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Surf Forecasts:

The Knap surf break

The Knap surfForecast / Wales – South East / UK

information circle12 Day Weather and Surf, issued 11 am Saturday 24 Jan 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Today's The Knap sea temperature is
6.6° C
 (Which is 3.0°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 0.8m 17s and forecast to arrive on Saturday (Jan 31) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Sunday (Jan 25) at 3PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 6PM (Sat 31st Jan)2.5ft (0.8m) 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 Heavy rain (total 32mm), heaviest during Mon night. Mild temperatures (max 8°C on Sat morning, min 5°C on Sun night). Winds decreasing (strong winds from the SE on Sat morning, light winds from the ESE by Sun night).

Days 3-6 Weather Summary Heavy rain (total 32mm), heaviest during Thu night. Mild temperatures (max 9°C on Wed morning, min 6°C on Tue night). Winds increasing (moderate winds from the ENE on Tue morning, strong winds from the SW by Thu afternoon).

Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
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 (?)
0.5
W
0.5
W
0.8
WSW
0.6
W
0.4
WSW
0.6
W
0.5
W
0.4
WSW
0.4
WSW
0.5
W
0.5
W
0.8
WSW
0.6
W
0.5
W
0.6
WSW
0.5
W
0.5
W
0.8
W
0.5
W
0.6
W
0.7
WSW
Period(s) (?)151515141415131212161616171716151413121414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1151103161466117087504412212233721515120612110421276142215
Wind
(km/h)
45
SE
45
SSE
20
SSW
25
ESE
15
ESE
5
ESE
15
ESE
30
SE
25
ENE
25
ENE
40
E
35
SE
35
SW
25
S
30
SE
45
SSE
50
SW
50
WSW
30
S
15
S
15
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on		oncrosscrosscrosscrosscross-
on		cross-
off		cross-
off		cross-
off		cross-
on		oncross-
on		cross-
on		cross-
on		oncross-
on		cross-
on		cross-
on		on
High Tide
/ height (m)
10:12AM
11.00
10:34PM
10.44
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
Low Tide
/ height (m)
4:20PM
1.70
4:35AM
1.99
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
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Sunrise8:02--8:00--8:00--7:58--7:56--7:56--7:54--
Sunset-4:47--4:49--4:51--4:52--4:54--4:55--4:58-
light rain
light rain
rain showers
mod rain
rain showers
part cloud
part cloud
mod rain
heavy rain
light rain
mod rain
rain showers
rain showers
rain showers
light rain
rain showers
light rain
rain showers
light rain
light rain
rain showers
Rain (mm)
22271--711485111345346
Temp. °C88877668788899887811108
Feels °C (?)-2-1213302111-2331-1-4-3473
  • 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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