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Cable Bay (Porth Trecastell) Surf Forecast
/ Wales – Anglesy (10 surf breaks) /
Surf Forecasts:
Cable Bay (Porth Trecastell) surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 6 am Friday 17 Apr 2026 BSTForecast 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
9.6° C
(Which is 1.1°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 12PM is: 2.0m 7s primary swell from a South-southwest direction (forecast issued at 06:00am April 17). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Apr) | 7ft (2.2m) | 7s |
| Afternoon (17 Apr) | 6.5ft (2.0m) | 7s |
| Evening (17 Apr) | 7ft (2.2m) | 7s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 17 | Saturday 18 | Sunday 19 | Mon 20 | |||||||||||||||||||||
| 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 7 | 7 | 7 | 6 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 16 | 16 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 290 | 497 | 465 | 362 | 341 | 458 | 424 | 261 | 173 | 111 | 74 | 42 | 34 | 29 | 21 | 10 | 10 | 10 | 9 | 5 | 5 | 5 | 3 | 1 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | on | on | on | on | on | cross- on | cross | cross | cross | cross | cross- off | glass | cross- off | off | cross- off | cross- off | cross- off | off | off | off |
High Tide / height (m) | 9:45AM 4.36 | 10:09PM 4.22 | 10:24AM 4.46 | 10:46PM 4.31 | 11:05AM 4.44 | 11:25PM 4.29 | ||||||||||||||||||
Low Tide / height (m) | 4:39PM -0.18 | 4:56AM -0.03 | 5:20PM -0.20 | 5:39AM -0.10 | 6:03PM -0.08 | |||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Mon 20 | |||||||||||||||||||||
| Sunrise | - | 6:15 | - | - | - | - | - | - | - | 6:13 | - | - | - | - | - | - | - | 6:11 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:20 | - | - | - | - | - | - | - | 8:22 | - | - | - | - | - | - | - | 8:23 | - | - |
 |  |  |  |  | | |  | |  | | | | | | | | | | | | | | | |
Rain (mm) | - | 1 | 1 | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 10 | 10 | 10 | 9 | 8 | 7 | 8 | 9 | 10 | 9 | 8 | 9 |
| Feels °C (?) | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 3 | 4 | 3 | 3 | 2 | 5 | 6 | 7 | 6 | 5 | 4 | 5 | 5 | 6 | 5 | 4 | 5 |
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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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