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Surf Forecasts:
Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 6 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
12.3° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Harlech today?
The current surf forecast for Harlech at 10AM is: 0.8m 5s primary swell from a West direction (forecast issued at 06:00am 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) | 3ft (0.9m) | 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 23mm), heaviest during Mon night. Very mild (max 13°C on Tue morning, min 8°C on Sun night). Winds increasing (calm on Sun night, strong winds from the SW by Tue night). | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
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 | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
W 4 | W 5 | W 5 | WSW 5 | WSW 4 | WSW 5 | WSW 5 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | WSW 6 | SW 5 | SW 6 | SW 7 | SW 5 | SW 6 | SW 7 | SW 7 | SW 7 | |
25 | 27 | 28 | 22 | 30 | 52 | 46 | 40 | 30 | 26 | 26 | 19 | 15 | 9 | 9 | 3 | 11 | 28 | 91 | 49 | 138 | 293 | 261 | 231 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | 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 | 10:50PM4.58m | ||||||||||||||||||
Low Tide | 4:02PM0.26m | 4:27AM0.20m | 4:50PM0.36m | 5:19AM0.23m | 5:40PM0.52m | |||||||||||||||||||
 |  |  |  | | |  | |  | | |  | | | | | | | | | | | | | |
 | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | 5:11 |
 | — | — | — | — | — | 9:08 | — | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | 9:14 |
— | — | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | — | — | 1 | 2 | 3 | 2 | 1 | 1 | — | — | 3 | |
Temp °C | 8 | 9 | 9 | 10 | 10 | 9 | 9 | 8 | 8 | 9 | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 11 | 12 | 13 | 12 | 12 | 12 | 12 |
4 | 5 | 5 | 4 | 4 | 5 | 6 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 6 | 6 | 8 | 9 | 10 | 6 | 6 | 6 | 5 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | W 12 | NW 4 | — | W 12 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | WSW 6 | SW 5 | SW 6 | — | — | — | — | — | — |
 kJ | — | — | — | 3 | 3 | — | 3 | 40 | 30 | 26 | 26 | 19 | 15 | 9 | 9 | 3 | 11 | 28 | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 12 | W 12 | NW 4 | WNW 4 | — | — | — | — | SW 4 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 3 | 3 | 1 | 1 | — | — | — | — | 2 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | W 5 | W 5 | WSW 5 | WSW 4 | WSW 5 | WSW 5 | — | — | — | — | — | — | — | — | SE 2 | SE 3 | SE 3 | SW 7 | SW 5 | SW 6 | SW 7 | SW 7 | SW 7 |
| kJ | 25 | 27 | 28 | 22 | 30 | 52 | 46 | — | — | — | — | — | — | — | — | 2 | 4 | 5 | 91 | 49 | 138 | 293 | 261 | 231 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 284 | 284 | 137 | 142 | 284 | 284 | 284 | 284 | 284 | 26 | 26 | 26 | 26 | 263 | 263 | 245 | 245 | 255 | 329 | 344 | 308 | 336 | 284 | 284 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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