Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 29 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 7PM (local time) - 8ft (2.5m), 7s period, SW swell with 623 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 2.5m 7s and forecast to arrive on Wednesday (Sep 02) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Saturday (Sep 05) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Wed 2nd Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let’s break down what’s on the table for the next couple of weeks.
Honestly, the first ten days or so are a tough stretch. The surf is mostly flat or small, and the wind is constantly blowing the wrong way or just making a mess of things. There’s a long gap of days with nothing worth getting wet for.
The only real window, and I mean the only one, lands on Thursday, September 10th. That morning, a solid SW swell hits hard, running 12ft with an 8-second period. The combined energy is a massive 1915 – that’s a lot of power. That’s big, expert-only surf. The wind is gentle offshore out of the SE, so it should be clean. Thursday afternoon sees the swell even push 13ft (energy of 2188), but the wind goes cross-offshore, which is still okay. The morning session is the one to eye.
Outside of that, it’s a real quiet run. The water is sitting at 63°, which is a touch warmer than usual, so at least it’s not freezing while you’re waiting for something that isn’t happening.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Sat morning. Very mild (max 17°C on Mon night, min 14°C on Mon morning). Winds increasing (light winds from the WSW on Sat night, strong winds from the NW by Mon morning). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Tue night. Very mild (max 18°C on Wed morning, min 14°C on Thu night). Mainly strong winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SW 6 | SSW 6 | SW 9 | SW 8 | SW 8 | SW 8 | SW 9 | SW 8 | SW 7 | SW 5 | SW 5 | SW 5 | SW 6 | SW 7 | SW 7 | WSW 7 | WSW 7 | WSW 5 | WSW 7 | WSW 7 | W 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 39 | 25 | 230 | 153 | 18 | 169 | 193 | 115 | 36 | 37 | 79 | 55 | 287 | 524 | 459 | 237 | 173 | 93 | 569 | 290 | 231 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-off | cross-off | cross-on | on | cross-on | cross | cross | cross | cross-off | cross-off | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross |
High Tide | 10:01PM4.26m | 10:18AM3.93m | 10:34PM4.30m | 10:52AM3.97m | 11:09PM4.25m | 11:28AM3.91m | 11:47PM4.09m | 12:08PM3.76m | 00:30AM3.83m | 12:53PM3.53m | 1:20AM3.49m | 1:48PM3.26m | 2:25AM3.15m | ||||||||
Low Tide | 4:32PM0.27m | 4:59AM0.12m | 5:04PM0.26m | 5:32AM0.17m | 5:38PM0.34m | 6:05AM0.31m | 6:13PM0.48m | 6:41AM0.53m | 6:51PM0.67m | 7:22AM0.79m | 7:39PM0.91m | 8:16AM1.08m | 8:50PM1.14m | ||||||||
 |  |  |  | |  |  |  | | | |  |  | | |  | | | | | | |
 | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:15 | — | — | 8:13 | — | — | 8:10 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 | — | — | 8:00 | — |
mm | 10 | 5 | — | 4 | 2 | 2 | — | — | — | — | — | 4 | 1 | — | — | — | — | — | — | — | 2 |
Temp °C | 16 | 16 | 16 | 16 | 16 | 16 | 14 | 16 | 17 | 16 | 16 | 17 | 18 | 17 | 17 | 16 | 17 | 15 | 15 | 17 | 18 |
Feels °C | 12 | 14 | 15 | 12 | 10 | 14 | 6 | 12 | 13 | 11 | 11 | 11 | 12 | 10 | 11 | 10 | 11 | 8 | 8 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SSW 6 | SW 9 | — | SW 8 | SW 8 | SW 9 | NNW 5 | NNW 5 | — | W 18 | W 16 | — | — | — | SW 14 | SW 14 | — | — | SW 14 | SW 14 |
| kJ | 39 | 25 | 230 | — | 18 | 169 | 193 | 47 | 8 | — | 6 | 5 | — | — | — | 8 | 8 | — | — | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | — | SE 3 | NNW 3 | — | — | — | — | SW 8 | SW 8 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 2 | 2 | — | — | — | — | 115 | 10 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | E 4 | NW 3 | SW 8 | SSW 5 | WSW 8 | NW 6 | NW 5 | SW 7 | SW 5 | SW 5 | SW 5 | SW 6 | SW 7 | SW 7 | WSW 7 | WSW 7 | WSW 5 | WSW 7 | WSW 7 | W 6 |
| kJ | 5 | 6 | 2 | 153 | 94 | 161 | 150 | 38 | 36 | 37 | 79 | 55 | 287 | 524 | 459 | 237 | 173 | 93 | 569 | 290 | 231 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 178 | 145 | 15 | 207 | 181 | 15 | 263 | 15 | 130 | 256 | 256 | 288 | 288 | 456 | 324 | 314 | 499 | 499 | 507 | 15 | 278 |
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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