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Surf Forecasts:
Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 12 am Sunday 17 May 2026 BSTForecast update in hr min s Forecast update imminent
Harlech surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Harlech sea temperature is
12.4° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at Harlech today?
The current surf forecast for Harlech at 3AM is: 0.8m 4s primary swell from a West direction (forecast issued at 12:00am May 17). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 2.5ft (0.8m) | 5s |
| Afternoon (17 May) | 3ft (0.9m) | 4s |
| Evening (17 May) | 3.5ft (1.0m) | 5s |
Table - waves today at Harlech. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 21mm), heaviest during Sun night. Very mild (max 12°C on Tue morning, min 8°C on Sat night). Winds increasing (calm on Sun night, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
W 4 | W 4 | W 5 | WSW 5 | WSW 4 | WSW 4 | SW 5 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | SW 6 | WSW 6 | SW 4 | SW 5 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 | |
22 | 24 | 27 | 28 | 27 | 32 | 60 | 53 | 39 | 38 | 26 | 31 | 23 | 16 | 9 | 9 | 3 | 3 | 14 | 49 | 111 | 261 | 309 | 242 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | glassy | glassy | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | |
High Tide | 8:57AM4.68m | 9:19PM4.68m | 9:43AM4.65m | 10:04PM4.70m | 10:30AM4.48m | |||||||||||||||||||
Low Tide | 3:37AM0.28m | 4:02PM0.26m | 4:27AM0.20m | 4:50PM0.36m | 5:19AM0.23m | 5:40PM0.52m | ||||||||||||||||||
 |  |  |  | |  | |  |  | | |  | | | | | | | | | | | | | |
 | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:08 | — | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — |
— | — | — | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 2 | — | — | — | — | — | 1 | 1 | 3 | 2 | 1 | 1 | — | — | |
Temp °C | 9 | 8 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 12 |
5 | 4 | 5 | 6 | 4 | 5 | 4 | 5 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 6 | 7 | 6 | 7 | 8 | 6 | 6 | 7 | 7 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | NW 4 | — | — | — | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | SW 6 | WSW 6 | SW 4 | SW 5 | — | — | — | — | — |
 kJ | — | — | — | — | 7 | — | — | — | 39 | 38 | 26 | 26 | 23 | 16 | 9 | 9 | 3 | 3 | 14 | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 12 | W 12 | WNW 4 | WNW 4 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 3 | 3 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | W 4 | W 5 | WSW 5 | WSW 4 | WSW 4 | SW 5 | WSW 6 | — | — | — | WSW 6 | WNW 4 | — | — | — | — | SE 3 | SE 3 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 |
| kJ | 22 | 24 | 27 | 28 | 27 | 32 | 60 | 53 | — | — | — | 31 | 1 | — | — | — | — | 2 | 4 | 49 | 111 | 261 | 309 | 242 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 281 | 281 | 281 | 281 | 142 | 284 | 284 | 284 | 284 | 284 | 284 | 26 | 26 | 26 | 125 | 263 | 308 | 308 | 299 | 329 | 344 | 355 | 351 | 284 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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