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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 Tuesday 25 Nov 2025 GMT
Forecast update in hr  min  s Forecast update imminent
Today's The Knap sea temperature is
10.7° C
 (Which is 1.6°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 0.7m 13s and forecast to arrive on Tuesday (Dec 02) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 3PM (Tue 2nd Dec)2.5ft (0.7m) 13s

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 Light rain (total 3mm), mostly falling on Wed afternoon. Very mild (max 13°C on Thu morning, min 5°C on Tue night). Winds increasing (calm on Tue night, fresh winds from the WSW by Thu afternoon).

Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Fri night. Very mild (max 11°C on Fri morning, min 5°C on Sun night). Winds decreasing (near gales from the W on Fri night, light winds from the S by Sun night).

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
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 (?)
0.2
W
0.2
W
0.2
W
0.2
W
0.2
W
0.4
WSW
0.4
W
0.4
W
0.5
W
0.4
WSW
0.6
WSW
0.6
W
0.5
W
0.5
W
0.4
W
0.3
W
0.3
W
0.3
W
0.4
W
0.5
W
0.6
W
Period(s) (?)9101111107979101381211111111117910
Wave
Graph
(?)Metric surfscale
Energy kJ (?)77998172415383412945706441212120154068
Wind
(km/h)
15
NNW
10
NNW
5
N
10
S
20
S
15
WSW
25
SW
30
SW
25
W
30
SW
35
W
25
S
40
W
35
WNW
25
NW
25
NW
20
WNW
5
S
30
SSE
20
SSW
45
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		glasscross-
on		oncross-
on		oncross-
on		cross-
on		oncross-
on		cross-
on		cross-
on		crosscross-
off		cross-
off		crossoncross-
on		onon
High Tide
/ height (m)
9:23AM
10.04
9:45PM
9.48
10:06AM
9.61
10:32PM
9.04
10:57AM
9.20
11:29PM
8.67
11:59AM
8.91
12:38AM
8.51
1:11PM
8.88
1:53AM
8.69
2:24PM
9.18
3:02AM
9.19
3:28PM
9.74
Low Tide
/ height (m)
3:32PM
2.60
3:47AM
2.87
4:17PM
3.02
4:35AM
3.31
5:13PM
3.38
5:36AM
3.65
6:21PM
3.58
6:48AM
3.77
7:35PM
3.49
8:04AM
3.56
8:45PM
3.11
9:11AM
3.07
9:45PM
2.54
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Sunrise7:46--7:47--7:48--7:50--7:52--7:52--7:54--
Sunset-4:13--4:12--4:10--4:09--4:08--4:08--4:07-
clear
clear
clear
cloud
light rain
light rain
cloud
light rain
part cloud
rain showers
rain showers
light rain
part cloud
light rain
clear
clear
clear
part cloud
mod rain
light rain
rain showers
Rain (mm)
----11-1-114-1----928
Temp. °C8877912131312111011998776111313
Feels °C (?)444238887422011013498
  • 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

Latest Updates

Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Ben Mondy

Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

Feel that? If you are in the northern hemisphere, you will have had that first bite of winter. The lick of a frost, the chill of a cold offshore breeze and the sound of winter swells pounding the shores. If you are near the mountains, your favourite jackets, gloves, and footwear might get dusted off and prepped for battle. And in that beautiful Venn diagram, you will find PrimaLoft. They have spent over 40 years developing innovative insulations that have powered your warmest winter gear. In t

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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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