Surf Forecasts:
Knights surf forecast from 28 Aug 2026:
- Best quality surf: Saturday 5 Sep, 3AM (local time) - 11ft (3.5m), 15s period, SW swell with cross-shore winds.
- Most powerful swell: Saturday 5 Sep, 6AM (local time) - 13ft (4.0m), 15s period, SW swell with 7,043 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 9AM (local time) - 5ft (1.5m), 14s 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 Saturday (Aug 29) at 9AM. The primary swell is predicted to be 1.5m and 14s 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 15s and forecast to arrive on Saturday (Sep 05) at 6AM. Winds are predicted to be cross-onshore 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 (Sep 01) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 29th Aug) | 5ft (1.5m) 14s |
| Best Surf | 3AM (Sat 5th Sep) | 11ft (3.5m) 15s |
| Most Powerful | 6AM (Sat 5th Sep) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Knights over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s coming.
We’ve got a solid run of surf at Knights, a beach and reef setup that’s mostly for the advanced crew. The water temperature is sitting at 57.6°F, which is right about average for this time of year – nothing unusual.
The pattern kicks off on Saturday the 29th of August with a clean morning. We’re looking at a 5-foot SSW swell, 14-second period, and that cross-off breeze from the ENE at just 3 mph. It’s clean, it’s got energy, and the combined wave energy is moderate at 934. Not a standout, but a nice way to get wet. The afternoon turns a bit cross-on and the swell drops off slightly, so morning is the call.
Sunday the 30th is similar, with a slightly bigger 5.2-foot SSW swell in the morning, still clean with that light ENE cross-off. The combined energy jumps to 1055, so it’s got a bit more punch. Again, the afternoon gets messy with the wind switching cross-on. Keep it to the mornings.
Monday the 31st of August is where it starts to get interesting. Morning sees a 6.6-foot SSW groundswell with a 15-second period and a light NE cross-off wind. The wave energy is strong at 3348, and conditions are clean. This is a legit option for experienced surfers. The afternoon is even better, with the swell bumping up to 7.9 feet, period stretching to 18 seconds, and still that nice cross-off wind. The energy jumps to 3375. But with that long period and a beach-and-reef setup, it might break a bit straight at the beach, so the reef sections could be the go-to. This is the best on offer in the first week.
The first week’s best: Monday the 31st of August, morning or afternoon, with that 18-second groundswell and clean conditions. It’s a true standout.
Now, Tuesday the 1st of September gets a bit trickier. The swell drops to 5.9 feet, but the wind swings to a strong NNW at 16 mph. It’s cross-off, so it’s clean, but the energy is still moderate at 1527. The afternoon is similar with a fresh breeze. It’s rideable but not the pick.
Wednesday the 2nd and Thursday the 3rd of September both bring cross-shore winds and increasingly messy conditions. The swell stays around 4.9 feet to 8.2 feet, but the wind is doing no favours. Thursday even sees an 8.2-foot SW swell with a 14-second period, but the cross-shore chop makes it a struggle. The energy is strong (2633 – 2725), but the quality is poor.
Friday the 4th of September offers a brief return to clean conditions with a moderate cross-off breeze from the north. The swell is 7.2 feet to 7.5 feet, period around 14-15 seconds, and energy is strong (1852-2207). Not a standout, but better than the previous days.
Saturday the 5th of September gets ugly. The swell jumps to 13.1 feet, but the wind is howling from the WSW at 22 mph, cross-on, and the energy is extreme at 5710. This is a write-off for paddle surfing – it’s more of a kite-surfing setup if you’re into that. The afternoon is still 9.8 feet and messy.
Sunday the 6th and Monday the 7th of September are a washout. Strong winds, messy cross-shore conditions, and the swell is too big and poorly aligned. On Monday afternoon, the swell hits 13.1 feet with a SW direction and 16-second period, energy at a massive 15315, but the wind is howling at 28 mph. It’s too big and too windy for any kind of quality session.
Tuesday the 8th of September is still big, with a 9.8-foot SSW swell, but the wind is onshore from the south in the morning, making it poor. The afternoon is a bit better with a gentle cross-on breeze, but it’s still choppy.
Now, the second week brings a real banger. Wednesday the 9th of September is the highlight of the whole 16-day window. Morning: 9.8-foot SSW swell, 18-second period, light NNW cross-off breeze at 3 mph, and extreme energy at 5747. The afternoon is glassy, with a 9.8-foot, 17-second groundswell, and a slight south wind. It’s exceptional for experts. The long period means it’ll be best on the reef sections, not the beach
Short Range ForecastMostly dry. Very mild (max 19°C on Mon afternoon, min 10°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Tue afternoon, min 11°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 14 | SSW 13 | SSW 13 | 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 14 | SW 14 | SSW 13 | SSW 14 | SSW 15 | SSW 15 |
Wave Graph | |||||||||||||||||||||
934 | 669 | 640 | 799 | 1152 | 1442 | 1883 | 3375 | 2285 | 1527 | 1052 | 829 | 1040 | 1811 | 2708 | 2633 | 2725 | 1887 | 1852 | 2207 | 2580 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | glassy | cross-off | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross |
High Tide | 1:33PM1.12m | 1:37AM0.86m | 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 | ||||||||
Low Tide | 7:49PM0.35m | 7:09AM0.27m | 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 | ||||||||
6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | |
— | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 3 |
Temp °C | 15 | 14 | 12 | 14 | 13 | 11 | 17 | 19 | 16 | 19 | 20 | 17 | 14 | 15 | 13 | 16 | 16 | 13 | 18 | 20 | 15 |
Feels °C | 12 | 12 | 12 | 12 | 10 | 10 | 15 | 17 | 14 | 13 | 14 | 15 | 10 | 10 | 8 | 12 | 12 | 11 | 12 | 15 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 13 | 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 14 | SW 14 | SSW 13 | SSW 14 | SSW 15 | SSW 15 |
934 | 669 | 640 | 799 | 1152 | 1442 | 1883 | 3375 | 2285 | 1527 | 1052 | 829 | 1040 | 1811 | 2708 | 2633 | 2725 | 1887 | 1852 | 2207 | 2580 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 23 | SSW 21 | SSW 20 | SSW 20 | SSW 18 | SSW 19 | — | — | — | — | SSW 18 | — | — | — | — | — | — | — | — | — |
— | 52 | 178 | 256 | 256 | 491 | 913 | — | — | — | — | 126 | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | S 19 | — | — | — | SW 22 | SW 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 7 | — | — | — | 119 | 552 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | N 3 | NW 4 | W 3 | SW 5 | SW 6 | — | — | — | NW 4 | N 3 | NNE 3 | W 5 |
— | — | — | — | — | — | — | — | — | 4 | 20 | 5 | 65 | 43 | — | — | — | 4 | 4 | 6 | 77 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 164 | 0 | 0 | 164 | 0 | 0 | 0 | 0 | 342 | 404 | 2 | 448 | 159 | 404 | 159 | 2 | 0 | 1 | 100 | 404 |
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.











