Surf Forecasts:
Harlech surf forecast from 13 Nov 2026:
- Best quality surf: Tuesday 17 Nov, 3PM (local time) - 4.5ft (1.3m), 11s period, WSW swell with glassy winds.
- Most powerful swell: Wednesday 18 Nov, 12AM (local time) - 4ft (1.2m), 13s period, WSW swell with 514 kJ wave energy.
- Next surfable swell (1★+): Tuesday 17 Nov, 3PM (local time) - 4.5ft (1.3m), 11s period with WSW swell.
Best Forecast Surf Conditions for Harlech this week:
The surf forecast for Harlech over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Nov 17) at 3PM. The primary swell is predicted to be 1.3m and 11s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Harlech in the next 16 days are 1.2m 13s and forecast to arrive on Wednesday (Nov 18) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Tuesday (Nov 17) at 9AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 17th Nov) | 4.5ft (1.3m) 11s |
| Best Surf | 3PM (Tue 17th Nov) | 4.5ft (1.3m) 11s |
| Most Powerful | 12AM (Wed 18th Nov) | 4ft (1.2m) 13s |
Table - best surf conditions forecast for Harlech over the next 16 days.
Short Range ForecastModerate rain (total 19mm), heaviest on Sun morning. Very mild (max 11°C on Sun morning, min 5°C on Fri morning). Winds increasing (calm on Fri afternoon, strong winds from the NW by Sun night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Mon morning. Mild temperatures (max 6°C on Mon morning, min 3°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WSW 9 | WSW 9 | SW 14 | SSW 4 | SW 5 | SW 7 | SW 8 | WSW 5 | NW 8 | WNW 5 | W 5 | SW 9 | WSW 9 | WSW 11 | WSW 13 | WSW 13 | WSW 12 | WSW 13 | WSW 15 | WSW 14 | WSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 8 | 8 | 15 | 57 | 102 | 224 | 75 | 416 | 78 | 29 | 21 | 8 | 400 | 514 | 257 | 123 | 154 | 188 | 183 | 113 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | cross-off | cross | cross-off | cross-on | cross-on | cross-on | on | on | off | cross-off | glassy | off | off | cross-off | off | cross-off | glassy | off |
High Tide | 9:56AM3.96m | 10:16PM3.60m | 10:32AM3.74m | 10:53PM3.33m | 11:12AM3.51m | 11:34PM3.07m | 11:57AM3.28m | 00:25AM2.84m | 12:55PM3.11m | 1:35AM2.72m | 2:09PM3.05m | 3:03AM2.79m | 3:27PM3.17m | ||||||||
Low Tide | 4:52PM0.93m | 4:53AM1.14m | 5:38PM1.12m | 5:39AM1.31m | 6:31PM1.28m | 6:35AM1.45m | 7:32PM1.38m | 7:38AM1.53m | 8:35PM1.38m | 8:45AM1.54m | 9:37PM1.29m | 9:51AM1.45m | 10:36PM1.11m | ||||||||
 | |  | |  |  |  |  |  |  | | | | |  | | | |  | |  | |
 | 7:33 | — | — | 7:35 | — | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — | 7:43 | — | — | 7:45 | — | — |
 | — | 4:24 | — | — | 4:23 | — | — | 4:22 | — | — | 4:21 | — | — | 4:19 | — | — | 4:17 | — | — | 4:16 | — |
mm | — | — | — | — | — | 3 | 10 | 4 | 2 | 2 | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 7 | 8 | 7 | 8 | 9 | 8 | 11 | 10 | 6 | 6 | 6 | 5 | 6 | 6 | 5 | 6 | 5 | 5 | 6 | 6 | 4 |
Feels °C | 4 | 5 | 5 | 2 | 3 | 2 | 6 | 5 | -5 | -2 | 0 | 1 | 3 | 3 | 1 | 3 | 2 | 1 | 3 | 4 | 0 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 9 | SW 8 | SW 13 | WSW 12 | SW 7 | SW 8 | — | WSW 10 | — | SW 9 | SW 9 | WSW 9 | WSW 11 | WSW 13 | WSW 13 | WSW 12 | WSW 13 | WSW 15 | WSW 14 | WSW 13 |
| kJ | 8 | 8 | 3 | 7 | 14 | 102 | 224 | — | 97 | — | 21 | 21 | 8 | 400 | 514 | 257 | 123 | 154 | 188 | 183 | 113 |
Swell 2 Height (m) Direction Period (s) | NNW 5 | — | SW 14 | SW 11 | — | WSW 11 | — | — | — | — | — | NNW 4 | — | — | — | NNW 4 | NW 4 | — | — | — | — |
| kJ | 2 | — | 8 | 5 | — | 12 | — | — | — | — | — | 2 | — | — | — | 7 | 1 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | W 16 | — | SW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 5 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 2 | SSW 4 | SW 5 | SSE 4 | — | WSW 5 | NW 8 | WNW 5 | W 5 | — | E 5 | NE 4 | NNE 3 | — | — | — | — | E 2 | — |
| kJ | — | — | 1 | 15 | 57 | 13 | — | 75 | 416 | 78 | 29 | — | 94 | 18 | 4 | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 130 | 138 | 189 | 137 | 288 | 311 | 128 | 285 | 229 | 217 | 137 | 281 | 217 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Mid Wales | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Harlech Surf forecast
The above surf forecast table for Harlech provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Harlech can be found by selecting the local surf guide option on the grey menu. Our Harlech surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Harlech) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Harlech may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Harlech is 9 km (6 miles) from Porthmadog. If you plan a holiday in Mid Wales, look for hotels and other accommodation in Porthmadog. Porthmadog has rooms for a wide range of budgets as well as car hire and transport links.
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