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Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 12 am Thursday 21 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
12.5° 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 4AM is: 0.8m 8s primary swell from a Southwest direction and 0.7m 9s secondary swell from a West-southwest direction, 0.2m 11s secondary swell from a West-southwest direction (forecast issued at 12:00am May 21). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 3.5ft (1.0m) | 6s |
| Afternoon (21 May) | 3ft (0.9m) | 7s |
| Evening (21 May) | 2ft (0.6m) | 8s |
Table - waves today at Harlech. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Wed night. Very mild (max 17°C on Thu afternoon, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SW 5 | SW 8 | SW 6 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 9 | WSW 9 | SW 9 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | SW 9 | SW 9 | |
45 | 95 | 96 | 84 | 86 | 67 | 60 | 50 | 61 | 33 | 71 | 113 | 106 | 87 | 72 | 59 | 39 | 38 | 38 | 38 | 37 | 36 | 22 | 21 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross | cross | cross-on | cross | cross | cross-on | cross-on | glassy | glassy | |
High Tide | 11:39PM4.36m | 12:10PM3.82m | 00:33AM4.08m | 1:07PM3.44m | 1:33AM3.78m | 2:15PM3.15m | ||||||||||||||||||
Low Tide | 7:11AM0.49m | 7:28PM0.91m | 8:12AM0.66m | 8:27PM1.08m | 9:16AM0.80m | 9:31PM1.20m | ||||||||||||||||||
 |  |  |  | | |  |  | | | | | | | | |  | | |  | | | | | |
 | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:07 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:15 | — | — | — | — | — | — | — | 9:16 | — | — | — | — | — | — | — | 9:17 | — |
— | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 16 | 16 | 15 | 14 | 16 | 17 | 17 | 15 | 14 | 14 | 13 | 13 | 15 | 16 | 16 | 15 | 14 |
7 | 8 | 9 | 11 | 13 | 15 | 17 | 15 | 14 | 13 | 12 | 15 | 16 | 17 | 15 | 14 | 13 | 13 | 13 | 14 | 15 | 15 | 14 | 13 | |
Swell 1 Height (m) Direction Period (s) | SW 5 | WSW 9 | W 11 | — | — | — | SW 8 | SW 8 | SW 9 | WSW 9 | SW 9 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | SW 9 | SW 9 |
 kJ | 45 | 68 | 10 | — | — | — | 60 | 50 | 61 | 33 | 71 | 113 | 106 | 87 | 72 | 59 | 39 | 38 | 38 | 38 | 37 | 36 | 22 | 21 |
Swell 2 Height (m) Direction Period (s) | WSW 9 | WSW 11 | — | — | — | — | — | W 15 | W 15 | — | — | — | — | — | — | WSW 4 | SW 4 | SW 4 | WSW 4 | — | — | — | W 14 | W 14 |
| kJ | 32 | 13 | — | — | — | — | — | 4 | 4 | — | — | — | — | — | — | 3 | 4 | 4 | 1 | — | — | — | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 3 | SW 8 | SW 6 | SW 7 | SW 7 | SW 8 | — | — | — | SSW 4 | — | — | — | — | — | SW 4 | — | — | — | — | — | — | — | — |
| kJ | 1 | 95 | 96 | 84 | 86 | 67 | — | — | — | 7 | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 61 | 207 | 207 | 207 | 137 | 140 | 140 | 125 | 137 | 26 | 0 | 61 | 26 | 26 | 14 | 61 | 80 | 26 | 26 | 125 | 26 | 26 | 26 | 125 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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