Surf Forecasts:
Knights surf forecast from 24 Aug 2026:
- Best quality surf: Sunday 30 Aug, 6PM (local time) - 10ft (3.0m), 19s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 30 Aug, 6PM (local time) - 10ft (3.0m), 19s period, SSW swell with 5,641 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 6PM (local time) - 5ft (1.5m), 13s 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 Wednesday (Aug 26) at 6PM. The primary swell is predicted to be 1.5m and 13s period with a secondary swell of 0.6m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 3.0m 19s and forecast to arrive on Sunday (Aug 30) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Sep 01) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 26th Aug) | 5ft (1.5m) 13s |
| Best Surf | 6PM (Sun 30th Aug) | 10ft (3.0m) 19s |
| Most Powerful | 6PM (Sun 30th Aug) | 10ft (3.0m) 19s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, let’s take a look at what’s coming. The ocean’s been stirred up, but it’s been an ugly start. Tuesday the 25th is a total washout – rain showers, onshore wind howling, and a lumpy 8ft of slop. Don’t bother paddling out. You’re looking at a couple days of nothing.
Wednesday the 26th is still average. Swell drops to 6ft and the wind’s light cross-onshore, making small ripples. Marginal surf – only if you’re really keen.
Thursday the 27th starts to clean up. Swell settles to 4ft from the SSW with a 14-second period, wind goes cross-offshore, so the lines are getting clean. Better, but not special.
Friday the 28th is where it fires. Morning is nearly glassy, wind light from the north, and a solid 6ft SSW groundswell with a long 17-second period. Combined energy is into the moderate-strong range (1848). This is excellent for experienced surfers – deep, lined-up waves with good energy and nice lulls between sets. Afternoon stays clean with a light cross-off.
Saturday the 29th and Sunday the 30th back off a bit – 4ft to 5ft of SSW swell, clean mornings, but the afternoons get a little cross-chop. Still fun, but Friday is your best bet in this first stretch.
Now, get ready – Monday the 31st is the standout. A 10ft SSW groundswell, 17-second period, combined energy of 4409, and nearly glassy in the morning. That’s a big, clean, powerful swell. This break (Knights) is a beach and reef setup, and with that long-period groundswell, it’s going to jack up on the reef and could be pitching. Experts only.
Tuesday the 1st of September eases to 5ft of SSW groundswell, and the afternoon turns glassy again – another excellent session. Wednesday the 2nd holds at 6ft with 16-second period and clean offshore winds in the afternoon. Another good day for the crew who know their stuff.
Thursday the 3rd and Friday the 4th stay between 5ft and 7ft of clean SSW – Friday afternoon is excellent with light cross-off winds and energy around 1934. More great waves for experienced surfers.
Saturday the 5th gets messy – 10ft SSW in the morning but the wind picks up, and by afternoon it’s onshore and ugly. Sunday the 6th sees 13ft – combined energy up to 6957 – but it’s just too big for this spot. Monday the 7th hits 15ft with very strong energy (10645) – massive and clean but only for the very best.
After that, Tuesday the 8th and Wednesday the 9th drop back but the wind turns onshore and it gets lumpy. Decent swell size but poor quality.
The clear standout: Monday the 31st of August at *Knights*, with the glassy morning, 10ft of long-period SSW, and clean conditions. That’s the one to circle. If you miss that, Friday the 28th is your next best – 6ft, glassy start, long period. Everything else is fun but not epic. Crowds? This spot gets busy often, so get there early.
Water temp is about average for the time of year – nothing unusual.
Stay safe out there.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue morning. Very mild (max 16°C on Thu morning, min 11°C on Tue night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Fri morning, min 10°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | SSW 14 | SSW 14 | SW 14 | SSW 13 | SSW 13 | SSW 11 | SSW 14 | SW 14 | SW 18 | SSW 17 | SW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 20 | SSW 20 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph | |||||||||||||||||||||
2629 | 2573 | 2356 | 1100 | 914 | 492 | 603 | 681 | 926 | 2027 | 1611 | 1209 | 886 | 680 | 551 | 441 | 4535 | 4868 | 3263 | 2615 | 1568 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | glassy | cross-off | cross-on | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 12:05PM1.20m | 00:37AM0.61m | 12:27PM1.20m | 00:45AM0.65m | 12:49PM1.19m | 00:59AM0.70m | 1:11PM1.16m | 1:17AM0.77m | 1:33PM1.12m | 1:37AM0.86m | 1:53PM1.06m | 2:01AM0.95m | 2:12PM1.00m | 2:28AM1.04m | |||||||
Low Tide | 8:26PM0.43m | 4:30AM0.48m | 8:08PM0.40m | 5:20AM0.39m | 7:54PM0.38m | 6:00AM0.31m | 7:49PM0.36m | 6:35AM0.27m | 7:49PM0.35m | 7:09AM0.27m | 7:52PM0.34m | 7:43AM0.31m | 7:55PM0.34m | ||||||||
6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | |
— | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 12 | 14 | 13 | 11 | 16 | 16 | 15 | 16 | 16 | 14 | 15 | 14 | 12 | 15 | 16 | 14 | 18 | 18 | 17 |
Feels °C | 9 | 8 | 9 | 12 | 12 | 9 | 13 | 13 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 12 | 14 | 11 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 11 | SSW 14 | SW 14 | SW 18 | SSW 17 | SW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 20 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
1623 | 1979 | 2356 | 1100 | 914 | 492 | 603 | 681 | 926 | 2017 | 1611 | 1209 | 886 | 680 | 551 | 440 | 4535 | 4868 | 3263 | 2615 | 1568 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | — | — | SSW 18 | SSW 16 | SSW 16 | SW 22 | SW 20 | SW 13 | SSW 16 | SSW 16 | WSW 15 | — | SSW 23 | SSW 21 | SSW 20 | — | — | — | — | — |
508 | — | — | 31 | 53 | 94 | 118 | 309 | 501 | 2027 | 1415 | 851 | — | 52 | 178 | 441 | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 24 | — | — | SSE 8 | — | — | — | — | S 20 | — | SSW 16 | — | — | — | — | — |
— | — | — | — | — | 22 | — | — | 6 | — | — | — | — | 8 | — | 208 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | — | — | — | N 2 | — | — | — | — | S 4 | — | — | SE 3 | — | — | — | — | — | N 3 |
2629 | 2573 | 1797 | — | — | — | 1 | — | — | — | — | 7 | — | — | 3 | — | — | — | — | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 394 | 137 | 137 | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 157 | 0 | 0 | 1 |
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.











