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Surf Forecasts:
Harlech surfForecast / Wales – Mid / UK
48hr Weather and Surf, issued 6 pm 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 1AM is: 0.8m 6s primary swell from a Southwest direction (forecast issued at 06:00pm May 18). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 3.5ft (1.1m) | 7s |
| Afternoon (19 May) | 4.5ft (1.4m) | 6s |
| Evening (19 May) | 5.5ft (1.7m) | 7s |
Table - waves today at Harlech. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 21mm), heaviest during Tue morning. Very mild (max 16°C on Thu morning, min 11°C on Mon afternoon). Winds increasing (light winds from the S on Mon afternoon, fresh winds from the SW by Tue night). | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
SW 7 | SW 6 | SW 4 | SW 6 | SSW 6 | SW 7 | SW 7 | SW 6 | SW 6 | SW 7 | SW 7 | WSW 8 | WSW 9 | WSW 9 | WSW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | SW 6 | SW 6 | SW 7 | |
35 | 10 | 14 | 40 | 85 | 112 | 140 | 115 | 127 | 234 | 271 | 500 | 439 | 354 | 160 | 159 | 152 | 112 | 95 | 58 | 45 | 72 | 68 | 57 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | cross | cross | cross | cross | |
High Tide | 10:04PM4.70m | 10:30AM4.48m | 10:50PM4.58m | 11:18AM4.19m | 11:39PM4.36m | 12:10PM3.82m | ||||||||||||||||||
Low Tide | 4:50PM0.36m | 5:19AM0.23m | 5:40PM0.52m | 6:13AM0.33m | 6:32PM0.71m | 7:11AM0.49m | ||||||||||||||||||
 | |  | | |  | |  | | | | |  |  | | | | |  | |  | | | | |
 | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — | — | — |
 | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:14 | — | — | — | — | — | 9:15 |
— | — | 1 | 2 | 3 | 2 | 1 | 4 | 1 | 1 | 1 | 1 | 1 | — | 1 | 1 | — | — | — | — | — | 1 | — | — | |
Temp °C | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 12 | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 12 | 12 | 12 | 12 | 13 | 14 | 16 |
7 | 8 | 7 | 6 | 7 | 7 | 8 | 6 | 7 | 6 | 4 | 4 | 6 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 8 | 10 | 11 | 14 | |
Swell 1 Height (m) Direction Period (s) | — | SW 6 | SW 4 | SW 6 | SW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 10 | WSW 9 | SW 8 | — | SW 7 | — |
 kJ | — | 10 | 14 | 40 | 44 | — | — | — | — | — | — | — | — | — | — | — | — | — | 21 | 17 | 18 | — | 53 | — |
Swell 2 Height (m) Direction Period (s) | WNW 4 | — | SW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 12 | WSW 12 | — | — | — | — |
| kJ | 1 | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 27 | 13 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 3 | SSE 3 | SE 3 | SSW 6 | SW 7 | SW 7 | SW 6 | SW 6 | SW 7 | SW 7 | WSW 8 | WSW 9 | WSW 9 | WSW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | SW 6 | SW 6 | SW 7 |
| kJ | 35 | 5 | 3 | 5 | 85 | 112 | 140 | 115 | 127 | 234 | 271 | 500 | 439 | 354 | 160 | 159 | 152 | 112 | 95 | 58 | 45 | 72 | 68 | 57 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 207 | 308 | 299 | 329 | 329 | 308 | 358 | 344 | 285 | 284 | 285 | 295 | 310 | 300 | 310 | 292 | 291 | 263 | 43 | 61 | 181 | 61 | 151 | 137 |
Best forecast wave conditions in Mid Wales | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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