Surf Forecasts:
Rhosneigr surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 7PM (local time) - 3ft (0.9m), 6s period, SSW swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 10PM (local time) - 2.5ft (0.8m), 7s period, SSW swell with 64 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 7PM (local time) - 3ft (0.9m), 6s period with SSW swell.
Best Forecast Surf Conditions for Rhosneigr this week:
The surf forecast for Rhosneigr over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 26) at 7PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.3m and 8s. Another secondary swell of 0.1m and 12s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rhosneigr in the next 16 days are 0.8m 7s 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 1.3m 5s period and expected on Thursday (Aug 20) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 26th Aug) | 3ft (0.9m) 6s |
| Best Surf | 7PM (Wed 26th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 10PM (Wed 26th Aug) | 2.5ft (0.8m) 7s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright, folks, it’s Rusty here. Let’s be straight with you: the next couple of weeks are looking pretty grim on the surf front in this neck of the woods. We’ve got a long stretch of tiny, weak waves and messy winds ahead, so don’t get your hopes up for any classic sessions. We’re going to have to be patient.
The short-term forecast is a real bummer. For the first few days, we’re looking at waves barely bumping the sand – nothing over 2 feet and with weak energy readings in the teens and twenties (like 24 and 18). The wind is mostly cross-off or offshore, which would usually be a good sign, but there's just no swell to work with. It’ll be clean, but you’ll be bobbing around on a lake. The only real positive is that the water temperature is running much warmer than usual for this time of year, about 5°F warmer than average, which is pretty notable.
This flat spell stretches right through the rest of the week and into the weekend. From Friday the 21st through to Monday the 24th, the swell size is pinned at a pathetic 0.3 feet. The energy is bottoming out too, sometimes down in single digits. Even with light winds, there is absolutely nothing to ride. If you blinked, you'd miss the wave period readings. This isn't just a poor spell; it's a full-blown drought.
We start to see a pulse of something early in the second week, but it’s not pretty. Around Wednesday the 26th, there’s a bit more water moving, but the wind swings onshore, creating choppy, messy conditions. It stays poor through the 27th and 28th as the wind strengthens from the west, whipping up some sizable, but completely unsurfable, slop. By late on the 28th, we see the swell energy climb past 100 (148) for the first time, but the strong cross-onshore winds at 25 mph are going to turn it into a complete washing machine. The reading is still "poor surf conditions" and honestly, with that wind, the setup looks more interesting for kitesurfing than paddle surfing.
The weekend of the 29th and 30th serves up more of the same – onshore winds with waves building to around 6 feet, but it’s all short-period, wind-driven junk. The energy gets up there – 291 on Saturday afternoon – but with a 6-second period, it’s just a close-out, lumpy mess. This is only for someone desperate, and even then, you're not going to have any fun. The conditions remain poor.
The start of the next week, the 31st and 1st of September, doesn't offer much of an escape. The swell is still coming, but it's constantly crossed-up and messy. There's a lot of water moving, but the quality is just zero.
Towards the beginning of the second week, we finally see a glimmer of hope. On the 2nd of September, there’s a 7 foot swell pushing in, but an onshore wind ruins it. However, by the 3rd, the wind goes cross-off from the NNW while the swell holds at 7 feet from the SW. This is going to create some heavier, more powerful surf, and it might actually be the most legitimate window of the whole period. The energy is strong, reading at 328. However, at this size with a 6-second period, it’s not a beginner wave—you’ll need to know what you’re doing, and the crowd might be out for the few clean ones. The late-afternoon sessions on the 3rd fade quickly, and by the 4th, the swell starts to drop but with that cross-off wind, it could still have some fun, clean lines before fading out.
So, there you have it. It’s a pretty sad outlook overall. The first few days are totally flat, and most of the second week is blown out by onshore winds. Your only real chances for something half-decent are the 3rd and 4th of September, when a proper-size swell meets a favorable wind direction. Keep an eye on that, but don’t hold your breath for anything classic. We might just have to wait this one out.
Rusty, out.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu morning. Very mild (max 16°C on Fri afternoon, min 12°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Tue afternoon, min 14°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
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 6 | SW 6 | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | S 4 | SSW 6 | SSW 7 |
Wave Graph | |||||||||||||||||||||
16 | 10 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 7 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 15 | 58 | 56 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | off |
High Tide | 3:26PM3.00m | 4:05AM2.90m | 4:46PM2.83m | 5:38AM2.76m | 6:19PM2.84m | 7:04AM2.82m | 7:32PM3.02m | 8:05AM2.99m | 8:24PM3.28m | 8:49AM3.20m | 9:03PM3.55m | 9:25AM3.40m | 9:35PM3.81m | ||||||||
Low Tide | 10:08PM1.38m | 10:45AM1.54m | 11:34PM1.55m | 12:20PM1.61m | 1:12AM1.48m | 1:41PM1.46m | 2:17AM1.25m | 2:33PM1.20m | 3:02AM0.96m | 3:12PM0.93m | 3:39AM0.68m | 3:47PM0.67m | |||||||||
6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:16 | — | — | |
— | 8:36 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:23 | — | — | 8:22 | — | |
mm | 4 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 1 | 13 |
Temp °C | 15 | 15 | 14 | 15 | 16 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 21 | 22 | 20 | 21 | 23 | 21 | 18 | 20 | 17 |
Feels °C | 11 | 10 | 10 | 13 | 12 | 11 | 11 | 13 | 13 | 14 | 14 | 14 | 20 | 20 | 14 | 16 | 21 | 17 | 16 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 6 | SSW 6 | NNW 5 | W 4 | SW 13 | SW 15 | NNW 5 | NNW 5 | N 4 | N 4 | SW 14 | SW 14 | SW 13 | SW 13 | SSE 4 | NE 5 | NE 4 | SSW 8 | SSW 8 | SSW 7 |
16 | 10 | 3 | 28 | 1 | 7 | 8 | 20 | 7 | 3 | 1 | 8 | 8 | 7 | 7 | 2 | 7 | 1 | 6 | 6 | 56 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SW 6 | SW 6 | — | — | SW 15 | SW 15 | SW 14 | SW 14 | — | SW 9 | — | SW 8 | SW 13 | SW 13 | SW 8 | NE 4 | S 12 | S 12 |
8 | 8 | 8 | 1 | 1 | — | — | 8 | 8 | 8 | 7 | — | 3 | — | 3 | 7 | 7 | 2 | 1 | 3 | 3 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 14 | SW 13 | — | — | — | S 12 | — | — | SW 11 | — | SW 8 | — | SW 8 | — | SW 13 | S 12 | — | — |
— | — | — | 7 | 7 | — | — | — | 3 | — | — | 4 | — | 3 | — | 3 | — | 7 | 3 | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | N 5 | NNW 5 | NNW 5 | NNW 4 | NNW 5 | NNW 5 | — | — | — | — | — | — | — | ENE 3 | ENE 5 | — | S 2 | S 4 | SSW 6 | — |
26 | 62 | 64 | 50 | 7 | 32 | 26 | — | — | — | — | — | — | — | 2 | 11 | — | 1 | 15 | 58 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 169 | 832 | 187 | 49 | 283 | 190 | 235 | 283 | 159 | 211 | 299 | 159 | 253 | 256 | 256 | 385 | 324 | 262 | 294 | 181 | 0 |
Best forecast wave conditions in Anglesy | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Rhosneigr Surf forecast
The above surf forecast table for Rhosneigr provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rhosneigr can be found by selecting the local surf guide option on the grey menu. Our Rhosneigr 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 (Rhosneigr) 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 Rhosneigr 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 Anglesy? If you are looking for accommodation near Rhosneigr, camping, hotels and holiday cottages in Anglesy, consider staying in Anglesey which is 2 km (1 miles) away. Other places in and around Anglesy where you can find information about places to rent, and car hire include Holyhead which is 12 km (7 miles) away, Bangor, Porthmadog and Llandudno.










