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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 Saturday 05 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 0.4m 5s period and expected on Monday (Jul 07) at 7AM.
| 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.
Sat 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thu 17 | ||||||||||||||||||||||||
| 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) (?) | 8 | 7 | 7 | 7 | 9 | 6 | 6 | 8 | 5 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 10 | 9 | 9 | 8 | 8 | 8 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 11 | 11 | 10 | 10 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 42 | 24 | 32 | 35 | 25 | 18 | 14 | 6 | 5 | 11 | 4 | 1 | 1 | 1 | 1 | 1 | 3 | 2 | 2 | 1 | 1 | 1 | 2 | 5 | 5 | 5 | 5 | 1 | 10 | 43 | 43 | 34 | 17 | 16 | 14 | 14 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross | cross- off | cross | cross | cross | cross | glass | cross- off | glass | glass | cross- off | glass | cross | cross- off | on | glass | glass | glass | cross- off | cross- off | cross- off | cross | cross | cross | cross- off | glass | cross | cross- off | glass |
High Tide / height (m) | 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 | 10:39AM 10.72 | 10:59PM 11.03 | 11:22AM 10.49 | 11:44PM 10.71 | 12:10PM 10.13 | |||||||||||||
Low Tide / height (m) | 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 | 4:29AM 1.51 | 4:43PM 1.68 | 5:10AM 1.68 | 5:25PM 1.93 | 5:54AM 1.99 | |||||||||||||
Sat 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thu 17 | ||||||||||||||||||||||||
| Sunrise | - | - | 5:03 | - | - | 5:05 | - | - | 5:05 | - | - | 5:07 | - | - | 5:07 | - | - | 5:09 | - | - | 5:09 | - | - | 5:11 | - | - | 5:11 | - | - | 5:13 | - | - | 5:13 | - | - | 5:15 |
| Sunset | 9:30 | - | - | 9:30 | - | - | 9:30 | - | - | 9:29 | - | - | 9:29 | - | - | 9:28 | - | - | 9:27 | - | - | 9:25 | - | - | 9:24 | - | - | 9:23 | - | - | 9:23 | - | - | 9:22 | - | - |
 |  |  | | | |  |  | | | | | | | | |  | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 16 | 17 | 18 | 15 | 18 | 18 | 15 | 18 | 19 | 16 | 21 | 21 | 20 | 23 | 26 | 23 | 25 | 28 | 24 | 27 | 29 | 21 | 25 | 28 | 25 | 23 | 22 | 18 | 21 | 21 | 18 | 21 | 21 | 19 | 23 |
| Feels °C (?) | 14 | 13 | 12 | 12 | 11 | 15 | 12 | 11 | 15 | 14 | 12 | 20 | 19 | 19 | 23 | 26 | 22 | 24 | 27 | 24 | 25 | 26 | 20 | 25 | 27 | 25 | 22 | 22 | 16 | 17 | 16 | 15 | 19 | 18 | 17 | 22 |
Short Range Forecast: Mostly dry. Very mild (max 18°C on Sat afternoon, min 13°C on Mon night). Winds decreasing (fresh winds from the NW on Sun night, light winds from the NW by Tue morning). | Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Thu afternoon, min 15°C on Tue night). Wind will be generally light. | Days 6-9 Weather Summary Mostly dry. Warm (max 29°C on Sat afternoon, min 17°C on Fri night). Wind will be generally light. | Long Range Forecast: Mostly dry. Warm (max 23°C on Thu morning, min 16°C on Mon 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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