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Surf Forecasts:
Cable Bay (Porth Trecastell) surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 5 am Monday 22 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
10.6° C
(Which is slightly warmer than usual)How big are the waves at Cable Bay (Porth Trecastell) today?
The current surf forecast for Cable Bay (Porth Trecastell) at 8AM is: 0.5m 8s primary swell from a Southwest direction (forecast issued at 05:00am December 22). An open ocean swell of 0.3m 5s is not directed at the surf break, a second open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Dec) | 1.5ft (0.4m) | 8s |
| Afternoon (22 Dec) | 1.5ft (0.4m) | 8s |
| Evening (22 Dec) | 1ft (0.3m) | 7s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 22 | Tuesday 23 | Wednesday 24 | Thu 25 | |||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 9 | 9 | 9 | 8 | 8 | 8 | 4 | 7 | 8 | 3 | 4 | 5 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 45 | 32 | 25 | 15 | 14 | 14 | 10 | 10 | 8 | 4 | 4 | 3 | 2 | 2 | 2 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | glass | off | cross- off | cross- off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross- off | cross- off | off |
High Tide / height (m) | 10:27AM 3.85 | 10:46PM 3.49 | 11:01AM 3.85 | 11:20PM 3.41 | 11:35AM 3.82 | 11:57PM 3.33 | ||||||||||||||||||
Low Tide / height (m) | 5:21PM 0.45 | 5:30AM 0.60 | 6:00PM 0.50 | 6:07AM 0.68 | 6:40PM 0.57 | |||||||||||||||||||
Monday 22 | Tuesday 23 | Wednesday 24 | Thu 25 | |||||||||||||||||||||
| Sunrise | - | - | 8:30 | - | - | - | - | - | - | - | 8:30 | - | - | - | - | - | - | - | 8:30 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:01 | - | - | - | - | - | - | - | 4:01 | - | - | - | - | - | - | - | 4:02 | - | - | - |
 |  |  |  | | |  | | | | | | | |  | | | |  | | | | | | |
Rain (mm) | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 10 | 11 | 10 | 9 | 9 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 3 |
| Feels °C (?) | 5 | 6 | 7 | 7 | 11 | 8 | 7 | 5 | 5 | 5 | 2 | 1 | 0 | -1 | 0 | -2 | -1 | -1 | -2 | -2 | -2 | -2 | -2 | -3 |
- 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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