Surf Forecasts:
Rhosneigr surf forecast from 13 Sep 2026:
- Best quality surf: Sunday 20 Sep, 1AM (local time) - 3.5ft (1.1m), 7s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 7PM (local time) - 6ft (1.9m), 7s period, SW swell with 361 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 1AM (local time) - 3.5ft (1.1m), 7s period with SW 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 Sunday (Sep 20) at 1AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.8m and 4s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rhosneigr in the next 16 days are 1.9m 7s and forecast to arrive on Saturday (Sep 19) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 20th Sep) | 3.5ft (1.1m) 7s |
| Best Surf | 1AM (Sun 20th Sep) | 3.5ft (1.1m) 7s |
| Most Powerful | 7PM (Sat 19th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Right now, the surf is pretty ordinary out at Rhosneigr. A bit of swell is on the way, but the wind is just not playing ball for most of the period. We're looking at a run of cross-onshore winds that are going to keep things lumpy and chopped up. It's not what you'd call inspiring.
The first proper swell starts to show on the 17th, but the onshore wind is going to wreck any chance of clean waves. We're talking around 5ft at 5 seconds, with the energy building to 138 (moderate) Thursday morning, but it's all going to be messy. It stays pretty average through the 18th and 19th, with a bit more size pushing up to 6ft and 6ft at 6-7 seconds, but the wind continues to ruin the shape. The swell is coming from the SW, which is the right direction, but the conditions are just not there.
There's a slight let-up on the 20th and 21st, but the swell dies right off. We're down to 3ft on Sunday morning, then it drops to nothing on the 21st with a strong onshore breeze – that's a write-off.
The real standout, if you can wait for it, is the 23rd. The wind finally swings offshore, coming out of the N, and the swell is 5ft at 5 seconds in the morning, building to 7ft by the afternoon, with the energy jumping to 308 (strong). That's the one day that will have some real push and clean lines. It's a bit of a beefy swell, so it's not one for the beginners, but the more experienced crew will be on it.
After that, it fades out pretty quickly. The 24th and 25th see the swell dropping right off, with the water turning glassy and clean, but there's just nothing to ride. The 26th and 27th have waves of only 0.3ft to 2ft, and by the 28th it's just the dregs. That's the long story of it – a lot of average, one day of real potential on the 23rd, and then a whole lot of nothing.
That first good day with clean surf is the 23rd, keep that in mind. It's a bit far out, so the details could change, but that's your best bet. The water temp is sitting at 62°F, which is a touch warmer than normal for this time of year, so not too bad for a paddle.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Very mild (max 17°C on Sun afternoon, min 13°C on Tue night). Winds increasing (light winds from the WSW on Sun afternoon, strong winds from the SSW by Mon night). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Wed night. Very mild (max 16°C on Wed afternoon, min 13°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 | SSW 6 | SSW 5 | SSW 5 | SW 6 | WSW 5 | W 5 | NW 5 | SW 6 | NW 5 | SW 5 | WSW 5 | W 5 | WNW 6 | W 6 | SW 5 | SW 6 | SW 6 | SW 7 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 18 | 22 | 24 | 95 | 239 | 109 | 61 | 79 | 6 | 56 | 60 | 138 | 120 | 194 | 169 | 55 | 118 | 255 | 314 | 100 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-off |
High Tide | 11:30PM4.39m | 11:50AM4.02m | 00:07AM4.16m | 12:24PM3.85m | 00:44AM3.84m | 1:00PM3.60m | 1:24AM3.48m | 1:40PM3.31m | 2:09AM3.11m | 2:30PM3.01m | 3:16AM2.79m | 3:54PM2.78m | ||||||||
Low Tide | 5:59PM0.01m | 6:23AM-0.01m | 6:35PM0.19m | 6:58AM0.30m | 7:12PM0.44m | 7:33AM0.66m | 7:49PM0.75m | 8:09AM1.03m | 8:30PM1.08m | 8:52AM1.36m | 9:24PM1.38m | 9:52AM1.62m | 10:46PM1.58m | |||||||
 |  | | |  |  | | | |  |  | |  | | | | |  | |  | |
 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — |
 | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — | — | 7:30 | — | — | 7:27 | — | — | 7:24 | — |
mm | — | — | — | — | 2 | — | — | — | — | — | 2 | — | 1 | — | — | — | 4 | 2 | 1 | — |
Temp °C | 17 | 17 | 17 | 17 | 17 | 14 | 17 | 15 | 14 | 16 | 15 | 14 | 15 | 14 | 14 | 15 | 16 | 16 | 16 | 15 |
Feels °C | 17 | 17 | 16 | 12 | 12 | 8 | 14 | 10 | 9 | 12 | 10 | 9 | 9 | 7 | 9 | 9 | 13 | 13 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 6 | — | — | SW 12 | — | — | — | SW 6 | SW 6 | — | N 5 | — | — | — | — | NNW 6 | — | — | — | SW 7 |
| kJ | 18 | — | — | 6 | — | — | — | 17 | 6 | — | 2 | — | — | — | — | 11 | — | — | — | 100 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 11 | SW 11 | W 11 | — | — | — | — | — | NW 5 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 5 | 5 | 2 | — | — | — | — | — | 6 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 11 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSW 6 | SSW 5 | SSW 5 | SW 6 | WSW 5 | W 5 | NW 5 | NW 6 | NW 5 | SW 5 | WSW 5 | W 5 | WNW 6 | W 6 | SW 5 | SW 6 | SW 6 | SW 7 | NW 4 |
| kJ | — | 22 | 24 | 95 | 239 | 109 | 61 | 79 | 124 | 56 | 60 | 138 | 120 | 194 | 169 | 55 | 118 | 255 | 314 | 20 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 253 | 253 | 253 | 253 | 283 | 543 | 508 | 189 | 175 | 271 | 277 | 282 | 294 | 543 | 381 | 259 | 259 | 307 | 46 | 0 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’
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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.
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