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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 Saturday 16 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 7AM is: 0.1m 13s primary swell from a Southwest direction and 0.2m 2s secondary swell from a West-southwest direction (forecast issued at 12:00am May 16). An open ocean swell of 0.4m 5s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 0.5ft (0.1m) | 13s |
| Afternoon (16 May) | 0.5ft (0.1m) | 13s |
| Evening (16 May) | 2ft (0.6m) | 4s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 12°C on Mon afternoon, min 8°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SW by Sun afternoon). | ||||||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SW 13 | SW 13 | SW 13 | SW 13 | S 13 | SW 13 | SW 3 | W 4 | W 4 | W 5 | W 5 | W 5 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 6 | SSW 6 | SSW 3 | SSW 4 | |
7 | 7 | 7 | 7 | 3 | 7 | 7 | 9 | 25 | 54 | 44 | 43 | 37 | 49 | 103 | 115 | 92 | 66 | 52 | 37 | 23 | 22 | 8 | 9 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | glassy | glassy | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | glassy | on | on | on | cross-on | cross | |
High Tide | 9:16AM4.22m | 9:42PM4.19m | 10:02AM4.30m | 10:24PM4.29m | 10:49AM4.27m | |||||||||||||||||||
Low Tide | 3:50AM0.23m | 4:14PM-0.01m | 4:37AM0.01m | 5:00PM-0.03m | 5:24AM-0.11m | 5:47PM0.04m | ||||||||||||||||||
 |  |  | |  | |  |  |  | | | |  | |  | | |  | | |  | | | | |
 | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:14 | — |
— | — | — | — | 1 | 1 | 2 | 1 | — | — | — | 1 | — | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | — | — | |
Temp °C | 9 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 9 | 8 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 9 | 10 | 11 | 12 | 10 |
6 | 6 | 7 | 6 | 6 | 6 | 6 | 5 | 3 | 3 | 4 | 3 | 4 | 3 | 4 | 4 | 4 | 4 | 6 | 6 | 6 | 8 | 9 | 7 | |
Swell 1 Height (m) Direction Period (s) | NNW 5 | N 5 | NNW 5 | NNW 5 | N 4 | N 4 | — | S 13 | S 13 | S 13 | — | — | WNW 4 | — | S 12 | — | — | SW 6 | SW 6 | SW 6 | WNW 4 | — | — | SW 6 |
 kJ | 20 | 13 | 8 | 4 | 1 | 1 | — | 3 | 3 | 3 | — | — | 7 | — | 3 | — | — | 66 | 52 | 37 | 1 | — | — | 5 |
Swell 2 Height (m) Direction Period (s) | SW 13 | WSW 3 | — | SW 13 | S 13 | SW 13 | SW 13 | — | — | — | — | — | S 12 | — | — | — | — | — | — | NW 4 | — | — | — | — |
| kJ | 7 | 1 | — | 7 | 3 | 7 | 7 | — | — | — | — | — | 3 | — | — | — | — | — | — | 4 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | SW 13 | SW 13 | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 7 | 7 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 3 | — | WSW 2 | — | SW 2 | SW 3 | SW 3 | W 4 | W 4 | W 5 | W 5 | W 5 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 | NW 4 | WNW 4 | — | SSW 6 | SSW 6 | SSW 3 | SSW 4 |
| kJ | 3 | — | 1 | — | 2 | 3 | 6 | 9 | 25 | 54 | 44 | 43 | 37 | 49 | 103 | 115 | 92 | 3 | 6 | — | 23 | 22 | 8 | 9 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 272 | 272 | 272 | 272 | 256 | 277 | 272 | 261 | 261 | 261 | 187 | 261 | 261 | 261 | 256 | 256 | 256 | 44 | 0 | 44 | 150 | 259 | 248 | 259 |
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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