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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 Sunday 25 Jan 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Today's The Knap sea temperature is
6.7° C
 (Which is 2.9°C colder than average for this time of year)

Best Forecast Surf Conditions for The Knap this week:

The surf forecast for The Knap over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jan 25) at 6PM. The primary swell is predicted to be 0.6m and 17s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at The Knap in the next 12 days are 0.9m 16s and forecast to arrive on Saturday (Jan 31) at 6AM. 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+) 6PM (Sun 25th Jan)2ft (0.6m) 17s
Best Surf 6PM (Sun 25th Jan)2ft (0.6m) 17s
Most Powerful 6AM (Sat 31st Jan)3ft (0.9m) 16s

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 Heavy rain (total 26mm), heaviest during Mon night. Very mild (max 10°C on Tue morning, min 5°C on Mon morning). Winds increasing (light winds from the ESE on Sun afternoon, gales from the WSW by Tue afternoon).

Days 3-6 Weather Summary Heavy rain (total 33mm), heaviest during Wed afternoon. Mild temperatures (max 9°C on Wed morning, min 7°C on Wed afternoon). Winds decreasing (strong winds from the SSE on Wed afternoon, moderate winds from the SE by Fri night).

Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Saturday
31
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 (?)
0.6
W
0.4
WSW
0.6
W
0.5
W
0.4
WSW
0.4
WSW
0.4
WSW
0.7
WSW
0.5
W
0.5
W
0.6
WSW
0.6
WSW
0.6
WSW
0.5
W
0.5
W
0.6
WSW
0.7
WSW
0.6
WSW
0.8
WSW
0.7
WSW
0.7
WSW
Period(s) (?)141415131212121515161716151413161817161515
Wave
Graph
(?)Metric surfscale
Energy kJ (?)148621708950444722511012722720117210387196352216337240237
Wind
(km/h)
25
ESE
10
ESE
20
ENE
20
ESE
25
SE
20
SE
35
SE
45
SSW
45
SW
35
S
50
SSE
30
SSE
40
SE
35
SSW
40
SSW
30
SW
25
S
30
SE
20
SSE
30
WSW
15
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		crosscross-
off		crosscross-
on		cross-
on		cross-
on		oncross-
on		oncross-
on		cross-
on		crossonononcross-
on		crosscross-
on		cross-
on		on
High Tide
/ height (m)
10:56AM
10.51
11:21PM
9.93
11:46AM
9.89
12:17AM
9.36
12:48PM
9.25
1:28AM
8.92
2:07PM
8.84
2:53AM
8.86
3:33PM
8.91
4:12AM
9.30
4:47PM
9.42
5:17AM
10.03
5:45PM
10.11
Low Tide
/ height (m)
5:02PM
2.15
5:21AM
2.51
5:52PM
2.71
6:17AM
3.09
6:54PM
3.26
7:32AM
3.56
8:16PM
3.58
9:05AM
3.63
9:48PM
3.44
10:34AM
3.18
11:04PM
2.90
11:40AM
2.46
12:02AM
2.21
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Saturday
31
Sunrise8:00--8:00--7:58--7:56--7:56--7:54--7:52--
Sunset-4:49--4:51--4:52--4:54--4:55--4:58--5:00-
light rain
cloud
part cloud
cloud
light rain
heavy rain
rain showers
light rain
part cloud
light rain
mod rain
mod rain
rain showers
part cloud
light rain
rain showers
light rain
mod rain
light rain
part cloud
clear
Rain (mm)
1---41155-4665-21182--
Temp. °C7867891087988998998888
Feels °C (?)2511343-2-51-3111-1332012
  • Map Icons:
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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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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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