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Surf Forecasts:
Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 12 am Wednesday 20 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 7AM is: 1.5m 9s primary swell from a West-southwest direction (forecast issued at 12:00am May 20). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 5ft (1.6m) | 6s |
| Afternoon (20 May) | 4.5ft (1.4m) | 6s |
| Evening (20 May) | 3.5ft (1.0m) | 6s |
Table - waves today at Harlech. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Very mild (max 17°C on Fri morning, min 11°C on Tue night). Winds decreasing (fresh winds from the SSW on Tue night, light winds from the SSE by Thu afternoon). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
WSW 8 | WSW 9 | WSW 9 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | SW 5 | WSW 8 | SW 6 | SW 6 | SW 7 | SW 8 | SW 8 | WSW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | |
513 | 459 | 378 | 177 | 182 | 147 | 95 | 44 | 49 | 31 | 59 | 56 | 60 | 62 | 45 | 53 | 55 | 74 | 74 | 88 | 100 | 104 | 41 | 40 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross | |
High Tide | 10:50PM4.58m | 11:18AM4.19m | 11:39PM4.36m | 12:10PM3.82m | 00:33AM4.08m | 1:07PM3.44m | ||||||||||||||||||
Low Tide | 6:13AM0.33m | 6:32PM0.71m | 7:11AM0.49m | 7:28PM0.91m | 8:12AM0.66m | 8:27PM1.08m | ||||||||||||||||||
 | |  |  |  | | |  |  |  | |  | | | |  | | | | | | | | | |
 | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:14 | — | — | — | — | — | — | — | 9:15 | — | — | — | — | — | — | — | 9:16 | — |
2 | 1 | — | 1 | 1 | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 12 | 11 | 11 | 12 | 13 | 13 | 12 | 12 | 11 | 12 | 13 | 14 | 15 | 16 | 16 | 16 | 16 | 15 | 15 | 16 | 17 | 17 | 15 | 14 |
5 | 6 | 6 | 6 | 8 | 8 | 9 | 9 | 7 | 9 | 10 | 11 | 12 | 14 | 15 | 16 | 15 | 13 | 13 | 14 | 16 | 17 | 14 | 13 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | — | — | WSW 7 | SW 5 | WSW 8 | WSW 8 | — | — | — | SW 8 | SW 8 | WSW 9 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 |
 kJ | — | — | — | — | — | — | — | 34 | 49 | 26 | 59 | — | — | — | 45 | 53 | 55 | 74 | 74 | 88 | 58 | 59 | 41 | 40 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | WSW 12 | WSW 12 | WSW 9 | W 11 | — | — | — | — | W 15 | W 15 | — | — | — | — | — | SW 4 | WSW 4 |
| kJ | — | — | — | — | — | — | — | 27 | 13 | 31 | 10 | — | — | — | — | 4 | 4 | — | — | — | — | — | 4 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WSW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | WSW 9 | WSW 9 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | S 3 | SW 5 | SW 5 | SW 6 | SW 6 | SW 7 | — | — | — | SE 2 | — | — | SW 10 | SW 10 | SW 4 | SW 4 |
| kJ | 513 | 459 | 378 | 177 | 182 | 147 | 95 | 44 | 1 | 30 | 40 | 56 | 60 | 62 | — | — | — | 1 | — | — | 100 | 104 | 6 | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 285 | 303 | 301 | 279 | 399 | 263 | 263 | 43 | 61 | 151 | 151 | 137 | 137 | 140 | 80 | 80 | 80 | 0 | 0 | 137 | 26 | 26 | 26 | 80 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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