
Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 12 Sep, 1PM (local time) - 7.5ft (2.3m), 7s period, SW swell with 494 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 7s and forecast to arrive on Saturday (Sep 12) at 1PM. 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 Tuesday (Sep 15) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Sat 12th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Right off the bat, I’ve got to be straight with you: if you’re looking for a clean, rideable wave at Whistling Sands (Porth Oer) over this stretch, you’re going to be left wanting. This spot is sheltered and inconsistent at the best of times, and this forecast is a long, flat, and bumpy road. The water temp is about average for this time of year, which is something, I guess.
The run starts on Saturday the 12th with a bit of a push—7ft of messy, short-period swell from the southwest—but it’s getting hammered by a strong cross-shore wind. The wave energy is moderate (411), but it’s all chop and no shape. Forget it. That kind of energy gets cancelled out by the wind. Sunday the 13th drops right off to under 3ft, and it’s still not clean. Monday the 14th has a small, clean window with a light cross-offshore breeze, but the swell is a weak 4ft with a short period, and the energy is weak (87). It’s nothing to get excited about.
We’ve got a real dead stretch from the 15th through the 18th. There’s surf on the charts, but it’s tiny, weak, and mostly blown out. The 16th sees a little bump from the NNW, but it’s still under 5ft and the wind is all over it. By the 18th, it’s down to ankle-biters with almost no energy (26 and 13). This is a proper lull.
Then, on Saturday the 19th, we see a pulse of bigger swell—8ft from the southwest with moderate energy (490)—but the wind is a fresh cross-shore, and it’s lumpy as all hell. The period is only 7 seconds, so it’s going to be a mess. The afternoon cleans up a touch with a cross-offshore, but the size and short period still make it a grovel at best. This is the biggest surf of the window, but it’s not the best.
The week after that is a write-off. From the 20th through the 25th, it’s mostly tiny, onshore, and weak. There’s a moment on Wednesday the 23rd afternoon where it goes glassy with a tiny 3ft swell, but the energy is a paltry 21 and the period is a dismal 4 seconds. It’s barely a ripple. The 25th has a clean offshore breeze, but the swell is down to 1ft. There’s nothing to ride.
We get one last pulse on the 27th—a 6ft west swell with moderate energy (177)—but the period is short (6 seconds), and the wind is a fresh cross-shore making it lumpy. It’s still poor.
Honestly, there is not a single standout session in this entire 16-day window. The only real size day on the 19th is ruined by the wind. It’s just a long, flat, and bumpy run for this inconsistent little beach. The water’s average, the wind’s mostly wrong, and the swell is either too small, too short-period, or too wind-blown to do anything with. If you’ve got a kite, save your energy for the days with the strong cross-shore winds, because for a paddle surfer, this is a no-go. It tends not to stay this bad forever, but this stretch is a long one.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Sat morning. Very mild (max 19°C on Sun night, min 14°C on Fri night). Winds decreasing (strong winds from the SSW on Fri night, calm by Sun morning). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Very mild (max 17°C on Mon night, min 12°C on Tue night). Winds decreasing (strong winds from the SSW on Mon night, light winds from the WNW by Tue afternoon). | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 7 | SW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 5 | SW 5 | W 12 | SW 6 | SW 6 | NNW 5 | NNW 6 | NNW 6 | WSW 4 | SW 5 | SW 6 | WNW 5 | W 4 | WSW 4 | SW 5 |
Wave Graph | |||||||||||||||||||||
411 | 410 | 149 | 49 | 26 | 31 | 87 | 0 | 3 | 56 | 26 | 68 | 119 | 58 | 21 | 41 | 37 | 40 | 22 | 10 | 74 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | cross-on | cross | on | on | cross-on | cross-on | cross | cross |
High Tide | 9:39AM4.09m | 9:55PM4.48m | 10:15AM4.11m | 10:32PM4.37m | 10:51AM4.02m | 11:09PM4.13m | 11:26AM3.85m | 11:45PM3.81m | 12:01PM3.59m | 00:22AM3.44m | 12:37PM3.29m | 1:02AM3.07m | 1:20PM2.97m | 1:52AM2.71m | |||||||
Low Tide | 4:21AM-0.15m | 4:29PM0.06m | 4:55AM-0.05m | 5:03PM0.13m | 5:27AM0.15m | 5:36PM0.29m | 5:57AM0.42m | 6:07PM0.51m | 6:26AM0.72m | 6:39PM0.77m | 6:56AM1.02m | 7:16PM1.06m | 7:33AM1.31m | 8:07PM1.34m | |||||||
6:46 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | |
— | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:32 | — | — | 7:30 | — | — | 7:28 | — | |
mm | 6 | — | — | — | — | — | — | 3 | 2 | — | — | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 16 | 17 | 17 | 16 | 17 | 19 | 18 | 18 | 17 | 15 | 16 | 15 | 13 | 16 | 15 | 14 | 15 | 15 | 13 | 15 | 15 |
Feels °C | 8 | 12 | 15 | 16 | 16 | 17 | 16 | 14 | 10 | 11 | 13 | 9 | 7 | 11 | 9 | 7 | 10 | 9 | 9 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | — | — | — | SW 6 | SW 6 | — | — | — | W 12 | SW 6 | SW 6 | SW 6 | SW 7 | SW 6 | NNW 5 | SW 5 | SW 6 | W 13 | — | NW 4 | — |
— | — | — | 49 | 26 | — | — | — | 3 | 56 | 26 | 8 | 11 | 10 | 7 | 41 | 37 | 3 | — | 3 | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | N 3 | W 13 | — | — | — | — | NW 4 | SW 11 | — | — | — | — | — | — | WSW 6 | — | — |
— | — | — | — | 1 | 3 | — | — | — | — | 5 | 5 | — | — | — | — | — | — | 4 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 13 | — | — | — | — | — | W 11 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 7 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | — | — | SW 6 | SW 5 | SW 5 | SW 6 | — | — | NNW 5 | NNW 6 | NNW 6 | WSW 4 | WNW 5 | NW 5 | WNW 5 | W 4 | WSW 4 | SW 5 |
411 | 410 | 149 | — | — | 31 | 87 | 96 | 205 | — | — | 68 | 119 | 58 | 21 | 27 | 28 | 40 | 22 | 10 | 74 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 270 | 359 | 15 | 137 | 137 | 130 | 256 | 256 | 249 | 15 | 338 | 145 | 145 | 130 | 292 | 499 | 498 | 284 | 299 | 292 | 241 |
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.











