Surf Forecasts:
Knights surf forecast from 22 Aug 2026:
- Best quality surf: Sunday 23 Aug, 6AM (local time) - 7ft (2.2m), 14s period, SSW swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 3AM (local time) - 7ft (2.2m), 18s period, SSW swell with 3,032 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 3AM (local time) - 8ft (2.5m), 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 23) at 3AM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 0.9m and 19s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 2.2m 18s and forecast to arrive on Friday (Aug 28) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Aug 24) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 23rd Aug) | 8ft (2.5m) 14s |
| Best Surf | 6AM (Sun 23rd Aug) | 7ft (2.2m) 14s |
| Most Powerful | 3AM (Fri 28th Aug) | 7ft (2.2m) 18s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
G'day, Rusty here, looking at the forecast for Knights. This spot is a solid advanced break, a beach and reef combo that's exposed to the south. We're in for a mixed bag over the next 16 days, with some real standouts mixed in with a bit of chop and larger swell.
The water temp is about average for this time of year, so nothing too wild, just standard conditions for a wetsuit.
The first real action kicks off on Sunday the 23rd of August. Morning starts with a clean 7ft swell from the SSW, and a light NNE offshore breeze. The wave energy is pumping at 2626, so it's got some serious grunt. You'll be looking at excellent surf for experienced surfers, but with that size and power, it's definitely not for the beginners. The afternoon sees the wind shift to a cross-shore from the WNW, but the swell holds strong at 7ft, though the period drops to 16 seconds.
Monday the 24th is a beauty. The morning is glassy as anything with an ESE wind at 5 km/h, and a clean 5ft SSW swell. The energy is a moderate 997, but that glassy surface makes it a top pick. The afternoon stays clean with a cross-offshore breeze and a 4ft swell.
Tuesday the 25th is a write-off. Strong onshore winds from the SSW will ruin the surface, so give it a miss.
Wednesday the 26th bounces back nicely. The morning is clean again with a light cross-offshore wind from the NW and a 6ft SSW swell. Energy is at 1094, so it's a solid session for experienced surfers.
Thursday the 27th is another good one. The morning has a 4ft SSW swell with a 14-second period, and a clean cross-offshore breeze. The afternoon is a real highlight: a 3ft swell from the SW with a very long period of 20 seconds. This is a proper groundswell. The energy is still high at 1365, and the clean conditions make it a dream for the experienced crew. That long period will groom the waves, but it might break a bit straight at the beach, so work the reef.
Friday the 28th is the standout of the whole period. The morning is glassy, dead calm wind, with a 7ft SSW swell and a long 17-second period. The energy is massive at 2556. This is one for the advanced surfers only, but the conditions are excellent. The afternoon gets a bit cross-onshore, but still a solid 7ft swell.
The second week gets a bit more weather-dependent. Sunday the 30th of August has a massive 10ft SSW swell in the afternoon, but the wind is cross-onshore, making it a bit messy. The energy is huge at 4092, but it's a wild one.
Monday the 31st of August is the next big standout. The morning is clean with a 8ft SSW swell, a 17-second period, and a light cross-offshore wind. Energy is a massive 3963. This is a proper session, but only for the experts.
Tuesday the 1st of September gets a bit fresh with the wind, especially in the morning at 30 km/h, but it's cross-offshore, keeping it clean. The swell drops to 6ft.
Thursday the 3rd of September sees the afternoon swell jump to a massive 13ft from the SW, with a 15-second period and an energy reading of 12896. That's a monster, but the wind is onshore and choppy, so it's a no-go for paddle surfing – that's kite territory.
Friday the 4th of September has a huge 12ft SSW swell in the morning, but the wind is light cross-onshore. The forecast says it's predicted to be too big for the break, so even for the experts, it's a "watch and wait" situation.
Saturday the 5th of September settles back to a manageable 7ft SSW swell with a clean cross-offshore breeze, a solid end to the period.
The best of the best are the glassy mornings on Friday the 28th of August and Monday the 31st of August. Saturday the 28th is the absolute top pick for a clean, powerful, and long-period swell with no wind. The 31st is a close second.
Stay safe out there, and keep your eyes on the horizon.
Rusty
Short Range ForecastModerate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 17°C on Sun morning, min 11°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Fri morning, min 11°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 12 | SSW 11 | SSW 11 | SSW 14 | SW 20 | SSW 18 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||
2736 | 1867 | 2479 | 1537 | 982 | 662 | 669 | 1449 | 1222 | 1516 | 1032 | 517 | 492 | 621 | 784 | 2212 | 2551 | 1928 | 1441 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross | off | glassy | cross-off | cross-on | on | on | cross-on | cross-off | cross | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | glassy |
High Tide | 11:23AM1.13m | 11:44AM1.18m | 00:40AM0.59m | 12:05PM1.20m | 00:37AM0.61m | 12:27PM1.20m | 00:45AM0.65m | 12:49PM1.19m | 00:59AM0.70m | 1:11PM1.16m | 1:17AM0.77m | ||||||||
Low Tide | 8:54PM0.45m | 8:42PM0.45m | 8:26PM0.43m | 4:30AM0.48m | 8:08PM0.40m | 5:20AM0.39m | 7:54PM0.38m | 6:00AM0.31m | 7:49PM0.36m | ||||||||||
— | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | |
— | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | |
mm | — | — | — | — | 2 | 5 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 17 | 17 | 15 | 14 | 12 | 13 | 14 | 13 | 12 | 14 | 15 | 12 | 16 | 17 | 15 | 18 | 17 | 15 |
Feels °C | 12 | 15 | 15 | 12 | 12 | 10 | 10 | 9 | 8 | 9 | 12 | 13 | 10 | 12 | 14 | 13 | 16 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 16 | SSW 14 | SSW 14 | SSW 12 | SSW 11 | SSW 11 | SSW 14 | SSW 13 | SSW 18 | SSW 17 | SSW 16 | SSW 16 |
2736 | 1867 | 2479 | 1537 | 982 | 662 | 669 | 371 | 1222 | 1516 | 1032 | 517 | 492 | 621 | 581 | 2212 | 2551 | 1928 | 1441 | |
Swell 2 Height (m) Direction Period (s) | SSW 19 | SSW 18 | — | — | SW 20 | SW 20 | SW 18 | SSW 16 | WSW 15 | WSW 14 | SSW 18 | SSW 13 | SSW 16 | SW 22 | SW 20 | SW 13 | S 8 | SE 8 | S 8 |
774 | 759 | — | — | 15 | 15 | 81 | 339 | 252 | 874 | 31 | 313 | 99 | 231 | 784 | 486 | 5 | 3 | 1 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NE 3 | SSW 16 | — | — | SSW 18 | SSW 16 | SW 24 | SW 22 | — | S 8 | — | — | — |
— | — | — | — | — | — | 6 | 339 | — | — | 31 | 53 | 22 | 375 | — | 5 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 2 | — | SSW 13 | SW 6 | — | — | — | — | NNE 2 | — | — | — | — | — |
— | — | — | — | — | 1 | — | 1449 | 188 | — | — | — | — | 1 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 1 | 0 | 0 | 0 | 2 | 167 | 578 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 164 | 0 |
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.











