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Whistling Sands (Porth Oer) Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Whistling Sands (Porth Oer) surfForecast / Wales – Lleyn / UK
16 Day Weather and Surf, issued 6 am Monday 18 May 2026 BSTForecast update in hr min s Forecast update imminent
Whistling Sands (Porth Oer) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Whistling Sands (Porth Oer) sea temperature is
10.9° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Whistling Sands (Porth Oer) this week:
The surf forecast for Whistling Sands (Porth Oer) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (May 21) at 10PM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.1m and 15s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Whistling Sands (Porth Oer) in the next 16 days are 2.5m 8s and forecast to arrive on Wednesday (May 20) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Tuesday (May 19) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 21st May) | 3.5ft (1.1m) 8s |
| Best Surf | 10PM (Fri 22nd May) | 4ft (1.2m) 11s |
| Most Powerful | 1AM (Wed 20th May) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 11mm), heaviest on Mon night. Very mild (max 13°C on Wed night, min 9°C on Mon morning). Winds increasing (light winds from the SW on Mon morning, strong winds from the SW by Tue night). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri night. Very mild (max 17°C on Thu afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the S on Thu morning, calm by Sat morning). | ||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
WSW 7 | SW 6 | SW 6 | SSW 7 | SW 7 | SW 8 | SW 6 | SW 7 | SW 6 | SSW 7 | SW 7 | SW 9 | SSW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 8 | SW 8 | |
81 | 58 | 64 | 352 | 558 | 1002 | 328 | 696 | 223 | 211 | 162 | 183 | 251 | 208 | 235 | 117 | 76 | 64 | 27 | 17 | 10 | |
Wind (km/h) | |||||||||||||||||||||
cross | cross-off | off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | glassy | cross-on | glassy | glassy | cross-on | cross-off | |
High Tide | 10:14PM4.31m | 10:41AM4.11m | 11:01PM4.22m | 11:30AM3.84m | 11:51PM4.04m | 12:24PM3.52m | 00:46AM3.80m | 1:23PM3.20m | 1:48AM3.57m | 2:34PM2.97m | 3:01AM3.39m | 3:54PM2.89m | |||||||||
Low Tide | 4:52PM0.21m | 5:20AM0.08m | 5:41PM0.37m | 6:14AM0.19m | 6:32PM0.57m | 7:11AM0.36m | 7:27PM0.78m | 8:12AM0.55m | 8:27PM0.97m | 9:17AM0.71m | 9:32PM1.11m | 10:25AM0.80m | 10:41PM1.16m | ||||||||
 | |  |  | | |  |  | | | |  | | | | | |  | | | | |
 | 5:16 | — | — | 5:16 | — | — | 5:13 | — | — | 5:13 | — | — | 5:11 | — | — | 5:09 | — | — | 5:09 | — | — |
 | — | — | 9:13 | — | — | 9:15 | — | — | 9:15 | — | — | 9:17 | — | — | 9:19 | — | — | 9:21 | — | — | 9:22 |
— | — | 7 | 1 | — | 1 | — | — | 2 | — | — | — | — | — | 1 | — | — | — | — | — | — | |
Temp °C | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 15 | 17 | 17 | 16 | 17 | 15 | 14 | 16 | 16 | 15 | 16 | 16 |
5 | 5 | 4 | 4 | 3 | 2 | 4 | 5 | 7 | 9 | 14 | 13 | 14 | 16 | 14 | 13 | 14 | 14 | 15 | 14 | 14 | |
Swell 1 Height (m) Direction Period (s) | WSW 7 | — | SW 6 | — | — | — | — | — | WSW 9 | W 15 | W 15 | SW 9 | SW 13 | WSW 12 | WSW 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 8 | SW 8 |
 kJ | 81 | — | 64 | — | — | — | — | — | 73 | 4 | 4 | 183 | 45 | 56 | 135 | 117 | 76 | 64 | 27 | 17 | 10 |
Swell 2 Height (m) Direction Period (s) | NW 4 | — | — | — | — | — | — | — | — | — | — | SW 15 | — | — | — | — | SW 13 | SW 13 | SW 14 | SW 13 | SW 13 |
| kJ | 2 | — | — | — | — | — | — | — | — | — | — | 9 | — | — | — | — | 7 | 7 | 8 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SW 6 | S 6 | SSW 7 | SW 7 | SW 8 | SW 6 | SW 7 | SW 6 | SSW 7 | SW 7 | — | SSW 10 | SW 10 | SW 10 | — | — | — | — | — | — |
| kJ | — | 58 | 261 | 352 | 558 | 1002 | 328 | 696 | 223 | 211 | 162 | — | 251 | 208 | 235 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 207 | 324 | 324 | 309 | 292 | 288 | 281 | 71 | 163 | 139 | 41 | 139 | 15 | 15 | 4 | 4 | 10 | 113 | 187 | 132 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Whistling Sands (Porth Oer) 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 Whistling Sands (Porth Oer) Surf forecast
The above surf forecast table for Whistling Sands (Porth Oer) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Whistling Sands (Porth Oer) can be found by selecting the local surf guide option on the grey menu. Our Whistling Sands (Porth Oer) 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 (Whistling Sands (Porth Oer)) 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 Whistling Sands (Porth Oer) 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 Whistling Sands (Porth Oer), camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 41 km (25 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 48 km (30 miles) away, Holyhead, Bangor and Aberystwyth.
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