Surf Forecasts:
The Knap surf forecast from 10 Nov 2026:
- Best quality surf: No days rated 1★ or higher at The Knap in the next 16 days. The closest to surfable is Monday 16 Nov, 9PM (local time) – 4.5ft (1.3m), 14s period, W swell with cross-shore winds.
- Most powerful swell: Monday 16 Nov, 9PM (local time) - 4.5ft (1.3m), 14s period, W swell with 655 kJ wave energy.
- Next surfable swell (1★+): None forecast at The Knap before Thursday 26 Nov. Conditions stay below 1★ throughout, with swell peaking at 4.5ft (1.3m), 14s on Monday 16 Nov.
Best Forecast Surf Conditions for The Knap this week:
The most powerful waves expected at The Knap in the next 16 days are 1.3m 14s and forecast to arrive on Monday (Nov 16) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Thursday (Nov 12) at 3PM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Mon 16th Nov) | 4.5ft (1.3m) 14s |
Table - best surf conditions forecast for The Knap over the next 16 days.
Short Range ForecastModerate rain (total 15mm), heaviest on Tue afternoon. Mild temperatures (max 9°C on Tue morning, min 5°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Very mild (max 14°C on Sun afternoon, min 3°C on Fri night). Winds increasing (light winds from the E on Fri night, fresh winds from the S by Sun afternoon). | ||||||||||||||||||
Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | W 13 | W 12 | W 16 | WSW 14 | WSW 13 | WSW 13 | SW 11 | W 10 | W 10 | W 10 | — | — | — | — | W 13 | W 12 | W 11 | SSE 4 | SSW 5 |
Wave Graph  | |||||||||||||||||||
 kJ | 3 | 3 | 5 | 18 | 17 | 16 | 5 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 3 | 3 | 2 | 3 | 12 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on |
High Tide | 6:59AM11.22m | 7:15PM11.08m | 7:33AM11.17m | 7:48PM10.87m | 8:05AM10.95m | 8:22PM10.51m | 8:39AM10.58m | 8:57PM10.04m | 9:15AM10.10m | 9:34PM9.50m | 9:54AM9.55m | 10:17PM8.93m | |||||||
Low Tide | 00:44AM1.34m | 1:01PM1.38m | 1:15AM1.34m | 1:33PM1.43m | 1:47AM1.49m | 2:07PM1.65m | 2:20AM1.81m | 2:42PM2.01m | 2:56AM2.25m | 3:21PM2.49m | 3:35AM2.79m | 4:04PM3.03m | |||||||
 |  |  |  | | |  |  | | | | | | |  | | | |  | |
 | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — |
 | — | — | 4:31 | — | — | 4:30 | — | — | 4:29 | — | — | 4:27 | — | — | 4:25 | — | — | 4:23 | — |
mm | — | — | 4 | 9 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 |
Temp °C | 7 | 9 | 9 | 8 | 8 | 9 | 9 | 7 | 7 | 5 | 6 | 6 | 4 | 6 | 8 | 7 | 11 | 14 | 13 |
Feels °C | 1 | 2 | 3 | 1 | 1 | 3 | 3 | -1 | -1 | -1 | 2 | 2 | 0 | 1 | 3 | 2 | 7 | 8 | 5 |
Swell 1 Height (m) Direction Period (s) | W 13 | W 12 | W 12 | WSW 14 | WSW 13 | WSW 13 | SW 11 | W 10 | W 10 | W 10 | — | — | — | — | W 13 | W 12 | W 11 | W 11 | — |
| kJ | 3 | 3 | 3 | 18 | 17 | 16 | 5 | 2 | 2 | 2 | — | — | — | — | 3 | 3 | 2 | 2 | — |
Swell 2 Height (m) Direction Period (s) | — | — | W 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 3 | E 3 | ENE 3 | ENE 3 | ENE 3 | E 3 | — | — | NE 3 | NNE 3 | — | — | — | — | — | — | — | SSE 4 | SSW 5 |
| kJ | 1 | 1 | 1 | 1 | 1 | 1 | — | — | 2 | 1 | — | — | — | — | — | — | — | 3 | 12 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 214 | 144 | 133 | 78 | 131 | 73 | 22 | 35 | 35 | 65 | 72 | 65 | 72 | 68 | 320 | 474 | 449 | 480 | 451 |
Best forecast wave conditions in Wales - South East | |||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 16 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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