Surf Forecasts:
Knights surf forecast from 29 Aug 2026:
- Best quality surf: Thursday 3 Sep, 9PM (local time) - 11ft (3.5m), 15s period, SSW swell with glassy winds.
- Most powerful swell: Friday 4 Sep, 12AM (local time) - 13ft (4.0m), 17s period, SSW swell with 8,191 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 9AM (local time) - 5ft (1.6m), 13s 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 Sunday (Aug 30) at 9AM. The primary swell is predicted to be 1.6m and 13s 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 4.0m 17s and forecast to arrive on Friday (Sep 04) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Sep 05) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sun 30th Aug) | 5ft (1.6m) 13s |
| Best Surf | 9PM (Thu 3rd Sep) | 11ft (3.5m) 15s |
| Most Powerful | 12AM (Fri 4th Sep) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
We’ve got a solid run of surf coming our way at Knights, a beach and reef setup that’s strictly for the advanced crew. The water temp is sitting at 58°F right now, which is pretty much normal for this time of year.
The real action kicks off Sunday morning, August 30th. It’s clean, clear skies, and a light cross-off breeze from the ENE (3 mph). The swell is a tidy 5ft from the SSW, with a long 13-second period. The energy is moderate (1055), and the conditions are excellent for experienced surfers. It’s a solid start, but the crowd meter says “often,” so expect some company.
Monday, August 31st is the absolute standout. The morning is clean with offshore winds from the NE (6 mph), and the swell jumps to 7ft from the SSW, with a 15-second period. The energy is now strong (2796). But the afternoon? Glassy. Flat calm. NE wind drops to 3 mph, and the swell pushes to 8ft, going 18 seconds. That’s a very long period groundswell, with strong energy (3375). This is going to be proper, but remember, that long period at a beach and reef break can make it a bit straight. For the experienced surfer, it’s a dream window.
Tuesday morning, September 1st is still clean, but that NNW wind jumps to 22 mph, so it’s a cross-off but a fresh breeze. The swell drops to 6ft (16 seconds, energy 1379). It’s still surfable but the wind is strong. The afternoon gets lumpy.
From Wednesday, September 2nd through to the end of the first week, it gets messy. Swell stays in the 7ft to 8ft range, but the wind is cross or cross-on, and the reports are marginal. Not the time to get excited.
Friday, September 4th is a big one, but it’s a warning. The morning shows an 12ft swell from the SSW (16 seconds, 5297 energy). That’s very strong, and the wind is a clean cross-off from the N. But it’s too big for this break. Only for the absolute experts, if anyone. The afternoon is 10ft, still big.
The weekend of September 5th and 6th is a write-off. Saturday is rainy, choppy, and onshore. Sunday gets a bit cleaner with a 7ft swell, but it’s cross-shore.
Monday, September 7th and Tuesday, September 8th are poor, with rain and strong onshore winds. Not worth paddling out.
Thursday, September 10th sees a return to form. Morning is clean, offshore from the NE (6 mph), with a 5ft SSW swell (14 seconds, 1233 energy). Excellent for experienced surfers.
Friday, September 11th is another one to circle. The morning is clean, offshore from the NNE (6 mph), with a 6ft swell from the SSW, hitting a very long 19-second period. The energy is strong (3290). That’s a proper groundswell, and it’s going to be clean. This is a standout for the second week.
Saturday, September 12th and Sunday, September 13th keep the good vibes going. Saturday morning is clean with a 6ft swell (16 seconds) and a light offshore. Saturday afternoon is glassy. Sunday is clean again with a 5ft swell. The pattern holds.
Monday, September 14th looks like a dud with rain and strong onshore winds.
So, for the best of the best, Monday, August 31st (afternoon glass) and Friday, September 11th (long period groundswell, clean) are the true standouts. Keep your eyes on the forecast for those, though the long-range stuff is a bit less certain.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Mon afternoon, min 10°C on Sun morning). Winds increasing (calm on Sun night, fresh winds from the NW by Tue morning). | Days 4-6 Weather SummaryHeavy rain (total 26mm), heaviest during Fri night. Very mild (max 17°C on Fri morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 13 | SSW 13 | SSW 14 | SSW 15 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 15 | SW 14 | SW 13 | SSW 13 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SW 15 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 799 | 1044 | 1376 | 1883 | 3375 | 2285 | 1379 | 936 | 1001 | 2008 | 2842 | 2885 | 2345 | 2615 | 8191 | 5297 | 3929 | 2446 | 2061 | 3660 | 1409 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | glassy | off | glassy | cross-off | cross-off | cross-off | cross-on | cross | cross | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on |
High Tide | 1:53PM1.06m | 2:01AM0.95m | 2:12PM1.00m | 2:28AM1.04m | 2:26PM0.94m | 2:57AM1.11m | 2:31PM0.88m | 3:29AM1.14m | 2:17PM0.85m | 4:04AM1.13m | 12:35PM0.87m | 4:47AM1.08m | |||||||||
Low Tide | 7:52PM0.34m | 7:43AM0.31m | 7:55PM0.34m | 8:15AM0.41m | 7:59PM0.34m | 8:46AM0.54m | 8:03PM0.33m | 9:12AM0.69m | 8:08PM0.32m | 9:13AM0.85m | 8:14PM0.31m | 8:22AM0.97m | 8:22PM0.31m | ||||||||
 | |  | | | |  | |  | | | |  | | |  | |  | | | | |
 | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — |
 | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | 5 | 19 | 2 | — | — |
Temp °C | 15 | 14 | 11 | 17 | 19 | 16 | 19 | 19 | 14 | 14 | 14 | 13 | 15 | 15 | 13 | 17 | 15 | 16 | 15 | 13 | 12 |
Feels °C | 13 | 11 | 10 | 14 | 17 | 13 | 12 | 14 | 12 | 9 | 9 | 8 | 11 | 12 | 12 | 13 | 13 | 14 | 9 | 6 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 14 | SSW 15 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 15 | SW 14 | SW 13 | SSW 13 | SSW 17 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | — | SSW 15 |
| kJ | 799 | 1044 | 1376 | 1883 | 3375 | 2285 | 1379 | 936 | 1001 | 2008 | 2842 | 2885 | 2345 | 2615 | 8191 | 5297 | 3929 | 2446 | 2061 | — | 1409 |
Swell 2 Height (m) Direction Period (s) | SSW 20 | SSW 20 | SSW 18 | SSW 19 | — | — | — | — | SSW 18 | — | — | — | — | — | — | — | — | — | — | — | SW 20 |
| kJ | 256 | 256 | 491 | 913 | — | — | — | — | 126 | — | — | — | — | — | — | — | — | — | — | — | 97 |
Swell 3 Height (m) Direction Period (s) | — | — | SW 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 119 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NW 4 | NW 4 | SW 4 | SW 6 | — | — | — | — | — | — | — | NNW 5 | WSW 4 | SW 15 | SW 7 |
| kJ | — | — | — | — | — | — | 18 | 28 | 28 | 75 | — | — | — | — | — | — | — | 57 | 28 | 3660 | 349 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 164 | 0 | 0 | 0 | 0 | 577 | 2 | 411 | 159 | 2 | 2 | 578 | 474 | 1 | 1 | 1 | 2 | 577 | 591 | 2 |
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)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Knights surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest