Knights Surf Break

Lat Long: 35.54° S 138.68° E

Knights Surf Forecast and Surf Report

Issued: 2 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Knights sea temperature is
14.3° C
0.0° 

Knights surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Knights surf forecast from 17 Aug 2026:

  • Best quality surf: Sunday 23 Aug, 12PM (local time) - 7.5ft (2.3m), 17s period, SSW swell with glassy winds.
  • Most powerful swell: Saturday 22 Aug, 6AM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,319 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 9AM (local time) - 3.5ft (1.1m), 17s 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 18) at 9AM. The primary swell is predicted to be 1.1m and 17s period with a secondary swell of 0.9m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Knights in the next 16 days are 2.5m 16s and forecast to arrive on Saturday (Aug 22) 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 1.1m 4s period and expected on Tuesday (Aug 18) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 18th Aug)3.5ft (1.1m) 17s
Best Surf12PM (Sun 23rd Aug)7.5ft (2.3m) 17s
Most Powerful 6AM (Sat 22nd Aug)8ft (2.5m) 16s

Table - best surf conditions forecast for Knights over the next 16 days.


The Lowdown

Alright, surfers, Rusty here. Let’s cut through the noise and get into what’s actually going to be worth your time over the next couple of weeks.

The long and short of it is this: we’ve got a real window of opportunity opening up after a bit of a messy, unsettled start. The energy is definitely there, but we have to be patient and pick our moments. The first week is a mixed bag—some size, but wind and swell direction are going to be fighting us. The standout period looks like next Sunday and Monday, and then again into the following Wednesday. Those are the days you’ll want to clear your schedule for.

The first good window we see is on the morning of Sunday, the 23rd. The wind will be a clean offshore light breeze from the NNE, and we’ve got a solid 7ft SSW groundswell running on a 14-second period. The wave energy is moderate-to-strong at 2530. This is looking like a proper session. Then, in the afternoon, it gets even better. The wind goes glassy, the swell holds at 7ft, and the period bumps up to 16 seconds. That’s a beautiful, clean, powerful combination. The combined energy jumps to 3736, which is distinctly strong. This is the highlight of the run, no question about it. If you’re an experienced surfer, this is the one.

Now, the morning of Monday, the 24th, is still a solid option with glassy conditions and a 5ft SSW swell, but it’s a step down in size and energy from the day before. Still very good, but Sunday is the pick.

Looking further out, the morning of Monday, the 31st, shows a lot of promise. We have a clean 6ft SSW groundswell with a light cross-offshore breeze from the east. It’s a bit further out, so treat it as promising rather than locked in, but the signs are good for some clean, powerful waves. Then, to close things out, the morning of Wednesday, the 2nd of September, is another one to circle. A 6ft SSW swell with a light offshore NNE wind and excellent conditions for experienced surfers. The afternoon looks even better with a 6ft swell turning glassy. That’s a strong way to finish the forecast period.

Let’s be clear about the rest. Between now and that Sunday, it’s mostly about waiting. We’ve got some punchy swell on Thursday and Friday, but it’s accompanied by cross-shore winds and a lumpy, bumpy ocean. Not worth the fight. The weekend gets bigger—up to 8ft on Saturday morning—but the wind is onshore and it’s messy. That’s a pass for me. And for the beginners out there, a lot of this run is going to be too much. Anything over 5ft is pushing it, and we’ll see plenty of that.

Also, a heads-up for the experienced crew: that 7ft swell on Sunday the 23rd is over the 5ft mark, so it’s not for the faint of heart. And when that long-period groundswell hits, keep in mind the break here is a beach and reef setup. Long-period swells like this can be a bit shifty on the beach, so it might be worth looking for the reef to handle the power better.

There’s a bit of a lull in the middle of the second week, around the 26th and 27th, with onshore winds and poor conditions. And right at the very end, on the 29th and 30th, it turns onshore again and gets messy, even with some decent period in the water. That’s a classic case of energy with nowhere good to go.

One more thing – with the water temp sitting at 58°, that’s right on the average for this time of year. So, no surprises there, just get the right rubber on.

So, to sum it up: be patient, let the slop pass, and nail those windows on the 23rd and the 31st, and into the 2nd of September. That’s where the magic is.

Stay stoked.

Rusty

Short Range Forecast

Light rain (total 5mm), mostly falling on Tue night. Very mild (max 18°C on Tue afternoon, min 12°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 16°C on Sun morning, min 12°C on Fri night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
0
0
4
2
2
3
3
2
3
3
2
4
4
5
4
3
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SSW
17
1
SSW
17
1
SSW
16
0.8
SSW
16
0.8
SSW
15
1.6
SW
13
1.6
SW
13
1.3
SW
13
1.3
SSW
16
1.7
SW
14
1.7
SW
14
2.5
SSW
16
2.5
SSW
16
2.4
SSW
16
2.4
SSW
14
2.1
SSW
14
2.1
SSW
16
1.8
SSW
15
1.6
SSW
14
1.4
SSW
14
1.2
SSW
13
Wave Graph
Metric surfscale
Energy kJ
742
573
519
314
279
878
878
591
759
1170
1105
2911
3237
2756
2317
1653
2285
1487
982
742
458
Wind (km/h)
25
NNE
15
N
20
N
25
NW
25
WNW
10
NW
20
WNW
20
WNW
10
WNW
15
W
15
WSW
10
WNW
15
WSW
10
SW
5
ESE
10
NNE
5
W
5
N
5
W
5
WNW
10
NW
Wind State
off
cross-off
off
cross-off
cross
cross-off
cross
cross
cross
cross
cross-on
cross
cross-on
on
glassy
off
glassy
cross-off
glassy
cross
cross-off
High Tide
2:43PM0.98m
3:42AM1.07m
2:47PM0.96m
4:20AM1.07m
2:36PM0.94m
5:04AM1.04m
6:12AM0.99m
11:23AM1.13m
11:44AM1.18m
00:40AM0.59m
Low Tide
8:41PM0.37m
9:04AM0.70m
8:53PM0.38m
9:14AM0.83m
9:03PM0.40m
8:38AM0.94m
9:06PM0.42m
7:35AM0.99m
9:02PM0.45m
8:54PM0.45m
8:42PM0.45m
part cloud
rain showers
rain showers
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
rain showers
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:50
6:50
6:48
6:48
6:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:44
5:45
5:45
5:46
5:46
5:47
5:49
 mm
1
4
1
1
Temp °C
17
18
14
15
15
13
15
16
13
14
14
14
15
14
13
16
16
14
14
14
12
Feels °C
13
15
11
9
10
11
11
12
11
10
11
12
12
12
12
14
15
13
13
13
10
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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