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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 pm Monday 18 May 2026 BSTForecast update in hr min s Forecast update imminent
Today's The Knap sea temperature is
12.4° C
(Which is slightly warmer than usual)How big are the waves at The Knap today?
The current surf forecast for The Knap at 2AM is: 0.3m 7s primary swell from a West direction and 0.2m 3s secondary swell from a South direction (forecast issued at 06:00pm May 18). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 1ft (0.3m) | 8s |
| Afternoon (19 May) | 1.5ft (0.4m) | 8s |
| Evening (19 May) | 2ft (0.6m) | 9s |
Table - waves today at The Knap. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 15mm), heaviest on Mon night. Very mild (max 18°C on Thu morning, min 11°C on Mon afternoon). Winds decreasing (fresh winds from the WSW on Tue afternoon, light winds from the SSE by Wed night). | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 4 AM | 7 AM | 10 AM | 1 PM | |
Swell Height Map |  |    |    |    | ||||||||||||||||||||
W 7 | W 7 | W 7 | W 7 | W 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 14 | W 13 | W 13 | W 13 | W 13 | W 13 | W 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | |
23 | 15 | 8 | 8 | 8 | 12 | 13 | 28 | 41 | 58 | 61 | 84 | 92 | 261 | 222 | 222 | 166 | 121 | 84 | 75 | 46 | 46 | 44 | 40 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-on | cross-on | on | on | 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 | on | cross-on | cross-on | on | cross-on | |
High Tide | 8:50PM11.95m | 9:13AM11.62m | 9:36PM11.72m | 10:00AM11.17m | 10:24PM11.25m | 10:51AM10.54m | ||||||||||||||||||
Low Tide | 2:33PM0.75m | 2:58AM0.79m | 3:17PM0.98m | 3:43AM1.09m | 4:03PM1.43m | 4:33AM1.59m | ||||||||||||||||||
 | |  | | | |  |  | | |  |  | | |  | |  | |  |  | | | | | |
 | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — |
 | — | 9:00 | — | — | — | — | — | — | — | 9:02 | — | — | — | — | — | — | — | 9:04 | — | — | — | — | — | 9:05 |
1 | 1 | 3 | 2 | 2 | 1 | — | 1 | 1 | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 11 | 11 | 12 | 12 | 13 | 14 | 15 | 15 | 13 | 12 | 12 | 12 | 12 | 13 | 14 | 15 | 15 | 14 | 13 | 12 | 13 | 15 | 18 |
6 | 6 | 6 | 6 | 7 | 9 | 9 | 9 | 8 | 6 | 5 | 5 | 6 | 7 | 7 | 8 | 10 | 12 | 13 | 12 | 10 | 12 | 14 | 16 | |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | W 7 | W 7 | W 7 | WSW 8 | WSW 8 | — | — | — | — | — | — | — | — | — | — | — | W 13 | W 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 |
 kJ | 23 | 15 | 8 | 8 | 8 | 12 | 13 | — | — | — | — | — | — | — | — | — | — | — | 84 | 75 | 46 | 46 | 44 | 40 |
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) | SSW 3 | SSW 3 | S 3 | S 3 | S 3 | S 3 | SSW 3 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 9 | WSW 9 | WSW 14 | W 13 | W 13 | W 13 | W 13 | — | — | — | — | — | — |
| kJ | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 28 | 41 | 58 | 61 | 84 | 92 | 261 | 222 | 222 | 166 | 121 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 85 | 210 | 228 | 479 | 480 | 477 | 499 | 486 | 309 | 374 | 374 | 389 | 403 | 301 | 301 | 463 | 201 | 153 | 29 | 85 | 39 | 33 | 33 | 33 |
Best forecast wave conditions in Wales - South East | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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