
Surf Forecasts:
Knights surf forecast from 17 Jul 2026:
- Best quality surf: Friday 17 Jul, 6PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Friday 24 Jul, 12PM (local time) - 10ft (3.0m), 14s period, SSW swell with 3,351 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 6PM (local time) - 5.5ft (1.7m), 16s 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 Friday (Jul 17) at 6PM. The primary swell is predicted to be 1.7m and 16s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 3.0m 14s and forecast to arrive on Friday (Jul 24) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Jul 18) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 17th Jul) | 5.5ft (1.7m) 16s |
| Best Surf | 6PM (Fri 17th Jul) | 5.5ft (1.7m) 16s |
| Most Powerful | 12PM (Fri 24th Jul) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s on the menu for Knights.
First up, the water temp is sitting at 58°, which is about 1° cooler than normal for this time of year – just a little on the chilly side. You’ll want a decent suit.
The forecast opens with a solid pulse of groundswell. Friday morning the 17th is the standout of the whole run. We’ve got a 7ft SSW groundswell rolling in at a very long 16 seconds, and the wind is glassy from the NNW. That’s a recipe for clean, powerful sets at this exposed beach and reef setup. The combined energy is pumping at 2191 (moderate to strong energy), so there’s real grunt in the water. This is for advanced surfers only – it’s too big for beginners at that size. Friday afternoon stays glassy with the wind switching to the SSW, dropping to 6ft but still holding that long 16-second period. Both sessions are clean and excellent.
Saturday the 18th backs off a bit. Morning has clean 4ft SSW swell with an offshore breeze, and the combo swell energy drops to 493. It’s a fun, manageable size. Saturday afternoon goes glassy with a 3ft SSW swell – small and tidy.
Sunday the 19th through Tuesday the 22nd offers a run of clean, smaller surf in the 2ft to 5ft range, mostly with light offshore or cross-off winds. The swell periods stay in the 12 to 16-second range, so the waves will have shape and push despite the smaller size. Nothing huge, but consistent and rideable.
Wednesday the 23rd is where things get tricky. The swell bumps up to 8ft SSW with a 14-second period, and the combined energy jumps to 2379, but the wind is cross-on or onshore, killing the quality. Thursday the 24th sees the biggest swell of the forecast – 10ft on the afternoon with a 14-second period and a combined energy of 3110. That’s expert territory, and the cross-shore wind is going to chop it up. Still, for the brave, there’s a lot of water moving.
By Friday the 25th, the wind goes cross-off and the swell drops to 7ft, offering cleaner conditions for advanced surfers. But after that, the forecast gets messy. From Saturday the 26th through to the end of the month, we see consistent onshore or cross-onshore winds, with swell sizes ranging from 6ft to 8ft. The quality is poor, with a lot of choppy or unknown conditions. The 30th has a weird spike of very long period 22-second swell, but it’s only 2ft and the wind is strong. Not worth paddling out for.
The first week of August kicks off with rain and strong onshore winds pushing 7ft swell – that’s a hard pass.
So, if you’re looking for the best window, it’s Friday the 17th. That morning session is the one. After that, the weekend is clean but small, and the middle of the week offers size but messy wind. The second week is mostly a write-off, though the 25th might offer a brief clean-up for the experienced crew.
Rusty out.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 11°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Wed afternoon. Very mild (max 16°C on Mon morning, min 12°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 18 | SSW 16 | SW 16 | SW 15 | SW 15 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 | SSW 11 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||||
2191 | 1629 | 899 | 493 | 362 | 346 | 218 | 216 | 339 | 573 | 418 | 623 | 867 | 700 | 540 | 519 | 584 | 814 | 2379 | 2122 | 2121 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | off | glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | on | on | cross-on | on | cross |
High Tide | 2:29PM1.27m | 2:07AM0.73m | 2:49PM1.19m | 2:44AM0.81m | 3:06PM1.12m | 3:24AM0.88m | 3:20PM1.06m | 4:08AM0.94m | 3:29PM1.02m | 4:58AM0.98m | 3:26PM0.99m | 6:05AM1.00m | |||||||||
Low Tide | 10:00PM0.58m | 7:10AM0.39m | 9:47PM0.57m | 7:49AM0.47m | 9:45PM0.54m | 8:25AM0.58m | 9:53PM0.52m | 8:53AM0.72m | 10:07PM0.51m | 8:57AM0.86m | 10:26PM0.51m | 8:04AM0.99m | 10:45PM0.53m | ||||||||
7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:18 | — | — | |
— | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:23 | — | — | 5:24 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 14 | 15 | 13 | 16 | 17 | 15 | 15 | 15 | 14 | 16 | 15 | 15 | 16 | 15 | 14 | 15 | 14 | 13 | 13 | 13 | 11 |
Feels °C | 12 | 13 | 11 | 14 | 16 | 13 | 12 | 12 | 11 | 13 | 12 | 13 | 13 | 13 | 12 | 13 | 12 | 12 | 11 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 11 | SSW 16 | SW 16 | SW 15 | SW 15 | SW 13 | SW 13 | SW 12 | SW 12 | SSW 13 | SSW 11 | SSW 14 | SSW 14 | SSW 14 |
2191 | 1629 | 899 | 493 | 362 | 346 | 218 | 95 | 339 | 573 | 418 | 623 | 867 | 700 | 540 | 519 | 225 | 814 | 2379 | 2122 | 2121 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 7 | SW 22 | SW 20 | SW 12 | S 10 | SSW 10 | S 10 | S 9 | — | — | — | — | — | SSW 14 | — | — | — |
— | — | — | — | 1 | 18 | 97 | 92 | 54 | 34 | 17 | 7 | — | — | — | — | — | 732 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 22 | SW 20 | SSW 18 | SW 13 | — | NW 4 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | 18 | 186 | 216 | 80 | — | 2 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 3 | — | NNE 2 | NNE 3 | NNE 3 | — | NNW 3 | NW 4 | — | — | — | — | WSW 5 | SW 11 | — | — | — | — |
— | — | — | 1 | — | 1 | 2 | 1 | — | 4 | 3 | — | — | — | — | 38 | 584 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 137 | 137 | 137 | 159 | 1 |
Best forecast wave conditions in South Australia - East Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










