
Surf Forecasts:
Rhosneigr surf forecast from 13 Sep 2026:
- Most powerful swell: Friday 18 Sep, 10PM (local time) - 8ft (2.5m), 7s period, SW swell with 640 kJ wave energy.
Best Forecast Surf Conditions for Rhosneigr this week:
The most powerful waves expected at Rhosneigr in the next 16 days are 2.5m 7s and forecast to arrive on Friday (Sep 18) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Fri 18th Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright, folks, it’s Rusty here. We’ve got a bit of a rough stretch ahead for Rhosneigr over the next couple of weeks. Honestly, I’m looking at this forecast and it’s pretty hard to find anything to get properly excited about. The whole 16-day window is a bit of a bust for good paddle surfing, so we need to be patient.
Right now, for today, Saturday the 12th, it’s onshore and messy. We're looking at a 6ft SW windswell with a short period of 7 seconds, pushed around by a 22 mph wind. The water is sitting at 63°, which is a touch warmer than normal for this time of year. The combined swell energy is moderate at best (314), but the quality is just poor.
The pattern continues for the next week. Through Sunday the 13th and into the following week, we’ve got a real mix of small, weak swells and strong, lumpy cross-onshore winds. Swell heights will be bouncing between 2ft and 5ft, but the period is consistently short – usually 4 to 6 seconds – meaning weak, choppy waves. On Tuesday the 17th and Wednesday the 18th, the combined energy picks up a bit to 86 and 124, but it’s still blown out and messy. There’s a period of more onshore wind from the SW on Friday the 18th evening with some 6ft swell and moderate energy (176), but the 22 mph wind is going to make it a washing machine.
Forget trying to get a clean wave in that first week. The setup is more interesting for kite surfing than paddle surfing with all that cross-onshore wind and lumpy water. We get a brief hint of glassy conditions on Wednesday afternoon, the 23rd, with the wind going calm and some 2ft SW swell showing, but the period is only 4 seconds, so it’ll be tiny and weak. That’s the only real quiet moment in the whole window, but it won’t provide any power.
From the 20th onward, the swell just drops off a cliff. For the entire second week, from the 20th of September through to the 27th, it’s all under 3ft, with most days showing less than 1.0ft of swell and very low energy values (1 to 37). The wind tries to go cross-off or glassy occasionally, but with no swell to work with, there’s just nothing to ride.
There’s nothing here to highlight as a standout. The entire period is a write-off for decent surf. It’s one of those blank runs that happens here. Forecasts can change, so keep an eye on it, but as it stands, leave the boards in the van.
Stay patient.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Mon night. Very mild (max 18°C on Sat afternoon, min 14°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the SSW by Mon afternoon). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Tue afternoon. Very mild (max 16°C on Tue afternoon, min 13°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 | SSW 7 | SSW 6 | SW 6 | SSW 6 | SSW 4 | SSW 5 | SSW 6 | WSW 6 | WNW 5 | SW 6 | NW 5 | W 4 | WSW 4 | WNW 5 | W 5 | W 4 | SW 5 | SW 6 | SW 7 |
Wave Graph | ||||||||||||||||||||
314 | 76 | 25 | 17 | 18 | 30 | 86 | 309 | 90 | 37 | 9 | 114 | 18 | 21 | 48 | 46 | 38 | 28 | 176 | 503 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross | cross-on | on | cross | cross-on | cross-on | on | on | on |
High Tide | 10:54PM4.52m | 11:16AM4.11m | 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 | |||||||
Low Tide | 5:22PM-0.06m | 5:48AM-0.24m | 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 | |||||||
— | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | |
7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — | — | 7:30 | — | — | 7:27 | — | |
mm | — | — | — | — | — | — | — | 19 | — | 1 | — | — | — | 2 | — | — | — | — | — | 6 |
Temp °C | 18 | 18 | 17 | 17 | 17 | 16 | 17 | 17 | 15 | 16 | 14 | 13 | 15 | 15 | 14 | 15 | 14 | 15 | 15 | 16 |
Feels °C | 14 | 18 | 17 | 17 | 16 | 13 | 13 | 12 | 12 | 12 | 8 | 8 | 11 | 11 | 8 | 11 | 9 | 9 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | — | SSW 7 | SSW 6 | SW 6 | — | — | — | — | — | SW 6 | SW 6 | SW 6 | N 5 | NNW 5 | SW 6 | — | — | NW 4 | — | — |
— | 76 | 25 | 17 | — | — | — | — | — | 24 | 9 | 5 | 19 | 4 | 38 | — | — | 9 | — | — | |
Swell 2 Height (m) Direction Period (s) | — | NW 4 | — | — | — | — | — | — | — | — | S 11 | SW 11 | SW 5 | — | — | — | — | — | — | — |
— | 2 | — | — | — | — | — | — | — | — | 2 | 5 | 1 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 11 | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 7 | — | — | — | SSW 6 | SSW 4 | SSW 5 | SSW 6 | WSW 6 | WNW 5 | NW 5 | NW 5 | W 4 | WSW 4 | WNW 5 | W 5 | W 4 | SW 5 | SW 6 | SW 7 |
314 | — | — | — | 18 | 30 | 86 | 309 | 90 | 37 | 63 | 114 | 18 | 21 | 48 | 46 | 38 | 28 | 176 | 503 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 331 | 0 | 46 | 175 | 253 | 253 | 253 | 296 | 46 | 543 | 189 | 175 | 183 | 253 | 282 | 284 | 590 | 381 | 497 | 786 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










