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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
12 Day Weather and Surf, issued 5 pm Thursday 18 Dec 2025 GMTForecast 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
11.0° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Whistling Sands (Porth Oer) this week:
The surf forecast for Whistling Sands (Porth Oer) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 21) at 6AM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.6m and 16s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Whistling Sands (Porth Oer) in the next 12 days are 3.5m 10s and forecast to arrive on Saturday (Dec 20) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 6s period and expected on Monday (Dec 22) at 3AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 21st Dec) | 4ft (1.2m) 10s |
| Best Surf | 6AM (Sun 21st Dec) | 4ft (1.2m) 10s |
| Most Powerful | 3PM (Sat 20th Dec) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 12mm), heaviest on Sun morning. Very mild (max 10°C on Thu afternoon, min 8°C on Sun morning). Winds decreasing (near gales from the SSE on Sat morning, light winds from the SSE by Sat night). | Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Sun afternoon. Mild temperatures (max 9°C on Sun afternoon, min 7°C on Sun night). Winds decreasing (near gales from the SSE on Sun night, light winds from the ENE by Tue morning). | ||||||||||||||||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 9 | 6 | 8 | 8 | 7 | 9 | 10 | 10 | 9 | 9 | 16 | 7 | 7 | 6 | 7 | 6 | 8 | 9 | 9 | 8 | 8 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 440 | 319 | 1179 | 714 | 440 | 1582 | 2090 | 508 | 183 | 109 | 26 | 763 | 681 | 76 | 45 | 27 | 36 | 50 | 28 | 11 | 11 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross | cross | cross- off | cross- off | off | cross- off | cross- off | off | cross- off | off | cross- off | off | cross- off | cross | cross | cross | cross- off | cross- off | cross | ||
High Tide / height (m) | 7:21PM 3.41 | 7:39AM 3.58 | 7:58PM 3.48 | 8:14AM 3.69 | 8:33PM 3.52 | 8:49AM 3.77 | 9:07PM 3.52 | 9:24AM 3.81 | 9:41PM 3.49 | 9:59AM 3.83 | 10:17PM 3.43 | 10:36AM 3.80 | 10:56PM 3.35 | 11:16AM 3.75 | |||||||||
Low Tide / height (m) | 2:08AM 0.76 | 2:33PM 0.67 | 2:44AM 0.69 | 3:10PM 0.59 | 3:20AM 0.64 | 3:48PM 0.55 | 3:57AM 0.63 | 4:27PM 0.56 | 4:33AM 0.66 | 5:06PM 0.61 | 5:10AM 0.73 | 5:46PM 0.67 | 5:48AM 0.83 | ||||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||
| Sunrise | - | - | 8:26 | - | - | 8:27 | - | - | 8:27 | - | - | 8:29 | - | - | 8:29 | - | - | 8:30 | - | - | 8:30 | ||
| Sunset | 4:02 | - | - | 4:02 | - | - | 4:04 | - | - | 4:04 | - | - | 4:05 | - | - | 4:05 | - | - | 4:06 | - | - | ||
 |  |  | |  |  | |  | | | | | |  | |  | | | | | | |||
Rain (mm) | 4 | 1 | - | - | - | - | 2 | 2 | 3 | 5 | - | - | - | - | - | - | - | - | - | - | - | ||
| Temp. °C | 10 | 10 | 9 | 10 | 10 | 10 | 9 | 10 | 9 | 9 | 8 | 7 | 8 | 8 | 7 | 7 | 8 | 8 | 7 | 6 | 5 | ||
| Feels °C (?) | 3 | -1 | -2 | 1 | 1 | -2 | -3 | 2 | 3 | -2 | -2 | -1 | 1 | 2 | 3 | 3 | 3 | 3 | 0 | -1 | 1 | ||
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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 12 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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