Knights Surf Break

Lat Long: 35.54° S 138.68° E

Knights Surf Forecast and Surf Report

Issued: 2 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Knights sea temperature is
14.2° C
0.1° 

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


Knights surf forecast from 18 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 6AM (local time) - 4.5ft (1.4m), 14s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 22 Aug, 3AM (local time) - 8ft (2.5m), 16s period, SSW swell with 2,948 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 9PM (local time) - 4ft (1.2m), 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 18) at 9PM. The primary swell is predicted to be 1.2m and 16s period with a secondary swell of 0.1m and 7s. 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 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Aug 19) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Tue 18th Aug)4ft (1.2m) 16s
Best Surf 6AM (Thu 20th Aug)4.5ft (1.4m) 14s
Most Powerful 3AM (Sat 22nd Aug)8ft (2.5m) 16s

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


The Lowdown

Right, let’s have a look at what’s coming up for Knights. The forecast is a bit of a mixed bag, with some real gems buried in there, but you’ll need to be patient and pick your moments.

The next few days are a write-off, to be honest. Tuesday afternoon has some rain and a light cross-off breeze, but the swell is only 3ft from the SSW with a decent 17-second period. The combined energy is moderate at 753, so there’s some push, but the wind state is clean and the score is low. It’s not bad, but it’s not *good* either. Wednesday and Thursday are a mess with strong, gusty winds and poor surf conditions. Friday and Saturday see the swell building, but it’s onshore and choppy, making it a tough paddle for little reward.

Sunday the 23rd morning is where things start to get interesting. That’s the first real standout. The wind goes glassy offshore from the north at just 3 mph, and we’ve got a clean 7ft SSW groundswell with a 14-second period. The combined energy is strong at 2297, so there’s plenty of power. This is excellent for experienced surfers, but at 7ft, it’s too big for beginners. The water temperature is about 58°, which is normal for this time of year. It’s a point-and-reef setup, so that long-period swell will really line up nicely. Crowds are likely here, so get in early.

The following week is a bit of a rollercoaster. There’s a big pulse of swell from the 27th of August right through the 28th, with heights hitting 13ft, but the wind is howling onshore, making it a total mess. That’s a kite-surfing day, not a paddle-surfing day. The 29th of August Saturday morning is a nice reset: clean, cross-off wind from the east at 6 mph, with 8ft SSW swell at 12 seconds. That’s solid, but still for the experienced crew.

The real standout of the whole outlook, though, is Monday the 31st of August morning. The wind is glassy, dead calm from the ENE, and the swell is a solid 7ft from the SSW with a very long 18-second period. The combined energy is 3382, which is strong. That’s a proper groundswell, and at a reef or point break like Knights, it’s going to be epic. The waves will be lined up, with plenty of paddle gaps between sets. This is the best on offer, pure and simple. After that, Tuesday the 1st of September and Wednesday the 2nd of September mornings also look excellent with clean conditions and solid swell, but the 31st is the one to circle.

So, to sum it up: the first week is mostly poor, with a clean window on Sunday the 23rd morning for experienced surfers. Then the end of the month and start of September have a run of clean, powerful swells, with Monday the 31st of August morning being the absolute pick of the bunch. Keep an eye on it, because the forecasts are more reliable closer in.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Tue night. Very mild (max 19°C on Tue afternoon, min 11°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Mon morning, min 11°C on Fri night). Wind will be generally light.

Tue
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
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
0
0
3
2
1
3
2
2
3
2
3
4
4
3
4
2
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSW
17
1
SSW
16
0.8
SSW
16
0.8
SSW
15
0.9
SW
14
1.2
SW
13
1.2
SW
13
1.6
SW
16
1.6
SW
14
1.6
SW
14
2.3
SSW
16
2.4
SSW
16
2.2
SSW
15
2.1
SSW
14
2
SSW
14
2.1
SSW
16
1.7
SSW
15
1.4
SSW
14
1.4
SSW
14
1.5
SSW
13
Wave Graph
Metric surfscale
Energy kJ
573
519
314
279
272
473
466
1333
1079
911
2663
2791
2042
1724
1538
2102
1241
774
752
772
Wind (km/h)
15
NNW
20
NNE
25
NW
25
WNW
10
NW
20
NW
20
WNW
10
WNW
15
WSW
15
SW
10
WNW
10
WSW
10
SW
10
N
5
N
10
WNW
10
NNW
10
WNW
15
W
10
S
Wind State
cross-off
off
cross-off
cross
cross-off
cross-off
cross
cross
cross-on
cross-on
cross
cross-on
on
cross-off
off
cross
cross-off
cross
cross-on
on
High Tide
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
rain showers
rain showers
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
Temp °C
19
14
15
15
13
15
15
13
14
14
13
14
14
12
16
15
13
17
17
12
Feels °C
16
12
10
10
10
10
10
11
10
11
11
12
12
11
14
12
11
14
14
11
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  • 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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