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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 pm Thursday 14 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 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 12AM is: 0.1m 14s primary swell from a Southwest direction and 0.1m 7s secondary swell from a West direction (forecast issued at 06:00pm May 14). An open ocean swell of 2.0m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 0.5ft (0.1m) | 14s |
| Afternoon (15 May) | 0.5ft (0.1m) | 14s |
| Evening (15 May) | 0.5ft (0.1m) | 13s |
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 5mm), mostly falling on Thu afternoon. Very mild (max 10°C on Thu afternoon, min 8°C on Thu night). Winds decreasing (fresh winds from the N on Thu afternoon, calm by Fri night). | ||||||||||||||||||||||||
Thu 14 | Friday 15 | Saturday 16 | Sun 17 | |||||||||||||||||||||
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 | 4 AM | 7 AM | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | S 13 | SW 13 | SW 3 | SW 4 | SW 4 | SW 4 | SW 4 | NW 4 | W 4 | NW 4 | SW 4 | |
8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 3 | 7 | 9 | 17 | 20 | 8 | 5 | 7 | 14 | 7 | 11 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | glassy | glassy | on | cross-on | on | cross-on | cross-on | cross | cross-on | cross-on | on | on | |
High Tide | 8:21PM3.75m | 8:32AM4.03m | 9:00PM4.00m | 9:16AM4.22m | 9:42PM4.19m | 10:02AM4.30m | ||||||||||||||||||
Low Tide | 2:43PM0.34m | 3:03AM0.52m | 3:29PM0.12m | 3:50AM0.23m | 4:14PM-0.01m | 4:37AM0.01m | ||||||||||||||||||
 | |  |  | |  |  |  | | | |  | | | | |  | | | | | | | | |
 | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — |
 | — | 9:07 | — | — | — | — | — | — | — | 9:09 | — | — | — | — | — | — | — | 9:10 | — | — | — | — | — | 9:13 |
1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | |
Temp °C | 10 | 10 | 9 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 9 | 10 | 10 | 10 | 10 | 8 | 9 | 9 | 10 |
3 | 3 | 4 | 3 | 1 | 0 | 1 | 2 | 2 | 4 | 5 | 6 | 7 | 7 | 6 | 4 | 6 | 6 | 7 | 6 | 3 | 6 | 4 | 4 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | NNW 6 | N 5 | N 5 | N 5 | N 5 | N 4 | — | SW 13 | SW 4 | SW 4 | SW 4 | — | NW 4 | NW 4 |
 kJ | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 40 | 28 | 19 | 12 | 4 | 1 | — | 7 | 8 | 4 | 5 | — | 5 | 2 |
Swell 2 Height (m) Direction Period (s) | S 7 | — | W 7 | — | — | — | — | — | — | — | SW 13 | SW 13 | SW 13 | S 13 | SW 13 | SW 13 | S 13 | — | S 13 | S 13 | S 13 | W 13 | — | — |
| kJ | 1 | — | 1 | — | — | — | — | — | — | — | 7 | 7 | 7 | 3 | 7 | 7 | 3 | — | 3 | 3 | 3 | 3 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 13 | W 13 | W 13 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 7 | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | — | — | — | — | SW 2 | SW 3 | SW 4 | SW 4 | NW 3 | NW 3 | NW 4 | W 4 | SW 4 | SW 4 |
| kJ | 205 | 352 | 423 | 326 | 242 | 253 | 212 | 137 | 81 | 50 | — | — | — | — | 1 | 9 | 17 | 20 | 2 | 5 | 7 | 14 | 7 | 11 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1753 | 881 | 324 | 53 | 53 | 325 | 329 | 284 | 284 | 272 | 272 | 272 | 272 | 259 | 272 | 256 | 277 | 277 | 277 | 261 | 186 | 185 | 187 | 261 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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