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The Knap Surf Forecast
/ Wales – South East (14 surf breaks) /
Surf Forecasts:
The Knap surfForecast / Wales – South East / UK
48hr Weather and Surf, issued 6 am Thursday 21 May 2026 BSTForecast update in hr min s Forecast update imminent
Today's The Knap sea temperature is
12.9° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at The Knap today?
The current surf forecast for The Knap at 2PM is: 0.4m 11s primary swell from a West-southwest direction (forecast issued at 06:00am May 21). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 1.5ft (0.4m) | 12s |
| Afternoon (21 May) | 1ft (0.3m) | 11s |
| Evening (21 May) | 1ft (0.3m) | 10s |
Table - waves today at The Knap. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 21°C on Fri afternoon, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | W 10 | W 10 | W 10 | |
46 | 46 | 44 | 39 | 22 | 20 | 20 | 19 | 19 | 19 | 23 | 23 | 23 | 23 | 22 | 21 | 21 | 21 | 20 | 20 | 10 | 17 | 7 | 7 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | cross-on | cross-on | cross | cross | cross-off | cross | cross-on | on | on | cross-on | glassy | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | |
High Tide | 10:51AM10.54m | 11:16PM10.62m | 11:46AM9.83m | 00:14AM9.95m | 12:49PM9.19m | |||||||||||||||||||
Low Tide | 4:33AM1.59m | 4:52PM2.04m | 5:27AM2.21m | 5:48PM2.69m | 6:29AM2.81m | 6:52PM3.26m | ||||||||||||||||||
 |  | |  | | |  | | | | | |  | |  | | | | | | | | | | |
 | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | 5:09 |
 | — | — | — | — | — | 9:05 | — | — | — | — | — | — | — | 9:07 | — | — | — | — | — | — | — | 9:07 | — | 9:09 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 12 | 13 | 16 | 17 | 18 | 17 | 15 | 14 | 13 | 14 | 17 | 20 | 21 | 19 | 18 | 15 | 15 | 14 | 16 | 18 | 19 | 19 | 18 | 18 |
10 | 12 | 15 | 17 | 16 | 14 | 13 | 13 | 12 | 13 | 16 | 18 | 21 | 19 | 19 | 14 | 15 | 13 | 15 | 17 | 16 | 16 | 16 | 18 | |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | W 10 | W 10 | W 10 |
 kJ | 46 | 46 | 44 | 39 | 22 | 20 | 20 | 19 | 19 | 19 | 23 | 23 | 23 | 23 | 22 | 21 | 21 | 21 | 20 | 20 | 10 | 17 | 7 | 7 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 85 | 85 | 39 | 14 | 33 | 39 | 14 | 14 | 14 | 14 | 25 | 32 | 61 | 61 | 28 | 28 | 40 | 28 | 53 | 61 | 53 | 53 | 53 | 22 |
Best forecast wave conditions in Wales - South East | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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