The Knap Surf Break

Lat Long: 51.39° N 3.30° W

The Knap 48 hour detailed Surf Forecast

Issued: 12 pm 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's The Knap sea temperature is
19.4°C
3.3° 

How big are the waves at The Knap today (08 Sep):

  • Morning surf: Morning surf (08 Sep, local time) - 1.5ft (0.5m), 8s period with W swell.
  • Afternoon surf: Afternoon surf (08 Sep, local time) - 2.5ft (0.7m), 5s period with W swell.
  • Evening surf: Evening surf (08 Sep, local time) - 2ft (0.6m), 6s period with W swell.

The current surf forecast for The Knap at 9PM is: 0.6m 6s primary swell from a West direction (forecast issued at 12:00pm September 08). The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (08 Sep)1.5ft (0.5m)8s
Afternoon (08 Sep)2.5ft (0.7m)5s
Evening (08 Sep)2ft (0.6m)6s

Table - waves today at The Knap. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 7mm), mostly falling on Tue morning. Very mild (max 19°C on Thu morning, min 13°C on Tue night). Winds decreasing (fresh winds from the WNW on Tue afternoon, light winds from the W by Wed night).

Tue
8
Wednesday
9
Thursday
10
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
W
8
0.5
W
9
0.7
W
5
0.6
W
6
0.6
W
6
0.6
W
7
0.5
W
7
0.5
W
7
0.5
W
7
0.4
W
7
0.4
W
8
0.3
W
7
0.3
W
7
0.2
W
8
0.2
W
8
0.2
W
8
0.2
W
8
0.1
W
8
0.3
WSW
6
0.4
W
7
0.6
WSW
8
Wave Graph
Metric surfscale
Energy kJ
34
39
25
24
27
32
23
24
26
16
20
8
8
5
5
5
4
1
6
16
49
Wind (km/h)
20
NW
30
WNW
40
WNW
30
WNW
30
WNW
25
WNW
25
NW
20
NW
20
WNW
20
WNW
15
W
15
W
15
W
10
W
10
SSW
10
S
20
SSW
25
SW
25
SW
25
SW
30
WSW
Wind State
cross-off
cross
cross
cross
cross
cross
cross-off
cross-off
cross
cross
cross
cross
cross
cross-on
on
on
on
on
on
on
cross-on
High Tide
5:38PM9.71m
6:08AM9.86m
6:31PM10.62m
6:56AM10.69m
7:16PM11.39m
Low Tide
11:29AM3.27m
00:06AM2.64m
12:26PM2.42m
00:54AM1.81m
1:10PM1.65m
light rain
clear
clear
clear
clear
clear
cloud
cloud
part cloud
cloud
part cloud
clear
clear
part cloud
cloud
part cloud
clear
part cloud
cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:37
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:45
7:42
7:39
 mm
5
1
1
Temp °C
15
17
17
16
15
13
14
13
14
15
15
14
14
13
13
13
16
19
18
16
17
Feels °C
11
11
9
10
9
8
8
9
9
10
11
10
11
11
11
11
13
15
13
12
13
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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 The Knap 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.


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