is glassy with 4ft swell – small but clean. Sunday the 2nd morning is glassy again, 4ft SW at 12 seconds – very good. Monday the 3rd has 6ft SW groundswell at 13 seconds with cross-off winds, clean and lined up. Tuesday the 4th morning is glassy with 5ft SW at 12 seconds – another standout for experienced surfers.
Then it gets big again. Wednesday the 5th afternoon has 10ft WSW swell, but it’s onshore and way too big for this reef. Thursday the 6th afternoon eases to 8ft SW at 13 seconds with clean cross-off winds, and that’s excellent for experienced surfers. Saturday the 8th afternoon is glassy with 7ft SW at 13 seconds – another excellent window.
So the best bets: Sunday 26th morning, Tuesday 4th morning, Thursday 6th afternoon, and Saturday 8th afternoon. Those are the clean ones with proper groundswell. The rest gets blown out or is too big.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon afternoon. Very mild (max 18°C on Sat afternoon, min 13°C on Sat morning). Winds increasing (calm on Sun morning, fresh winds from the E by Mon night). | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Thu afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the E on Tue afternoon, light winds from the NE by Wed night). | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
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 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 17 | SSW 17 | SSW 15 | SW 15 | SSW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2000 | 1789 | 1539 | 1040 | 778 | 1210 | 3727 | 5343 | 3828 | 2449 | 3078 | 1358 | 905 | 809 | 649 | 585 | 701 | 623 | 455 | 386 | 293 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | glassy | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-on | cross-on | cross-off | off | cross-off | off |
High Tide | 1:12PM1.12m | 1:16AM1.21m | 1:55PM1.21m | 1:58AM1.29m | 2:31PM1.31m | 2:34AM1.36m | 3:04PM1.39m | 3:07AM1.42m | 3:34PM1.47m | 3:39AM1.46m | 4:04PM1.53m | 4:10AM1.48m | 4:34PM1.57m | 4:41AM1.47m | |||||||
Low Tide | 7:17PM0.57m | 7:46AM0.42m | 8:01PM0.49m | 8:23AM0.33m | 8:37PM0.40m | 8:55AM0.25m | 9:10PM0.33m | 9:24AM0.19m | 9:42PM0.28m | 9:52AM0.14m | 10:12PM0.24m | 10:20AM0.12m | 10:43PM0.22m | ||||||||
 | |  | | |  |  |  | | | | | | | | | | | | | | |
 | 7:41 | — | — | 7:41 | — | — | 7:41 | — | — | 7:39 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — |
 | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 18 | 15 | 18 | 18 | 14 | 15 | 14 | 14 | 15 | 17 | 13 | 15 | 20 | 18 | 20 | 23 | 21 | 19 | 21 | 16 |
Feels °C | 12 | 16 | 12 | 16 | 16 | 13 | 12 | 9 | 8 | 8 | 9 | 6 | 12 | 18 | 16 | 17 | 20 | 19 | 17 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 17 | SSW 17 | SSW 15 | SW 15 | SSW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 |
| kJ | 2000 | 1789 | 1539 | 1040 | 778 | 1210 | 3727 | 5343 | 3828 | 2449 | 3078 | 1358 | 905 | 809 | 649 | 585 | 701 | 623 | 455 | 386 | 293 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | ESE 11 | ESE 10 | SW 15 | SW 14 | SW 16 | — | — | — | — | — | — | S 11 | SE 7 | SE 9 | ESE 10 | S 10 | ESE 10 | SE 11 | SE 10 | SE 11 |
| kJ | 378 | 11 | 10 | 318 | 331 | 274 | — | — | — | — | — | — | 2 | 18 | 20 | 10 | 17 | 11 | 41 | 54 | 43 |
Swell 3 Height (m) Direction Period (s) | SE 11 | — | — | ESE 10 | ESE 10 | WSW 12 | — | — | — | — | — | — | — | — | — | S 10 | ESE 10 | S 9 | S 10 | SW 16 | SW 15 |
| kJ | 30 | — | — | 10 | 9 | 82 | — | — | — | — | — | — | — | — | — | 18 | 10 | 6 | 2 | 10 | 57 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 7 | SE 7 | ESE 7 | E 4 | ESE 6 | ESE 8 | — | — | ESE 9 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 466 | 215 | 378 | 36 | 29 | 183 | — | — | 168 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 23 | 10 | 0 | 4 | 4 | 23 | 245 | 45 | 45 | 40 | 23 | 10 | 4 | 4 | 4 | 4 | 0 | 0 | 31 | 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.
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