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Surf Forecasts:

The Knap surf break

The Knap surfForecast / Wales – South East / UK

information circle16 Day Weather and Surf, issued 5 pm Friday 13 Mar 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Today's The Knap sea temperature is
8.8° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for The Knap this week:

The most powerful waves expected at The Knap in the next 16 days are 1.0m 8s and forecast to arrive on Monday (Mar 16) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12AM (Mon 16th Mar)3.5ft (1.0m) 8s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast Light rain (total 6mm), mostly falling on Fri afternoon. Mild temperatures (max 9°C on Sun morning, min 5°C on Fri night). Winds increasing (light winds from the SW on Sat night, strong winds from the W by Sun night).

Days 3-6 Weather Summary Mostly dry. Very mild (max 15°C on Wed afternoon, min 6°C on Wed night). Mainly fresh winds.

Fri
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
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
See all maps
Wave Height (m) & direction (?)
1
W
0.6
W
0.4
W
0.4
W
0.3
W
0.3
W
0.7
W
1
W
0.8
W
0.7
W
0.6
W
0.5
W
0.5
W
0.5
W
0.4
WSW
0.4
WSW
0.4
WSW
0.3
WSW
0.2
W
0.2
W
0.1
W
Period(s) (?)111010139958988891212161513131212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)24476345014132513510269483742804990713413123
Wind
(km/h)
35
W
15
WNW
15
NW
15
W
10
SW
25
SSW
40
W
35
WNW
25
WSW
30
WSW
20
SSW
25
S
25
S
5
ESE
15
ENE
25
E
20
ENE
25
ENE
20
E
15
ENE
20
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscross-
off		crosscross-
on		oncross-
on		crosscross-
on		cross-
on		oncross-
on		cross-
on		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
2:57AM
7.69
3:47PM
7.76
4:18AM
8.35
4:49PM
8.57
5:09AM
9.25
5:31PM
9.48
5:48AM
10.18
6:08PM
10.37
6:24AM
11.04
6:43PM
11.15
6:59AM
11.75
7:18PM
11.75
7:34AM
12.21
Low Tide
/ height (m)
8:14PM
4.75
9:21AM
4.53
9:58PM
4.32
10:39AM
3.81
11:00PM
3.51
11:27AM
2.93
11:42PM
2.63
12:05PM
2.06
12:19AM
1.80
12:39PM
1.31
12:52AM
1.10
1:12PM
0.73
1:25AM
0.60
Fri
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Sunrise--6:30--6:28--6:26--6:24--6:20--6:18--6:16
Sunset6:13--6:15--6:15--6:17--6:20--6:21--6:22--
rain showers
rain showers
clear
clear
part cloud
light rain
clear
rain showers
rain showers
cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
clear
Rain (mm)
21---1-11------------
Temp. °C75887997999111191215111013109
Feels °C (?)-1043210-322345781074863
  • 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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Quick surf report for The Knap:

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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.

View detailed surf forecast for The Knap at:
surf-forecast.com

Information about the The Knap Surf forecast

The above surf forecast table for The Knap provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Knap can be found by selecting the local surf guide option on the grey menu. Our The Knap 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 (The Knap) 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 The Knap 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.

The Knap is 2 km (1 miles) from Barry. If you plan a holiday in Wales - South East, look for hotels and other accommodation in Barry. Barry has rooms for a wide range of budgets as well as car hire and transport links.

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