
Surf Forecasts:
Knights surf forecast from 21 Jul 2026:
- Best quality surf: Thursday 23 Jul, 3AM (local time) - 11ft (3.5m), 14s period, SSW swell with onshore winds.
- Most powerful swell: Thursday 23 Jul, 9PM (local time) - 13ft (4.0m), 16s period, SSW swell with 7,332 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 3AM (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 (Jul 23) at 3AM. The primary swell is predicted to be 3.5m and 14s period with a secondary swell of 3.0m and 14s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 4.0m 16s and forecast to arrive on Thursday (Jul 23) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Jul 27) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 23rd Jul) | 11ft (3.5m) 14s |
| Best Surf | 3AM (Thu 23rd Jul) | 11ft (3.5m) 14s |
| Most Powerful | 9PM (Thu 23rd Jul) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, Rusty here, let’s look at what’s coming for Knights.
This spot needs some patience. The start is a bust, with onshore winds and sloppy conditions. The real action doesn’t really fire up until the last few days of July and into the first week of August. It’s a heavy wave, so this is strictly for the experienced crew.
There’s a long dry spell at the beginning. The first real chance to get wet isn't until Wednesday the 22nd, and it’s pretty marginal. You’ll see a 4ft SSW swell with a 12-second period, but that cross-shore wind from the WNW leaves it bumpy. The combined energy is moderate (685). The afternoon goes worse with a cross-on breeze, so that day is a wash.
Thursday the 23rd is a total mess. The swell jumps to 10ft and then 13ft, but it’s all onshore wind and huge, raw energy (3496 and 10013). That’s not surfable. Friday the 24th is still heavy, with an 12ft to 10ft SSW swell, but the wind is cross-on and the 16-second period groundswell is very long. The combined energy is strong (5323). The morning is flagged as having favorable tide and wind, but the swell is too big for this break. Only for the fearless.
The run of decent surf finally gets going on Sunday the 26th. The swell drops to a cleaner 6ft from the SSW, with an 11-second period. The wind is a light cross-off from the NW, leaving it clean. The energy is moderate (826). It’s not huge, but it’s your first proper window. Monday the 27th morning is clean again with a 5ft SW swell and cross-off NNW wind (522 energy). The afternoon is the real standout of that week: a 8ft WSW swell, clean with a cross-off breeze, and the combined energy jumps to 1306. The report says it’s excellent for experienced surfers, and that’s the best of the first half.
Tuesday the 28th is a beast. It’s a 10ft SSW swell with a very long 15-second period, and the energy is massive at 3649. The morning is glassy clean with a light offshore from the E. That’s a serious groundswell, and for a reef or point, that’s a dream. For a beach and reef setup, that long period can make things fat and straight. But for the advanced crew, that’s a session to circle.
Wednesday the 29th is a magic moment. Glassy conditions, zero wind, and an 8ft SSW swell with a 14-second period. The energy is 2680. That’s clean, powerful, and the best on offer for the whole run. If you can get out, this is the day.
From Thursday the 30th, things start to taper, but there’s still some fun. The 31st of July brings a 7ft SSW swell with a crazy long 18-second period, but the cross-on wind and high energy (2851) will make it tricky. Crowds are often at Knights, so expect company on these good days.
The first week of August is a slow fade. The 1st of August has a clean 4ft SSW swell with offshore winds from the NE. The 2nd and 3rd see stronger winds from the north, and the swell drops. By the 5th and 6th, it’s all over. The combined energy falls to 333 and 352. The water temperature is about average for the time of year, so no surprises.
The standout without a doubt is Wednesday the 29th of July. Glassy, clean, 8ft SSW groundswell with a 14-second period. That’s the one to chase. The afternoon of Monday the 27th is a close second for the cleaner, more manageable 8ft set.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed morning. Very mild (max 14°C on Tue night, min 11°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 15°C on Sat morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
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 12 | SSW 12 | SSW 12 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SW 11 | WSW 11 | SSW 13 |
Wave Graph | |||||||||||||||||||
531 | 359 | 458 | 4302 | 3496 | 6138 | 5167 | 5323 | 4061 | 2689 | 2021 | 1599 | 1141 | 759 | 560 | 412 | 515 | 1304 | 2678 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | on | on | on | on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-off | cross | off | cross-off | cross-off | off |
High Tide | 4:58AM0.98m | 3:26PM0.99m | 6:05AM1.00m | 11:08AM1.14m | 11:31AM1.23m | 11:46PM0.57m | 11:56AM1.30m | 00:06AM0.58m | 12:20PM1.33m | 00:27AM0.59m | |||||||||
Low Tide | 10:07PM0.51m | 8:57AM0.86m | 10:26PM0.51m | 8:04AM0.99m | 10:45PM0.53m | 10:29PM0.55m | 9:52PM0.56m | 9:36PM0.54m | 9:24PM0.52m | ||||||||||
— | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | |
— | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | |
mm | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 |
Temp °C | 14 | 13 | 13 | 12 | 11 | 11 | 12 | 13 | 13 | 13 | 15 | 15 | 13 | 15 | 15 | 13 | 15 | 15 | 14 |
Feels °C | 11 | 10 | 8 | 6 | 5 | 5 | 8 | 8 | 8 | 11 | 11 | 11 | 11 | 13 | 13 | 10 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SSW 12 | SSW 12 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SW 11 | S 9 | SSW 14 |
531 | 359 | 458 | 4302 | 3496 | 6138 | 5167 | 5323 | 4061 | 2689 | 2021 | 1599 | 1141 | 759 | 560 | 412 | 515 | 2 | 876 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 14 | — | — | — | — | — | — | — | — | — | — | — | SW 16 | SSW 17 | SSW 15 | S 9 | N 6 | S 16 |
— | 289 | — | — | — | — | — | — | — | — | — | — | — | 41 | 29 | 89 | 7 | 1 | 262 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 16 | — | S 10 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 26 | — | 51 | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 3 | WSW 5 | SW 7 | SSW 14 | — | SSW 14 | SSW 16 | — | — | — | — | — | — | — | NW 3 | NW 3 | WNW 5 | WSW 11 | SSW 13 |
2 | 37 | 195 | 2838 | — | 3875 | 4504 | — | — | — | — | — | — | — | 2 | 2 | 63 | 1304 | 2678 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 1 | 570 | 167 | 591 | 167 | 137 | 137 | 651 | 591 | 2 | 167 | 2 | 0 | 2 | 0 | 0 | 0 | 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.










