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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 12 pm Thursday 03 Jul 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 0.5m 9s and forecast to arrive on Monday (Jul 07) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Monday (Jul 07) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Mon 7th Jul) | 1.5ft (0.5m) 9s |
Table - best surf conditions forecast for The Knap over the next 12 days.
Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||||||||||||
| 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 | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 5 | 6 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 8 | 8 | 8 | 7 | 7 | 4 | 7 | 7 | 5 | 6 | 6 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 4 | 4 | 3 | 3 | 6 | 12 | 25 | 25 | 25 | 24 | 34 | 21 | 0 | 0 | 8 | 1 | 10 | 3 | 1 | 1 | 2 | 1 | 1 | 4 | 5 | 5 | 7 | 9 | 10 | 6 | 7 | 7 | 3 | 4 | 4 | 3 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- off | cross | cross | cross | glass | cross | cross | cross | cross | cross | cross- on | cross | on | cross- on | cross- on | on | cross- on | cross | cross- on |
High Tide / height (m) | 1:26PM 8.79 | 1:51AM 8.89 | 2:25PM 8.49 | 2:52AM 8.59 | 3:29PM 8.40 | 3:57AM 8.50 | 4:32PM 8.54 | 4:58AM 8.64 | 5:29PM 8.87 | 5:52AM 8.95 | 6:18PM 9.31 | 6:39AM 9.35 | 7:01PM 9.79 | 7:22AM 9.78 | 7:42PM 10.26 | 8:02AM 10.18 | 8:21PM 10.67 | 8:40AM 10.50 | 8:59PM 10.98 | 9:19AM 10.72 | 9:38PM 11.16 | 9:58AM 10.80 | 10:18PM 11.18 | |||||||||||||
Low Tide / height (m) | 7:25PM 3.47 | 7:59AM 3.50 | 8:23PM 3.77 | 8:59AM 3.70 | 9:28PM 3.89 | 10:02AM 3.71 | 10:33PM 3.78 | 11:03AM 3.53 | 11:34PM 3.49 | 11:58AM 3.21 | 12:26AM 3.07 | 12:46PM 2.81 | 1:12AM 2.62 | 1:29PM 2.41 | 1:55AM 2.20 | 2:09PM 2.06 | 2:34AM 1.85 | 2:48PM 1.78 | 3:12AM 1.60 | 3:26PM 1.61 | 3:50AM 1.49 | 4:04PM 1.58 | ||||||||||||||
Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||||||||||||
| Sunrise | 5:01 | - | - | 5:01 | - | - | 5:03 | - | - | 5:03 | - | - | 5:05 | - | - | 5:05 | - | - | 5:07 | - | - | 5:07 | - | - | 5:09 | - | - | 5:09 | - | - | 5:11 | - | - | 5:11 | - | - |
| Sunset | - | 9:31 | - | - | 9:30 | - | - | 9:30 | - | - | 9:30 | - | - | 9:30 | - | - | 9:29 | - | - | 9:29 | - | - | 9:28 | - | - | 9:27 | - | - | 9:25 | - | - | 9:24 | - | - | 9:23 | - |
 |  |  | |  |  |  | |  | | |  | | | | | | | | | | | | | | | | | |  |  | | | | | | |
Rain (mm) | - | - | - | - | - | 2 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 1 | 1 | - | 2 | - | - | - |
| Temp. °C | 17 | 16 | 15 | 17 | 17 | 16 | 17 | 17 | 16 | 16 | 17 | 15 | 17 | 18 | 15 | 18 | 20 | 16 | 19 | 20 | 18 | 21 | 22 | 19 | 20 | 20 | 17 | 19 | 19 | 17 | 20 | 21 | 19 | 18 | 18 | 16 |
| Feels °C (?) | 13 | 11 | 12 | 13 | 12 | 12 | 14 | 13 | 12 | 11 | 12 | 12 | 11 | 13 | 12 | 15 | 16 | 12 | 16 | 17 | 16 | 20 | 20 | 18 | 17 | 16 | 15 | 19 | 18 | 17 | 19 | 19 | 17 | 14 | 13 | 13 |
Short Range Forecast: Light rain (total 4mm), mostly falling on Fri night. Very mild (max 17°C on Thu morning, min 14°C on Thu night). Mainly fresh winds. | Days 3-6 Weather Summary Mostly dry. Warm (max 20°C on Tue afternoon, min 12°C on Sun night). Winds decreasing (fresh winds from the WNW on Sun night, light winds from the WNW by Tue night). | Days 6-9 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 16°C on Wed morning). Wind will be generally light. | Long Range Forecast: Light rain (total 6mm), mostly falling on Sat afternoon. Warm (max 21°C on Sun afternoon, min 15°C on Mon night). Winds increasing (light winds from the SSW on Sat night, fresh winds from the W by Mon afternoon). | |||||||||||||||||||||||||||||||||
- 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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