Surf Forecasts:
Knights surf forecast from 1 Sep 2026:
- Best quality surf: Thursday 3 Sep, 12PM (local time) - 11ft (3.5m), 14s period, SSW swell with cross-onshore winds.
- Most powerful swell: Tuesday 8 Sep, 9AM (local time) - 13ft (4.0m), 18s period, SSW swell with 8,649 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 12PM (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 12PM. 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 4.0m 18s and forecast to arrive on Tuesday (Sep 08) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Tuesday (Sep 01) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Thu 3rd Sep) | 11ft (3.5m) 14s |
| Best Surf | 12PM (Thu 3rd Sep) | 11ft (3.5m) 14s |
| Most Powerful | 9AM (Tue 8th Sep) | 13ft (4.0m) 18s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Right then, let’s have a look at the charts for Knights. This is a beach and reef setup that’s strictly for the advanced crew, and it’s fairly consistent with a liking for swell from the SSE. The water’s sitting at 59°, which is pretty much bang on average for this time of year, so no surprises there.
The forecast kicks off with a bit of a slow start. Tuesday the 1st has some solid 6 ft to 5 ft SSW groundswell with a very long 16-second period, and the combined energy is strong at 1379, but the tide conditions are questionable and the wind is a fresh cross-off. It’s clean, but not firing on all cylinders. Wednesday the 2nd sees the swell build to 7 ft in the morning and 8 ft in the afternoon, still from the SSW with that 15-16 second period. The energy jumps to 2566 and 2598, but the wind is cross-on and cross-shore, making it fairly choppy. It’s a pass for most.
Now, Thursday the 3rd through Saturday the 5th is a write-off. The swell gets huge – 12 ft to 13 ft – with strong energy readings of 4249 up to 7804, but the wind is onshore and lumpy, and the conditions are just poor. For a beach and reef break, that’s just a washing machine. Not worth paddling out for.
Sunday the 6th is where things get interesting. We’ve got an 8 ft SSW swell with a 14-second period, and the energy is a meaty 3071. The wind is offshore from the NE, light at 9 mph, keeping it clean. The report says it’s excellent for experienced surfers, and I’d agree – that’s a solid window. The morning looks best, with the afternoon holding at 7 ft and still offshore. That’s the standout of the first week.
Monday the 7th drops back to a 4 ft swell with much weaker energy (604) and a light cross-shore breeze, so it’s small and marginal. Tuesday the 8th looks massive again – 13 ft with an 18-second period, and the energy hits 13621. That’s a mental amount of power, but it’s too big for this break and the wind is onshore. Only for the truly mad.
The next real highlight is Thursday the 10th. The morning is glassy – wind from the W at 3 mph, practically nothing – with an 8 ft SSW swell at 15 seconds. Energy is 2830, and it’s described as excellent for experienced surfers. That’s a clean, powerful groundswell with perfect conditions. The afternoon gets a bit of a cross-on, but the morning session is the one.
Then Friday the 11th is another cracker. A 10 ft SSW swell with a 17-second period, energy at 5751, and a light cross-off wind from the NNW. That’s exceptional for the experts – long period groundswell, clean, and powerful. The morning is the pick, with the afternoon getting a stiffer cross-off but still clean.
After that, the swell drops and the wind turns messy. Saturday the 12th has a 7 ft swell with a fresh cross-off wind, but it’s a bit blown out by the afternoon. Sunday the 13th is poor with onshore winds. Monday the 14th is small and clean but only 4 ft, so not worth the drive.
The last standout is Tuesday the 15th. An 8 ft SSW swell with an 18-second period, energy at 3675, and a light offshore wind from the NNE. That’s a very long period groundswell, clean as a whistle, and excellent for experienced surfers. The morning is the call.
So, if you’re an advanced surfer, the best on offer is the morning of Sunday the 6th, and the morning of Thursday the 10th. Friday the 11th morning is also a beauty, but it’s a big swell for this spot. The long period stuff will be better on the reef than the beach section, so pick your line.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 19°C on Tue morning, min 11°C on Thu night). Winds decreasing (fresh winds from the NW on Tue morning, calm by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Fri night. Warm (max 20°C on Sun afternoon, min 8°C on Sat night). Winds decreasing (fresh winds from the NW on Fri afternoon, calm by Sun night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 16 | SSW 15 | SW 15 | SSW 16 | SSW 15 | SW 14 | SW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SW 13 | SSW 15 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 14 | SSW 8 |
Wave Graph | |||||||||||||||||||||
1379 | 936 | 1088 | 2510 | 2547 | 3285 | 4249 | 4216 | 4832 | 4698 | 3778 | 2598 | 5362 | 7804 | 6185 | 3071 | 1672 | 850 | 520 | 758 | 750 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | on | cross-on | cross | cross | cross-on | cross-on | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-off | off | off | cross-off | cross | on | on |
High Tide | 2:26PM0.94m | 2:57AM1.11m | 2:31PM0.88m | 3:29AM1.14m | 2:17PM0.85m | 4:04AM1.13m | 12:35PM0.87m | 4:47AM1.08m | 5:54AM1.00m | 11:43AM1.19m | |||||||||||
Low Tide | 7:59PM0.34m | 8:46AM0.54m | 8:03PM0.33m | 9:12AM0.69m | 8:08PM0.32m | 9:13AM0.85m | 8:14PM0.31m | 8:22AM0.97m | 8:22PM0.31m | 7:17AM0.99m | 8:30PM0.33m | 8:36PM0.36m | |||||||||
6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | |
— | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | |
mm | — | 2 | — | — | — | — | — | — | — | 1 | 1 | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 15 | 14 | 15 | 15 | 14 | 15 | 15 | 12 | 16 | 18 | 16 | 14 | 14 | 11 | 18 | 20 | 14 | 15 | 15 | 13 |
Feels °C | 12 | 10 | 13 | 11 | 10 | 9 | 11 | 11 | 10 | 13 | 13 | 11 | 8 | 9 | 9 | 15 | 17 | 12 | 12 | 11 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SW 15 | SSW 16 | SSW 15 | SW 14 | SW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | — | SSW 15 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 14 | SW 13 |
1379 | 936 | 1088 | 2510 | 2547 | 3285 | 4249 | 4216 | 4832 | 4698 | 3778 | 2598 | — | 7804 | 6185 | 3071 | 1672 | 850 | 520 | 736 | 576 | |
Swell 2 Height (m) Direction Period (s) | — | W 6 | SSW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 3 | SW 21 | SW 20 | SSW 19 |
— | 3 | 126 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 18 | 194 | 480 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 22 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 45 | — | — | |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | SW 4 | SW 6 | SW 6 | — | — | — | — | NNE 4 | — | WNW 4 | SW 13 | — | — | NE 4 | NE 4 | NW 3 | WNW 4 | SSW 7 | SSW 8 |
24 | 29 | 13 | 56 | 51 | — | — | — | — | 10 | — | 50 | 5362 | — | — | 25 | 31 | 5 | 21 | 758 | 750 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1023 | 4 | 137 | 2 | 404 | 577 | 1020 | 585 | 1 | 2 | 166 | 1029 | 1020 | 1178 | 1 | 0 | 0 | 0 | 18 | 411 | 570 |
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.











