
Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 10 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 1PM (local time) - 3ft (0.9m), 5s period, NNW swell with 42 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 0.9m 5s and forecast to arrive on Saturday (Aug 15) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Sunday (Aug 16) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Sat 15th Aug) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright, let’s get into it. I’m looking at the next couple of weeks here and, honestly, it’s a pretty grim stretch for us at Whistling Sands (Porth Oer). This spot is a sheltered little cove, and it needs a good SW swell to light up, but we just aren’t seeing it. The whole 16-day run is filled with poor surf conditions, so there are no standout days to get excited about. We’re looking at a long blank run of flat to tiny, messy waves.
Let’s start from the beginning. Sunday the 9th of August has some clouds and a cross-off wind from the SSW at 16 mph, but the swell is a pathetic 0.3 ft from the SW. The wave energy is weak at (12), and it’s just not worth paddling out for. The water temp is 62°, which is about average for this time of year—nothing unusual there.
Monday the 10th is a write-off too, with a tiny 1 ft swell and a short 6-second period, chopped up by cross-onshore winds. Tuesday the 11th gives us a clean morning with an offshore breeze from the SE at 9 mph, but the swell is only 0.7 ft and weak. That glassy look is tempting, but you’d be sitting out there on a sea of nothing.
Through the rest of the first week and into the second, it’s the same story. We see a slight bump on Saturday the 15th with a 3 ft swell from the NNW, but it’s short-period (5 seconds) and the wind is a fresh 19 mph cross-onshore, making it lumpy and choppy. The combined energy only reaches (47) and (40) for the morning and afternoon—still weak. Not worth the hassle.
Moving into the third week, Tuesday the 18th of August shows a tiny bit of promise with a 4 ft swell from the NW in the morning, but it’s a weak 5-second period and cross-shore wind. The energy is (66). Still not good. By Wednesday the 19th afternoon, we get the biggest swell of the whole run: 4 ft from the NNW with a 6-second period, and the combined energy finally hits moderate territory at (118). But the wind is a light cross-onshore, and it’s still tagged as poor surf conditions. That’s about as good as it gets, and it’s not saying much.
The rest of the forecast is more of the same: small, short-period swells with onshore or cross-onshore winds. Thursday the 21st of August morning is clean with a light offshore ESE wind at 6 mph and a 4 ft swell from the WNW (energy 85), but the period is only 5 seconds—choppy and weak. Saturday the 23rd of August morning goes glassy with a tiny 0.3 ft swell from the SW, but it’s got a long 14-second period. That’s a very long period for a beach break like this, meaning the waves will likely break too straight and be hard to ride here.
In short, there’s nothing to recommend. The whole 16-day window is a flat spell. For this area, a blank run like this isn’t unusual, but it’s still a bummer. Forecasts can change, but as it stands, leave the board in the van.
Stay patient,
Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Tue night, min 14°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Wed afternoon, min 13°C on Sat morning). Winds increasing (light winds from the WNW on Wed afternoon, fresh winds from the N by Sat morning). | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 3 | SW 4 | SW 6 | SW 6 | SW 6 | SSW 6 | SW 6 | SW 11 | SW 12 | WSW 10 | WSW 9 | SW 8 | SW 7 | SW 5 | SW 4 | NW 4 | SW 7 | NNW 5 | NNW 5 | N 4 |
Wave Graph | ||||||||||||||||||||
6 | 12 | 11 | 5 | 6 | 4 | 1 | 5 | 6 | 9 | 16 | 17 | 14 | 22 | 7 | 8 | 8 | 35 | 42 | 16 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-on | cross-off | off | cross-on | cross-off | off | cross-on | cross-off | cross-off | on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:06PM3.28m | 6:42AM3.33m | 7:10PM3.62m | 7:42AM3.57m | 8:04PM3.98m | 8:33AM3.80m | 8:52PM4.29m | 9:19AM3.95m | 9:37PM4.49m | 10:02AM4.03m | 10:19PM4.55m | 10:42AM4.01m | 11:00PM4.46m | |||||||
Low Tide | 1:25AM0.83m | 1:53PM0.78m | 2:27AM0.46m | 2:46PM0.49m | 3:18AM0.13m | 3:32PM0.26m | 4:04AM-0.10m | 4:15PM0.11m | 4:46AM-0.19m | 4:54PM0.07m | 5:26AM-0.15m | 5:32PM0.14m | ||||||||
— | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | |
8:58 | — | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 14 | 16 | 16 | 20 | 20 | 21 | 21 | 23 | 23 | 22 | 22 | 22 | 16 | 19 | 17 | 14 | 14 | 15 |
Feels °C | 14 | 15 | 11 | 12 | 12 | 18 | 18 | 20 | 18 | 20 | 21 | 23 | 22 | 23 | 13 | 17 | 13 | 9 | 8 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 4 | SW 6 | SW 6 | SW 6 | SSW 6 | SW 6 | — | SW 10 | WSW 10 | WSW 9 | SW 8 | SW 7 | SW 8 | SW 4 | SW 5 | SW 7 | WSW 5 | WSW 7 | SW 7 |
6 | 12 | 11 | 5 | 6 | 4 | 1 | — | 4 | 9 | 16 | 17 | 14 | 2 | 7 | 4 | 8 | 3 | 5 | 2 | |
Swell 2 Height (m) Direction Period (s) | — | S 10 | — | S 11 | — | — | — | SW 6 | SW 6 | — | SW 6 | — | SW 10 | W 9 | WSW 7 | SW 7 | W 11 | SW 8 | — | — |
— | 2 | — | 2 | — | — | — | 1 | 1 | — | 1 | — | 4 | 2 | 5 | 2 | 2 | 2 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 11 | SW 12 | SW 6 | — | — | — | — | SW 11 | W 11 | — | — | — | — |
— | — | — | — | — | — | — | 5 | 6 | 1 | — | — | — | — | 5 | 2 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 3 | N 2 | N 3 | NNW 3 | NE 3 | SE 3 | — | — | S 3 | W 6 | — | — | — | SW 5 | NW 3 | NW 4 | N 2 | NNW 5 | NNW 5 | N 4 |
6 | 2 | 3 | 3 | 2 | 1 | — | — | 1 | 3 | — | — | — | 22 | 3 | 8 | 1 | 35 | 42 | 16 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 498 | 292 | 292 | 298 | 257 | 307 | 314 | 134 | 112 | 139 | 129 | 132 | 284 | 145 | 145 | 297 | 145 | 311 | 555 | 311 |
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.











