Surf Forecasts:
Rhosneigr surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 7AM (local time) - 2ft (0.6m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 4AM (local time) - 2.5ft (0.8m), 6s period, SW swell with 46 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 7AM (local time) - 2ft (0.6m), 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 Thursday (Aug 20) at 7AM. The primary swell is predicted to be 0.6m and 6s period with a secondary swell of 0.1m and 15s. Another secondary swell of 0.7m and 4s is also forecast. 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 0.8m 6s and forecast to arrive on Thursday (Aug 20) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Aug 20) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 20th Aug) | 2ft (0.6m) 6s |
| Best Surf | 7AM (Thu 20th Aug) | 2ft (0.6m) 6s |
| Most Powerful | 4AM (Thu 20th Aug) | 2.5ft (0.8m) 6s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a look at what's on the menu for Rhosneigr.
Right off the bat, it's a tough start. We're looking at a long run of flat or near-flat conditions. From Wednesday the 19th all the way through until the morning of Thursday the 27th, there's simply nothing worth paddling out for. The water is pretty warm right now at 65°, which is much warmer than normal for this time of year, but that won't help with the lack of waves. We're talking about a week or more of tiny, weak dribble and poor surf.
Then, out of nowhere, things get interesting. On Thursday the 27th of August, a big pulse of SW swell hits. The morning brings a solid 10 ft swell from the SW, but with a short period of 7 seconds. This is a chunky, powerful wall of water – the energy reading is up at 731, which is serious – but it's a lot of juice for this break. The text on this is clear: the swell is predicted to be too big for the spot, so that morning session is a gamble for experienced locals only, and you'll want to be careful.
The real standout, and the only one I'd genuinely call good, comes on the afternoon of Thursday the 27th. The swell drops back to a more manageable 8 ft, still from the SW, and the wind swings around to a light NNW breeze. That's a clean, offshore wind for Rhosneigr, and the forecast is promising "very good surf conditions." The energy stays high at 612. This is the window. The swell is still a bit hefty for beginners, pushing into the expert range at 8 ft, but for anyone with experience, the afternoon looks like the goods. The big catch is the short period. With only 7 seconds, this is a windswell. It'll be peaky and a bit crumbly, not the long, lined-up groundswell we dream of, but with that offshore wind, it’ll be clean and fun.
After that brief spike, the swell fades fast. Friday the 28th through the rest of the 16-day forecast drops back into poor, small conditions. The second week is a write-off for surf, with more onshore winds and tiny swell.
So, to sum it up: save your energy for Thursday the 27th. The morning is a beast, the afternoon is the pick of the fortnight. It's a long wait, but that one afternoon window is worth it.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu morning. Very mild (max 17°C on Wed afternoon, min 12°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Mon afternoon, min 13°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 4 | SW 6 | SW 6 | SW 6 | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 26 | 44 | 16 | 10 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 7 | 8 | 8 | 7 | 7 | 7 | 7 | 7 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:56AM3.21m | 3:26PM3.00m | 4:05AM2.90m | 4:46PM2.83m | 5:38AM2.76m | 6:19PM2.84m | 7:04AM2.82m | 7:32PM3.02m | 8:05AM2.99m | 8:24PM3.28m | 8:49AM3.20m | 9:03PM3.55m | ||||||||
Low Tide | 9:10PM1.10m | 9:40AM1.27m | 10:08PM1.38m | 10:45AM1.54m | 11:34PM1.55m | 12:20PM1.61m | 1:12AM1.48m | 1:41PM1.46m | 2:17AM1.25m | 2:33PM1.20m | 3:02AM0.96m | 3:12PM0.93m | 3:39AM0.68m | |||||||
 |  |  | |  |  |  |  | | | | | | | | | | | | | |
 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — |
 | 8:37 | — | — | 8:36 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:23 | — |
mm | 2 | 6 | 5 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 |
Temp °C | 17 | 16 | 16 | 15 | 14 | 16 | 17 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 21 | 22 | 19 | 22 | 23 | 18 |
Feels °C | 12 | 15 | 13 | 10 | 10 | 13 | 13 | 11 | 11 | 13 | 13 | 14 | 14 | 14 | 19 | 20 | 13 | 17 | 19 | 15 |
Swell 1 Height (m) Direction Period (s) | WNW 4 | SW 6 | SW 6 | SW 6 | SSW 6 | W 4 | W 3 | SW 13 | SW 15 | NNW 5 | N 5 | N 4 | N 4 | SW 14 | SW 14 | SW 13 | SW 13 | SSE 4 | SSE 4 | NE 6 |
| kJ | 1 | 44 | 16 | 10 | 4 | 3 | 1 | 7 | 8 | 19 | 11 | 6 | 3 | 8 | 8 | 7 | 7 | 4 | 3 | 11 |
Swell 2 Height (m) Direction Period (s) | S 15 | SW 16 | SW 15 | SW 14 | SW 14 | SW 6 | SW 6 | — | — | SW 15 | SW 15 | SW 14 | SW 14 | — | W 9 | SW 9 | SW 8 | SW 13 | SW 13 | SW 8 |
| kJ | 5 | 10 | 8 | 8 | 8 | 1 | 1 | — | — | 8 | 8 | 8 | 7 | — | 2 | 3 | 3 | 7 | 7 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 14 | SW 13 | — | — | — | S 12 | — | — | — | — | — | SW 8 | SW 8 | SW 8 | SW 13 |
| kJ | — | — | — | — | — | 7 | 7 | — | — | — | 3 | — | — | — | — | — | 3 | 3 | 3 | 7 |
Wind waves Height (m) Direction Period (s) | SW 4 | WNW 4 | NNW 5 | N 5 | NNW 5 | NNW 5 | N 4 | NNW 5 | NNW 5 | — | — | — | NNW 4 | — | — | — | ESE 4 | ENE 5 | ENE 5 | SSE 4 |
| kJ | 26 | 11 | 57 | 79 | 53 | 24 | 11 | 43 | 48 | — | — | — | 3 | — | — | — | 13 | 17 | 17 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 242 | 832 | 169 | 508 | 187 | 187 | 283 | 190 | 234 | 277 | 180 | 180 | 322 | 159 | 253 | 257 | 259 | 325 | 256 | 328 |
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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