Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 20 Jul 2026:
- Most powerful swell: Wednesday 22 Jul, 10AM (local time) - 4.5ft (1.4m), 6s period, N swell with 141 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 1.4m 6s and forecast to arrive on Wednesday (Jul 22) 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 6s period and expected on Wednesday (Jul 22) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Wed 22nd Jul) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this stretch up to the 16-day mark is looking pretty grim. The computer is telling me there’s not a single good wave on offer for the whole 16-day window. We’re looking at a solid blank run, which isn't unheard of for this spot, but it stings.
The only break on the radar is Whistling Sands (Porth Oer). It’s a sheltered, beginner-friendly spot, but it’s inconsistent and the swell just isn’t cooperating. The water temp is sitting around 60°, which is about average for the time of year, so nothing weird there.
The problem is the wind. It’s locked in from the North for the first few days, slapping straight across the bay. You’ll see tiny waves, maybe 2 ft to 3 ft, with a short, weak period (4 to 5 seconds). The wave energy is barely there (10 to 30), and the conditions are just choppy and cross-onshore. It’s a write-off.
We get a little bump mid-week on the 22nd of July, but it’s not a good one. We see 5 ft of swell from the North, but it’s accompanied by a 19 mph cross-on wind. The energy hits 141, which is moderate, but the wind is going to turn it into a lumpy mess. That’s more of a kite session than a paddle session.
The rest of the run is a repeat of the same story: small, weak, and messy. There are a few moments of glassy or clean conditions, like on the morning of the 30th of July when the wind drops to glassy, but the swell is only 4 ft from the WNW with a short 5-second period. The energy is still low (56). It might look pretty, but there’s no push.
Honestly, it’s a tough outlook. The pattern is stuck, and the best advice is to give the board a rest and check back in a few days because forecasts can always change.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Wed afternoon, min 11°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat morning. Very mild (max 19°C on Thu afternoon, min 14°C on Thu morning). Winds increasing (light winds from the W on Thu night, fresh winds from the NW by Sat night). | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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) | N 5 | N 4 | N 5 | N 5 | N 4 | N 6 | N 6 | NNW 5 | N 5 | N 5 | N 5 | N 4 | SW 13 | SW 13 | — | W 4 | WSW 4 | WSW 5 | WSW 5 | SW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 14 | 43 | 29 | 30 | 0 | 141 | 87 | 31 | 21 | 12 | 0 | 7 | 7 | 0 | 9 | 34 | 33 | 17 | 12 | 11 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | on | cross | cross-on | on | on | cross-on | on |
High Tide | 1:23PM3.32m | 1:44AM3.57m | 2:14PM3.10m | 2:38AM3.23m | 3:13PM2.92m | 3:43AM2.96m | 4:24PM2.82m | 4:58AM2.82m | 5:36PM2.84m | 6:08AM2.84m | 6:38PM2.97m | 7:05AM2.95m | 7:29PM3.16m | ||||||||
Low Tide | 8:07PM0.85m | 8:45AM0.85m | 8:54PM1.09m | 9:33AM1.12m | 9:52PM1.30m | 10:33AM1.32m | 11:08PM1.41m | 11:50AM1.39m | 00:34AM1.37m | 1:04PM1.32m | 1:40AM1.21m | 1:59PM1.16m | 2:29AM1.01m | ||||||||
 | |  | | |  |  | | | | | | | |  |  |  | | | | | |
 | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — |
 | — | — | 9:30 | — | — | 9:29 | — | — | 9:28 | — | — | 9:27 | — | — | 9:24 | — | — | 9:23 | — | — | 9:22 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — |
Temp °C | 14 | 15 | 16 | 14 | 16 | 15 | 13 | 18 | 17 | 16 | 19 | 19 | 15 | 17 | 18 | 15 | 16 | 17 | 14 | 16 | 17 |
Feels °C | 11 | 10 | 11 | 10 | 12 | 11 | 8 | 13 | 13 | 13 | 17 | 17 | 14 | 16 | 16 | 11 | 14 | 16 | 10 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | — | — | — | W 7 | — | — | — | — | — | W 14 | W 14 | N 4 | SW 13 | NW 3 | — | SW 12 | SW 12 | WSW 5 | WSW 5 | SW 5 | SW 6 |
| kJ | — | — | — | 1 | — | — | — | — | — | 4 | 4 | 1 | 7 | 2 | — | 6 | 5 | 33 | 17 | 12 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | SW 13 | — | — | — | S 11 | S 11 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 7 | — | — | — | 2 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 5 | N 4 | N 5 | N 5 | N 4 | N 6 | N 6 | NNW 5 | N 5 | N 5 | N 5 | — | NW 3 | — | — | W 4 | WSW 4 | — | NW 3 | NW 4 | NNW 4 |
| kJ | 10 | 14 | 43 | 29 | 30 | 94 | 141 | 87 | 31 | 21 | 12 | — | 1 | — | — | 9 | 34 | — | 2 | 7 | 11 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 313 | 921 | 325 | 218 | 308 | 85 | 310 | 314 | 252 | 257 | 610 | 288 | 397 | 1035 | 292 | 359 | 621 | 132 | 427 | 129 | 132 |
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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