Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 7 Sep 2026:
- Most powerful swell: Monday 7 Sep, 10PM (local time) - 7.5ft (2.3m), 6s period, SW swell with 431 kJ wave energy.
Best Forecast Surf Conditions for Whistling Sands (Porth Oer) this week:
The most powerful waves expected at Whistling Sands (Porth Oer) in the next 16 days are 2.3m 6s and forecast to arrive on Monday (Sep 07) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Wednesday (Sep 09) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Mon 7th Sep) | 7.5ft (2.3m) 6s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin' for Whistling Sands (Porth Oer). I gotta be straight with you, this one is a tough stretch.
The whole 16-day forecast is a real heartbreaker. We’ve got a patchy run of tiny to moderate swell, but the wind just won’t play ball. The spot is a sheltered beginner wave, so it needs everything to line up, and frankly, it almost never does in this outlook.
There is one single, brief moment that wets the appetite. On Tuesday the 15th of September, the morning session offers up 5ft of swell from the W. The wind goes glassy with a slight air from the S, turning cross-offshore. That combo yields clean conditions and the only “surfable” rating of the whole window. The combined swell energy is moderate at 130. For an inconsistent, sheltered spot like this, getting a clean window with that much size is a rare treat. Beginners might find that swell a touch challenging, but for anyone else, that’s your one and only window.
Outside of that, the rest of the run is a write-off. The wind is either too strong, onshore, or cross-shore, turning what little swell there is into a messy, choppy, or blown-out mess. The period on the swells is short, mostly between 4 and 9 seconds, so they lack any real punch.
Most of the second week sees the swell pumping up with some serious energy – like on Saturday the 20th of September, the afternoon shows a 8ft swell from the WNW with combined energy hitting 537, which is strong. But it’s being hammered by a fresh cross-onshore breeze, creating lumpy, terrible surf. That kind of power with onshore wind is only good for a beating.
So there you have it. One clean, surfable morning on the 15th. The rest is a waiting game. Stay hopeful, the pattern can always shift.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon night. Very mild (max 17°C on Sun night, min 13°C on Mon night). Winds decreasing (near gales from the SW on Mon night, light winds from the W by Wed afternoon). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Very mild (max 17°C on Thu night, min 14°C on Fri morning). Winds increasing (calm on Fri afternoon, strong winds from the SSW by Sat morning). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 14 | SW 5 | SW 7 | WSW 5 | W 5 | NW 6 | SW 8 | NW 5 | SW 3 | SW 4 | SW 5 | SW 6 | SW 7 | SW 8 | SW 8 | SSW 5 | SW 7 | SW 7 | SW 7 | SW 6 | SW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 79 | 113 | 424 | 100 | 106 | 248 | 48 | 37 | 9 | 34 | 0 | 200 | 65 | 66 | 35 | 0 | 289 | 105 | 27 | 14 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross-on | on | on | cross-on | cross-off | cross-off | cross-off | cross | on | cross-on | cross-off | cross-off | cross | cross | cross-on | cross-off | cross-off |
High Tide | 5:28AM2.98m | 6:01PM3.28m | 6:41AM3.22m | 7:03PM3.65m | 7:36AM3.52m | 7:53PM4.02m | 8:20AM3.78m | 8:36PM4.30m | 9:01AM3.98m | 9:16PM4.46m | 9:39AM4.09m | 9:55PM4.48m | 10:15AM4.11m | 10:32PM4.37m | |||||||
Low Tide | 12:42PM1.09m | 1:21AM0.71m | 1:43PM0.77m | 2:16AM0.35m | 2:31PM0.47m | 3:02AM0.05m | 3:14PM0.23m | 3:43AM-0.12m | 3:53PM0.09m | 4:21AM-0.15m | 4:29PM0.06m | 4:55AM-0.05m | 5:03PM0.13m | ||||||||
 |  |  |  | |  | | | | | |  | | | |  | | | | | | |
 | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — |
 | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:46 | — | — | 7:45 | — | — | 7:42 | — | — | 7:39 | — |
mm | — | — | 3 | — | — | — | — | — | — | — | — | 2 | — | — | — | 1 | 1 | — | — | — | — |
Temp °C | 15 | 16 | 15 | 14 | 16 | 14 | 14 | 14 | 15 | 15 | 16 | 17 | 14 | 15 | 16 | 16 | 17 | 18 | 17 | 17 | 17 |
Feels °C | 11 | 10 | 6 | 6 | 9 | 5 | 8 | 11 | 11 | 9 | 10 | 13 | 11 | 14 | 14 | 9 | 11 | 16 | 16 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | NNW 4 | — | WSW 11 | — | SW 6 | SW 8 | NNW 6 | NNW 5 | — | — | — | SW 7 | SW 8 | SW 8 | — | — | SW 7 | SW 7 | SW 6 | — |
| kJ | 79 | 2 | — | 11 | — | 58 | 48 | 62 | 5 | — | — | — | 65 | 66 | 35 | — | — | 105 | 27 | 14 | — |
Swell 2 Height (m) Direction Period (s) | WSW 10 | — | — | — | — | SW 11 | — | SW 8 | — | — | — | — | — | — | NNW 4 | — | — | — | — | NNW 3 | — |
| kJ | 9 | — | — | — | — | 4 | — | 21 | — | — | — | — | — | — | 1 | — | — | — | — | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 5 | SW 7 | WSW 5 | W 5 | NW 6 | NNW 6 | NW 5 | SW 3 | SW 4 | SW 5 | SW 6 | NW 3 | NW 4 | SSW 2 | SSW 5 | SW 7 | — | NW 3 | — | SW 4 |
| kJ | 49 | 113 | 424 | 100 | 106 | 248 | 185 | 37 | 9 | 34 | 96 | 200 | 6 | 7 | 1 | 91 | 289 | — | 3 | — | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 278 | 189 | 149 | 499 | 299 | 130 | 85 | 150 | 297 | 288 | 250 | 129 | 10 | 106 | 256 | 359 | 270 | 288 | 288 | 233 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 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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