
Surf Forecasts:
Knights surf forecast from 19 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 12AM (local time) - 5ft (1.6m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 12PM (local time) - 13ft (4.0m), 14s period, SSW swell with 5,895 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 12AM (local time) - 2.5ft (0.8m), 16s period with SSW swell.
Best Forecast Surf Conditions for Knights this week:
The surf forecast for Knights over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 20) at 12AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.5m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 4.0m 14s and forecast to arrive on Thursday (Jul 23) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Jul 22) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 20th Jul) | 2.5ft (0.8m) 16s |
| Best Surf | 12AM (Tue 21st Jul) | 5ft (1.6m) 14s |
| Most Powerful | 12PM (Thu 23rd Jul) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, let’s get into it. This forecast covers Knights, a beach-and-reef setup that’s exposed and pretty consistent, but it’s an advanced spot – not one for the groms. Crowds are often around, so expect company.
The next couple of days have some nice little windows. Sunday afternoon the 19th we’ve got a 2ft SSW swell rolling in with a 18-second period – that’s proper groundswell, long lines. The wind is light cross-off from the NNW at 6 mph, so the surface is clean. Water temp is sitting at 58.5°F, pretty much average for this time of year. Combined energy is 401 – moderate but not huge. It’s a mellow start, but the quality is there.
Monday the 20th and Tuesday the 21st step it up a notch. Monday morning sees 3.3ft SSW at 16 seconds, same light cross-off – really good shape. By afternoon it’s 3.6ft from the SW, still clean. Tuesday morning pushes 4.9ft SSW at 13 seconds, still with that light cross-off wind. Afternoon drops slightly to 4.6ft SW. All these sessions have combined energy in the 500–800 range, moderate but building. The surf is clean and very good, but not huge.
Then we hit a rough patch. From Wednesday the 22nd through Saturday the 25th, the wind swings onshore or cross-onshore, and the swell jumps up. Wednesday afternoon the 22nd has 7.9ft SW with a period of 12 seconds, but the wind is onshore from the SW at 16 mph – messy. Thursday the 23rd and Friday the 24th see 9.8ft SSW swells, but cross-onshore winds keep it choppy and poor. Combined energy goes through the roof – 3659, 4334, 3728 – that’s strong to very strong energy, but the wind just ruins it. This is not a paddle session; if you’re into kiting, the setup might be more interesting, but for surfing, steer clear.
The standout comes on Sunday the 26th. Morning glass – 3 mph from the west, flat calm. Swell is 6.6ft from the SSW with a 12-second period, combined energy 1087 – moderate but solid. The wind is glassy, the surface is smooth as butter. This is excellent surf for experienced surfers. The size is over 5ft but under 8ft, so it’s doable for advanced crew. Crowds are likely, but with that quality, it’s worth it.
After that, the rest of the week sees a mix. Monday the 27th has 3.3ft SSW at 10 seconds, light cross-off, clean but not as punchy. Tuesday the 28th and Wednesday the 29th are marginal with onshore or cross-shore winds and swell around 7.5–9.8ft, but the quality is questionable. Combined energy stays moderate to strong.
The next standout candidate appears on Monday the 3rd of August – that’s two weeks out, so less certain, but the signs are promising. Morning brings 5.2ft SSW at 16 seconds, almost glassy with a light cross-off from the ENE at 3 mph. Combined energy is 1278 – moderate. That’s another clean, high-quality session for experienced surfers. The period is long, so the waves will have good shape and energy, but at a beach‑and‑reef break like this, that long period can make the sets a bit straight. Still, with the wind so light, it’s worth marking on the calendar.
Overall, there’s a decent run of clean surf early on, a big dirty stretch mid‑week, then a couple of gems – the 26th and the 3rd – that stand out as the
Short Range ForecastSome drizzle, heaviest during Wed morning. Very mild (max 15°C on Mon morning, min 12°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed afternoon. Very mild (max 13°C on Wed afternoon, min 11°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||
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) | SSW 18 | SSW 16 | SSW 16 | SW 15 | SW 14 | SSW 13 | SW 13 | SSW 12 | SW 12 | SW 12 | SSW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 |
Wave Graph | ||||||||||||||||||||
214 | 339 | 519 | 489 | 1016 | 796 | 689 | 488 | 309 | 1547 | 3713 | 3659 | 4334 | 4489 | 3728 | 3334 | 3353 | 2682 | 2366 | 1704 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | on | on | on |
High Tide | 3:24AM0.88m | 3:20PM1.06m | 4:08AM0.94m | 3:29PM1.02m | 4:58AM0.98m | 3:26PM0.99m | 6:05AM1.00m | 11:08AM1.14m | 11:31AM1.23m | 11:46PM0.57m | ||||||||||
Low Tide | 9:45PM0.54m | 8:25AM0.58m | 9:53PM0.52m | 8:53AM0.72m | 10:07PM0.51m | 8:57AM0.86m | 10:26PM0.51m | 8:04AM0.99m | 10:45PM0.53m | 10:29PM0.55m | 9:52PM0.56m | |||||||||
— | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | |
5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 13 |
Feels °C | 11 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 9 | 7 | 5 | 5 | 6 | 7 | 6 | 7 | 9 | 8 | 8 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 16 | SSW 16 | SW 15 | SW 14 | SSW 13 | SW 13 | SSW 12 | SW 12 | — | SSW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 |
95 | 339 | 519 | 489 | 1016 | 796 | 689 | 488 | 309 | — | 3713 | 3659 | 4334 | 4489 | 3728 | 3334 | 3353 | 2682 | 2366 | 1704 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | S 10 | SW 10 | S 10 | — | — | — | — | SSW 14 | — | — | — | — | — | — | — | — | — | — | — |
92 | 54 | 50 | 17 | — | — | — | — | 232 | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SSW 18 | SW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
214 | 73 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | NNW 3 | NW 4 | — | — | WNW 3 | WNW 3 | SW 6 | SW 12 | — | — | — | — | — | — | — | — | — | — |
2 | — | 4 | 7 | — | — | 4 | 6 | 112 | 1547 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 577 | 585 | 570 | 1023 | 1030 | 137 | 578 | 651 | 578 | 1023 | 1034 | 137 |
Best forecast wave conditions in South Australia - East Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Knights Surf forecast
The above surf forecast table for Knights provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Knights can be found by selecting the local surf guide option on the grey menu. Our Knights 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 (Knights) 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 Knights 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.










