
Surf Forecasts:
Knights surf forecast from 3 Sep 2026:
- Best quality surf: Thursday 3 Sep, 3PM (local time) - 11ft (3.5m), 14s period, SSW swell with cross-onshore winds.
- Most powerful swell: Wednesday 9 Sep, 6PM (local time) - 11ft (3.5m), 19s period, SSW swell with 8,934 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 3PM (local time) - 11ft (3.5m), 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 Thursday (Sep 03) at 3PM. The primary swell is predicted to be 3.5m and 14s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 3.5m 19s and forecast to arrive on Wednesday (Sep 09) 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 1.1m 4s period and expected on Saturday (Sep 05) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 3rd Sep) | 11ft (3.5m) 14s |
| Best Surf | 3PM (Thu 3rd Sep) | 11ft (3.5m) 14s |
| Most Powerful | 6PM (Wed 9th Sep) | 11ft (3.5m) 19s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a mixed bag coming up at Knights. This spot is a fairly consistent beach and reef setup, exposed to the south-southeast, so it picks up a lot of what’s thrown at it. The water’s sitting at 59°, which is pretty average for this time of year, so nothing wild there.
We’re in for a bit of a wait, though. There’s no real surf to get excited about right now. Thursday the 3rd has some size, but with a cross-onshore breeze and the swell predicted too big for this break, it’s a write-off. The real action doesn’t start firing until Friday the 4th.
Alright, let’s get into it. Friday the 4th morning is where it all kicks off. We’ve got a solid 12 ft SSW groundswell (combined energy 5368) rolling in with a 16-second period, and crucially, the wind is NNE at 6 mph — a light offshore. That’ll keep the surface glassy clean. It’s a big one though, over 8 ft, so this is strictly for the experienced crew. The afternoon stays clean too, with a cross-offshore breeze and the swell dropping a touch to 10 ft. That’s an excellent one, but still only for those who know what they’re doing.
Now, the standout session of this whole run has to be Sunday the 6th morning. We’ve got a 8 ft SSW swell (combined energy 2313) with a 13-second period and glassy conditions — WNW wind at a mere 3 mph, glassy. That’s as good as it gets. Clean, lined-up waves for the experienced surfer. It’s a cracker.
Monday the 7th drops right off with messy, cross-onshore chop, so we’ll give that a miss.
Tuesday the 8th morning is another one to circle. The swell is 7 ft from the SSW (combined energy 4127), period a very long 17 seconds, and we’ve got a light cross-offshore breeze from the east. Clean waves again, but with that long period, expect it to be a bit straighter at a beach break like this. Still, excellent conditions for the experienced lot.
Wednesday the 9th and Thursday the 10th keep the size up, but the wind turns cross-shore, so it gets a little bumpy. Still, the energy is strong (over 5000 on the 9th afternoon and 10th morning), so there’ll be power in the water.
Then we get a nice little run from Friday the 11th through Saturday the 12th. Consistent 6 ft to 5 ft SSW groundswell (15-second period) with moderate offshore or cross-offshore winds. Clean, more manageable size, still good for experienced surfers.
After that, the swell drops off through the 13th, and then we get another big pulse on Monday the 14th and Tuesday the 15th, but the wind is messy on the 14th — straight onshore. Tuesday the 15th morning is a gem though: 8 ft SSW groundswell (combined energy 3513) with a very long 18-second period and a light cross-offshore breeze. Clean again, but again, that long period might make it a bit straight at the beach.
The last few days, from the 16th to the 18th, are mostly messy with strong winds and big, choppy conditions. There’s a massive 13 ft pulse on Thursday the 17th, but it’s accompanied by rain and a strong cross-onshore wind — that’s a hard pass.
So, if you’re an experienced surfer, your best bets are Sunday the 6th morning for that glassy perfection, and Friday the 4th morning for the biggest, cleanest swell. The second week is more of a pick-and-choose game — Friday the 11th and Tuesday the 15th morning are worth a look, but less certain.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri morning. Very mild (max 19°C on Fri night, min 10°C on Thu night). Winds decreasing (strong winds from the WNW on Fri night, calm by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Sun morning, min 6°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | SW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SW 10 | SW 12 | SSW 13 | SSW 13 | SSW 12 | SSW 13 | SSW 13 | SSW 8 | SSW 12 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 20 | SSW 18 |
Wave Graph | |||||||||||||||||||||
3563 | 4399 | 5723 | 5368 | 4285 | 2945 | 1431 | 3477 | 3264 | 2313 | 1571 | 1117 | 512 | 394 | 1000 | 2968 | 2883 | 2354 | 2859 | 4034 | 7326 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | off | cross-off | cross-off | cross | cross-on | cross-on | glassy | on | cross-on | cross-on | cross-on | cross | cross-off | cross-on | cross | cross | cross | cross-off |
High Tide | 2:17PM0.85m | 4:04AM1.13m | 12:35PM0.87m | 4:47AM1.08m | 5:54AM1.00m | 11:43AM1.19m | 12:08PM1.21m | 00:51AM0.61m | 12:30PM1.19m | 00:40AM0.68m | |||||||||||
Low Tide | 8:08PM0.32m | 9:13AM0.85m | 8:14PM0.31m | 8:22AM0.97m | 8:22PM0.31m | 7:17AM0.99m | 8:30PM0.33m | 8:36PM0.36m | 8:36PM0.41m | 4:25AM0.53m | 8:21PM0.46m | ||||||||||
6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | |
— | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | 2 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 11 | 14 | 18 | 19 | 15 | 15 | 11 | 15 | 14 | 11 | 13 | 12 | 10 | 10 | 10 | 11 | 11 | 13 | 13 |
Feels °C | 11 | 10 | 9 | 12 | 16 | 14 | 8 | 9 | 7 | 13 | 11 | 8 | 8 | 7 | 6 | 6 | 6 | 8 | 7 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 13 | SSW 13 | SSW 12 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 18 |
3563 | 4399 | 5723 | 5368 | 4285 | 2945 | 1431 | 2144 | 3264 | 2313 | 1571 | 1117 | 512 | 304 | 1000 | 2968 | 2883 | 2354 | 2859 | 2961 | 7326 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | S 23 | SSW 22 | SSW 21 | SSW 19 | WSW 18 | — | SSW 26 | SSW 22 | SSW 20 | — |
— | — | — | — | — | — | — | — | — | — | — | 11 | 45 | 286 | 983 | 1159 | — | 133 | 1766 | 4034 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | WSW 21 | WSW 21 | SSW 14 | — | — | SSW 26 | WSW 21 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 45 | 173 | 81 | — | — | 67 | 1221 | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 4 | — | NW 4 | SW 10 | SW 12 | — | — | — | — | SSW 5 | SSW 8 | — | — | — | — | — | — | — |
— | — | — | 13 | — | 28 | 1430 | 3477 | — | — | — | — | 87 | 394 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 474 | 585 | 1 | 1 | 0 | 577 | 931 | 1038 | 2 | 0 | 33 | 2 | 137 | 168 | 0 | 0 | 164 | 168 | 189 | 168 | 164 |
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.










