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Surf Forecasts:

The Knap surf break

The Knap surfForecast / Wales – South East / UK

information circle12 Day Weather and Surf, issued 5 am Thursday 12 Feb 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Today's The Knap sea temperature is
6.9° C
 (Which is 2.3°C colder than average 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 12 days are 1.0m 17s and forecast to arrive on Thursday (Feb 12) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Friday (Feb 13) at 9PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful12PM (Thu 12th Feb)3.5ft (1.0m) 17s

Table - best surf conditions forecast for The Knap over the next 12 days.

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

Short Range Forecast A dusting of snow turning to light rain (total 8mm) on Sat night. Mild temperatures (max 9°C on Thu morning, min 2°C on Fri night). Winds decreasing (strong winds from the NE on Fri afternoon, calm by Sat morning).

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Tue afternoon. Mild temperatures (max 9°C on Sun morning, min 3°C on Tue night). Winds increasing (light winds from the WSW on Sun morning, strong winds from the NE by Tue night).

Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
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 (?)
0.8
W
0.9
W
0.8
WSW
0.7
W
0.5
W
0.3
WSW
0.2
WSW
0.2
WSW
0.3
WSW
0.4
WSW
0.7
W
0.6
W
0.9
W
1.2
W
0.9
W
0.6
W
0.5
W
0.3
W
0.3
WSW
0.2
WSW
0.6
SSE
Period(s) (?)1716141312131313121211128101310131211114
Wave
Graph
(?)Metric surfscale
Energy kJ (?)3814272731667733171630451279699277280678425251212
Wind
(km/h)
35
W
30
W
25
WSW
5
SSE
35
NNE
30
NNE
15
NNW
10
WSW
30
SSE
10
WSW
30
W
30
W
45
W
45
WNW
30
W
15
S
20
ESE
25
NE
50
NE
20
NE
20
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
on		cross-
on		offoffcross-
off		cross-
on		cross-
on		cross-
on		cross-
on		crosscrosscrosscrossoncrossoffoffcross-
off		cross-
on
High Tide
/ height (m)
2:53PM
7.63
3:41AM
7.93
4:19PM
8.01
4:49AM
8.54
5:16PM
8.69
5:38AM
9.32
5:59PM
9.46
6:17AM
10.12
6:36PM
10.21
6:52AM
10.87
7:10PM
10.87
7:26AM
11.47
7:44PM
11.38
Low Tide
/ height (m)
8:58PM
4.50
9:54AM
4.36
10:27PM
4.10
11:06AM
3.72
11:26PM
3.40
11:54AM
2.94
12:09AM
2.65
12:33PM
2.19
12:46AM
1.93
1:07PM
1.53
1:19AM
1.34
1:39PM
1.02
1:52AM
0.91
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Sunrise7:33--7:31--7:28--7:26--7:24--7:22--7:20--
Sunset-5:22--5:22--5:24--5:27--5:29--5:30--5:32-
rain showers
part cloud
rain showers
rain showers
cloud
clear
part cloud
cloud
light snow
light rain
part cloud
rain showers
rain showers
clear
cloud
light rain
mod rain
mod rain
rain showers
part cloud
light rain
Rain (mm)
1-11----51-22--3861-1
Temp. °C998853555999787666456
Feels °C (?)2234-3-721-4433-3-2-2212-5-1-1
  • 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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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 12 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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