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Surf Forecasts:
Cable Bay (Porth Trecastell) surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 11 am Saturday 13 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Cable Bay (Porth Trecastell) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cable Bay (Porth Trecastell) sea temperature is
11.2° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today?
The current surf forecast for Cable Bay (Porth Trecastell) at 5PM is: 3.5m 8s primary swell from a Southwest direction (forecast issued at 11:00am December 13). The wind direction is predicted to be onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 6ft (1.9m) | 6s |
| Afternoon (13 Dec) | 10ft (3.0m) | 8s |
| Evening (13 Dec) | 11ft (3.5m) | 8s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 3 AM | 6 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 257 | 643 | 1206 | 1505 | 1561 | 1676 | 1900 | 1929 | 2162 | 2055 | 2524 | 2820 | 3298 | 2842 | 1751 | 726 | 501 | 282 | 178 | 123 | 86 | 65 | 41 | 40 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | 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- off | cross- off | off | off | off | cross- off | off | cross- off | cross- off |
High Tide / height (m) | 4:20PM 3.30 | 5:13AM 3.04 | 5:21PM 3.26 | 6:03AM 3.15 | 6:15PM 3.27 | |||||||||||||||||||
Low Tide / height (m) | 10:26AM 1.30 | 11:13PM 0.99 | 11:37AM 1.29 | 12:14AM 1.00 | 12:39PM 1.18 | 1:06AM 0.95 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | 8:22 | - | - | - | - | - | - | - | 8:23 | - | - | - | - | - | - | - | 8:25 | - | - | - | - | - | - | - |
| Sunset | - | - | 3:59 | - | - | - | - | - | - | - | 3:59 | - | - | - | - | - | - | - | 4:00 | - | - | - | - | - |
 | |  |  | |  | | |  | | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | 1 | 1 | - | 2 | 1 | 1 | 1 | 3 | 6 | 6 | 8 | 9 | 8 | 3 | 1 | 1 | 2 | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 10 | 11 | 11 | 10 | 10 | 11 | 10 | 10 | 11 | 11 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 9 |
| Feels °C (?) | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | -1 | -2 | 0 | 0 | 1 | 7 | 7 | 6 | 6 | 5 | 4 | 5 | 5 | 5 | 5 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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