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The Knap Surf Forecast
/ Wales – South East (14 surf breaks) /
The Knap surfForecast / Wales – South East / UK
12 Day Weather and Surf, issued 6 pm Sunday 27 Apr 2025 BST
Best Forecast Surf Conditions for The Knap this week:
The most powerful waves expected at The Knap in the next 12 days are 0.3m 10s and forecast to arrive on Monday (Apr 28) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Sunday (May 04) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Mon 28th Apr) | 1ft (0.3m) 10s |
Table - best surf conditions forecast for The Knap over the next 12 days.
Sun 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 01 | Friday 02 | Saturday 03 | Sunday 04 | Monday 05 | Tuesday 06 | Wednesday 07 | Thursday 08 | Fri 09 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  |  | |||||||||||||||||||||||
| Wave Height (m) & direction (?) | — | |||||||||||||||||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | - | 2 | 12 | 12 | 11 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 10 | 9 | 10 | 9 | 9 | 9 | 8 | 8 | 4 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 20 | 18 | 17 | 18 | 18 | 7 | 6 | 2 | 2 | 1 | 1 | 0 | 0 | 3 | 3 | 2 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross | glass | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- on | cross- off | glass | on | glass | cross- on |
High Tide / height (m) | 7:29PM 11.93 | 7:49AM 12.26 | 8:11PM 12.27 | 8:31AM 12.34 | 8:52PM 12.28 | 9:13AM 12.06 | 9:35PM 11.94 | 9:57AM 11.46 | 10:19PM 11.32 | 10:43AM 10.62 | 11:06PM 10.50 | 11:34AM 9.68 | 12:00AM 9.63 | 12:35PM 8.81 | 1:07AM 8.89 | 1:52PM 8.23 | 2:30AM 8.51 | 3:18PM 8.16 | 3:50AM 8.63 | 4:29PM 8.52 | 4:53AM 9.05 | 5:23PM 9.06 | 5:41AM 9.54 | |||||||||||||
Low Tide / height (m) | 1:37AM 0.57 | 1:58PM 0.32 | 2:17AM 0.34 | 2:37PM 0.31 | 2:58AM 0.43 | 3:17PM 0.62 | 3:39AM 0.83 | 3:57PM 1.20 | 4:23AM 1.49 | 4:41PM 1.98 | 5:11AM 2.30 | 5:31PM 2.84 | 6:09AM 3.13 | 6:32PM 3.63 | 7:23AM 3.77 | 7:54PM 4.14 | 8:54AM 3.99 | 9:26PM 4.15 | 10:15AM 3.75 | 10:38PM 3.78 | 11:12AM 3.30 | 11:30PM 3.27 | 11:55AM 2.81 | |||||||||||||
Sun 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 01 | Friday 02 | Saturday 03 | Sunday 04 | Monday 05 | Tuesday 06 | Wednesday 07 | Thursday 08 | Fri 09 | ||||||||||||||||||||||||
| Sunrise | - | - | 5:52 | - | - | 5:50 | - | - | 5:48 | - | - | 5:46 | - | - | 5:43 | - | - | 5:41 | - | - | 5:41 | - | - | 5:39 | - | - | 5:37 | - | - | 5:35 | - | - | 5:33 | - | - | 5:31 |
| Sunset | 8:28 | - | - | 8:30 | - | - | 8:30 | - | - | 8:32 | - | - | 8:35 | - | - | 8:36 | - | - | 8:37 | - | - | 8:39 | - | - | 8:40 | - | - | 8:43 | - | - | 8:44 | - | - | 8:45 | - | - |
 |  |  | |  |  | | | | | | |  | | | | | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 14 | 12 | 15 | 17 | 15 | 17 | 19 | 17 | 17 | 20 | 18 | 19 | 20 | 16 | 15 | 18 | 17 | 15 | 17 | 14 | 14 | 16 | 10 | 13 | 15 | 10 | 14 | 17 | 15 | 16 | 16 | 15 | 16 | 17 | 16 | 17 |
| Feels °C (?) | 11 | 10 | 13 | 16 | 14 | 15 | 17 | 17 | 15 | 20 | 18 | 18 | 19 | 15 | 15 | 19 | 15 | 10 | 12 | 9 | 8 | 10 | 2 | 6 | 8 | 4 | 9 | 14 | 13 | 14 | 13 | 12 | 14 | 15 | 15 | 13 |
Short Range Forecast: Mostly dry. Very mild (max 19°C on Tue afternoon, min 11°C on Sun night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Thu afternoon. Warm (max 20°C on Wed afternoon, min 10°C on Fri night). Wind will be generally light. | Days 6-9 Weather Summary Mostly dry. Very mild (max 17°C on Sat afternoon, min 6°C on Sun night). Winds increasing (light winds from the ENE on Sat afternoon, strong winds from the NE by Sun night). | Long Range Forecast: Mostly dry. Very mild (max 18°C on Fri afternoon, min 10°C on Wed night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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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