Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 31 Aug 2026:
- Most powerful swell: Thursday 3 Sep, 1AM (local time) - 6ft (1.8m), 7s period, SW swell with 290 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 1.8m 7s and forecast to arrive on Thursday (Sep 03) 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 1.7m 6s period and expected on Wednesday (Sep 02) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 3rd Sep) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer.
Honestly, mate, the outlook for the next couple of weeks is a bit of a poor show. That sheltered little cove at Whistling Sands (Porth Oer) is inconsistent at the best of times, and this stretch is looking bleak. There’s a long gap of nothing really worth jumping for. The first recommendation doesn't come along until late in the period. The water here is sitting at 63°F, which is a touch warmer than usual for this time of year, about average all things considered.
We’re looking at a blank run for most of the first week. It’s a proper flat spell, with hardly any energy (combined energy often well under 100) and messy, choppy winds ruining the small, short-period slop that does show up. The only thing that changes is the wind direction, blowing from the WNW and W mostly, onshore or cross-onshore, churning things up. It’s not worth a paddle for ages.
Now, hold on. Things get interesting from Wednesday 9th September onwards. The buildings start. It’s still not great surf but check out Wednesday afternoon of the 9th. We see a jump in swell height to 6ft later in the morning and the combined energy hits 249 (moderate). The wind then swings cross-off from the SSW, cleaning it right up. It’s still a short-period, SW windswell at 6ft, so it’ll be a bit lumpy but the cleaning up makes it rideable. The real standout comes on the 13th and 14th September. The combined energy on Monday morning the 14th is 842 (strong) with an 8ft SW swell and a short 8-second period, but it’s firing under cross-off winds. The afternoon pushes up to 10ft, with energy at 1086 (very strong). That is serious power. However, at over 8ft, that’s for experts only, and the 8-second period will see it coming in very dumpy, not offering much shape. For the keen, Sunday morning 13th September might be the sweet spot: a 5ft SW swell (187 energy), clean and lined up under cross-off winds. That is the only one to get on the board around this period, albeit a big effort for a small window.
So overall, a long quiet spell, then a brief, punchy but very raw swell at the end. Not the best surf on offer for the area, but if you’re desperate and an expert, the 14th has the size, just don’t expect any grace to it. The light wind periods will also help, but the consistency is just not there. This kind of blank run is a bit more normal for a super-sheltered spot like this. The bigger days look more interesting for a kite surfer than a traditional paddle surfer, with that raw power and clean but short-period windswell.
— Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Very mild (max 19°C on Wed night, min 15°C on Mon morning). Winds increasing (light winds from the W on Mon afternoon, strong winds from the S by Wed morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Thu night. Very mild (max 17°C on Thu morning, min 14°C on Fri night). Winds decreasing (fresh winds from the SW on Thu morning, light winds from the W by Sat morning). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 8 | SW 9 | SW 8 | SW 4 | W 18 | SW 5 | SW 16 | SW 6 | SW 7 | SW 6 | SW 6 | WSW 6 | WSW 6 | SW 5 | W 5 | W 5 | SW 5 | SW 13 | SW 13 | SW 4 | SSW 5 |
Wave Graph | |||||||||||||||||||||
153 | 152 | 46 | 22 | 6 | 36 | 10 | 239 | 290 | 116 | 149 | 137 | 134 | 67 | 60 | 47 | 14 | 7 | 7 | 6 | 17 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 3:02PM3.03m | 3:52AM2.93m | 4:36PM3.02m | ||||||||
Low Tide | 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 | 9:38AM1.30m | 10:31PM1.24m | 11:19AM1.31m | 00:09AM1.06m | ||||||||
6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | |
— | 8:10 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | |
mm | — | — | — | — | — | 4 | 3 | — | — | — | 1 | 8 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 17 | 16 | 16 | 16 | 16 | 17 | 19 | 17 | 17 | 15 | 15 | 17 | 16 | 14 | 15 | 15 | 17 | 18 | 17 |
Feels °C | 9 | 15 | 14 | 12 | 11 | 13 | 12 | 12 | 16 | 14 | 13 | 13 | 9 | 11 | 10 | 12 | 11 | 11 | 12 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 9 | SW 8 | N 4 | — | SW 5 | SW 16 | SW 16 | — | SW 14 | — | SW 14 | SW 14 | NW 4 | SW 14 | SW 14 | SW 5 | WSW 6 | SW 13 | SW 4 | SSW 5 |
153 | 152 | 46 | 1 | — | 36 | 10 | 10 | — | 8 | — | 8 | 8 | 13 | 8 | 7 | 14 | 3 | 7 | 6 | 17 | |
Swell 2 Height (m) Direction Period (s) | — | NNW 5 | — | — | W 18 | W 16 | — | — | — | — | — | — | — | SW 14 | — | SW 14 | NW 4 | — | SW 6 | SW 13 | SW 12 |
— | 33 | — | — | 6 | 5 | — | — | — | — | — | — | — | 8 | — | 7 | 9 | — | 2 | 6 | 6 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | SW 13 | W 8 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | 1 | — | |
Wind waves Height (m) Direction Period (s) | NW 5 | — | NW 4 | SW 4 | SW 5 | — | SW 4 | SW 6 | SW 7 | SW 6 | SW 6 | WSW 6 | WSW 6 | SW 5 | W 5 | W 5 | — | SSW 3 | SSW 4 | SSE 2 | SE 3 |
96 | — | 4 | 22 | 68 | — | 44 | 239 | 290 | 116 | 149 | 137 | 134 | 67 | 60 | 47 | — | 3 | 8 | 1 | 7 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 499 | 15 | 15 | 241 | 297 | 233 | 298 | 325 | 256 | 323 | 326 | 15 | 270 | 498 | 130 | 133 | 256 | 141 | 141 | 309 | 282 |
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.











