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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 Monday 18 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 6AM is: 0.6m 7s primary swell from a West direction and 0.1m 12s secondary swell from a West direction (forecast issued at 12:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2ft (0.6m) | 7s |
| Afternoon (18 May) | 1.5ft (0.5m) | 7s |
| Evening (18 May) | 1.5ft (0.4m) | 7s |
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 Sun night. Very mild (max 17°C on Wed afternoon, min 9°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 6 | W 7 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 14 | W 13 | W 13 | W 13 | W 13 | W 13 | |
19 | 35 | 40 | 40 | 38 | 24 | 24 | 14 | 7 | 8 | 10 | 13 | 28 | 40 | 73 | 62 | 84 | 88 | 269 | 176 | 168 | 166 | 121 | 84 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | |
High Tide | 8:28AM11.82m | 8:50PM11.95m | 9:13AM11.62m | 9:36PM11.72m | 10:00AM11.17m | |||||||||||||||||||
Low Tide | 2:14AM0.74m | 2:33PM0.75m | 2:58AM0.79m | 3:17PM0.98m | 3:43AM1.09m | 4:03PM1.43m | ||||||||||||||||||
 | |  | |  | | | | | |  | | |  | |  |  | | | |  | | |  | |
 | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:00 | — | — | — | — | — | — | — | 9:02 | — | — | — | — | — | — | — | 9:04 | — |
1 | 3 | 2 | 1 | 1 | 1 | 1 | 2 | 3 | 3 | — | — | 1 | — | — | — | 2 | 1 | — | — | — | — | — | — | |
Temp °C | 9 | 9 | 10 | 11 | 12 | 13 | 11 | 10 | 11 | 12 | 13 | 13 | 14 | 14 | 13 | 12 | 13 | 13 | 13 | 14 | 16 | 17 | 16 | 15 |
3 | 3 | 4 | 6 | 7 | 8 | 6 | 5 | 5 | 6 | 9 | 8 | 7 | 7 | 6 | 6 | 6 | 7 | 8 | 8 | 10 | 12 | 13 | 14 | |
Swell 1 Height (m) Direction Period (s) | W 11 | W 12 | W 12 | — | — | W 7 | W 7 | W 7 | W 6 | W 7 | WSW 7 | WSW 8 | — | — | — | — | — | — | — | — | — | — | W 13 | W 13 |
 kJ | 10 | 3 | 3 | — | — | 24 | 24 | 14 | 7 | 8 | 10 | 13 | — | — | — | — | — | — | — | — | — | — | 121 | 84 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 6 | W 7 | W 7 | W 7 | W 7 | — | — | S 3 | S 3 | S 3 | SSW 4 | SSW 4 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 14 | W 13 | W 13 | W 13 | — | — |
| kJ | 19 | 35 | 40 | 40 | 38 | — | — | 1 | 1 | 2 | 1 | 2 | 28 | 40 | 73 | 62 | 84 | 88 | 269 | 176 | 168 | 166 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 344 | 180 | 141 | 165 | 286 | 85 | 208 | 228 | 471 | 479 | 85 | 499 | 486 | 389 | 374 | 301 | 313 | 301 | 301 | 301 | 301 | 252 | 153 | 29 |
Best forecast wave conditions in Wales - South East | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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