Surf Forecasts:
Knights surf forecast from 21 Aug 2026:
- Best quality surf: Thursday 27 Aug, 9PM (local time) - 7ft (2.2m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 6PM (local time) - 8ft (2.5m), 15s period, SSW swell with 3,051 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 9PM (local time) - 8ft (2.5m), 15s 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 Saturday (Aug 22) at 9PM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 0.6m and 20s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 2.5m 15s and forecast to arrive on Saturday (Aug 22) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 25) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 22nd Aug) | 8ft (2.5m) 15s |
| Best Surf | 9PM (Thu 27th Aug) | 7ft (2.2m) 18s |
| Most Powerful | 6PM (Sat 22nd Aug) | 8ft (2.5m) 15s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
G’day, it’s Rusty here, and I’ve been glued to the charts for the next fortnight. There’s a bit of a slow start, but the ocean’s got some decent pulses lined up for us. The key is picking your moments, ‘cause there’ll be plenty of onshore junk to sift through, especially if you’re keen on Knights.
The first couple of days are a washout, to be honest. Saturday and Sunday morning are the only real options to start, but they’re messy. Saturday’s got an 8ft SSW swell, but it’s cross-on and choppy – not worth getting wet for. Sunday morning cleans up a bit with some offshore wind, dropping to 7ft, and that’s your first real chance for a surf. The energy is solid at (2626), so there’s some push behind it. This is a beach and reef set-up, so with a period around 14 seconds, it should be handling that size okay, but it’s for the advanced crew only.
Then we hit a bit of a lull. Monday the 24th has small, clean waves in the 5-5ft range, but the swell energy is weak, around (997). Not terrible, but not a standout. After that, the wind turns onshore and it gets ugly. Tuesday the 25th and Wednesday the 26th are blown out with SSW winds. Forget it. Thursday the 27th has clean conditions but the swell is only 4ft, and the period jumps to 19 seconds – that’s a very long period groundswell, and on a beach/reef break that can make things a bit too walled. It’s rideable, but not epic.
The first real standout is Sunday the 30th, but it’s a beast. The swell is predicted to hit 12ft with a long 18-second period, and the energy is enormous at (7495). The problem is, it’s just too big for this break. The wind and tide are favorable, but it’s only for experts, and even then, it’s a serious paddle. That’s the ‘too big’ caveat – I’d give that one a miss unless you’re genuinely charging.
After that, it settles back down. Monday the 31st has 8ft SSW swell, but the wind is a cross-shore blowing – it’s a bit average. The week rolls on with some clean mornings, particularly Wednesday the 2nd of September and Thursday the 3rd. Thursday morning looks sweet: 5ft of SSW swell, light offshore northerly wind, and clean conditions. The energy is moderate at (1432), but it’ll be fun, clean surf for the experienced.
The true highlight of the whole run looks like Friday the 4th of September. It’s not a huge swell, but it’s a solid 8ft coming from the SSW with a 14-15 second period. The morning has a slight cross-onshore breeze that might put a ripple on it, but the energy is strong at (2460). It’s pushing some good power. The next morning, Saturday the 5th, is also worth a look: 6ft of SSW swell with a light cross-offshore wind, clean again, and rated as excellent for experienced surfers. That’s a solid run there.
For the record, the water temp is sitting about average for this time of year, so it’s not a shocker when you hit the water.
So, if you’re picking your days, circle Thursday the 3rd and early Saturday the 5th for the cleanest rides. The big one on Sunday the 30th is a spectacle, but leave it to the heroes. The long-range stuff in the second week is promising but less certain – forecasts can change, so keep an eye out.
Anyway, I’ll be down there. See you in the water.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 17°C on Sun morning, min 11°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Mon night. Very mild (max 18°C on Thu afternoon, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 11 | SSW 14 | SSW 19 | WSW 17 |
Wave Graph | |||||||||||||||||||
2785 | 2837 | 2445 | 2736 | 1867 | 2479 | 1537 | 982 | 754 | 669 | 787 | 1240 | 1454 | 880 | 787 | 335 | 763 | 1255 | 2998 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-off | off | cross | off | off | cross-off | off | on | on | on | on | cross-on | cross-off | cross-off | cross-off | cross-on |
High Tide | 6:12AM0.99m | 11:23AM1.13m | 11:44AM1.18m | 00:40AM0.59m | 12:05PM1.20m | 00:37AM0.61m | 12:27PM1.20m | 00:45AM0.65m | 12:49PM1.19m | 00:59AM0.70m | |||||||||
Low Tide | 7:35AM0.99m | 9:02PM0.45m | 8:54PM0.45m | 8:42PM0.45m | 8:26PM0.43m | 4:30AM0.48m | 8:08PM0.40m | 5:20AM0.39m | 7:54PM0.38m | ||||||||||
— | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | |
— | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | — | — | 4 | 10 | 1 | 1 | — | — | — | — | — | — | 4 |
Temp °C | 14 | 15 | 15 | 12 | 17 | 17 | 14 | 16 | 14 | 13 | 14 | 14 | 13 | 14 | 14 | 11 | 17 | 18 | 16 |
Feels °C | 11 | 12 | 13 | 11 | 15 | 15 | 12 | 14 | 13 | 12 | 9 | 10 | 9 | 12 | 12 | 9 | 12 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 11 | SSW 14 | SW 14 | SSW 17 |
2785 | 2837 | 2445 | 2736 | 1867 | 2479 | 1537 | 982 | 754 | 669 | 787 | 1240 | 1454 | 880 | 787 | 335 | 763 | 787 | 2998 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 24 | SSW 21 | SSW 19 | SSW 18 | — | — | SW 20 | SW 20 | SW 18 | SSW 16 | WSW 15 | WSW 14 | SSW 18 | SW 17 | SSW 15 | SW 22 | SSW 19 | WSW 17 |
— | 54 | 302 | 774 | 759 | — | — | 15 | 15 | 81 | 759 | 252 | 545 | 31 | 75 | 154 | 229 | 1255 | 2987 | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 21 | — | — | — | — | — | — | SW 18 | SSW 16 | — | — | — | — | S 24 | — | — | — |
— | — | 117 | — | — | — | — | — | — | 81 | 339 | — | — | — | — | 11 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NE 3 | NE 3 | ENE 4 | ESE 4 | SE 4 | — | — | — | — | NNW 3 | NW 4 | WSW 4 |
— | — | — | — | — | — | — | 2 | 1 | 16 | 13 | 16 | — | — | — | — | 2 | 12 | 36 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 2 | 157 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 484 | 532 | 137 | 33 | 5 | 0 | 1 | 2 | 2 |
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.











