Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 24 Aug 2026:
- Most powerful swell: Monday 31 Aug, 10AM (local time) - 4.5ft (1.3m), 11s period, SW swell with 361 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 1.3m 11s and forecast to arrive on Monday (Aug 31) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Aug 30) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Mon 31st Aug) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's talk about this stretch of coast.
I'm not gonna sugarcoat it: this is a grim outlook. For Whistling Sands (Porth Oer), the entire sixteen-day window is mostly a letdown. This spot is inconsistent as they come, and for the first few days, it's essentially flat. There's a long gap with nothing at all worth paddling out for. The water is about 62°F, which is standard for this time of year, so no surprises there.
You're looking at a long run of tiny, weak swell with poor winds. The first real sign of life shows up on Friday, August 28th, with a 4ft SW swell, period around 8 seconds, and a moderate combined energy of 131. But the cross-onshore wind spoils it with chop and lumps.
Sunday the 30th of August afternoon brings more energy—a 6ft SW swell and a combined energy of 253—but the wind is a strong breeze, making it clean but messy and hard to surf.
The only thing that might get a second glance is Monday morning, August 31st. There's a 4ft SW groundswell with an 11-second period and a strong combined energy of 648, but the wind is cross-on. That longer period means better shape, but at a sheltered, inconsistent beach break like this, a long-period SW swell can be a handful, often breaking too straight.
Then on September 6th, the ocean loses its mind. Sunday afternoon shows a 15ft SW swell with a 9-second period and a massive combined energy of 2952. That is serious, dangerous power for experts only. The wind is cross-shore, the report calls it marginal, and with that much juice and a side wind, you'd be better off with a kite than a paddle. It's a kite-surfing show, not a surfing one.
The honest truth? There's nothing to get excited about here. The whole sixteen days is pretty barren. Whistling Sands is finicky, and this forecast proves it. Leave the board at home.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Mon afternoon, min 15°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sat afternoon. Very mild (max 17°C on Thu morning, min 15°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 10 | SW 13 | SW 13 | SW 13 | SW 13 | SW 8 | SW 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SW 8 | SW 8 | SW 7 | NW 5 | WSW 5 | SW 6 | SW 6 | SSW 6 | SW 7 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 14 | 7 | 7 | 7 | 7 | 11 | 17 | 6 | 6 | 5 | 5 | 57 | 131 | 79 | 43 | 17 | 11 | 0 | 71 | 253 | 118 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-off | cross-off | cross | cross-off | off | on | cross | off | cross | cross | cross-on | cross-on | on | cross-off | off | on | cross-off | cross-off | cross |
High Tide | 7:16PM3.08m | 7:39AM3.02m | 7:55PM3.37m | 8:14AM3.26m | 8:28PM3.66m | 8:46AM3.48m | 8:59PM3.92m | 9:16AM3.67m | 9:29PM4.12m | 9:47AM3.83m | 10:01PM4.26m | 10:18AM3.93m | 10:34PM4.30m | ||||||||
Low Tide | 1:36PM1.24m | 2:08AM1.03m | 2:17PM0.97m | 2:46AM0.75m | 2:53PM0.72m | 3:20AM0.50m | 3:26PM0.50m | 3:53AM0.30m | 3:59PM0.35m | 4:26AM0.17m | 4:32PM0.27m | 4:59AM0.12m | 5:04PM0.26m | ||||||||
 | |  |  | | | |  | |  | | | | | | |  |  | |  |  | |
 | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | 8:27 | — | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — | — | 8:13 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 7 | 1 | 1 | 6 | 3 |
Temp °C | 18 | 21 | 20 | 17 | 19 | 20 | 19 | 20 | 20 | 17 | 17 | 17 | 16 | 17 | 17 | 16 | 16 | 16 | 17 | 18 | 16 |
Feels °C | 16 | 17 | 14 | 14 | 15 | 15 | 19 | 20 | 20 | 16 | 16 | 15 | 16 | 15 | 16 | 12 | 14 | 13 | 12 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SE 3 | SW 13 | SW 13 | ESE 3 | SW 8 | SW 8 | SSW 8 | SSW 7 | — | SSW 7 | SW 8 | — | SW 7 | SW 7 | NW 5 | SW 6 | N 4 | — | — | SW 7 |
| kJ | 14 | 1 | 7 | 7 | 2 | 11 | 17 | 6 | 5 | — | 5 | 57 | — | 79 | 21 | 28 | 11 | 2 | — | — | 118 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 9 | — | SW 8 | SW 8 | SW 13 | — | — | N 4 | SSW 7 | — | — | — | SW 5 | SW 11 | SW 6 | NNW 5 | — | — | — | — |
| kJ | 8 | 3 | — | 3 | 3 | 7 | — | — | 2 | 5 | — | — | — | 11 | 5 | 6 | 9 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | SW 13 | SW 9 | SE 4 | SW 13 | — | SW 12 | SW 12 | SW 12 | SSW 3 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 7 | 3 | 1 | 7 | — | 6 | 6 | 6 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | ESE 4 | E 3 | — | ENE 4 | ESE 4 | — | — | — | — | SW 3 | SW 8 | NW 4 | NW 5 | WSW 5 | — | SW 6 | SSW 6 | SW 7 | — |
| kJ | 5 | — | 19 | 6 | — | 13 | 5 | — | — | — | — | 5 | 131 | 52 | 43 | 17 | — | 39 | 71 | 253 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 288 | 291 | 262 | 257 | 218 | 141 | 266 | 218 | 298 | 256 | 132 | 15 | 15 | 189 | 147 | 139 | 295 | 323 | 296 | 298 | 288 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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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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