Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 11 Aug 2026:
- Most powerful swell: Friday 14 Aug, 1AM (local time) - 3.5ft (1.1m), 5s period, SW swell with 62 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 1.1m 5s and forecast to arrive on Friday (Aug 14) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Friday (Aug 14) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Fri 14th Aug) | 3.5ft (1.1m) 5s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what we've got for Whistling Sands (Porth Oer).
Honestly, it’s a pretty tough stretch ahead. The water temp is sitting at about 62°, which is pretty normal for the time of year, so no surprises there. But the surf? For the next ten days or so, it’s a real struggle. We’re looking at a long dry spell from now right through to the morning of Friday the 21st of August. That’s a big gap with pretty much nothing worth getting wet for.
The first real glimpse of something with a bit of punch shows up on Friday the 21st of August. The morning has a 4ft swell from the southwest, with a short 5-second period, but the wind is a light offshore from the south-southwest, keeping things clean. The combined energy is still weak at (75), so it’s not going to be powerful, but at least it’s rideable. The afternoon gets a lot more interesting though. The swell jumps to 6ft, still from the southwest and with that short 6-second period, but the wind is a fresh offshore. This pushes the combined energy into the moderate range at (274). This is the standout window for a surfer who doesn’t mind a bit of a challenge. That 6ft is getting a bit meaty for beginners, but for the average surfer, it’s game on.
Saturday the 22nd of August sees the biggest swell of the whole period. The morning has a 7ft swell from the west, but it’s getting smashed by a strong 22 mph onshore wind from the north-northwest. The combined energy is strong at (353), but that wind will make it a messy, blown-out mess. The afternoon is even bigger, with 8ft from the west-northwest, but the wind switches to a cross-onshore, and the energy hits (610). This is big, powerful, and messy – strictly for experts only, and even then, it’s going to be a battle. Honestly, with that much wind and power, this setup looks more interesting for kite surfing than a paddle session.
After that, it drops off fast. Sunday the 23rd of August has a 6ft swell in the afternoon from the north-northwest with light onshore wind, but the energy is moderate (221). It’s a far cry from the day before. Then Monday the 24th of August morning offers a tiny bit of hope with a glassy 3ft from the north-northwest, but the energy is weak (64) and it’s barely breaking.
Overall, if you’re looking to surf, your best bet is the afternoon of Friday the 21st of August. That offshore wind and 6ft southwest swell is the one to aim for. It’s not perfect, but it’s the best of a quiet bunch.
- Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Wed afternoon, min 16°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Sun afternoon. Very mild (max 19°C on Thu night, min 12°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | SSW 6 | SW 6 | SW 11 | SW 12 | WSW 10 | SW 9 | SW 8 | SW 7 | SW 5 | WSW 5 | SW 6 | SW 5 | NW 4 | SW 7 | SW 7 | N 3 | NNW 4 | N 3 | W 7 | W 7 | — |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 1 | 5 | 6 | 10 | 21 | 17 | 9 | 62 | 17 | 15 | 6 | 18 | 8 | 2 | 2 | 6 | 2 | 1 | 1 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | off | off | on | cross-off | cross-off | cross-off | cross-off | on | on | on | on | cross-on | on | cross-on | cross-on | cross | cross | cross-on | cross |
High Tide | 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 | 11:22AM3.91m | 11:40PM4.24m | 12:01PM3.72m | 00:20AM3.91m | |||||||
Low Tide | 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 | 6:03AM0.03m | 6:09PM0.29m | 6:39AM0.30m | 6:44PM0.52m | ||||||||
 | |  |  | | | | | | | |  | | | |  | | | | |  | |
 | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 8:53 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | — | — | — | — |
Temp °C | 20 | 20 | 21 | 22 | 24 | 23 | 20 | 21 | 19 | 16 | 18 | 17 | 16 | 16 | 16 | 14 | 13 | 15 | 18 | 18 | 16 |
Feels °C | 18 | 19 | 21 | 20 | 21 | 22 | 21 | 21 | 18 | 14 | 16 | 14 | 12 | 13 | 14 | 11 | 9 | 12 | 13 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SW 6 | — | SW 10 | WSW 10 | SW 9 | SW 8 | SW 7 | SW 9 | WSW 5 | SW 6 | SW 5 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | — | W 7 | — |
| kJ | 4 | 1 | — | 4 | 10 | 21 | 17 | 8 | 3 | 17 | 15 | 6 | 10 | 8 | 2 | 2 | 2 | 2 | — | 1 | — |
Swell 2 Height (m) Direction Period (s) | — | — | SW 6 | SW 6 | SW 6 | — | — | WSW 10 | — | SW 11 | NW 4 | SW 7 | — | — | NNW 4 | — | — | — | W 7 | — | — |
| kJ | — | — | 1 | 1 | 1 | — | — | 9 | — | 5 | 4 | 2 | — | — | 1 | — | — | — | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 11 | SW 12 | — | — | — | — | — | — | W 11 | W 10 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 5 | 6 | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | — | S 2 | — | — | WSW 3 | SW 3 | SW 5 | NW 4 | — | NW 3 | NW 4 | NW 4 | — | N 3 | NNW 4 | N 3 | — | — | — |
| kJ | 1 | — | — | 1 | — | — | 1 | 3 | 62 | 9 | — | 3 | 18 | 8 | — | 2 | 6 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 307 | 324 | 113 | 112 | 132 | 132 | 130 | 306 | 145 | 145 | 297 | 113 | 132 | 308 | 298 | 292 | 321 | 311 | 298 | 308 | 218 |
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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