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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 12 am Wednesday 13 May 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
11.3° 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 4AM is: 2.1m 6s primary swell from a West-northwest direction and 0.2m 8s secondary swell from a South-southwest direction, 0.1m 18s secondary swell from a Southwest direction (forecast issued at 12:00am May 13). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 7.5ft (2.3m) | 6s |
| Afternoon (13 May) | 1.5ft (0.4m) | 7s |
| Evening (13 May) | 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
Short Range ForecastLight rain (total 9mm), mostly falling on Tue night. Very mild (max 11°C on Tue night, min 8°C on Tue night). Winds decreasing (strong winds from the WNW on Tue night, light winds from the N by Thu night). | ||||||||||||||||||||||||
Wednesday 13 | Thursday 14 | Friday 15 | ||||||||||||||||||||||
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 | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
WNW 5 | WNW 6 | NW 6 | NW 7 | NW 7 | SW 7 | SW 7 | SW 7 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | |
108 | 312 | 396 | 439 | 342 | 19 | 14 | 10 | 10 | 10 | 10 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 7:03AM3.52m | 7:41PM3.46m | 7:48AM3.79m | 8:21PM3.75m | 8:32AM4.03m | 9:00PM4.00m | ||||||||||||||||||
Low Tide | 1:22AM1.11m | 1:55PM0.61m | 2:15AM0.82m | 2:43PM0.34m | 3:03AM0.52m | 3:29PM0.12m | ||||||||||||||||||
 |  |  | |  |  | | | | |  | | | | |  | | | | | | | | | |
 | — | 5:22 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:06 | — | — | — | — | — | — | — | 9:07 | — | — | — | — | — | — | — | 9:09 | — |
— | 1 | 1 | 1 | 1 | — | 1 | — | — | — | — | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | |
Temp °C | 9 | 8 | 8 | 9 | 10 | 11 | 10 | 9 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 9 | 8 | 9 | 8 | 9 | 9 | 9 | 10 | 9 |
1 | -1 | -2 | 0 | 1 | 4 | 3 | 1 | -1 | -1 | 0 | 1 | 1 | 3 | 4 | 5 | 5 | 3 | 2 | 2 | 2 | 3 | 5 | 5 | |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 8 | SW 7 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 |
 kJ | 7 | 6 | 19 | 6 | 7 | 19 | 14 | 9 | 2 | 2 | 2 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 18 | SSW 8 | SSW 8 | SSW 8 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | S 7 | S 7 | S 7 | — | — | — | — | W 6 | — | — | — | — | — |
| kJ | 12 | 12 | 6 | 6 | 7 | 10 | 10 | 10 | 10 | 10 | 10 | 1 | 1 | 1 | — | — | — | — | 1 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 17 | SW 17 | SW 16 | — | — | S 8 | — | — | — | — | — | — | — | — | SW 14 | — | — | — | — | — | — | — |
| kJ | — | — | 12 | 11 | 10 | — | — | 1 | — | — | — | — | — | — | — | — | 8 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 5 | WNW 6 | NW 6 | NW 7 | NW 7 | NNW 7 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 5 | NNW 5 | NNW 6 |
| kJ | 108 | 312 | 396 | 439 | 342 | 254 | 237 | 396 | 561 | 639 | 423 | 275 | 200 | 164 | 205 | 165 | 77 | 115 | 131 | 114 | 81 | 51 | 46 | 50 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 277 | 287 | 295 | 592 | 925 | 886 | 740 | 605 | 605 | 339 | 587 | 1069 | 352 | 406 | 284 | 5 | 214 | 180 | 325 | 329 | 329 | 284 | 284 | 53 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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