Surf Forecasts:
Rhosneigr surf forecast from 15 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 4AM (local time) - 6ft (1.8m), 6s period, SW swell with 256 kJ wave energy.
Best Forecast Surf Conditions for Rhosneigr this week:
The most powerful waves expected at Rhosneigr in the next 16 days are 1.8m 6s and forecast to arrive on Thursday (Sep 17) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Wednesday (Sep 16) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Thu 17th Sep) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright, grab ya board and let's have a look at what Rhosneigr's got cookin' over the next couple of weeks.
First off, I gotta be straight with ya. The next week and a half is lookin' pretty grim. We've got a run of poor surf conditions that's gonna last basically from now through the 27th of September. It's a real dry spell, with the swell all over the place and the wind mostly cross or onshore, chopping everything up. There's a bit of energy on the 17th and 18th, with the swell around 5.2ft to 5.6ft from the WSW and SW, but the onshore wind is gonna turn it into a lumpy mess. Not worth getting wet for, unless you're just desperate for a paddle.
The water temp is sittin' at 62.4°F, which is a touch warmer than normal for this time of year, so you won't need the thickest suit in the quiver.
Now, here's where things get interesting. The real standout window is the 28th and 29th of September. We finally see the wind swing around, and the swell starts to fill in properly. On the 28th, there's a decent-sized WSW swell pushing 9.8ft in the morning, with light offshore winds. That's a lot of water, though. It might be too big for the beginners, that's for sure. The energy's strong too, with a combined energy reading of 993. But by the afternoon, the swell drops to a much more manageable 6.6ft, and the wind goes glassy. That's the cleanest it's gonna get, and "expect very good surf conditions" is what the forecast is saying.
The morning of the 29th is another good one. You've got a 6.9ft W swell with a clean offshore ENE wind. The period's around 6 seconds, so it's not a long-period groundswell, but the surf is gonna be clean and fun. The energy is still solid at 379.
So, if you can wait, the 28th afternoon and the 29th morning at Rhosneigr are your best bets. That's the standout window. Don't get too hyped on anything before that, because it's gonna be a long wait.
Short Range ForecastLight rain (total 8mm), mostly falling on Tue afternoon. Very mild (max 16°C on Tue afternoon, min 13°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri afternoon. Very mild (max 17°C on Sat afternoon, min 13°C on Sat night). Winds decreasing (fresh winds from the SSW on Fri afternoon, light winds from the S by Sun 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 6 | W 6 | WSW 5 | SW 6 | SW 6 | SW 7 | SSW 7 | SW 6 | SW 6 | SSW 4 | SSW 5 | SSW 4 | SSW 4 | SW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 117 | 73 | 13 | 71 | 23 | 152 | 156 | 174 | 160 | 69 | 189 | 143 | 176 | 76 | 37 | 33 | 20 | 33 | 10 | 7 | 5 |
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 | cross-on | on | cross-on | on | on | 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 | 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 | — | 3 | 1 | — | — | 4 | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 14 | 15 | 15 | 14 | 14 | 14 | 15 | 16 | 16 | 16 | 17 | 16 | 13 | 14 | 16 | 17 | 18 | 18 |
Feels °C | 10 | 12 | 10 | 9 | 9 | 9 | 7 | 7 | 7 | 10 | 12 | 12 | 12 | 13 | 12 | 11 | 12 | 14 | 17 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 6 | SW 5 | N 5 | — | — | — | N 15 | NW 6 | — | — | — | WNW 4 | SW 6 | NW 4 | — | — | — | S 13 | — |
| kJ | — | — | 13 | 4 | 13 | — | — | — | 4 | 8 | — | — | — | 7 | 37 | 4 | — | — | — | 3 | — |
Swell 2 Height (m) Direction Period (s) | — | — | SW 11 | SW 11 | — | — | — | — | — | — | — | — | — | — | — | S 14 | — | — | S 13 | S 13 | — |
| kJ | — | — | 5 | 5 | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | 3 | 3 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | S 14 | — | — | — | S 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 4 | — | — | — | 3 |
Wind waves Height (m) Direction Period (s) | WSW 5 | W 5 | NW 5 | NW 5 | W 4 | SW 5 | WSW 5 | W 6 | W 6 | WSW 5 | SW 6 | SW 6 | SW 7 | SSW 7 | WNW 4 | SW 6 | SSW 4 | SSW 5 | SSW 4 | SSW 4 | SW 4 |
| kJ | 117 | 73 | 71 | 71 | 23 | 152 | 156 | 174 | 160 | 69 | 189 | 143 | 176 | 76 | 7 | 33 | 20 | 33 | 10 | 7 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 543 | 606 | 175 | 175 | 259 | 283 | 283 | 543 | 175 | 259 | 259 | 259 | 46 | 283 | 175 | 46 | 46 | 174 | 159 | 242 | 178 |
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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