Surf Forecasts:
Porth Nefyn surf forecast from 10 Jun 2026:
- Best quality surf: Saturday 13 Jun, 4AM (local time) - 3ft (0.9m), 6s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 17 Jun, 7PM (local time) - 6ft (1.8m), 6s period, SW swell with 265 kJ wave energy.
- Next surfable swell (1★+): Saturday 13 Jun, 4AM (local time) - 3ft (0.9m), 6s period with WSW swell.
Best Forecast Surf Conditions for Porth Nefyn this week:
The surf forecast for Porth Nefyn over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jun 13) at 4AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.8m and 6s. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Nefyn in the next 16 days are 1.8m 6s and forecast to arrive on Wednesday (Jun 17) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Wednesday (Jun 17) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sat 13th Jun) | 3ft (0.9m) 6s |
| Best Surf | 4AM (Sat 13th Jun) | 3ft (0.9m) 6s |
| Most Powerful | 7PM (Wed 17th Jun) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Porth Nefyn over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 14mm), heaviest on Thu morning. Very mild (max 17°C on Fri afternoon, min 11°C on Wed morning). Winds decreasing (strong winds from the S on Thu morning, light winds from the WSW by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sun afternoon, min 13°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||
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 4 | WSW 4 | WSW 6 | NW 4 | SW 6 | WSW 7 | SW 7 | SW 7 | SW 6 | W 12 | W 12 | W 11 | WSW 3 | SW 4 | SW 6 | W 13 | W 13 | SW 13 | SW 12 | SW 12 | W 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 36 | 0 | 0 | 1 | 136 | 178 | 168 | 114 | 54 | 3 | 3 | 2 | 1 | 1 | 9 | 3 | 3 | 6 | 6 | 6 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | off | cross | cross | cross | cross | cross | cross-off | cross-off | off | glassy | glassy | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 5:14PM2.86m | 5:31AM3.19m | 6:12PM3.09m | 6:30AM3.38m | 7:04PM3.35m | 7:25AM3.57m | 7:54PM3.60m | 8:17AM3.73m | 8:42PM3.82m | 9:08AM3.82m | 9:30PM3.97m | 9:58AM3.81m | 10:19PM4.05m | ||||||||
Low Tide | 11:38AM0.79m | 11:59PM1.05m | 12:40PM0.67m | 1:05AM0.87m | 1:40PM0.53m | 2:06AM0.63m | 2:36PM0.38m | 3:03AM0.37m | 3:29PM0.27m | 3:56AM0.14m | 4:19PM0.20m | 4:48AM-0.02m | 5:08PM0.18m | ||||||||
 |  |  |  |  |  | | |  |  | | |  | | | | |  | | |  | |
 | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — | 4:52 | — | — |
 | — | — | 9:40 | — | — | 9:42 | — | — | 9:43 | — | — | 9:43 | — | — | 9:44 | — | — | 9:45 | — | — | 9:45 |
mm | 1 | — | 3 | 9 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 11 | 14 | 14 | 13 | 15 | 14 | 15 | 17 | 16 | 14 | 16 | 15 | 19 | 21 | 21 | 21 | 20 | 19 | 14 | 15 | 14 |
Feels °C | 6 | 10 | 11 | 9 | 11 | 10 | 11 | 13 | 14 | 12 | 14 | 14 | 20 | 21 | 21 | 18 | 19 | 18 | 11 | 10 | 8 |
Swell 1 Height (m) Direction Period (s) | — | — | — | NW 4 | — | — | — | — | SW 6 | NW 4 | WNW 4 | W 11 | WSW 3 | SW 4 | SW 6 | W 13 | W 13 | SW 13 | SW 12 | SW 12 | SW 12 |
| kJ | — | — | — | 1 | — | — | — | — | 54 | 3 | 1 | 2 | 1 | 1 | 9 | 3 | 3 | 6 | 6 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 14 | W 11 | W 11 | SW 6 | SW 5 | — | — | W 13 | W 10 | W 10 | W 9 | — | W 14 |
| kJ | — | — | — | — | — | — | — | — | 4 | 3 | 2 | 2 | 1 | — | — | 3 | 2 | 2 | 2 | — | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 12 | W 12 | W 11 | — | — | — | W 11 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 3 | 3 | 2 | — | — | — | 2 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 4 | WSW 4 | WSW 6 | SW 5 | SW 6 | WSW 7 | SW 7 | SW 7 | WNW 4 | SW 6 | SW 5 | SW 4 | — | — | — | SW 5 | SSW 4 | SSW 3 | SW 5 | SSW 4 | SW 6 |
| kJ | 36 | 19 | 40 | 119 | 136 | 178 | 168 | 114 | 10 | 21 | 14 | 11 | — | — | — | 6 | 2 | 4 | 25 | 25 | 79 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 635 | 477 | 283 | 286 | 287 | 287 | 13 | 346 | 13 | 142 | 150 | 128 | 128 | 128 | 141 | 197 | 148 | 148 | 268 | 268 | 217 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Porth Nefyn surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Porth Nefyn Surf forecast
The above surf forecast table for Porth Nefyn provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Porth Nefyn can be found by selecting the local surf guide option on the grey menu. Our Porth Nefyn 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 (Porth Nefyn) 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 Porth Nefyn 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.
Are you planning a holiday in Lleyn Peninsula? If you are looking for accommodation near Porth Nefyn, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 27 km (17 miles) away. Other places in and around Lleyn Peninsula where you can find information about places to rent, and car hire include Anglesey which is 35 km (22 miles) away, Holyhead, Bangor and Llandudno.
Nearest