
Surf Forecasts:
Knights surf forecast from 6 Aug 2026:
- Best quality surf: Monday 10 Aug, 3AM (local time) - 13ft (4.0m), 19s period, SW swell with cross-onshore winds.
- Most powerful swell: Thursday 13 Aug, 3AM (local time) - 20ft (6.0m), 17s period, SSW swell with 19,958 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9PM (local time) - 4ft (1.2m), 17s 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 (Aug 06) at 9PM. The primary swell is predicted to be 1.2m and 17s period with a secondary swell of 1.1m and 14s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 6.0m 17s and forecast to arrive on Thursday (Aug 13) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 5s period and expected on Tuesday (Aug 11) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 6th Aug) | 4ft (1.2m) 17s |
| Best Surf | 3AM (Mon 10th Aug) | 13ft (4.0m) 19s |
| Most Powerful | 3AM (Thu 13th Aug) | 20ft (6.0m) 17s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s talk about what’s shaping up at Knights. This is a beach and reef setup, exposed to the swell, and it's for the advanced crew – it can get tricky.
Right off the bat, Thursday the 6th morning has some clean surf on offer. We’re looking at a long-period 4ft swell out of the SSW (16-second intervals) and a light cross-offshore breeze. The water temp is sitting at 57°, which is about normal for this time of year. Combined wave energy is moderate at 707, and the conditions are clean. It’s not huge, but it’s a nice mellow option to get wet.
Friday the 7th morning is the standout in this outlook. The swell lifts to a solid 7ft from the SSW (16-second intervals) with a light offshore breeze – that’s a recipe for clean, lined-up faces. Combined energy jumps to 1995 (strong), and the report says excellent conditions for experienced surfers. This is the one to point the car at if you’ve got the skill.
Saturday the 8th drops off a bit. The swell sits around 5-6ft from the same direction, but the wind swings cross-off and builds to 19 mph. The energy is still decent (1200-1273), but it’s going to be a bumpier ride.
Sunday the 9th and Monday the 10th get wiped out by strong cross-onshore winds and building swell. Sunday afternoon sees an 12ft short-period SW swell with 22 mph wind – looks more like a kite session. Monday is a messy 10-12ft SW groundswell with onshore winds and energy readings over 5000 (strong). Choppy and lumpy.
By Tuesday the 11th, the wind turns cross-off again, but the swell is dropping to 6-7ft. The energy is still moderate-strong (993-1543), but the rating suggests it’s marginal. Wednesday the 12th through Thursday the 13th is a different beast – huge swell. We’re talking 13-21ft SSW groundswell (16-18 second periods and energy readings up to 42,106 – very strong). The reports say it’s just too big for this break, even with favorable wind. Expert only, and even then, proceed with massive caution.
Friday the 14th sees the swell settle back to 10ft, but wind is cross or cross-on, making it choppy and marginal. Saturday the 15th is a write-off with onshore winds and messy 10ft swell.
Now, a light at the end: Sunday the 16th morning. The swell drops to 7ft from the SSW (15-second intervals) with a light cross-off breeze from the ENE. Combined energy is a solid 1846, and it’s described as excellent for experienced surfers. Clean again, get on it.
Monday the 17th is smaller, 4-5ft with clean cross-off winds. Tuesday the 18th afternoon is a real treat: glassy conditions with a 4ft SW swell, period 14 seconds, and combined energy of 691 (moderate). That’s a sneaky good session.
Wednesday the 19th holds 6ft SW swell with cross-off winds, but the energy is strong (2899-3286). Clean but a bit windy. Then Thursday the 20th and Friday the 21st go downhill fast with rain showers and strong onshore winds, messy 5-10ft swell.
Overall, Friday the 7th morning and Sunday the 16th morning are your best bets. The swell direction (SSW) matches the optimum direction for Knights, and light offshore or cross-off winds will keep it clean. If you’re not an advanced surfer, give Wednesday the 12th and Thursday the 13th a wide berth – way too dangerous.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Very mild (max 18°C on Fri morning, min 12°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the NNW by Sat morning). | Days 4-6 Weather SummaryHeavy rain (total 28mm), heaviest during Tue night. Very mild (max 16°C on Tue morning, min 9°C on Sun night). Winds increasing (light winds from the WNW on Sun night, strong winds from the WNW by Tue night). | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 16 | SSW 15 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 16 | SW 19 | SW 17 | SW 17 | SSW 16 | SSW 14 | SSW 14 | SW 14 | SW 18 | SW 16 | SW 17 |
Wave Graph | |||||||||||||||||||||
666 | 788 | 1368 | 1832 | 1222 | 1734 | 1273 | 1206 | 934 | 743 | 3631 | 7625 | 5853 | 4448 | 2791 | 1495 | 1349 | 3320 | 10769 | 16021 | 19682 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | glassy | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on |
High Tide | 2:51PM0.93m | 5:32AM1.07m | 11:20AM1.18m | 11:49AM1.29m | 12:17PM1.35m | 1:19AM0.55m | 12:44PM1.37m | 00:58AM0.58m | 1:09PM1.34m | 1:01AM0.63m | |||||||||||
Low Tide | 9:08PM0.47m | 8:35AM1.01m | 9:07PM0.45m | 9:11PM0.43m | 9:20PM0.42m | 9:28PM0.43m | 9:32PM0.46m | 4:36AM0.47m | 9:25PM0.50m | ||||||||||||
7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | |
— | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | |
mm | — | — | — | — | — | 2 | 1 | — | 1 | 10 | 3 | — | — | — | 1 | — | 2 | 12 | 7 | 2 | 1 |
Temp °C | 16 | 15 | 13 | 18 | 18 | 15 | 15 | 17 | 13 | 11 | 11 | 10 | 13 | 14 | 13 | 16 | 16 | 11 | 10 | 10 | 12 |
Feels °C | 15 | 14 | 13 | 14 | 14 | 10 | 10 | 12 | 8 | 6 | 3 | 3 | 8 | 9 | 8 | 8 | 8 | 2 | 2 | 1 | 4 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 21 | SSW 19 | SW 17 | SW 17 | SSW 16 | SSW 14 | SSW 14 | SSW 19 | SW 18 | — | — |
666 | 788 | 1368 | 1832 | 1222 | 1734 | 1273 | 1206 | 934 | 743 | 449 | 3851 | 5853 | 4448 | 2791 | 1495 | 1349 | 2783 | 8416 | — | — | |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | SSW 7 | SSW 20 | SSW 18 | NW 4 | — | — | — | SW 18 | — | — | — | — | — | W 5 | SSW 24 | — | — | — | — |
29 | 20 | 18 | 151 | 572 | 8 | — | — | — | 246 | — | — | — | — | — | 4 | 55 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | WSW 20 | — | SSE 8 | SSE 6 | S 7 | — | — | — | SSW 18 | — | — | — | — | — | — | N 6 | — | — | — | — |
12 | 151 | — | 12 | 3 | 4 | — | — | — | 124 | — | — | — | — | — | — | 3 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | N 6 | — | — | NNW 4 | NW 4 | NNW 3 | WNW 4 | SW 16 | SW 19 | NW 4 | NW 4 | NW 4 | NNW 4 | NW 5 | SW 14 | SW 18 | SW 16 | SW 17 |
— | — | — | 15 | — | — | 10 | 12 | 9 | 11 | 3631 | 7625 | 12 | 24 | 21 | 49 | 78 | 3320 | 10769 | 16021 | 19682 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 137 | 0 | 0 | 2 | 0 | 146 | 577 | 3 | 2 | 404 | 809 | 2 | 2 | 1 | 577 | 1030 | 1020 | 577 | 870 | 585 |
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.











