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 5,584 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 1.9m 6s 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 do this in feet and Fahrenheit for my imperial crew.
We’re lookin’ at Onrus, a reef break that’s all about the SW groundswell, but she’s inconsistent – only lights up when the stars align. Water temp’s about what you’d expect for now, no wild swings.
Kickin’ off Sunday the 26th July – glassy morning, clean 7ft SW swell at 12 seconds. The energy’s kickin’ at 1358 – that’s solid. This one’s for experienced surfers only. Afternoon turns cross-on with a light breeze, still okay but not perfect.
Monday the 27th goes downhill fast. Morning’s got a 8ft SW swell but blowin’ onshore at 15 mph, and afternoon gets worse – 10ft and 30 mph onshore. The energy numbers (3727 and 5584) are high but the quality is garbage. Tuesday and Wednesday are mostly messy with strong cross-onshore winds. But Wednesday afternoon gives a glimmer – glassy again, 5ft SW at 13 seconds, energy down to 841. It’s a ‘very good’ call, and with flat wind you could sneak a session, but it’s not the main event.
Thursday’s marginal, Friday’s poor. Saturday the 1st of August is quiet until the afternoon – glassy, 4ft SW, 13 seconds, low energy at 382. It’s okay but small.
The real deal starts Sunday the 2nd of August. Morning brings a 4ft SW swell but with a 19-second period. That’s a crazy long groundswell – on this reef it’s gonna be some proper beauties. Wind is clean cross-off, energy at 1583. Afternoon is the gold: glassy, 7ft SW, 17 seconds, energy jumps to 2683. Crowds are ‘sometimes’ so you might have it mostly to yourself.
Monday the 3rd and Tuesday the 4th of August keep it clean – cross-off winds, 6ft to 7ft SW, periods around 13-14 seconds, energy from 1295 to 1594. All ‘excellent’ for experienced surfers. The 7th and 8th of August see a massive spike – up to 15ft SW swell and energy of 12,874. That’s extreme, and with clean conditions – but that’s expert-only territory, too big for the reef.
The back end, 9th and 10th of August, drops to a manageable 6ft to 8ft, with clean cross-off and glassy. The 10th Monday morning is glassy with an 8ft W groundswell at 11 seconds and energy at 1806 – another solid bet for experienced surfers.
So, the first few days are a write-off. But from Sunday the 2nd to Tuesday the 4th of August, that’s your window. And the 10th looks promising too. Onrus is a fickle reef, but when it’s on, it’s worth the wait.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon afternoon. Very mild (max 19°C on Sun morning, min 13°C on Sat night). Winds increasing (calm on Sun morning, strong winds from the E by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Fri afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the E on Tue night, calm by Wed afternoon). | ||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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 13 | SW 17 | SSW 17 | SSW 15 | SW 14 | SSW 14 | SW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 1539 | 1040 | 778 | 1259 | 3727 | 5584 | 4015 | 2263 | 2635 | 1280 | 1014 | 841 | 809 | 809 | 767 | 643 | 373 | 319 | 220 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | glassy | glassy | cross-on | on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 7:46AM0.42m | 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 | — | — | 7:39 | — | — | 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 | 19 | 18 | 14 | 16 | 14 | 13 | 15 | 16 | 13 | 14 | 19 | 17 | 16 | 17 | 14 | 15 | 20 | 15 |
Feels °C | 13 | 17 | 16 | 13 | 13 | 8 | 7 | 8 | 8 | 6 | 10 | 18 | 16 | 14 | 13 | 11 | 10 | 16 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 13 | SW 17 | SSW 17 | SSW 15 | SW 14 | SSW 14 | SW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 |
| kJ | 1539 | 1040 | 778 | 1259 | 3727 | 5584 | 4015 | 2263 | 2635 | 1280 | 1014 | 841 | 809 | 809 | 767 | 643 | 373 | 319 | 220 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | SW 15 | SW 14 | SW 16 | — | — | — | — | — | S 11 | — | — | SE 8 | ESE 8 | — | — | SE 8 | SE 9 | SE 10 |
| kJ | 10 | 318 | 390 | 274 | — | — | — | — | — | 3 | — | — | 14 | 6 | — | — | 53 | 46 | 61 |
Swell 3 Height (m) Direction Period (s) | — | ESE 10 | ESE 10 | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 18 | WSW 16 |
| kJ | — | 10 | 9 | 57 | — | — | — | — | — | — | — | — | — | — | — | — | — | 12 | 25 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SE 7 | SE 7 | ESE 6 | E 4 | E 7 | ESE 7 | — | ESE 8 | SE 4 | ESE 4 | NE 3 | E 2 | — |
| kJ | — | — | — | — | — | — | 489 | 189 | 277 | 36 | 212 | 139 | — | 98 | 11 | 13 | 2 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 0 | 4 | 4 | 10 | 247 | 86 | 45 | 86 | 23 | 10 | 0 | 0 | 4 | 4 | 23 | 23 | 4 | 10 |
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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