
Surf Forecasts:
Knights surf forecast from 10 Aug 2026:
- Best quality surf: Thursday 13 Aug, 3AM (local time) - 11ft (3.5m), 16s period, SSW swell with cross-shore winds.
- Most powerful swell: Friday 14 Aug, 6AM (local time) - 13ft (4.0m), 18s period, SSW swell with 8,707 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 12AM (local time) - 7.5ft (2.3m), 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 Tuesday (Aug 11) at 12AM. The primary swell is predicted to be 2.3m and 16s period. 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 4.0m 18s and forecast to arrive on Friday (Aug 14) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Aug 11) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 11th Aug) | 7.5ft (2.3m) 16s |
| Best Surf | 3AM (Thu 13th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 6AM (Fri 14th Aug) | 13ft (4.0m) 18s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, Rusty here again, lookin’ at the same stretch of time for the Knights break, but in feet and miles per hour. It’s a bumpy start, I gotta tell ya.
The first few days are a total wash. The ocean’s angry and messy, so don’t get your hopes up. Water temp is right about 58°F, which is normal for this time of year.
Monday 10th through Wednesday 12th: Forget paddling. We’re looking at waves between 10 and 12 feet from the SSW, but the wind is just ruining it. It’s a strong, messy cross-onshore breeze. The energy in the water is massive – we’re talking between 9,629 and 12,511 units of raw power – but it’s all just chop and chaos. This is kite-surfing territory, not paddle surfing.
Thursday 13th and Friday 14th: Now we’re talking, but only for the pros. The swell is still massive at 10 to 12 feet from the SSW. The wind finally dies down to a light breeze. On Thursday morning, the wind is cross-shore, which is decent, but the size is intimidating. This is only for experts. The energy is still hefty, and with a period of about 16 seconds, these are big, powerful groundswell lines. Friday has a light onshore wind, but it’s still too big for the average surfer. Thursday morning is the early standout – big, manageable for the brave, but scary for everyone else.
Saturday 15th and Sunday 16th: The swell drops to a more reasonable 6 to 8 feet. Winds are light but cross-onshore, so the surface gets a little bumpy. It’s surfable, but nothing to write home about.
Monday 17th to Wednesday 19th: This is the sweet spot. The swell drops to 3 to 4 feet, and the wind turns offshore. We get clean, glassy conditions. The best day is Tuesday 18th. You’ve got a gentle offshore breeze from the NE, with a 3-foot SSW swell. The period is a super long 19 seconds, so the waves will have that slow, grinding, perfect shape. The combined energy is moderate (1,816), but the quality will be top-notch for the experienced surfer looking for a clean session.
Thursday 20th: Small, weak, nothing to get excited about.
Friday 21st: The morning is glassy with tiny 3-foot waves. But the afternoon turns on. The wind goes light cross-off, and the swell jumps to 8 feet from the SW. The period drops to 10 seconds, so it’s a bit more of a pushy swell, but the wind is clean. A good option for the big-wave crew.
Saturday 22nd into the final week: The long-range forecast shows a big groundswell from the SW and SSW moving in for the 23rd and 24th, with waves from 8 feet all the way up to a colossal 15 feet. The wind is predicted to be strong and onshore on the 24th, which will trash it. The 23rd might be okay with a cross-off wind, but it’s a beast. This is a promising but uncertain call for the end of the run.
The Standout: No question, the best of the bunch is Tuesday 18th of August. The size is small at 3 feet, but the combination of a perfect offshore breeze, a super long 19-second period from the SSW, and clean conditions will deliver some beautiful, peelable waves. This is the one to circle on the calendar.
- Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Very mild (max 15°C on Tue morning, min 11°C on Mon afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Thu morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 18 | SSW 17 | SSW 16 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 |
Wave Graph | |||||||||||||||||||||
7659 | 5582 | 2629 | 1389 | 1057 | 2834 | 5702 | 5258 | 4729 | 5577 | 4122 | 4515 | 8011 | 5570 | 3669 | 3283 | 3023 | 2285 | 1676 | 1382 | 850 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross-on | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross-off | cross | cross-on | cross |
High Tide | 12:17PM1.35m | 1:19AM0.55m | 12:44PM1.37m | 00:58AM0.58m | 1:09PM1.34m | 1:01AM0.63m | 1:30PM1.27m | 1:16AM0.71m | 1:49PM1.20m | 1:38AM0.81m | 2:06PM1.12m | 2:04AM0.90m | 2:20PM1.06m | 2:35AM0.98m | |||||||
Low Tide | 9:28PM0.43m | 9:32PM0.46m | 4:36AM0.47m | 9:25PM0.50m | 5:36AM0.40m | 9:03PM0.52m | 6:23AM0.35m | 8:38PM0.51m | 7:03AM0.35m | 8:25PM0.47m | 7:39AM0.39m | 8:23PM0.43m | |||||||||
7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | |
— | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | |
mm | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 12 | 15 | 14 | 15 | 13 | 13 | 11 | 15 | 15 | 14 | 15 | 14 | 13 | 12 | 13 | 12 | 12 | 13 | 13 |
Feels °C | 7 | 7 | 8 | 8 | 8 | 10 | 8 | 8 | 8 | 11 | 12 | 12 | 12 | 11 | 11 | 9 | 9 | 8 | 8 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 18 | SW 17 | SSW 16 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 |
4852 | 4047 | 2629 | 1389 | 1057 | 2834 | 5702 | 5258 | 4729 | 5577 | 4122 | 4515 | 8011 | 5570 | 3669 | 3283 | 3023 | 2285 | 1676 | 1382 | 850 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SSE 6 | SSW 18 | — | SW 19 | WSW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | 7 | 623 | — | 184 | 497 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 18 | SSW 17 | — | NW 4 | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 5 |
7659 | 5582 | — | 15 | 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 64 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 585 | 788 | 0 | 3 | 404 | 577 | 870 | 585 | 2 | 2 | 2 | 1 | 2 | 100 | 137 | 137 | 137 | 0 | 0 | 137 | 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.











