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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 Sunday 31 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
12.9° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today (31 May):
- Morning surf: Morning surf (31 May, local time) - 1ft (0.3m), 12s period with SW swell.
- Afternoon surf: Afternoon surf (31 May, local time) - 1ft (0.3m), 12s period with SW swell.
- Evening surf: Evening surf (31 May, local time) - 1ft (0.3m), 12s period with SW swell.
The current surf forecast for Cable Bay (Porth Trecastell) at 8AM is: 0.3m 12s primary swell from a Southwest direction and 0.6m 5s secondary swell from a Southwest direction, 0.2m 3s secondary swell from a West-northwest direction (forecast issued at 12:00am May 31). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | 1ft (0.3m) | 12s |
| Afternoon (31 May) | 1ft (0.3m) | 12s |
| Evening (31 May) | 1ft (0.3m) | 12s |
Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 27mm), heaviest during Mon morning. Very mild (max 15°C on Tue afternoon, min 12°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | ||||||||||||||||||||||
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 5 | SW 5 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SW 6 | SSW 5 | SW 6 | SW 6 | SW 6 | SW 7 | SW 7 | SSW 7 | |
37 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 50 | 94 | 86 | 99 | 80 | 74 | 145 | 108 | 69 | 51 | 46 | 34 | 40 | 44 | 47 | 30 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-on | |
High Tide | 10:03AM3.65m | 10:18PM3.78m | 10:40AM3.62m | 10:54PM3.79m | 11:17AM3.55m | |||||||||||||||||||
Low Tide | 4:35AM0.52m | 4:50PM0.60m | 5:12AM0.49m | 5:25PM0.63m | 5:48AM0.50m | 6:00PM0.69m | ||||||||||||||||||
 |  |  |  | | | |  | |  |  | | | | | | | | | |  | | |  | |
 | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:32 | — | — | — | — | — | — | — | 9:34 | — | — | — | — | — | — | — | 9:35 | — |
1 | 1 | — | — | — | — | — | — | — | — | 3 | 3 | 5 | 5 | 4 | 3 | — | 2 | — | — | — | — | — | — | |
Temp °C | 13 | 14 | 13 | 13 | 13 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 13 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 14 |
10 | 12 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 7 | 7 | 9 | 9 | 10 | 10 | 10 | 10 | 12 | 12 | 11 | 11 | 11 | 12 | 10 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | WSW 12 | SW 5 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 14 | SW 10 | SW 14 | SW 14 | SW 6 | SW 6 | SW 6 | SW 6 | NW 4 | SW 7 | SSW 7 |
 kJ | 32 | 15 | 17 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 5 | 5 | 5 | 8 | 4 | 8 | 8 | 10 | 46 | 34 | 40 | 3 | 47 | 30 |
Swell 2 Height (m) Direction Period (s) | W 9 | SW 15 | SW 12 | SW 15 | WNW 3 | — | SW 8 | SW 8 | — | — | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 10 | W 10 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 |
| kJ | 1 | 9 | 24 | 9 | 1 | — | 3 | 2 | — | — | 8 | 8 | 8 | 8 | 8 | 4 | 2 | 7 | 7 | 7 | 7 | 7 | 7 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | SW 15 | — | SW 15 | SW 15 | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | — | SW 13 | — | — | — |
| kJ | — | — | 9 | — | 9 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 7 | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 5 | WNW 3 | SW 5 | SSW 6 | SSW 3 | SSW 4 | SW 4 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SW 6 | SSW 5 | — | WNW 3 | NW 4 | SW 7 | NW 3 | W 3 |
| kJ | 37 | 25 | 1 | 19 | 20 | 7 | 8 | 18 | 50 | 94 | 86 | 99 | 80 | 74 | 145 | 108 | 69 | 51 | — | 1 | 3 | 44 | 2 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 105 | 167 | 168 | 44 | 44 | 319 | 258 | 105 | 105 | 73 | 226 | 198 | 226 | 226 | 248 | 270 | 173 | 118 | 221 | 44 | 44 | 283 | 283 | 44 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
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Ocean Swells (m)- Wind Speed (km/h)
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