Surf Forecasts:
Rhosneigr surf forecast from 16 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 4.5ft (1.4m), 5s period, SW swell with 102 kJ wave energy.
Best Forecast Surf Conditions for Rhosneigr this week:
The most powerful waves expected at Rhosneigr in the next 16 days are 1.4m 5s and forecast to arrive on Wednesday (Aug 19) at 7PM. Winds are predicted to be cross-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 Thursday (Aug 20) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Wed 19th Aug) | 4.5ft (1.4m) 5s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s cut to the chase on the surf ahead for Rhosneigr. It’s looking flat, real flat. The next couple of weeks are a write-off for any real waves. We’ve got a long stretch of nothing, and the few small bumps we see are weak and messy.
The water is a standout, though. It’s sitting at 18° which is about 2° warmer than normal for this time of year. That’s a real bonus, you’ll be comfortable out there, even if you’re just floating around.
The wind is all over the place, but the main problem is the lack of swell. For the first several days, into the start of next week, there’s nothing. The wave energy is pitiful, with readings like 11 or 28, just showing how dead the ocean is.
The middle of next week, around the 18th and 19th, we see a tiny bump to maybe 0.8m, but it’s sloppy with cross-onshore winds. It’s going to be a choppy mess, not worth the paddle out.
There’s a glimmer on the 17th with a tiny 0.3m south swell, but the period is a short 3 seconds and it's wind-blown. Nothing to get excited about.
The following weekend, from the 21st, the wind goes offshore which cleans things up, but the waves stay tiny. We’re talking 0.1m to 0.3m with energy of just 4 to 8. It’ll be glassy, but it’s just not surfable.
Right at the end of the period, on the 27th and 28th of August, there is a slight hint of life. We might see a small push to 0.5m from the south-southwest with a touch more period. Still small, but with clean offshore winds, it might be a longboard and a prayer kind of session.
Overall, the whole 16 days is a huge struggle with major gaps in any kind of surf. This is a classic flat spell for the area, and you just have to wait it out.
Rusty, out.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon night. Very mild (max 17°C on Mon night, min 13°C on Sat night). Winds increasing (calm on Sat night, fresh winds from the S by Mon night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed afternoon. Very mild (max 17°C on Tue night, min 12°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | — | — | SSW 3 | NW 3 | SW 5 | SW 4 | WNW 5 | W 4 | WNW 4 | W 4 | SW 5 | NW 5 | SW 6 | SW 6 | SW 14 | SW 14 | SW 13 | SW 13 | SW 15 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 4 | 2 | 3 | 25 | 37 | 24 | 20 | 38 | 92 | 41 | 12 | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | on | on | cross-on | cross | cross | cross-off | cross | cross-off | cross-off | off | off | off |
High Tide | 12:25PM3.91m | 00:40AM4.27m | 1:04PM3.73m | 1:21AM3.95m | 1:44PM3.51m | 2:05AM3.58m | 2:29PM3.25m | 2:56AM3.21m | 3:26PM3.00m | 4:05AM2.90m | 4:46PM2.83m | 5:38AM2.76m | 6:19PM2.84m | ||||||||
Low Tide | 6:55AM-0.16m | 7:05PM0.20m | 7:34AM0.15m | 7:45PM0.46m | 8:13AM0.53m | 8:25PM0.77m | 8:54AM0.92m | 9:10PM1.10m | 9:40AM1.27m | 10:08PM1.38m | 10:45AM1.54m | 11:34PM1.55m | 12:20PM1.61m | 1:12AM1.48m | |||||||
 |  |  |  | |  | | |  | | | | |  |  | | | | | | | |
 | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — |
 | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:32 | — | — | 8:30 | — |
mm | — | 1 | — | — | — | 3 | — | — | — | — | 1 | 2 | — | — | — | — | — | 2 | — | — | — |
Temp °C | 15 | 15 | 16 | 15 | 15 | 17 | 16 | 17 | 17 | 15 | 17 | 16 | 15 | 16 | 15 | 14 | 15 | 14 | 15 | 16 | 15 |
Feels °C | 14 | 13 | 16 | 14 | 14 | 15 | 12 | 14 | 16 | 9 | 11 | 11 | 12 | 13 | 13 | 11 | 12 | 13 | 9 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | — | SW 4 | SW 5 | — | SW 5 | — | SW 5 | SW 16 | WNW 5 | SW 6 | SW 6 | SW 6 | SW 5 | NNW 5 | NNW 4 | SW 13 | NNW 4 | SW 15 | SW 15 |
| kJ | — | — | — | 2 | 3 | — | 22 | — | 1 | 10 | 3 | 38 | 12 | 5 | 1 | 28 | 6 | 7 | 3 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 3 | — | — | S 16 | — | — | — | SW 16 | SW 15 | SW 14 | SW 14 | SW 5 | W 3 | — | SW 15 | — | S 12 |
| kJ | — | — | — | — | 2 | — | — | 5 | — | — | — | 10 | 8 | 8 | 8 | 1 | 2 | — | 8 | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 13 | — | — | S 12 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | — | — | 3 | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 3 | NW 3 | NW 3 | SW 4 | WNW 5 | W 4 | WNW 4 | W 4 | SW 5 | NW 5 | NNW 5 | NW 4 | NNW 5 | — | WNW 4 | NNE 4 | — | NNW 4 | NNW 4 |
| kJ | — | — | 4 | 2 | 3 | 25 | 37 | 24 | 20 | 38 | 92 | 41 | 48 | 19 | 58 | — | 2 | 10 | — | 4 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 253 | 293 | 212 | 256 | 256 | 574 | 329 | 381 | 259 | 253 | 290 | 242 | 242 | 334 | 174 | 256 | 256 | 221 | 283 | 283 | 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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