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:
Llangrannog surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 5 am Thursday 18 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Llangrannog surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llangrannog sea temperature is
10.9° C
(Which is normal for this time of year)How big are the waves at Llangrannog today?
The current surf forecast for Llangrannog at 11AM is: 1.4m 19s primary swell from a West-southwest direction and 1.0m 20s secondary swell from a West direction (forecast issued at 05:00am December 18). The wind direction is predicted to be offshore and the swell rating is 4.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 3.5ft (1.0m) | 20s |
| Afternoon (18 Dec) | 4.5ft (1.3m) | 19s |
| Evening (18 Dec) | 6ft (1.8m) | 18s |
Table - waves today at Llangrannog. (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) (?) | 21 | 20 | 20 | 19 | 19 | 18 | 18 | 18 | 7 | 8 | 8 | 9 | 8 | 6 | 8 | 8 | 8 | 9 | 10 | 11 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 320 | 660 | 775 | 1497 | 1209 | 2111 | 2069 | 2411 | 520 | 763 | 885 | 790 | 445 | 237 | 327 | 329 | 352 | 381 | 394 | 638 | 560 | 443 | 359 | 296 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross | cross | cross | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | cross- off | cross- off |
High Tide / height (m) | 6:41AM 3.45 | 6:59PM 3.42 | 7:17AM 3.60 | 7:35PM 3.51 | 7:52AM 3.72 | 8:09PM 3.55 | ||||||||||||||||||
Low Tide / height (m) | 1:32PM 0.86 | 1:45AM 0.84 | 2:11PM 0.75 | 2:21AM 0.77 | 2:49PM 0.68 | |||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| Sunrise | - | - | 8:22 | - | - | - | - | - | - | - | 8:22 | - | - | - | - | - | - | - | 8:22 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:06 | - | - | - | - | - | - | - | 4:06 | - | - | - | - | - | - | - | 4:06 | - | - | - |
 | |  |  | |  |  |  | | |  | |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | 2 | 2 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 3 | 4 | 1 |
| Temp. °C | 10 | 10 | 10 | 9 | 9 | 11 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 7 | 7 |
| Feels °C (?) | 6 | 8 | 6 | 6 | 3 | 3 | 1 | 1 | -1 | 0 | 2 | 3 | 4 | 2 | 1 | 2 | 1 | 0 | -1 | -1 | 0 | 2 | 4 | 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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