Surf Forecasts:
Onrus surf forecast from 2 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with offshore winds.
- Most powerful swell: Saturday 8 Aug, 8PM (local time) - 23ft (7.0m), 15s period, SW swell with 22,790 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 8AM (local time) - 3.5ft (1.1m), 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 Sunday (Aug 02) at 8AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.3m and 9s. 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 7.0m 15s and forecast to arrive on Saturday (Aug 08) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Friday (Aug 07) at 11PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 2nd Aug) | 3.5ft (1.1m) 13s |
| Best Surf | 8PM (Wed 5th Aug) | 10ft (3.0m) 14s |
| Most Powerful | 8PM (Sat 8th Aug) | 23ft (7.0m) 15s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let’s switch to feet and miles. It’s Rusty here, looking at Onrus (reef). Water temp is 60°F, which is right about normal for this time of year – nothing unusual.
First real surf comes Sunday morning, 2nd August. Glassy, clean as can be, with a 4ft swell from the SW, period about 13 seconds. That’s a solid groundswell, and the combined energy is moderate (479). Onrus is inconsistent, so don’t expect non-stop, but the quality will be there.
Monday 3rd - morning is the call. Glassy, 5ft SW swell, 13-second period, energy up to 747. Clean and punchy. Afternoon gets a light cross-onshore, so stick to the morning.
Tuesday 4th stays clean with cross-off winds, 5ft SW swell, period drops to 11 seconds – still good, but less push (451 energy).
Then it gets big. Wednesday 5th afternoon – 8ft from the WSW, 15-second period, offshore winds at 18 mph. Strong energy (3086). That’s for experts only. Clean and powerful.
Thursday 6th – morning is 10ft – too big. Afternoon drops to 8ft with glass – good for experts (2803 energy). Friday 7th morning is another 10ft – too big. Afternoon is 8ft but with fresh cross-off wind.
Saturday 8th – huge: 21ft morning, 23ft afternoon, both from the SW with 14-15 second periods. Extreme energy (17,081 and 22,414). Only the best. Sunday 9th is messy and big – leave it.
Monday 10th comes back: 7ft from the S with offshore wind in the morning, 6ft in the afternoon with clean conditions. Good for experienced surfers.
Tuesday 11th and Wednesday 12th are windy and bumpy – skip them. Thursday 13th has a very long 18-second swell, but onshore winds spoil it. Friday 14th is blown out.
Saturday 15th – clean again: 6ft from the WSW, cross-off wind, moderate energy (1278). Nice session. Sunday 16th – standout. Glassy, 8ft from the SW, 15-second period, strong energy (3158). Epic for experts.
Monday 17th – glassy, 8ft from the WSW, 12-13 second period, moderate-strong energy. Another excellent session.
Best bets? Monday 3rd morning for the sweet spot of size (5ft), clean glass, and good period (13s). And Sunday 16th morning for the power (8ft, 15s, glass) – that’s for the experienced crew.
Onrus is inconsistent, so don’t expect a lineup full of waves, but when it hits, it’s quality. Crowds can show up sometimes.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sun afternoon, min 14°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Thu morning. Very mild (max 18°C on Wed morning, min 10°C on Thu night). Winds decreasing (fresh winds from the WNW on Wed afternoon, calm by Thu afternoon). | ||||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | |||||||||||||||
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 13 | SW 13 | WSW 13 | SW 12 | SW 11 | SW 11 | SW 14 | SW 16 | WSW 15 | SW 13 | SW 13 | SW 12 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 473 | 386 | 609 | 639 | 402 | 614 | 439 | 292 | 206 | 1634 | 3072 | 3788 | 2752 | 2010 | 3813 | 3009 | 2484 | 1360 | 17081 | 22414 | 17575 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | off | off | cross-on | glassy | cross-on | cross-off | cross-off | off | cross-off | cross-off | cross-on |
High Tide | 5:34PM1.57m | 5:47AM1.39m | 6:08PM1.53m | 6:26AM1.32m | 6:48PM1.46m | 7:13AM1.23m | 7:37PM1.37m | 8:16AM1.13m | 8:47PM1.27m | 9:48AM1.08m | 10:22PM1.23m | 11:33AM1.12m | 11:57PM1.28m | ||||||||
Low Tide | 11:17AM0.16m | 11:47PM0.23m | 11:49AM0.22m | 00:25AM0.27m | 12:25PM0.30m | 1:09AM0.33m | 1:10PM0.39m | 2:06AM0.41m | 2:11PM0.50m | 3:28AM0.47m | 3:45PM0.57m | 5:11AM0.46m | 5:37PM0.54m | ||||||||
 | |  | | | | | | | | |  |  |  | |  |  | | | |  | |
 | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — |
 | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 5 | 10 | 1 | — | — | — | 1 | 1 | 2 | — |
Temp °C | 21 | 22 | 18 | 19 | 20 | 18 | 18 | 18 | 16 | 18 | 18 | 15 | 12 | 13 | 13 | 14 | 16 | 14 | 14 | 13 | 11 |
Feels °C | 18 | 18 | 17 | 18 | 18 | 16 | 16 | 16 | 16 | 13 | 12 | 12 | 10 | 12 | 11 | 13 | 12 | 9 | 6 | 4 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 13 | SW 13 | WSW 13 | SW 12 | SW 11 | SW 11 | SW 10 | SW 16 | WSW 15 | SW 13 | SW 13 | SW 12 | SW 14 | SW 14 | SW 14 | SW 13 | — | — | SW 15 |
| kJ | 473 | 386 | 609 | 639 | 402 | 614 | 439 | 292 | 170 | 1634 | 3072 | 3788 | 2752 | 2010 | 3813 | 3009 | 2484 | 1360 | — | — | 17575 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | SW 16 | SE 14 | WSW 15 | SW 13 | ESE 11 | ESE 11 | SW 16 | SW 14 | ESE 10 | ESE 10 | ESE 10 | SW 19 | SW 17 | ESE 9 | E 10 | E 10 | E 10 | — | — | — |
| kJ | 10 | 122 | 30 | 85 | 357 | 12 | 12 | 40 | 206 | 56 | 33 | 33 | 133 | 793 | 17 | 7 | 7 | 7 | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 9 | ESE 10 | SE 14 | SE 12 | ESE 12 | S 14 | SW 18 | WSW 11 | W 10 | — | — | — | ESE 10 | ESE 10 | — | — | — | — | — | — | — |
| kJ | 6 | 10 | 46 | 23 | 13 | 4 | 12 | 12 | 51 | — | — | — | 18 | 18 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 4 | W 9 | — | — | — | — | — | — | W 7 | SW 14 | SW 15 | — |
| kJ | — | — | — | — | — | — | — | — | — | 42 | 14 | — | — | — | — | — | — | 532 | 17081 | 22414 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 4 | 4 | 0 | 0 | 0 | 8 | 72 | 25 | 17 | 0 | 10 | 10 | 72 | 17 | 1188 | 1372 | 35 |
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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