Surf Forecasts:
Knights surf forecast from 13 Jul 2026:
- Best quality surf: Monday 13 Jul, 3PM (local time) - 13ft (4.0m), 16s period, SSW swell with cross-shore winds.
- Most powerful swell: Tuesday 14 Jul, 12AM (local time) - 13ft (4.0m), 17s period, SSW swell with 9,574 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 3PM (local time) - 13ft (4.0m), 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 Monday (Jul 13) at 3PM. The primary swell is predicted to be 4.0m and 16s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 4.0m 17s and forecast to arrive on Tuesday (Jul 14) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Jul 17) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Mon 13th Jul) | 13ft (4.0m) 16s |
| Best Surf | 3PM (Mon 13th Jul) | 13ft (4.0m) 16s |
| Most Powerful | 12AM (Tue 14th Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Knights over the next 16 days.
Alright, let’s break down what’s happening at Knights.
The water is sitting at 58°, which is about a degree and a half colder than usual for this time of year. A bit crisp, so bring a thick wetsuit.
The forecast starts with a massive pulse. Monday the 13th and Tuesday the 14th are bringing a solid 13ft SSW groundswell with a 16-second period, and the combined energy is pumping hard – 7616 (strong). That’s expert territory. If you’re not a seasoned charger, stay on the beach. The wind is mostly cross or cross-on, but the real problem is the size – it’s just too big for this break.
Wednesday the 15th drops to 8ft, but the wind is messy and the quality is marginal. Not worth paddling out.
Then we get a proper turn. Thursday the 16th is the standout of the first week. The swell drops to a still-chunky 8ft from the SSW, period 15 seconds, and the wind goes glassy offshore in the morning and glassy in the afternoon. Clean. Clean. Clean. The energy is still strong at 2508. This is for experienced surfers only – it’s a good step down from the 13ft stuff, but it’s still powerful. Friday the 17th is a close second with 7ft and clean offshore winds.
Saturday the 18th drops right down to 4ft with glassy conditions, but the energy is weak (493). It’s a small, clean day for the logs.
Sunday the 19th is a real curveball – the swell is only 2ft, but the period is a very long 20 seconds, and the energy is 772. That’s a tiny, long-period groundswell. It’ll be super clean, but it’s for the points and reefs. At a beach-and-reef setup, that long period might make it break a bit straight and fat. Worth a look on a longboard.
Monday the 20th sees the swell bump back up to 5ft, clean, and the energy climbs to 1137. Good solid surf.
Then we have a rough patch. Tuesday the 22nd and Wednesday the 23rd get hit with strong winds – 28 mph on Wednesday afternoon – and the swell is messy. The quality drops hard. Thursday the 24th is a total reset. Another big pulse hits: 10ft SSW swell with an 18-second period, energy at 5794. That’s exceptional, but it’s for experts only. The wind is light offshore and clean. If you’re good enough, this is the best day of the whole forecast.
After that, it gets messy again. Friday the 25th through to Tuesday the 28th is a long stretch of poor to marginal conditions. The wind is mostly cross or cross-on, and the swell is all over the place.
In short, the best on offer is Thursday the 16th and Friday the 17th for the first week, and then Thursday the 24th for the big stuff if you’ve got the skills. The rest is either too big, too windy, or too small.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Mon morning, min 11°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Fri afternoon, min 11°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 17 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 20 | SSW 18 | SSW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7616 | 7098 | 9574 | 6984 | 5231 | 3629 | 2887 | 2292 | 2033 | 2508 | 2355 | 1716 | 2058 | 1881 | 961 | 493 | 458 | 330 | 373 | 422 | 919 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | off | off | glassy | off | off | cross-off | off | off | glassy | off | off | cross-off | off |
High Tide | 12:44PM1.46m | 00:43AM0.53m | 1:14PM1.46m | 00:52AM0.55m | 1:42PM1.42m | 1:10AM0.59m | 2:07PM1.36m | 1:35AM0.66m | 2:29PM1.27m | 2:07AM0.73m | 2:49PM1.19m | 2:44AM0.81m | 3:06PM1.12m | 3:24AM0.88m | |||||||
Low Tide | 10:23PM0.50m | 3:58AM0.45m | 10:34PM0.51m | 4:53AM0.40m | 10:34PM0.54m | 5:42AM0.36m | 10:20PM0.57m | 6:28AM0.35m | 10:00PM0.58m | 7:10AM0.39m | 9:47PM0.57m | 7:49AM0.47m | 9:45PM0.54m | ||||||||
 | |  | | |  | | | | | | | | | |  | |  | | | | |
 | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — |
 | — | 5:17 | — | — | 5:19 | — | — | 5:20 | — | — | 5:20 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 14 | 15 | 15 | 13 | 14 | 13 | 12 | 14 | 15 | 13 | 15 | 17 | 14 | 17 | 17 | 16 | 18 | 18 | 15 |
Feels °C | 11 | 10 | 10 | 12 | 13 | 12 | 13 | 11 | 11 | 12 | 14 | 12 | 12 | 15 | 12 | 15 | 16 | 13 | 15 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 11 | SSW 17 |
| kJ | 7616 | 7098 | 9574 | 6984 | 5231 | 3629 | 2887 | 2292 | 2033 | 2508 | 2355 | 1716 | 2058 | 1881 | 961 | 493 | 458 | 330 | 211 | 166 | 919 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 22 | SW 20 | SSW 18 | S 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 18 | 188 | 422 | 62 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 22 | SW 20 | SW 15 | S 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 45 | 373 | 8 | 59 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | NE 3 | NE 3 | NNE 3 | NE 3 | NE 3 | NNE 3 | NNE 3 | NW 3 | NNE 3 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 5 | 3 | 5 | 2 | 3 | 3 | 2 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 870 | 1170 | 578 | 578 | 157 | 2 | 1 | 22 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 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.
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