Knights Surf Break

Lat Long: 35.54° S 138.68° E

Knights Surf Forecast and Surf Report

Issued: 8 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Knights sea temperature is
13.9° C
0.5° 

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


Knights surf forecast from 9 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 9AM (local time) - 13ft (4.0m), 16s period, SW swell with cross-shore winds.
  • Most powerful swell: Monday 10 Aug, 6AM (local time) - 11ft (3.5m), 19s period, SSW swell with 9,000 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 12AM (local time) - 8ft (2.4m), 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 2.4m and 16s period with a secondary swell of 0.7m and 7s. 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 3.5m 19s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 11) at 12PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 11th Aug)8ft (2.4m) 16s
Best Surf 9AM (Wed 12th Aug)13ft (4.0m) 16s
Most Powerful 6AM (Mon 10th Aug)11ft (3.5m) 19s

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. This is a beach-and-reef setup, advanced level, and it’s fairly consistent, so it’s got potential. The water temperature is sitting at 57°, which is about average for the time of year, no surprises there.

The first worthwhile window is Sunday morning, 9th August. We’ve got a 4ft SSW swell rolling in with a 14-second period, and a light N cross-off breeze. It’s clean, but the energy is moderate (720). It’s a bit marginal, but it’s a start. The real standout on Sunday is the afternoon. The swell gets a little bump to 5ft from the SSW, period jumps to 16 seconds, and the wind swings to a light NNW cross-off. The combined energy kicks up to 2168, and the report says it’s excellent for experienced surfers. That’s the pick of the first week.

Monday 10th August is a write-off. The swell jumps to 12ft, period is 18 seconds, but the wind is howling onshore from the SW at 30 km/h, and the energy is massive (12829). It’s messy and too big for most. Tuesday 11th is better, with the swell dropping to 6ft, period 14 seconds, and clean NNW cross-off winds. The energy is moderate (1389), but the conditions are clean. That’s a solid option for a surf.

Wednesday 12th August morning is a hard pass. The swell is 13ft from the SW with a 16-second period, and the wind is cross-shore from the W. The report says it’s too big for this break, and the energy is 14563. That’s for experts only or maybe kite surfers. The rest of the week into the weekend is a mix of 8ft to 10ft SSW swell with cross-on winds, so it’s choppy and not worth getting excited about.

Now, looking into the second week, things get interesting again. Monday 17th August morning has a 4ft SSW swell, 13-second period, and a light NE cross-off breeze. The energy is moderate (897), and it’s clean. Tuesday 18th August is where it’s at. The morning is 3ft, 18-second period, with a NE offshore wind – light and clean, energy 1134. The afternoon is even better: 5ft, 18-second period, with a NNE glassy wind. The energy is 1735, and it’s glassy. That’s a standout for the second week. Wednesday 19th stays clean with 5ft, 16-second period, and offshore winds.

Friday 21st August morning is another gem: 4ft, 14-second period, glassy SW wind, energy 1859. Saturday 22nd August morning is also clean with 6ft, 14-second period, NNE offshore wind, energy 1370. The last few days of the forecast, 23rd and 24th, see the swell building back to 7ft to 10ft, but the winds are cross-on and choppy, so not ideal.

Overall, the best on offer is Sunday afternoon 9th August and Tuesday 18th August. The Sunday afternoon session has that 5ft SSW groundswell with a 16-second period and clean cross-off winds – excellent quality. Tuesday 18th August has the glassy, offshore conditions with a 5ft, 18-second groundswell. That’s the kind of session you wait for.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Sun afternoon. Very mild (max 16°C on Sun morning, min 9°C on Tue night). Winds decreasing (fresh winds from the SSW on Sun night, light winds from the WNW by Mon night).

Days 4-6 Weather Summary

Some drizzle, heaviest during Wed afternoon. Very mild (max 15°C on Thu morning, min 11°C on Wed night). Wind will be generally light.

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
4
0
0
0
4
2
2
2
!
0
4
2
3
4
4
3
4
2
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
SSW
14
1.5
SSW
16
2.5
SW
19
3.5
SSW
18
3
SW
17
2.4
SSW
16
1.8
SSW
14
1.6
SSW
14
3
SW
16
4
SW
16
4
SW
17
3
SSW
16
3
SSW
15
3
SSW
15
3
SSW
15
3
SSW
16
3
SSW
16
2.5
SSW
16
2.5
SSW
15
2.2
SSW
15
2
SSW
14
Wave Graph
Metric surfscale
Energy kJ
607
1141
5125
8187
5769
2827
1389
1057
4899
8568
8689
4410
3899
3629
3678
4340
3623
3170
2777
2119
1624
Wind (km/h)
20
N
10
NNW
30
SSW
30
SW
25
WSW
15
NW
30
NNW
25
NNW
20
WSW
20
W
25
WSW
15
W
15
W
15
W
10
W
10
W
10
SSW
10
SSE
15
SSE
15
SSE
5
E
Wind State
cross-off
cross-off
on
on
cross-on
cross-off
cross-off
cross-off
cross-on
cross
cross-on
cross
cross-on
cross-on
cross
cross
on
cross-on
cross-on
cross-on
cross-off
High Tide
11:49AM1.29m
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
Low Tide
9:20PM0.42m
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
rain showers
thunderstorm
rain showers
part cloud
cloud
part cloud
part cloud
part cloud
rain showers
clear
rain showers
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:03
7:01
7:01
6:58
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:37
5:38
5:39
5:40
5:40
5:42
 mm
1
4
4
3
1
Temp °C
16
15
13
13
12
12
14
15
13
14
13
12
15
15
14
15
14
13
13
12
13
Feels °C
13
13
8
7
7
7
8
9
7
8
8
9
11
12
12
12
11
12
8
8
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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