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:
Llandanwg surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 5 am Thursday 18 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Llandanwg surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llandanwg sea temperature is
9.0° C
(Which is 1.2°C colder than average for this time of year)How big are the waves at Llandanwg today?
The current surf forecast for Llandanwg at 1PM is: 0.5m 20s primary swell from a West-southwest direction and 0.6m 5s secondary swell from a Southwest direction, 0.6m 9s secondary swell from a West-southwest direction, 0.4m 3s secondary swell from a Southeast direction (forecast issued at 05:00am December 18). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 3.5ft (1.1m) | 10s |
| Afternoon (18 Dec) | 1.5ft (0.5m) | 19s |
| Evening (18 Dec) | 4.5ft (1.4m) | 7s |
Table - waves today at Llandanwg. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| 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 | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 20 | 19 | 19 | 7 | 6 | 7 | 8 | 8 | 8 | 9 | 6 | 6 | 7 | 7 | 8 | 9 | 10 | 10 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 501 | 314 | 223 | 216 | 210 | 201 | 214 | 223 | 395 | 521 | 524 | 516 | 396 | 149 | 172 | 179 | 255 | 288 | 357 | 753 | 783 | 375 | 297 | 169 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | cross- on | cross | cross- on | cross- on | cross- on | on | on | on | on | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross |
High Tide / height (m) | 6:50AM 3.71 | 7:08PM 3.69 | 7:26AM 3.87 | 7:44PM 3.78 | 8:01AM 3.99 | 8:19PM 3.83 | ||||||||||||||||||
Low Tide / height (m) | 1:51PM 0.91 | 2:04AM 0.89 | 2:29PM 0.80 | 2:41AM 0.82 | 3:07PM 0.72 | |||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| Sunrise | - | - | 8:23 | - | - | - | - | - | - | - | 8:25 | - | - | - | - | - | - | - | 8:25 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:00 | - | - | - | - | - | - | - | 4:00 | - | - | - | - | - | - | - | 4:00 | - | - | - |
 |  |  |  | | |  |  | | |  | | | | |  | | | | | | | | | |
Rain (mm) | 1 | - | - | 1 | 3 | 1 | 2 | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | 1 | 2 | 3 |
| Temp. °C | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 9 | 8 | 9 | 9 | 9 | 8 | 8 | 7 |
| Feels °C (?) | 4 | 6 | 6 | 6 | 6 | 3 | 2 | 2 | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 0 | 1 | 1 | 2 | 4 |
- 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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