Surf Forecasts:
Rhosneigr surf forecast from 15 Sep 2026:
- Best quality surf: Sunday 20 Sep, 7AM (local time) - 2.5ft (0.7m), 6s period, SW swell with glassy winds.
- Most powerful swell: Friday 18 Sep, 10PM (local time) - 8ft (2.4m), 7s period, SW swell with 490 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 7AM (local time) - 2.5ft (0.7m), 6s 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 7AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.1m and 14s. Another secondary swell of 0.5m and 4s 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 2.4m 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 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 20th Sep) | 2.5ft (0.7m) 6s |
| Best Surf | 7AM (Sun 20th Sep) | 2.5ft (0.7m) 6s |
| Most Powerful | 10PM (Fri 18th Sep) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get straight into it.
Honestly, for the next 16 days, the surf outlook for Rhosneigr is a write-off. The guidance file flags the break as fairly consistent for a beginner-friendly spot, but the actual forecast gives us zero rideable waves across the entire period. Every single session is scored as poor surf conditions, so we’re looking at a long stretch with nothing to get excited about.
From Tuesday the 15th right through to Wednesday the 30th of September, we’re dealing with messy, onshore, or cross-onshore winds almost constantly. The combined swell energy is weak, mostly in the tens and low hundreds (max 296), but it never lines up with clean conditions. The best we see is a brief window on Wednesday morning the 23rd, with a light offshore breeze from the NE and 3ft of weak, short-period WNW swell (period 4 seconds). That’s clean but tiny. Then on Saturday the 26th afternoon, there’s a tiny 0.3ft groundswell from the SW with a very long 14-second period, and gentle offshore winds – glassy but basically flat.
For a beginner-friendly, exposed SW-facing beach, these are tough conditions. When there is a bit more energy, like the 6ft SW swell on Saturday the 19th, it’s accompanied by lumpy cross-onshore winds and chop. That combo would be more appealing for kite surfing than trying to paddle out on a shortboard.
So, plain and simple: there are no good surf options on offer in this 16-day window at Rhosneigr. For this area, a blank run like this is not unusual. It tends not to stay poor forever, and forecasts can change.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Mon night. Very mild (max 17°C on Mon night, min 13°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Fri night. Very mild (max 18°C on Sat morning, min 13°C on Thu night). Winds decreasing (strong winds from the SSW on Fri afternoon, calm by Sat night). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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) | WSW 5 | W 5 | SW 6 | NW 5 | W 4 | SW 5 | WSW 5 | W 5 | W 5 | W 5 | SW 5 | SW 7 | SW 7 | SW 7 | SW 6 | SSW 6 | SW 6 | SW 5 | SSW 5 | SSW 5 | SSW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 111 | 75 | 17 | 100 | 19 | 102 | 128 | 120 | 126 | 54 | 76 | 335 | 230 | 296 | 85 | 26 | 17 | 55 | 46 | 33 | 44 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 5:10AM2.63m | 5:52PM2.79m | 6:48AM2.73m | 7:09PM3.00m | ||||||||
Low Tide | 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 | 11:27AM1.71m | 00:33AM1.54m | 1:01PM1.56m | 1:44AM1.28m | |||||||
 |  |  | | | | | |  | |  | | | | | |  | | | | | |
 | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — |
 | — | 7:35 | — | — | 7:31 | — | — | 7:30 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — |
mm | — | 2 | 1 | — | — | 4 | — | — | — | — | 3 | 5 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 14 | 15 | 15 | 14 | 15 | 14 | 14 | 14 | 16 | 18 | 17 | 17 | 14 | 16 | 17 | 17 | 17 | 17 |
Feels °C | 10 | 12 | 11 | 9 | 10 | 9 | 8 | 9 | 7 | 9 | 7 | 11 | 14 | 13 | 15 | 10 | 13 | 15 | 17 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 6 | SW 6 | N 5 | — | — | — | — | — | — | — | — | — | SW 6 | SSW 6 | SW 6 | — | S 13 | — | — |
| kJ | — | — | 17 | 5 | 19 | — | — | — | — | — | — | — | — | — | 85 | 26 | 17 | — | 3 | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | SW 11 | SW 11 | W 11 | — | — | — | — | — | — | — | — | — | — | NW 4 | NNW 3 | — | — | — | — |
| kJ | — | — | 5 | 5 | 2 | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 14 | S 14 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 5 | W 5 | NW 5 | NW 5 | W 4 | SW 5 | WSW 5 | W 5 | W 5 | W 5 | SW 5 | SW 7 | SW 7 | SW 7 | — | — | — | SW 5 | SSW 5 | SSW 5 | SSW 5 |
| kJ | 111 | 75 | 66 | 100 | 19 | 102 | 128 | 120 | 126 | 54 | 76 | 335 | 230 | 296 | — | — | — | 55 | 46 | 33 | 44 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 543 | 543 | 175 | 190 | 259 | 283 | 283 | 543 | 175 | 259 | 300 | 259 | 381 | 46 | 46 | 152 | 183 | 174 | 174 | 253 | 159 |
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.
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