
Surf Forecasts:
Knights surf forecast from 4 Aug 2026:
- Best quality surf: Monday 10 Aug, 9AM (local time) - 11ft (3.5m), 13s period, SW swell with cross-shore winds.
- Most powerful swell: Tuesday 11 Aug, 3PM (local time) - 16ft (5.0m), 15s period, SW swell with 11,306 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 9PM (local time) - 5.5ft (1.7m), 11s 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 Tuesday (Aug 04) at 9PM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 0.6m and 21s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Knights in the next 16 days are 5.0m 15s and forecast to arrive on Tuesday (Aug 11) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Monday (Aug 10) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 4th Aug) | 5.5ft (1.7m) 11s |
| Best Surf | 9AM (Mon 10th Aug) | 11ft (3.5m) 13s |
| Most Powerful | 3PM (Tue 11th Aug) | 16ft (5.0m) 15s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, this is Rusty checking in. Let’s have a good look at what’s on the cards for Knights.
The next few days are a bit of a mixed bag, but we’ve got a couple of real standout windows coming up if you’re patient. The water temp here is sitting at 58°F, which is pretty much what you’d expect for this time of year, nothing unusual there.
We kick off on Tuesday the 4th of August, and honestly, it’s a bit of a write-off. The swell is there at 7 ft, but it’s coming from the SSW with a cross-on wind that’s messing things up. The energy is solid (1397), but the quality is lacking. Wednesday the 5th is a different story – a nice little drop in size to 3 ft, but the wind swings cross-off and it’s clean. The period is a very long 19 seconds, which is proper groundswell energy (875), but that long period can make it a bit too straight for a beach break setup. It’ll be clean, but don’t expect perfection.
Thursday the 6th is a bit average again, with cross-on winds and small, choppy surf. Then we get to Friday the 7th – now we’re talking. The wind goes offshore early, with a clean 6 ft SSW swell at a solid 15 seconds (1960). This is excellent for experienced surfers. The wind holds through the afternoon, shifting to a clean cross-off. Saturday the 8th looks even better for the morning session – strong offshore winds from the NNE at 15 mph, with a clean 6 ft SSW swell (1517). The energy is still moderate-strong, and the conditions are looking prime for a good session. Saturday afternoon gets a bit sketchy with the wind picking up, so get in early.
Now, here’s a major warning. Sunday the 9th, that swell jumps up to 15 ft on the afternoon, with a fresh cross-on wind and lumpy conditions. That’s serious, and it’s going to be a mess. Monday the 10th is still big, with a 10 ft groundswell, but the wind is cross-off and it’s clean. Still, 10 ft is big – only for the experts. The energy is massive (6885). Tuesday the 11th is even bigger at 12 ft, and the notes say it’s simply too big for this break. Wednesday the 12th is a no-go as well, with a 20 ft monster swell (38669). That’s a full-on swell event, not for paddling.
The real standout, though, the one that’s got me excited, is Saturday the 15th of August. Morning has a clean 7 ft SSW swell at a very long 19 seconds (3376), with a cross-off wind. The afternoon goes glassy with a 7 ft swell (2796) – that’s your best bet for a clean, powerful session. This is the one to circle on the calendar. Sunday the 16th also looks fantastic, with offshore winds and a clean 6 ft to 7 ft swell, glassy in the afternoon. Monday the 17th morning is another big one for experts, with a 8 ft SSW swell (5802) and clean conditions.
The last few days from the 18th drop off in size and quality, with the wind turning more cross-on. So, for the best on offer, I’d be looking at Friday the 7th and Saturday the 15th of August. Friday is a solid, clean session for the experienced crew, and the 15th is the real gem – glassy, powerful, and clean. Get on it.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Thu morning, min 8°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 27mm), heaviest during Sat night. Very mild (max 17°C on Fri morning, min 10°C on Sun morning). Winds increasing (light winds from the N on Fri morning, strong winds from the W by Sun night). | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 12 | SSW 11 | SSW 10 | SSW 19 | SSW 18 | SSW 17 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SW 15 | SW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SW 16 | WSW 10 | SW 13 | SSW 17 | SSW 16 |
Wave Graph | |||||||||||||||||||||
1106 | 853 | 532 | 470 | 413 | 1032 | 729 | 853 | 1386 | 1423 | 1103 | 1863 | 1498 | 1368 | 1087 | 763 | 1018 | 1602 | 3588 | 6602 | 3868 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-off | off | cross-off | cross-off | cross | on | off | off | cross-off | off | off | off | cross-off | cross-off | cross | cross-on | cross | cross-off | cross-off |
High Tide | 3:16PM1.03m | 3:59AM1.01m | 3:20PM0.96m | 4:39AM1.06m | 2:51PM0.93m | 5:32AM1.07m | 11:20AM1.18m | 11:49AM1.29m | 12:17PM1.35m | 1:19AM0.55m | |||||||||||
Low Tide | 9:17PM0.47m | 9:14AM0.68m | 9:13PM0.48m | 9:28AM0.85m | 9:08PM0.47m | 8:35AM1.01m | 9:07PM0.45m | 9:11PM0.43m | 9:20PM0.42m | 9:28PM0.43m | |||||||||||
7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | |
— | 5:34 | — | — | 5:35 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 14 | 5 | 1 | 4 | — | — | — |
Temp °C | 12 | 12 | 10 | 14 | 13 | 12 | 15 | 14 | 12 | 17 | 17 | 17 | 14 | 11 | 13 | 13 | 12 | 11 | 14 | 14 | 13 |
Feels °C | 8 | 9 | 8 | 12 | 10 | 9 | 12 | 12 | 11 | 13 | 13 | 14 | 9 | 6 | 8 | 7 | 3 | 2 | 9 | 9 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 11 | SSW 10 | SSW 9 | SSW 14 | SSW 17 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SW 15 | SW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SW 16 | SSW 14 | SW 13 | SSW 17 | SSW 16 |
1106 | 853 | 532 | 211 | 294 | 1032 | 729 | 853 | 1386 | 1423 | 1103 | 1863 | 1498 | 1368 | 1087 | 763 | 1018 | 774 | 3588 | 6602 | 3868 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 20 | SSW 14 | SSW 8 | SW 13 | S 8 | S 8 | S 5 | SW 19 | SSW 18 | SW 18 | — | — | — | E 5 | SW 24 | SSW 20 | SSW 17 | — | — |
291 | 223 | 280 | 264 | 118 | 170 | 20 | 33 | 14 | 518 | 572 | 154 | — | — | — | 1 | 23 | 1401 | 2378 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | SW 15 | SSW 15 | SSW 19 | SSW 18 | SSW 8 | S 8 | S 8 | — | SE 6 | S 8 | — | — | — | — | — | — | — | — | — | — |
— | 530 | 45 | 470 | 413 | 44 | 11 | 20 | — | 9 | 4 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | WNW 3 | — | SW 4 | — | NW 6 | NW 3 | N 3 | N 4 | N 4 | NNE 4 | NNW 4 | WSW 6 | WSW 10 | — | WNW 4 | W 6 |
— | — | — | — | — | 4 | — | 12 | — | 9 | 5 | 8 | 33 | 14 | 31 | 36 | 248 | 1602 | — | 8 | 424 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 137 | 0 | 0 | 0 | 0 | 1 | 157 | 0 | 0 | 0 | 0 | 0 | 0 | 518 | 688 | 336 | 404 | 159 | 2 | 577 |
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.











