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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 Wednesday 20 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
11.4° 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 11PM is: 1.6m 6s primary swell from a South-southwest direction and 0.1m 13s secondary swell from a Southwest direction (forecast issued at 06:00pm May 20). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | - | - |
| Afternoon (20 May) | 6ft (1.8m) | 6s |
| Evening (20 May) | 5.5ft (1.7m) | 6s |
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 3mm), mostly falling on Wed night. Very mild (max 17°C on Thu night, min 11°C on Wed afternoon). Winds decreasing (fresh winds from the SW on Wed afternoon, light winds from the S by Fri night). | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 5 | SW 5 | SW 10 | SW 10 | SSW 7 | SW 6 | |
253 | 222 | 209 | 179 | 138 | 193 | 230 | 179 | 119 | 103 | 78 | 68 | 52 | 71 | 90 | 80 | 75 | 40 | 47 | 35 | 16 | 15 | 30 | 20 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | |
High Tide | 00:50AM4.04m | 1:31PM3.54m | 1:49AM3.84m | 2:41PM3.27m | 2:59AM3.64m | |||||||||||||||||||
Low Tide | 7:26PM0.43m | 8:01AM0.17m | 8:20PM0.68m | 9:00AM0.39m | 9:18PM0.91m | 10:05AM0.59m | ||||||||||||||||||
 |  |  | |  |  | | | | |  | |  | | | | | | |  | |  | | | |
 | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:07 | — | — | — |
 | — | 9:16 | — | — | — | — | — | — | — | 9:19 | — | — | — | — | — | — | — | 9:20 | — | — | — | — | — | 9:22 |
— | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | |
Temp °C | 12 | 11 | 12 | 12 | 12 | 12 | 13 | 14 | 15 | 15 | 16 | 17 | 16 | 14 | 14 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 14 | 14 |
5 | 6 | 7 | 7 | 6 | 7 | 8 | 9 | 10 | 11 | 14 | 13 | 12 | 11 | 10 | 11 | 11 | 12 | 11 | 11 | 12 | 11 | 12 | 12 | |
Swell 1 Height (m) Direction Period (s) | WSW 14 | WSW 13 | SW 13 | SW 10 | — | — | SW 15 | — | — | S 15 | SSW 7 | S 15 | SW 15 | — | SW 7 | SW 10 | SW 11 | SW 11 | SW 10 | SW 10 | SW 7 | SW 7 | SSW 7 | SW 13 |
 kJ | 19 | 16 | 7 | 24 | — | — | 9 | — | — | 4 | 78 | 4 | 8 | — | 54 | 39 | 18 | 18 | 17 | 16 | 12 | 12 | 30 | 7 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 15 | S 15 | — | SW 15 | — | WSW 10 | — | — | — | — | SW 14 | SW 10 | SW 10 | SW 13 | SW 13 |
| kJ | — | — | — | — | — | — | — | — | — | 4 | 4 | — | 8 | — | 21 | — | — | — | — | 8 | 15 | 15 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | S 16 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 5 | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | — | SSW 7 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 5 | SW 5 | SW 4 | SW 4 | — | SW 6 |
| kJ | 253 | 222 | 209 | 179 | 138 | 193 | 230 | 179 | 119 | 103 | — | 68 | 52 | 71 | 90 | 80 | 75 | 40 | 47 | 35 | 16 | 8 | — | 20 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 243 | 243 | 89 | 105 | 248 | 248 | 226 | 179 | 181 | 181 | 45 | 118 | 179 | 49 | 179 | 44 | 185 | 44 | 63 | 44 | 44 | 44 | 118 | 44 |
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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