Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 25 Jul 2026:
- Most powerful swell: Friday 31 Jul, 7PM (local time) - 7ft (2.1m), 7s period, SSW swell with 392 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 2.1m 7s and forecast to arrive on Friday (Jul 31) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Friday (Jul 31) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Fri 31st Jul) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s be straight with you about Whistling Sands (Porth Oer). This stretch is a sheltered, beginner-friendly spot, but it’s inconsistent, and when it does get a pulse, the surrounding conditions rarely do it any favours. Right now, most of the 16-day window looks like a write-off.
We start off with a grim run. From Saturday the 25th right through to the afternoon of Friday the 31st of July, it’s a total no-go. We’re talking weak windswell, mostly cross-onshore or messy winds, and energy readings barely hitting double digits. The combined energy (15) on Saturday morning tells the story – poor surf. That’s a full week of flat or junk.
The first flash of something comes on the morning of Saturday the 1st of August. The swell pops to 3ft from the SW, with a period of 9 seconds – that’s a bit of groundswell, which is promising. The wind goes light offshore from the east, so the surface will be clean. The combined energy jumps to 145 (moderate). It’s surfable, but the wave comment calls it “very ordinary conditions.” For this inconsistent spot, that’s the best we get. The crowds are labelled “sometimes,” so you might have a few locals out. This is your one stand-out session.
After that brief glimmer, it dies back down. Sunday the 2nd of August drops to a weak 1ft, and the rest of the first week of August is a mix of tiny swell and onshore wind. Then, on Wednesday the 5th of August, a big pulse arrives: 8ft from the SW with a period of 8 seconds. The combined energy hits 903 (strong) in the morning and 1042 (very strong) in the afternoon. That’s a lot of water moving, but the wind is cross-onshore at 16 mph, so it will be choppy and unruly. For a sheltered, beginner spot, this is expert territory at best – and messy with it. For a beach setup, that raw power with onshore wind would be more interesting for kite surfing than paddling in.
So, to sum it up: one early-August morning worth setting an alarm for, then a whole lot of waiting. It doesn’t stay poor forever, and forecasts can change.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Mon afternoon, min 14°C on Sun night). Winds increasing (light winds from the WNW on Fri night, fresh winds from the WNW by Sun morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon night, min 15°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
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) | W 4 | WSW 5 | SW 5 | SW 5 | NW 5 | NW 5 | SW 6 | SW 4 | SW 5 | SW 5 | SW 5 | SW 4 | WSW 3 | — | WSW 3 | SW 4 | SW 4 | SW 4 | S 4 | SW 12 | SW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 9 | 44 | 60 | 42 | 47 | 23 | 7 | 11 | 30 | 0 | 10 | 4 | 1 | 0 | 1 | 5 | 3 | 5 | 0 | 5 | 205 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | on | on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | on | cross-on | on | cross-on | cross-on | cross-on | cross |
High Tide | 6:08AM2.84m | 6:38PM2.97m | 7:05AM2.95m | 7:29PM3.16m | 7:52AM3.10m | 8:12PM3.37m | 8:32AM3.26m | 8:49PM3.59m | 9:07AM3.41m | 9:24PM3.79m | 9:40AM3.52m | 9:56PM3.95m | 10:12AM3.60m | 10:28PM4.05m | |||||||
Low Tide | 1:04PM1.32m | 1:40AM1.21m | 1:59PM1.16m | 2:29AM1.01m | 2:42PM0.97m | 3:09AM0.80m | 3:19PM0.77m | 3:46AM0.61m | 3:53PM0.60m | 4:21AM0.46m | 4:26PM0.49m | 4:56AM0.36m | 5:00PM0.43m | ||||||||
 | |  | | |  |  | |  | | | | | | | | | | | | | |
 | 5:24 | — | — | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — |
 | — | — | 9:23 | — | — | 9:22 | — | — | 9:21 | — | — | 9:19 | — | — | 9:17 | — | — | 9:15 | — | — | 9:14 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 17 | 16 | 17 | 17 | 14 | 18 | 20 | 18 | 19 | 18 | 18 | 19 | 18 | 15 | 17 | 18 | 19 | 21 | 18 |
Feels °C | 11 | 16 | 15 | 10 | 11 | 13 | 11 | 16 | 19 | 16 | 17 | 17 | 18 | 17 | 16 | 13 | 14 | 15 | 15 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 12 | NW 5 | S 11 | SW 5 | SW 6 | SW 6 | NNW 5 | NNW 4 | — | — | — | WSW 4 | WSW 3 | — | WSW 3 | SW 4 | — | WSW 4 | — | SW 12 | SW 8 |
| kJ | 6 | 1 | 3 | 42 | 32 | 15 | 15 | 4 | — | — | — | 3 | 1 | — | 1 | 5 | — | 3 | — | 5 | 205 |
Swell 2 Height (m) Direction Period (s) | — | SW 12 | — | — | — | — | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 6 | — | — | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | WSW 5 | SW 5 | NW 4 | NW 5 | NW 5 | WSW 4 | SW 4 | SW 5 | SW 5 | SW 5 | SW 4 | — | — | — | — | SW 4 | SW 4 | S 4 | SSW 5 | NW 4 |
| kJ | 9 | 44 | 60 | 24 | 47 | 23 | 7 | 11 | 30 | 29 | 10 | 4 | — | — | — | — | 3 | 5 | 13 | 117 | 25 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 359 | 359 | 292 | 615 | 499 | 145 | 145 | 270 | 221 | 258 | 252 | 257 | 291 | 295 | 308 | 318 | 318 | 308 | 134 | 8 | 4 |
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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