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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 30 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
12.8° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Cable Bay (Porth Trecastell) today (30 May):
- Morning surf: Morning surf (30 May, local time) - 2.5ft (0.8m), 4s period with SSW swell.
- Afternoon surf: Afternoon surf (30 May, local time) - 2.5ft (0.7m), 4s period with SSW swell.
- Evening surf: Evening surf (30 May, local time) - 2.5ft (0.8m), 4s period with SSW swell.
The current surf forecast for Cable Bay (Porth Trecastell) at 6AM is: 0.8m 4s primary swell from a South-southwest direction and 0.1m 16s secondary swell from a Southwest direction, 0.1m 11s secondary swell from a Southwest direction (forecast issued at 12:00am May 30). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 May) | 2.5ft (0.8m) | 4s |
| Afternoon (30 May) | 2.5ft (0.7m) | 4s |
| Evening (30 May) | 2.5ft (0.8m) | 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 ForecastLight rain (total 7mm), mostly falling on Sat night. Very mild (max 14°C on Sat morning, min 12°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||||||
Saturday 30 | Sunday 31 | Monday 1 | ||||||||||||||||||||||
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 | SSW 5 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 5 | SW 5 | SW 5 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | |
38 | 29 | 20 | 19 | 19 | 14 | 13 | 28 | 43 | 35 | 26 | 23 | 23 | 23 | 23 | 23 | 23 | 25 | 42 | 64 | 55 | 56 | 78 | 81 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | |
High Tide | 9:25AM3.63m | 9:43PM3.74m | 10:03AM3.65m | 10:18PM3.78m | 10:40AM3.62m | |||||||||||||||||||
Low Tide | 3:58AM0.59m | 4:14PM0.59m | 4:35AM0.52m | 4:50PM0.60m | 5:12AM0.49m | 5:25PM0.63m | ||||||||||||||||||
 | |  | |  |  | |  |  | | | | | | | | | |  | | | | |  | |
 | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:31 | — | — | — | — | — | — | — | 9:32 | — | — | — | — | — | — | — | 9:34 | — |
— | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 1 | 2 | 7 | |
Temp °C | 13 | 12 | 12 | 13 | 14 | 14 | 14 | 12 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 13 | 13 | 14 | 14 |
9 | 8 | 8 | 9 | 10 | 10 | 11 | 8 | 8 | 10 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 8 | 8 | 8 | 10 | 10 | 13 | 13 | |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 14 | SW 14 | SW 14 |
 kJ | 9 | 9 | 10 | 10 | 8 | 8 | 7 | 7 | 32 | 15 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 5 | 5 | 5 | 5 | 8 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 8 | SW 9 | W 9 | SW 15 | SW 15 | SW 15 | WNW 3 | WNW 3 | SW 8 | SW 8 | SW 8 | — | SW 14 | SW 14 | SW 14 | SW 11 | SW 14 | SW 10 |
| kJ | 5 | 5 | 5 | 5 | 4 | 4 | 2 | 3 | 1 | 9 | 9 | 9 | 1 | 1 | 3 | 2 | 2 | — | 8 | 8 | 8 | 5 | 8 | 4 |
Swell 3 Height (m) Direction Period (s) | — | SW 9 | W 9 | W 9 | S 11 | SW 8 | — | W 9 | — | — | — | — | SW 15 | SW 15 | — | — | — | SW 14 | — | — | — | — | — | — |
| kJ | — | 3 | 2 | 2 | 2 | 3 | — | 2 | — | — | — | — | 9 | 9 | — | — | — | 8 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | SSW 5 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SSW 5 | SW 4 | SW 4 | SW 5 | SW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 |
| kJ | 38 | 29 | 20 | 19 | 19 | 14 | 13 | 28 | 43 | 35 | 26 | 17 | 12 | 18 | 10 | 15 | 18 | 25 | 42 | 64 | 55 | 56 | 78 | 81 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 172 | 150 | 118 | 179 | 299 | 44 | 248 | 167 | 105 | 105 | 44 | 44 | 319 | 338 | 294 | 105 | 105 | 73 | 226 | 196 | 226 | 179 | 258 | 226 |
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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