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Surf Forecasts:
Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 6 pm 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 2AM is: 1.0m 6s primary swell from a West-southwest direction (forecast issued at 06:00pm May 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 7s |
| Afternoon (18 May) | 2ft (0.6m) | 7s |
| 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 30mm), heaviest during Mon night. Very mild (max 13°C on Wed morning, min 8°C on Sun night). Winds increasing (light winds from the WSW on Sun night, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
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 |  |    |    |    | ||||||||||||||||||||
WSW 4 | SW 5 | WSW 5 | WSW 6 | WSW 6 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | SW 6 | SW 6 | SW 5 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | SW 7 | SW 8 | WSW 8 | WSW 8 | WSW 6 | WSW 6 | SW 6 | |
24 | 57 | 58 | 60 | 64 | 60 | 40 | 41 | 30 | 21 | 10 | 28 | 49 | 99 | 89 | 83 | 226 | 331 | 489 | 527 | 413 | 238 | 159 | 123 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | 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 | |
High Tide | 9:19PM4.68m | 9:43AM4.65m | 10:04PM4.70m | 10:30AM4.48m | 10:50PM4.58m | 11:18AM4.19m | ||||||||||||||||||
Low Tide | 4:02PM0.26m | 4:27AM0.20m | 4:50PM0.36m | 5:19AM0.23m | 5:40PM0.52m | 6:13AM0.33m | ||||||||||||||||||
 | |  |  | |  | |  | |  | | | |  | | | | | | | | | | | |
 | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — | — |
 | — | 9:08 | — | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | 9:14 |
1 | 1 | 1 | 2 | 2 | — | 1 | — | — | — | 1 | 3 | 3 | 5 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | |
Temp °C | 10 | 10 | 9 | 8 | 9 | 9 | 10 | 11 | 11 | 12 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 12 | 13 |
4 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 7 | 9 | 6 | 6 | 7 | 7 | 8 | 6 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 8 | |
Swell 1 Height (m) Direction Period (s) | NW 4 | — | — | — | WSW 6 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | SW 6 | SW 6 | SW 5 | SW 6 | — | — | — | — | — | — | — | — | — | — | — |
 kJ | 1 | — | — | — | 58 | 60 | 40 | 41 | 30 | 21 | 10 | 28 | 49 | — | — | — | — | — | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 12 | W 11 | NW 4 | NW 4 | — | — | WSW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 3 | 3 | 1 | 2 | — | — | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 4 | SW 5 | WSW 5 | WSW 6 | WSW 6 | — | — | — | — | — | SW 4 | SE 3 | SSE 3 | SW 7 | SW 7 | SW 5 | SW 7 | SW 7 | SW 8 | WSW 8 | WSW 8 | WSW 6 | WSW 6 | SW 6 |
| kJ | 24 | 57 | 58 | 60 | 64 | — | — | — | — | — | 7 | 2 | 10 | 99 | 89 | 83 | 226 | 331 | 489 | 527 | 413 | 238 | 159 | 123 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 284 | 284 | 284 | 284 | 26 | 26 | 26 | 26 | 245 | 308 | 299 | 338 | 329 | 207 | 308 | 329 | 285 | 284 | 284 | 303 | 310 | 310 | 399 | 399 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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