Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 12 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 7AM (local time) - 4.5ft (1.3m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 1AM (local time) - 5ft (1.6m), 7s period, WSW swell with 216 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 7AM (local time) - 4.5ft (1.3m), 6s 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 Tuesday (Aug 18) at 7AM. The primary swell is predicted to be 1.3m and 6s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Whistling Sands (Porth Oer) in the next 16 days are 1.6m 7s and forecast to arrive on Wednesday (Aug 19) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Aug 12) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 18th Aug) | 4.5ft (1.3m) 6s |
| Best Surf | 7AM (Tue 18th Aug) | 4.5ft (1.3m) 6s |
| Most Powerful | 1AM (Wed 19th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Right then, folks, Rusty here. Let's have a look at what's on the cards for the next couple of weeks.
Honestly, it's a bit of a grim picture for Whistling Sands (Porth Oer). The whole 16-day window is a bit of a write-off for a proper paddle. There's nothing that comes close to a decent surf session, and the forecast is a long, flat run of "poor surf conditions" with no real standouts. The combined swell energy is weak, barely cracking double digits for most of it, and even when it does get a bit of a pulse, the wind is all wrong.
The first proper bump in the energy comes around Tuesday the 18th, with a moderate combined energy of 146, but that's a 5 ft swell from the SW with a short period of 6 seconds. The wind might be clean, but it's a fresh breeze onshore, which will make it messy. Wednesday the 19th is similar, with a strong breeze making it a complete mess. It's not going to be any fun on a surfboard, and with that strong wind and a beach setup, the bay is going to be more interesting for the kite surfers than for us.
The only notable thing is the glassy conditions on the morning of Saturday the 22nd and Tuesday the 25th, but the swell is tiny at 0.3 ft and 3 ft respectively, with very weak energy. It's a flat calm, but flat is flat. The water temperature is about average for the time of year, so that's not a bonus either.
There's nothing here to get excited about. It's a blank run that's fairly normal for this area when the conditions don't line up. Keep the wax in the cupboard for now. Forecasts can change, but as it stands, there's no surf to be had.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 15°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Mon morning. Very mild (max 16°C on Fri night, min 13°C on Sat morning). Winds decreasing (fresh winds from the N on Sat morning, calm by Sun night). | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 12 | WSW 10 | SW 9 | SW 8 | SW 7 | SW 5 | SW 5 | NNW 4 | N 4 | N 5 | N 5 | N 4 | N 5 | N 5 | N 4 | W 7 | W 18 | SW 5 | SW 6 | SW 6 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 10 | 21 | 17 | 14 | 22 | 11 | 17 | 15 | 61 | 61 | 31 | 23 | 24 | 5 | 1 | 6 | 55 | 146 | 132 | 216 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | cross-off | cross-off | cross | cross-off | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | glassy | cross | on | cross-on | cross-off | cross-off | cross-on |
High Tide | 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 | 12:40PM3.48m | 1:01AM3.53m | |||||||
Low Tide | 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 | 7:13AM0.62m | 7:20PM0.79m | ||||||||
 |  |  | | | | | |  | | | | | |  |  | |  |  | | | |
 | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — |
 | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | — | — | — | — | — |
Temp °C | 23 | 25 | 24 | 21 | 21 | 19 | 17 | 17 | 16 | 13 | 15 | 15 | 14 | 15 | 16 | 14 | 14 | 15 | 17 | 17 | 18 |
Feels °C | 21 | 23 | 23 | 21 | 21 | 19 | 16 | 14 | 13 | 7 | 10 | 10 | 11 | 12 | 14 | 12 | 13 | 15 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 10 | WSW 10 | SW 9 | SW 8 | SW 7 | SW 8 | SW 5 | SW 5 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | W 7 | W 7 | N 4 | — | — | — | W 16 | — |
| kJ | 4 | 10 | 21 | 17 | 14 | 2 | 11 | 3 | 7 | 5 | 5 | 2 | 2 | 1 | 1 | 1 | — | — | — | 5 | — |
Swell 2 Height (m) Direction Period (s) | SW 6 | SW 6 | — | — | WSW 10 | SW 9 | SW 8 | SW 7 | W 11 | — | — | — | — | — | W 7 | W 7 | W 18 | — | — | — | — |
| kJ | 1 | 1 | — | — | 9 | 3 | 3 | 2 | 2 | — | — | — | — | — | 1 | 1 | 6 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 12 | — | — | — | — | SW 11 | SW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 6 | — | — | — | — | 5 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | — | — | — | — | SW 5 | NW 3 | NNW 4 | N 4 | N 5 | N 5 | N 4 | N 5 | N 5 | N 4 | — | SW 2 | SW 5 | SW 6 | SW 6 | WSW 7 |
| kJ | 1 | — | — | — | — | 22 | 4 | 17 | 15 | 61 | 61 | 31 | 23 | 24 | 5 | — | 1 | 55 | 146 | 132 | 216 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 187 | 113 | 113 | 137 | 295 | 145 | 132 | 132 | 284 | 311 | 540 | 292 | 292 | 305 | 305 | 298 | 297 | 10 | 71 | 292 | 292 |
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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