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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 12 am Sunday 17 May 2026 BSTForecast update in hr min s Forecast update imminent
Today's The Knap sea temperature is
12.6° C
(Which is 1.2°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 9AM is: 0.4m 7s primary swell from a West direction and 0.1m 14s secondary swell from a West direction (forecast issued at 12:00am May 17). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 1.5ft (0.4m) | 7s |
| Afternoon (17 May) | 1.5ft (0.4m) | 6s |
| Evening (17 May) | 0.5ft (0.2m) | 12s |
Table - waves today at The Knap. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 22mm), heaviest during Mon night. Very mild (max 14°C on Tue morning, min 8°C on Sat night). Winds increasing (light winds from the SW on Mon afternoon, strong winds from the WSW by Tue morning). | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | ||||||||||||||||||||||
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 | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
W 5 | W 6 | W 7 | W 7 | W 7 | W 6 | W 12 | W 6 | W 6 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 6 | W 6 | W 6 | WSW 6 | WSW 7 | W 5 | W 6 | W 7 | W 8 | |
5 | 6 | 14 | 14 | 14 | 20 | 11 | 11 | 11 | 13 | 14 | 23 | 16 | 15 | 8 | 7 | 3 | 3 | 4 | 9 | 11 | 35 | 39 | 45 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 7:44AM11.73m | 8:06PM11.90m | 8:28AM11.82m | 8:50PM11.95m | 9:13AM11.62m | 9:36PM11.72m | ||||||||||||||||||
Low Tide | 1:30AM0.96m | 1:51PM0.78m | 2:14AM0.74m | 2:33PM0.75m | 2:58AM0.79m | 3:17PM0.98m | ||||||||||||||||||
 | |  | | | |  |  |  | | |  | | | | | | | | | |  |  | | |
 | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:00 | — | — | — | — | — | — | — | 9:00 | — | — | — | — | — | — | — | 9:02 | — |
— | — | — | — | — | — | 1 | — | 1 | 3 | 1 | 1 | 1 | — | 1 | 1 | 3 | 5 | 1 | 1 | 1 | — | — | — | |
Temp °C | 10 | 9 | 8 | 11 | 12 | 12 | 10 | 10 | 9 | 9 | 9 | 11 | 12 | 13 | 12 | 11 | 11 | 12 | 13 | 13 | 14 | 14 | 14 | 14 |
6 | 5 | 4 | 6 | 6 | 6 | 5 | 5 | 4 | 5 | 5 | 7 | 7 | 9 | 9 | 7 | 7 | 7 | 8 | 8 | 7 | 7 | 9 | 9 | |
Swell 1 Height (m) Direction Period (s) | — | W 6 | W 7 | W 7 | W 12 | — | W 12 | W 6 | W 6 | W 6 | W 7 | W 11 | W 7 | W 7 | W 7 | W 6 | W 6 | W 6 | — | — | — | — | — | — |
 kJ | — | 6 | 14 | 14 | 3 | — | 11 | 10 | 11 | 13 | 14 | 2 | 16 | 15 | 8 | 7 | 3 | 3 | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | W 13 | W 13 | W 14 | — | — | — | W 12 | W 11 | W 11 | W 11 | — | W 11 | — | W 10 | W 10 | W 10 | W 10 | — | — | — | — | — | — |
| kJ | — | 3 | 3 | 4 | — | — | — | 11 | 10 | 10 | 2 | — | 2 | — | 2 | 2 | 2 | 2 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | — | — | — | W 7 | W 6 | W 6 | — | — | — | — | W 7 | — | — | — | — | — | SSE 2 | WSW 6 | WSW 7 | W 5 | W 6 | W 7 | W 8 |
| kJ | 5 | — | — | — | 14 | 20 | 10 | — | — | — | — | 23 | — | — | — | — | — | 1 | 4 | 9 | 11 | 35 | 39 | 45 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 344 | 102 | 28 | 325 | 325 | 344 | 344 | 149 | 180 | 177 | 53 | 115 | 153 | 153 | 128 | 128 | 139 | 480 | 486 | 477 | 504 | 325 | 344 | 301 |
Best forecast wave conditions in Wales - South East | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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