Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
The Knap surfForecast / Wales – South East / UK
48hr Weather and Surf, issued 11 pm Friday 19 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Today's The Knap sea temperature is
9.5° C
(Which is 1.6°C colder than average for this time of year)How big are the waves at The Knap today?
The current surf forecast for The Knap at 3AM is: 0.5m 14s primary swell from a West direction (forecast issued at 11:00pm December 19). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Dec) | 1.5ft (0.4m) | 13s |
| Afternoon (20 Dec) | 1.5ft (0.4m) | 13s |
| Evening (20 Dec) | 1.5ft (0.4m) | 12s |
Table - waves today at The Knap. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||||||||||
| 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 15 | 14 | 14 | 13 | 10 | 13 | 12 | 12 | 12 | 12 | 12 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 161 | 155 | 106 | 98 | 59 | 18 | 55 | 48 | 49 | 47 | 47 | 51 | 168 | 161 | 157 | 109 | 109 | 70 | 67 | 36 | 35 | 34 | 29 | 26 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 6:29PM 10.05 | 6:48AM 10.41 | 7:06PM 10.25 | 7:23AM 10.62 | 7:42PM 10.36 | 7:59AM 10.72 | ||||||||||||||||||
Low Tide / height (m) | 12:33AM 2.18 | 12:55PM 2.09 | 1:10AM 1.99 | 1:33PM 1.92 | 1:46AM 1.90 | 2:09PM 1.86 | ||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:14 | - | - | - | - | - | - | - | 8:15 | - | - | - | - | - | - | - | 8:15 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:06 | - | - | - | - | - | - | - | 4:06 | - | - | - | - | - | - | - | 4:06 | - |
 | | |  |  | | |  |  | | | |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 2 | - | - | - | - | 2 | - | - | - | 4 | 2 | - | - | - | - | - |
| Temp. °C | 8 | 8 | 7 | 7 | 7 | 9 | 8 | 8 | 9 | 9 | 8 | 7 | 7 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 8 |
| Feels °C (?) | 4 | 5 | 3 | 3 | 2 | 2 | 1 | 1 | 2 | 6 | 5 | 4 | 4 | 4 | 3 | 5 | 4 | 4 | 7 | 7 | 6 | 5 | 6 | 5 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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