Surf Forecasts:
Whistling Sands (Porth Oer) surf forecast from 4 Sep 2026:
- Most powerful swell: Monday 7 Sep, 1PM (local time) - 4.5ft (1.3m), 13s period, SW swell with 560 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 1.3m 13s and forecast to arrive on Monday (Sep 07) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Sunday (Sep 06) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Mon 7th Sep) | 4.5ft (1.3m) 13s |
Table - best surf conditions forecast for Whistling Sands (Porth Oer) over the next 16 days.
The Lowdown
Hey, it’s Rusty again. Let’s have a look at Whistling Sands (Porth Oer) and what’s coming our way for the next couple of weeks. I’ll be honest with you, it’s looking bleak.
We start off on Friday, 4th September. The water is at 62°F, a touch warmer than you’d expect for early autumn. The surf is 5ft from the WSW, but the energy is weak at only (230). A 30 mph cross-onshore wind from the west is making it lumpy and messy. Not a pretty picture.
Saturday the 5th is smaller, with 3ft swell from the SW. Energy drops to (59). The wind is 9 mph from the WSW, still cross-onshore and choppy in the morning. The afternoon cleans up a bit with a cross-off breeze, but the swell is just 2ft. Not worth it.
From Sunday the 6th all the way to Friday the 19th, it’s basically flat. There’s a bump on Monday the 7th afternoon, with 6ft from the SW, but a 28 mph cross-shore wind is tearing it up, making it a mess. Energy reads (217) but it’s poor quality. Tuesday the 8th and Wednesday the 9th see similar sized swell over 6ft, but again hammered by fresh to strong cross-onshore winds.
After the 11th, it’s game over. Tiny 1ft to 2ft waves, with next to no energy. By the 19th, there’s no swell at all. If you’re a kiter, those windy days in the first week with bumpy 4ft to 6ft seas might get you excited, but for a surfer, this is a total blank.
It’s a dead stretch, but that happens here. Never say never, but right now, there’s nothing worth chasing.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sat night. Very mild (max 19°C on Sun afternoon, min 13°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Thu morning. Very mild (max 16°C on Mon afternoon, min 13°C on Tue morning). Winds decreasing (strong winds from the SW on Mon afternoon, light winds from the W by Wed afternoon). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | WSW 7 | W 5 | SW 6 | SW 6 | SW 13 | SW 13 | SW 13 | W 16 | WSW 14 | SW 6 | WSW 7 | WSW 6 | WSW 6 | W 6 | WNW 6 | WSW 6 | WSW 4 | SW 6 | SW 6 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 222 | 117 | 52 | 28 | 7 | 7 | 6 | 6 | 77 | 217 | 269 | 279 | 218 | 253 | 283 | 44 | 17 | 175 | 151 | 115 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on |
High Tide | 2:25AM3.15m | 3:02PM3.03m | 3:52AM2.93m | 4:36PM3.02m | 5:28AM2.98m | 6:01PM3.28m | 6:41AM3.22m | 7:03PM3.65m | 7:36AM3.52m | 7:53PM4.02m | 8:20AM3.78m | 8:36PM4.30m | ||||||||
Low Tide | 8:50PM1.14m | 9:38AM1.30m | 10:31PM1.24m | 11:19AM1.31m | 00:09AM1.06m | 12:42PM1.09m | 1:21AM0.71m | 1:43PM0.77m | 2:16AM0.35m | 2:31PM0.47m | 3:02AM0.05m | 3:14PM0.23m | 3:43AM-0.12m | |||||||
 |  |  | |  | |  |  | |  | | | | | | | |  | |  | |
 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — |
 | 8:00 | — | — | 7:59 | — | — | 7:57 | — | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:46 | — |
mm | — | — | — | — | 4 | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 3 | 2 | — |
Temp °C | 17 | 16 | 14 | 15 | 15 | 18 | 19 | 17 | 15 | 16 | 15 | 15 | 16 | 15 | 14 | 16 | 16 | 16 | 18 | 18 |
Feels °C | 11 | 9 | 11 | 11 | 11 | 12 | 13 | 13 | 10 | 8 | 8 | 7 | 8 | 7 | 7 | 13 | 12 | 10 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | NW 5 | NW 4 | WSW 6 | SW 13 | SW 13 | SW 12 | WSW 14 | — | — | — | — | — | — | NNW 6 | NNW 5 | N 5 | — | SW 7 |
| kJ | 8 | 8 | 25 | 6 | 4 | 7 | 6 | 6 | 77 | — | — | — | — | — | — | 88 | 18 | 2 | — | 115 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 14 | N 5 | SW 13 | SW 13 | — | W 16 | NW 4 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 7 | 2 | 7 | 7 | — | 5 | 3 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 7 | W 5 | SW 6 | SW 6 | SSW 4 | SSW 5 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 7 | WSW 6 | WSW 6 | W 6 | WNW 6 | WSW 6 | WSW 4 | SW 6 | SW 6 | — |
| kJ | 222 | 117 | 52 | 28 | 13 | 48 | 88 | 104 | 52 | 217 | 269 | 279 | 218 | 253 | 283 | 44 | 17 | 175 | 151 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 467 | 130 | 145 | 241 | 139 | 191 | 296 | 189 | 288 | 467 | 125 | 312 | 578 | 736 | 362 | 310 | 256 | 256 | 250 | 250 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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