
Surf Forecasts:
Knights surf forecast from 31 Jul 2026:
- Best quality surf: Saturday 1 Aug, 12AM (local time) - 4.5ft (1.3m), 13s period, SSW swell with offshore winds.
- Most powerful swell: Monday 3 Aug, 9AM (local time) - 10ft (3.0m), 14s period, SW swell with 3,326 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 6PM (local time) - 4.5ft (1.3m), 12s 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 31) at 6PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.6m and 20s. 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 3.0m 14s and forecast to arrive on Monday (Aug 03) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 4s period and expected on Sunday (Aug 02) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 31st Jul) | 4.5ft (1.3m) 12s |
| Best Surf | 12AM (Sat 1st Aug) | 4.5ft (1.3m) 13s |
| Most Powerful | 9AM (Mon 3rd Aug) | 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 been cookin’ at Knights.
The forecast starts Friday, July 31st. We’ve got a solid run of surf coming through, with a few absolute gems in the mix. Right off the bat, the water temp is sitting at 57.6°F, which is about normal for this time of year, so nothin’ weird there.
Friday morning kicks off with a clean 5ft SSW swell, period a decent 12 seconds, and a light NNE offshore breeze. It’s a good start, and the afternoon holds up with 4.6ft, still clean with a cross-off breeze. The wave energy is moderate (732) then picking up a bit (936).
Now, the real standout is Saturday, August 1st. This is where it gets serious. The morning is glassy, 5.9ft of SSW groundswell, that offshore wind from the NNE, and the period jumps to a very long 17 seconds. The energy is strong (1905). The afternoon gets even better – 6.9ft, same long-period swell, crystal clear skies, and a light NW cross-off. This is excellent, clean, powerful surf for experienced surfers. This is the best on offer.
Sunday, August 2nd, the wind picks up to a moderate 25 km/h from the NNW, making it a cross-off, but the 5.9ft swell and 16-second period still hold energy (1586), though the quality slips a bit. By afternoon, the wind turns cross-shore and the forecast gets marginal.
Monday, August 3rd, is a write-off. Onshore winds, choppy, and the swell jumps to 9.8ft with poor conditions. The energy is high (2718), but it’s messy.
Tuesday, August 4th, is a recovery day. Light cross-on winds, 6.6ft dropping to 5.6ft. Still marginal.
Then, Wednesday, August 5th, is a serious surprise. A tiny 3ft swell, but with a 19-second period and glassy conditions in the morning, then glassy in the afternoon. The energy is moderate (1159, 1052). This is a clean, long-period groundswell – perfect for a reef or point, and at Knights, that’ll be a fun, mellow session. A real hidden gem.
Thursday, August 6th, brings back some size with 4.6ft to 5.2ft, 16-second period, and clean cross-off winds. Another excellent day.
Friday, August 7th, is a ripper. Morning has 4.9ft, 15-second period, and a clean offshore from the N. The energy is very strong (2419). The afternoon stays clean with a 5.9ft, 17-second groundswell.
Saturday, August 8th, has a glassy afternoon with 5.9ft from the SW, 15 seconds. Clean.
Sunday, August 9th, is a mixed bag. Morning has a cross-off wind and 5.9ft, but the afternoon is a mess with a fresh cross-shore and a 35 km/h wind. The energy is still there, but quality drops.
Monday, August 10th, is for experts only. The swell hits 11.5ft with a 13-second period and a 30 km/h cross-off wind. The energy is massive (5380). The forecast says it’s too big for this break. The afternoon is a total blowout with 40 km/h winds.
Tuesday, August 11th, still has big, powerful swell (9.8ft, 16 seconds, energy 4355), but the wind is a fresh cross-shore, making it lumpy. This is a kite-surfing day if anything.
The rest of the outlook from Wednesday, August 12th, through Friday, August 15th, shows a mix of moderate to large swell, but mostly onshore or cross-shore winds, keeping the quality low. The best of that late run is Saturday, August 15th, with a 8.2ft SSW groundswell, 18-second period, and a clean cross-off wind from the NNW.
So, to boil it down: Saturday, August 1st is the absolute standout – big, clean, long-period groundswell, light winds, and a full day of it. The glassy surprise on Wednesday, August 5th is a close second for the sheer quality of the wave. The rest is a mix of good and forgettable, with a few big, windy days for the brave.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun afternoon. Very mild (max 14°C on Sat morning, min 9°C on Fri night). Winds increasing (light winds from the ENE on Fri afternoon, fresh winds from the NW by Sun morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Thu morning, min 7°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 13 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 10 | SSW 14 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph | ||||||||||||||||||||
579 | 587 | 1900 | 2521 | 2402 | 1586 | 1487 | 1225 | 3326 | 2591 | 1573 | 1041 | 724 | 451 | 687 | 503 | 1108 | 674 | 993 | 1314 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | on | on | glassy | cross-off | off | cross | off | off | cross-off | off |
High Tide | 1:56AM0.71m | 2:19PM1.22m | 2:23AM0.78m | 2:41PM1.16m | 2:51AM0.86m | 3:01PM1.10m | 3:23AM0.95m | 3:16PM1.03m | 3:59AM1.01m | 3:20PM0.96m | 4:39AM1.06m | 2:51PM0.93m | ||||||||
Low Tide | 9:01PM0.41m | 6:58AM0.30m | 9:05PM0.41m | 7:33AM0.33m | 9:11PM0.43m | 8:09AM0.41m | 9:15PM0.45m | 8:43AM0.53m | 9:17PM0.47m | 9:14AM0.68m | 9:13PM0.48m | 9:28AM0.85m | 9:08PM0.47m | |||||||
— | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | |
5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:35 | — | |
mm | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 11 | 14 | 14 | 12 | 13 | 11 | 12 | 12 | 13 | 11 | 12 | 11 | 10 | 13 | 13 | 12 | 16 | 17 | 14 |
Feels °C | 9 | 8 | 10 | 10 | 8 | 5 | 6 | 7 | 7 | 8 | 7 | 9 | 9 | 8 | 10 | 10 | 8 | 13 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 13 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 10 | SSW 14 | SSW 14 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
579 | 587 | 1900 | 2521 | 2402 | 1586 | 1487 | 1225 | 2155 | 2591 | 1573 | 1041 | 724 | 451 | 687 | 328 | 1108 | 674 | 993 | 1314 | |
Swell 2 Height (m) Direction Period (s) | SSW 20 | SSW 18 | SSE 7 | — | — | — | — | SW 18 | — | — | SSW 18 | SSW 16 | SSW 16 | SSW 20 | SSW 19 | SSW 18 | SW 17 | S 7 | S 8 | SW 20 |
336 | 404 | 5 | — | — | — | — | 80 | — | — | 273 | 177 | 220 | 280 | 578 | 503 | 553 | 16 | 12 | 322 | |
Swell 3 Height (m) Direction Period (s) | S 8 | SSE 8 | — | — | — | — | — | — | — | — | — | SSW 16 | SSW 15 | SSW 15 | SSW 8 | SSW 8 | S 7 | SW 20 | — | WSW 20 |
33 | 19 | — | — | — | — | — | — | — | — | — | 469 | 480 | 45 | 118 | 92 | 39 | 61 | — | 346 | |
Wind waves Height (m) Direction Period (s) | — | SE 6 | NNE 3 | — | N 3 | NW 4 | W 5 | SW 10 | SW 14 | — | — | — | — | — | NE 3 | NE 3 | — | NE 3 | — | SE 8 |
— | 11 | 4 | — | 11 | 31 | 61 | 918 | 3326 | — | — | — | — | — | 4 | 3 | — | 2 | — | 17 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 502 | 2 | 404 | 577 | 498 | 137 | 137 | 157 | 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.











