Surf Forecasts:
Rhosneigr surf forecast from 31 Aug 2026:
- Most powerful swell: Thursday 3 Sep, 7PM (local time) - 7ft (2.2m), 7s period, SW swell with 434 kJ wave energy.
Best Forecast Surf Conditions for Rhosneigr this week:
The most powerful waves expected at Rhosneigr in the next 16 days are 2.2m 7s and forecast to arrive on Thursday (Sep 03) at 7PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Sep 05) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Thu 3rd Sep) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright, I’ve had a look through the charts for the next couple of weeks, and it’s a real tough stretch for us. We’re talking about Rhosneigr, and the water’s running a touch warmer than normal for the time of year—about 18°; that’s a couple of degrees above average, so it’s a nice change if you’re getting in.
Right now, from Monday the 31st of August, we’ve got a messy picture. The morning brings a weak swell from the WNW at 4 ft, but that period is a short 5 seconds with a fresh cross-shore wind, creating lumpy, choppy conditions. The combined swell energy is only 149, so it’s weak, and it’s just not coming together. That’s the story for the whole first week, honestly. The swells are small, the wind is onshore or cross-onshore, and every single report says “poor surf conditions.” There’s nothing to get excited about.
We’ll see a bit of a bump in swell size on Thursday the 3rd and Friday the 4th, with the swell hitting 7 ft at times, but it’s onshore wind and the period is still short—around 6 seconds. The energy climbs to 319 and 299, which is moderate, but with the wind smashing it, it’s just a blown-out mess. That’s more for the kite surfers if anything.
The weekend of the 5th and 6th of September stays small and weak, with the wind still cross-onshore and lumpy. The early part of the second week, from the 8th to the 11th, is a total write-off—tiny waves, hardly any energy, and the wind is still messy. There’s even a day with a light breeze and clean conditions on the 12th of September, but the swell is only 0.7 ft to 1.0 ft, so you’re just floating.
Then, late in the outlook, we’ve got a promising pulse showing up on the 13th of September. The swell starts to build again, reaching 6 ft by Sunday afternoon with a 6-second period from the SSW, and the combined energy hits 231 (moderate). The wind is light, which is a big positive. By Monday the 14th, it’s still around 6 ft, but the wind turns onshore and fresh. The real standout might be on Tuesday the 15th of September—the morning brings a 8 ft SSW swell, with an 8-second period, and the combined energy is a strong 640. That’s a proper swell, but it’s also blown out by a strong onshore breeze at 28 mph. This is expert-only territory, and even then, it’s going to be a wild, choppy beast. It’s a long way out, so keep an eye on it, but don’t book the day off yet.
In short, we’ve got a long gap of nothing good until the 13th, and even then it’s a gamble. The 15th has the best size, but the wind will ruin it. For now, keep the board waxed and wait for the next forecast.
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Wed morning. Very mild (max 18°C on Wed night, min 14°C on Mon morning). Winds increasing (light winds from the WSW on Tue night, fresh winds from the SSW by Wed afternoon). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu morning, min 14°C on Fri morning). Winds decreasing (strong winds from the WSW on Fri morning, light winds from the SSW by Sat afternoon). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | WNW 5 | SW 8 | SSW 7 | SW 4 | SSW 5 | SW 5 | SSW 5 | SSW 6 | SW 6 | SW 5 | SSW 6 | SW 7 | WSW 6 | SW 6 | W 6 | NW 6 | WSW 4 | SW 4 | SSW 4 | SSW 5 | SW 5 |
Wave Graph | |||||||||||||||||||||
87 | 50 | 21 | 16 | 61 | 39 | 69 | 179 | 181 | 106 | 319 | 207 | 299 | 223 | 192 | 100 | 14 | 14 | 35 | 66 | 119 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 11:49AM3.93m | 00:03AM4.23m | 12:23PM3.87m | 00:40AM4.07m | 1:01PM3.73m | 1:22AM3.82m | 1:47PM3.51m | 2:14AM3.50m | 2:44PM3.26m | 3:24AM3.18m | 4:06PM3.08m | 5:04AM3.02m | 5:48PM3.13m | ||||||||
Low Tide | 6:37PM0.27m | 7:03AM0.19m | 7:16PM0.42m | 7:43AM0.43m | 7:59PM0.63m | 8:28AM0.72m | 8:50PM0.88m | 9:25AM1.02m | 9:57PM1.11m | 10:40AM1.25m | 11:26PM1.19m | 12:11PM1.26m | 00:57AM0.99m | ||||||||
6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | |
— | 8:10 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 | — | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — | |
mm | — | — | — | — | 1 | 2 | 5 | — | — | 1 | 4 | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 16 | 15 | 17 | 17 | 17 | 17 | 18 | 17 | 17 | 17 | 16 | 17 | 16 | 14 | 15 | 15 | 15 | 16 | 16 |
Feels °C | 9 | 12 | 13 | 11 | 12 | 16 | 13 | 12 | 16 | 14 | 13 | 12 | 9 | 10 | 10 | 9 | 13 | 13 | 9 | 9 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SSW 7 | — | — | — | SW 16 | SW 16 | SW 15 | — | — | SW 14 | — | SW 14 | SW 14 | SW 6 | NNW 5 | NNW 5 | SW 13 | SW 13 | — |
62 | 50 | 21 | — | — | — | 10 | 10 | 9 | — | — | 8 | — | 8 | 8 | 20 | 23 | 2 | 7 | 6 | — | |
Swell 2 Height (m) Direction Period (s) | — | N 5 | NNW 4 | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 13 | SW 13 | — | — | — |
— | 7 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | — | — | — | |
Wind waves Height (m) Direction Period (s) | WNW 5 | WNW 4 | W 3 | SW 4 | SSW 5 | SW 5 | SSW 5 | SSW 6 | SW 6 | SW 5 | SSW 6 | SW 7 | WSW 6 | SW 6 | W 6 | NW 6 | WSW 4 | SW 4 | SSW 4 | SSW 5 | SW 5 |
87 | 23 | 6 | 16 | 61 | 39 | 69 | 179 | 181 | 106 | 319 | 207 | 299 | 223 | 192 | 100 | 14 | 14 | 35 | 66 | 119 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 543 | 46 | 46 | 285 | 299 | 253 | 266 | 296 | 300 | 283 | 287 | 315 | 471 | 543 | 508 | 183 | 46 | 174 | 233 | 296 | 259 |
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.










