Surf Forecasts:
Onrus surf forecast from 19 Jul 2026:
- Best quality surf: Thursday 23 Jul, 8PM (local time) - 11ft (3.5m), 17s period, SW swell with cross-onshore winds.
- Most powerful swell: Thursday 23 Jul, 11PM (local time) - 13ft (4.0m), 17s period, SW swell with 8,305 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 8PM (local time) - 8ft (2.4m), 10s 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 19) at 8PM. The primary swell is predicted to be 2.4m and 10s period with a secondary swell of 0.6m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Onrus in the next 16 days are 4.0m 17s and forecast to arrive on Thursday (Jul 23) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Wednesday (Jul 22) at 8PM.
| Wave Type | Time (SAST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 19th Jul) | 8ft (2.4m) 10s |
| Best Surf | 8PM (Thu 23rd Jul) | 11ft (3.5m) 17s |
| Most Powerful | 11PM (Thu 23rd Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Onrus over the next 16 days.
The Lowdown
Alright, let’s talk about Onrus. This is a reef break that’s inconsistent, so when it lights up you’ve got to pay attention. The water temp is sitting at 59.9°F, which is right on the money for this time of year – no anomaly to speak of. The optimum swell direction is from the southwest, and that’s exactly what we’re seeing for most of the forecast.
We’ve got a mixed bag over the next couple of weeks. The first few days are a bit average with a cross-off or onshore wind and moderate energy, but there are a couple of sessions that stand out as proper quality.
Tuesday morning, July 21 – that’s the one. Glassy as a mirror, 7.5 ft SW swell with a 14-second period, and the combined energy reading is 2083 – that’s solid moderate-to-strong power. The conditions are rated excellent for experienced surfers, and with offshore wind from the ENE, it’s going to be clean as a whistle. The reef will handle that long-period groundswell beautifully. It’s a bit on the bigger side – over 8 ft? Nah, but for intermediates who are comfortable it’s a dream. Just keep in mind that Onrus can get crowded sometimes, so expect company.
Thursday morning, July 23 is another good shout – 7.9 ft SW, 11-second period, combined energy 1381, and a light cross-off wind from the west. Clean again. That’s still excellent for experienced surfers, and the energy is there but not overwhelming.
Friday, July 24 morning gets a massive 9.8 ft SW swell with 14 seconds and energy hitting 4213 – that’s strong wave energy. But the word is it’s predicted to be too big for this break. The wind is light cross-onshore, so it’s not clean. I’d give that one a miss.
Tuesday afternoon, July 28 – glassy again, 5.2 ft SW with a 14-second period, energy 1756. That’s an excellent session for experienced surfers. The wind is dead calm from the SSW. Perfect conditions for a reef with a long-period groundswell like that.
Saturday, August 1 – both morning and afternoon are glassy. The morning has 4.3 ft SW, 12 seconds,
Short Range ForecastSome drizzle, heaviest during Sun afternoon. Very mild (max 16°C on Sun morning, min 11°C on Tue night). Winds decreasing (fresh winds from the WNW on Sun afternoon, calm by Tue morning). | Days 4-6 Weather SummarySome drizzle, heaviest during Thu morning. Very mild (max 16°C on Fri afternoon, min 10°C on Thu night). Winds decreasing (fresh winds from the WNW on Wed afternoon, calm by Thu afternoon). | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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) | WSW 12 | WSW 9 | SW 11 | SW 9 | SW 9 | SSW 16 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 12 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 902 | 1088 | 1168 | 502 | 243 | 314 | 2037 | 2172 | 1619 | 1150 | 1013 | 836 | 1371 | 1818 | 7862 | 4193 | 2862 | 2609 | 2187 | 1670 | 1150 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | glassy | cross-off | off | glassy | on | cross | cross-off | off | off | cross-off | on | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 7:00PM1.46m | 7:20AM1.21m | 7:44PM1.34m | 8:10AM1.10m | 8:34PM1.23m | 9:16AM1.02m | 9:41PM1.14m | 10:45AM1.00m | 11:04PM1.11m | 12:12PM1.04m | 00:20AM1.14m | 1:12PM1.12m | 1:16AM1.21m | ||||||||
Low Tide | 12:39PM0.28m | 1:24AM0.36m | 1:19PM0.41m | 2:12AM0.46m | 2:05PM0.53m | 3:12AM0.54m | 3:08PM0.63m | 4:32AM0.59m | 4:43PM0.67m | 5:58AM0.57m | 6:16PM0.65m | 7:01AM0.50m | 7:17PM0.57m | ||||||||
 |  |  |  |  | | | |  | | | | | | | | | | | | | |
 | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:43 | — | — | 7:43 | — | — | 7:43 | — | — | 7:41 | — | — |
 | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 14 | 15 | 16 | 14 | 14 | 15 | 13 | 14 | 15 | 13 | 13 | 13 | 12 | 14 | 16 | 14 | 13 | 16 | 12 |
Feels °C | 11 | 10 | 11 | 14 | 14 | 13 | 13 | 13 | 11 | 10 | 9 | 7 | 9 | 13 | 10 | 12 | 14 | 13 | 10 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | W 11 | SSE 10 | SW 11 | SW 9 | SW 11 | SW 8 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 12 | SW 16 | SW 14 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 |
| kJ | 83 | 19 | 1168 | 502 | 140 | 96 | 2037 | 2172 | 1619 | 1150 | 1013 | 836 | 1371 | 1818 | 7862 | 4193 | 2862 | 2609 | 2187 | 1670 | 1150 |
Swell 2 Height (m) Direction Period (s) | S 10 | SE 9 | SE 10 | W 10 | W 10 | SSW 16 | W 9 | SE 12 | ESE 11 | SSW 15 | SSW 13 | SSW 12 | SE 13 | SW 19 | SE 12 | SE 11 | SSW 17 | ESE 11 | SSW 13 | — | SSW 12 |
| kJ | 52 | 13 | 23 | 45 | 45 | 314 | 25 | 21 | 78 | 21 | 120 | 59 | 7 | 290 | 35 | 20 | 197 | 11 | 817 | — | 206 |
Swell 3 Height (m) Direction Period (s) | — | E 10 | SSE 9 | SE 9 | SW 18 | SW 12 | SE 12 | W 9 | — | SE 12 | SE 11 | SE 13 | SE 8 | SE 12 | — | — | — | — | ESE 11 | — | — |
| kJ | — | 2 | 17 | 13 | 80 | 93 | 21 | 14 | — | 5 | 5 | 7 | 3 | 6 | — | — | — | — | 11 | — | — |
Wind waves Height (m) Direction Period (s) | WSW 12 | WSW 9 | — | — | SW 9 | — | — | — | — | — | W 4 | NW 4 | — | — | — | — | — | — | — | SE 4 | ESE 4 |
| kJ | 902 | 1088 | — | — | 243 | — | — | — | — | — | 13 | 19 | — | — | — | — | — | — | — | 8 | 28 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 60 | 60 | 0 | 0 | 8 | 0 | 0 | 23 | 10 | 31 | 60 | 0 | 0 | 10 | 30 | 10 | 23 | 10 | 10 | 40 | 23 |
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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