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Surf Forecasts:
Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 6 am Monday 18 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 1.5°C warmer than normal for this time of year)How big are the waves at Harlech today?
The current surf forecast for Harlech at 1PM is: 0.7m 7s primary swell from a West-southwest direction and 0.3m 4s secondary swell from a Northwest direction (forecast issued at 06:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.8m) | 7s |
| Afternoon (18 May) | 2ft (0.6m) | 6s |
| Evening (18 May) | 1.5ft (0.4m) | 6s |
Table - waves today at Harlech. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 22mm), heaviest during Mon night. Very mild (max 13°C on Wed morning, min 10°C on Mon morning). Winds increasing (light winds from the SW on Mon morning, strong winds from the SW by Tue night). | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
WSW 6 | WSW 7 | WSW 7 | WSW 7 | SW 6 | SW 6 | SW 6 | SW 6 | SW 7 | SW 7 | SSW 8 | SW 8 | SW 7 | SW 7 | SW 8 | WSW 8 | WSW 9 | WSW 9 | SW 6 | SW 7 | SW 7 | SW 7 | WSW 7 | SW 6 | |
55 | 62 | 51 | 40 | 34 | 10 | 11 | 47 | 63 | 136 | 150 | 179 | 246 | 289 | 452 | 567 | 553 | 450 | 171 | 278 | 309 | 261 | 154 | 101 | |
Wind (km/h) | ||||||||||||||||||||||||
on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | |
High Tide | 9:43AM4.65m | 10:04PM4.70m | 10:30AM4.48m | 10:50PM4.58m | 11:18AM4.19m | 11:39PM4.36m | ||||||||||||||||||
Low Tide | 4:50PM0.36m | 5:19AM0.23m | 5:40PM0.52m | 6:13AM0.33m | 6:32PM0.71m | |||||||||||||||||||
 |  |  |  | |  |  | | | | | | | | | | | | | | | |  | | |
 | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | 5:09 |
 | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:14 | — | 9:15 |
1 | 1 | — | — | — | 1 | 1 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | — | — | — | — | — | — | |
Temp °C | 9 | 9 | 10 | 11 | 11 | 11 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 |
5 | 6 | 7 | 7 | 7 | 8 | 6 | 5 | 7 | 7 | 8 | 6 | 6 | 5 | 3 | 5 | 6 | 7 | 6 | 8 | 9 | 9 | 9 | 9 | |
Swell 1 Height (m) Direction Period (s) | — | W 12 | WSW 7 | WSW 7 | — | SW 6 | SW 4 | SW 6 | SW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 12 | WSW 5 |
 kJ | — | 3 | 51 | 40 | — | 10 | 11 | 47 | 63 | — | — | — | — | — | — | — | — | — | — | — | — | — | 28 | 42 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 4 | — | — | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 11 |
| kJ | — | — | — | 2 | — | — | 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | WSW 7 | — | — | SW 6 | SW 4 | SE 3 | SE 3 | SSE 4 | SW 7 | SSW 8 | SW 8 | SW 7 | SW 7 | SW 8 | WSW 8 | WSW 9 | WSW 9 | SW 6 | SW 7 | SW 7 | SW 7 | WSW 7 | SW 6 |
| kJ | 55 | 62 | — | — | 34 | 9 | 2 | 4 | 11 | 136 | 150 | 179 | 246 | 289 | 452 | 567 | 553 | 450 | 171 | 278 | 309 | 261 | 154 | 101 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 26 | 26 | 26 | 305 | 207 | 308 | 308 | 299 | 329 | 308 | 355 | 344 | 344 | 284 | 284 | 303 | 303 | 300 | 305 | 430 | 291 | 263 | 43 | 61 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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