Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 27 Aug, 1AM (local time) - 4ft (1.2m), 7s period, SW swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 10PM (local time) - 5ft (1.5m), 6s period, SW swell with 183 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 1AM (local time) - 4ft (1.2m), 7s period with SW swell.
Best Forecast Surf Conditions for Whistling Sands (Porth Oer) this week:
The surf forecast for Whistling Sands (Porth Oer) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 27) at 1AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.1m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Whistling Sands (Porth Oer) in the next 16 days are 1.5m 6s and forecast to arrive on Wednesday (Aug 26) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Aug 26) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 27th Aug) | 4ft (1.2m) 7s |
| Best Surf | 1AM (Thu 27th Aug) | 4ft (1.2m) 7s |
| Most Powerful | 10PM (Wed 26th Aug) | 5ft (1.5m) 6s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Alright, folks, Rusty here. I'm gonna level with you: the next couple of weeks are looking pretty bleak for a surf. We've got a long, dry stretch ahead before anything even looks like a wave.
Looking at the whole picture, we're in for a proper flat spell. For the first ten days, from Thursday the 20th of August right through to Saturday the 29th, it's essentially a washout. The swell is tiny, the wind is all over the place, and the wave energy is weak. We're talking combined energy figures mostly in the double digits, like 10 (weak) and 37 (weak). The only break on the menu is Whistling Sands (Porth Oer), and it's an inconsistent, sheltered beginner spot. It's just not going to happen. The water temp is about average for the time of year, nothing special.
Now, we do have a glimmer of hope right at the tail end of the forecast. On Sunday the 30th of August, things start to shift. The morning session sees a pulse of 6ft swell from the SW, with a moderate offshore breeze from the SSE. The energy finally jumps up to a moderate 239. It's surfable, but the conditions are described as "very ordinary", so don't get your hopes up too high.
The real standout, the only one worth circling on the calendar, is the afternoon of Sunday the 30th of August at Whistling Sands. The swell bumps up to 8ft from the SW, with a period of 7 seconds. The wind is a clean cross-offshore from the SSE. The combined energy is a solid 571 (moderate). Now, that 8ft is getting into the territory where it's not for beginners, but for anyone with a bit of experience, that clean, cross-off wind will make for some proper lined-up walls. It's an inconsistent spot, so when it does come alive like this, it's a real treat. Just be aware, crowds are possible there.
After that, Monday the 31st holds similar size, around 8ft to 8ft from the WSW, but the wind and reports are a bit more "marginal", so Sunday afternoon is the clear winner.
The rest of the run into September fades back into small, choppy nothingness. So, if you're keen, you've got a long wait, but that Sunday the 30th might just be worth the patience.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Wed night. Very mild (max 17°C on Wed night, min 13°C on Thu night). Winds decreasing (fresh winds from the N on Thu afternoon, light winds from the N by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Warm (max 23°C on Mon afternoon, min 14°C on Sat night). Winds increasing (light winds from the NNE on Sat night, strong winds from the E by Mon night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 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) | SW 7 | N 6 | N 5 | NNW 5 | NNW 5 | N 4 | N 5 | N 5 | SW 15 | SW 14 | SW 13 | WSW 10 | SW 9 | SW 13 | SW 13 | SW 13 | SW 13 | SW 9 | SW 12 | SSW 5 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 52 | 119 | 88 | 59 | 24 | 33 | 18 | 13 | 8 | 8 | 7 | 10 | 13 | 7 | 7 | 7 | 7 | 13 | 6 | 0 | 139 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | off | off | off | off | off |
High Tide | 2:11PM2.93m | 2:45AM2.80m | 3:22PM2.70m | 4:14AM2.59m | 5:01PM2.65m | 5:49AM2.62m | 6:22PM2.82m | 6:54AM2.80m | 7:16PM3.08m | 7:39AM3.02m | 7:55PM3.37m | 8:14AM3.26m | 8:28PM3.66m | ||||||||
Low Tide | 8:27AM1.25m | 8:50PM1.34m | 9:23AM1.49m | 10:11PM1.52m | 10:58AM1.60m | 00:02AM1.51m | 12:37PM1.49m | 1:19AM1.30m | 1:36PM1.24m | 2:08AM1.03m | 2:17PM0.97m | 2:46AM0.75m | 2:53PM0.72m | 3:20AM0.50m | |||||||
 |  |  | |  |  | | | | | | | | | |  |  |  | | |  | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:23 | — | — | 8:22 | — |
mm | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | 1 | 13 |
Temp °C | 15 | 15 | 15 | 14 | 15 | 15 | 13 | 15 | 15 | 15 | 16 | 16 | 20 | 23 | 20 | 20 | 18 | 17 | 20 | 21 | 19 |
Feels °C | 9 | 8 | 10 | 10 | 13 | 9 | 9 | 12 | 12 | 12 | 12 | 12 | 17 | 18 | 12 | 15 | 14 | 13 | 18 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 13 | SW 15 | SW 15 | NNW 5 | N 4 | SW 13 | WSW 10 | SW 9 | SW 9 | SW 9 | SW 8 | SW 8 | SW 9 | SW 12 | — | — |
| kJ | 52 | 21 | 6 | 4 | 1 | 7 | 8 | 8 | 4 | 1 | 7 | 10 | 13 | 3 | 3 | 3 | 3 | 13 | 6 | — | — |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 6 | W 6 | SW 12 | SW 15 | SW 14 | W 9 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 11 | NNE 3 | — | — | W 12 |
| kJ | 8 | 8 | 8 | 7 | 7 | 1 | 1 | 6 | 8 | 8 | 2 | 8 | 8 | 7 | 7 | 7 | 5 | 1 | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 14 | W 16 | SW 16 | W 10 | W 10 | SW 12 | W 9 | — | SW 14 | — | — | — | — | SW 13 | SW 8 | — | — | — |
| kJ | — | — | — | 4 | 5 | 10 | 2 | 2 | 6 | 2 | — | 8 | — | — | — | — | 7 | 2 | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 5 | N 6 | N 5 | NNW 5 | NNW 5 | N 4 | N 5 | N 5 | — | — | N 4 | NNE 3 | ESE 3 | ESE 3 | ESE 4 | ESE 4 | ENE 3 | SE 4 | SSW 4 | SSW 5 | SW 7 |
| kJ | 49 | 119 | 88 | 59 | 24 | 33 | 18 | 13 | — | — | 1 | 1 | 2 | 1 | 22 | 13 | 5 | 17 | 37 | 59 | 139 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 325 | 467 | 145 | 145 | 297 | 134 | 129 | 252 | 113 | 134 | 284 | 113 | 288 | 113 | 301 | 364 | 282 | 258 | 298 | 296 | 106 |
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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