
Surf Forecasts:
Knights surf forecast from 8 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 9AM (local time) - 13ft (4.0m), 16s period, SW swell with cross-shore winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 13ft (4.0m), 19s period, SW swell with 11,333 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 5ft (1.5m), 14s 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 Sunday (Aug 09) at 12AM. The primary swell is predicted to be 1.5m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 4.0m 19s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Aug 11) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 9th Aug) | 5ft (1.5m) 14s |
| Best Surf | 9AM (Wed 12th Aug) | 13ft (4.0m) 16s |
| Most Powerful | 6AM (Mon 10th Aug) | 13ft (4.0m) 19s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, let’s get into it.
The next couple of weeks are a bit of a mixed bag for the region. We’ve got some real power showing up in the middle of the run, but it’s gonna be too much of a good thing for our main spot. The start of the period is pretty quiet, and we’ll have to be patient. The first few days don’t have much to get excited about, with only marginal conditions and light winds. It’s not looking like a total loss, but it’s not gonna be a surf-heavy start either.
Heading into Sunday the 9th, there’s a bit of a pickup. We’re looking at a 5ft SW swell with a 16-second period, and the wind is offshore from the N, which is a solid combo. The energy is moderate, at 1018, and while it’s not massive, it’ll be clean. This is a good day for the more experienced crew, not for beginners.
Monday the 10th is a complete write-off. The swell jumps to 13ft but the wind is a fresh cross-onshore and it’s lumpy as anything. The energy is strong, 14876, but it’s a mess. Better off finding something else to do. This pushes into Tuesday the 11th, where we’ve got a 6ft SSW swell, but the fresh cross-off wind and the lumpy conditions keep things marginal. The water temp is 57°, which is about average for this time of year, so we’re not dealing with anything crazy there.
Wednesday the 12th and Thursday the 13th are the same story – the swell is just too big for this break. We’re looking at 13ft and 12ft swells, with strong energy readings over 12000. The wind is cross-onshore and it’s just too much. This size is only for experts, and even then, the conditions are poor. It’s a good time to stay on the beach.
Finally, we get a break in the clouds. Friday the 14th is still big at 12ft, but the wind is lighter. It’s still cross-onshore and choppy, so it’s not ideal. However, Saturday the 15th is where it starts to get interesting. The swell drops to 8ft, and we have a glassy morning with a slight air. The energy is dropping to 3130, but it’s clean and the conditions are described as excellent for experienced surfers. This is the first real standout. It’s an 8ft SSW swell, so it’s still big, but the clean conditions make it worth a look for the advanced crew.
Sunday the 16th drops off a bit to 7ft, but the cross-on wind comes back, making it marginal again. Monday the 17th is a return to cleaner conditions. The wind is cross-off from the ENE, and we have a 5ft SSW swell. It’s a bit smaller, but it’s clean and the energy is moderate at 1124. This is a good one for a log or a fun board.
The middle of the week, Tuesday the 18th, has a small 3ft swell in the morning, but it picks up a bit in the afternoon with a 4ft SSW swell and a 17-second period. The wind is offshore and clean. It’s small, but it’s fun. Wednesday and Thursday are similar – small, clean, cross-off winds, and not much energy. It’s a good time for a longboard session.
Then we get to the real gem. Friday the 21st. We have a 6ft WSW swell with an 18-second period, and the wind is light and cross-off from the NNW. The energy is strong at 4174. Conditions are described as excellent for experienced surfers. This is a standout.
The weekend is looking good too. Saturday the 22nd is a bit smaller, but still clean. The real highlight is Sunday the 23rd. We’re looking at a 7ft SW swell with a massive 19-second period, and the wind is a gentle offshore from the NNE. The energy is up at 6130. This is an exceptional forecast for expert surfers. It’s a bit of a wait, but this is the one to circle on the calendar. This is the best on offer.
So, to cut a long story short: the early days are quiet, the middle is a mess, but the tail end of the forecast holds some proper gems. The 15th and the 23rd are the standout days, with the 23rd looking like the pick of the bunch. Keep an eye on the forecast, because the long-range stuff can change, but right now, that’s the one.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Sun afternoon. Very mild (max 17°C on Sat afternoon, min 10°C on Mon night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Very mild (max 15°C on Tue afternoon, min 9°C on Tue night). Winds decreasing (fresh winds from the NNW on Tue afternoon, light winds from the WNW by Thu night). | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 15 | SSW 14 | SSW 14 | SW 16 | SSW 19 | SW 18 | SW 17 | SSW 16 | SSW 14 | SSW 14 | SW 16 | SW 16 | SW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 |
Wave Graph | ||||||||||||||||||||
1332 | 934 | 607 | 1018 | 2995 | 10234 | 7032 | 3156 | 1525 | 934 | 4819 | 7573 | 7751 | 5991 | 7073 | 6265 | 4636 | 6507 | 5076 | 3623 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | off | on | cross-on | cross-on | cross | cross-off | cross-off | cross-on | cross | cross-on | cross | cross-on | cross-on | cross | cross-on | on | on |
High Tide | 11:49AM1.29m | 12:17PM1.35m | 1:19AM0.55m | 12:44PM1.37m | 00:58AM0.58m | 1:09PM1.34m | 1:01AM0.63m | 1:30PM1.27m | 1:16AM0.71m | 1:49PM1.20m | 1:38AM0.81m | |||||||||
Low Tide | 9:11PM0.43m | 9:20PM0.42m | 9:28PM0.43m | 9:32PM0.46m | 4:36AM0.47m | 9:25PM0.50m | 5:36AM0.40m | 9:03PM0.52m | 6:23AM0.35m | 8:38PM0.51m | ||||||||||
— | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | |
5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:40 | — | |
mm | — | 5 | — | 8 | 4 | — | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 17 | 14 | 16 | 14 | 13 | 13 | 12 | 12 | 14 | 15 | 10 | 14 | 14 | 12 | 15 | 15 | 14 | 15 | 13 | 13 |
Feels °C | 13 | 10 | 13 | 11 | 7 | 7 | 7 | 8 | 8 | 8 | 3 | 8 | 8 | 7 | 10 | 11 | 12 | 11 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SW 16 | SSW 19 | SW 18 | SW 17 | SSW 16 | SSW 14 | SSW 14 | NNW 5 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 |
1332 | 934 | 607 | 1018 | 2995 | 4642 | 4227 | 3156 | 1525 | 934 | 8 | 3378 | 4992 | 5991 | 7073 | 6265 | 4636 | 6507 | 5076 | 3623 | |
Swell 2 Height (m) Direction Period (s) | — | — | SSW 18 | — | WSW 18 | — | — | — | — | SSW 18 | — | SW 19 | — | — | — | — | — | — | — | — |
— | — | 31 | — | 2056 | — | — | — | — | 520 | — | 1210 | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | 82 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNE 4 | N 3 | N 3 | NNW 3 | SSW 3 | SW 18 | SW 17 | — | NW 4 | NW 4 | SW 16 | SW 16 | SW 17 | — | — | — | — | — | — | — |
12 | 6 | 6 | 6 | 7 | 10234 | 7032 | — | 10 | 14 | 4819 | 7573 | 7751 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 0 | 1 | 0 | 394 | 502 | 809 | 1 | 577 | 523 | 404 | 578 | 1020 | 591 | 578 | 570 | 2 | 2 | 137 | 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.











