Surf Forecasts:
Rhosneigr surf forecast from 12 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 10AM (local time) - 5.5ft (1.7m), 6s period, WNW swell with 173 kJ wave energy.
Best Forecast Surf Conditions for Rhosneigr this week:
The most powerful waves expected at Rhosneigr in the next 16 days are 1.7m 6s and forecast to arrive on Wednesday (Aug 19) at 10AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Sunday (Aug 16) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Wed 19th Aug) | 5.5ft (1.7m) 6s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break down what’s happening for the next couple of weeks.
Honestly, it’s a rough start. From now through the morning of the 19th, it’s mostly flat or blown out. Water temp is about 64°, which is a touch warmer than usual for this time of year, but that’s about the only bright spot.
From Wednesday the 12th through Tuesday the 19th morning, swell is tiny – mostly under 2ft – and the wind is often cross-on or onshore, making for choppy, messy conditions. The combined energy is mostly in the single digits or low teens – really weak.
On Wednesday the 19th, we finally see some size. The morning brings 6ft from the WNW with a period of 6 seconds, and the combined energy jumps to 183 – moderate. Wind is onshore though, so it’s lumpy. The afternoon is a bit cleaner with a light cross-on breeze, but still not great.
Thursday the 20th is the real standout. That morning, we get a solid offshore wind from the NE at 16 mph, cleaning things up beautifully. Swell is 6ft from the NW, period 6 seconds, and combined energy is 264 – solid moderate. It’s a marginal call, but with offshore wind and that much size, it’s your best chance. The direction is a bit off the optimum SW, but still, clean waves are clean waves. That afternoon, the swell drops to 4ft, but the wind stays cross-off, so there’s still something to work with.
After that, it’s flat again. The 21st through the 23rd are back to tiny 0.3ft swells with long periods (14-15 seconds) and clean wind, but no power. The combined energy is in the single digits.
Then Monday the 24th morning shows a small pulse: 4ft from the SSW at 7 seconds, with 128 combined energy. The wind is cross-off from the NNW at 9 mph, so it’s clean, but the conditions are described as very ordinary. It’s surfable, but nothing special.
The rest of the run into the 27th is mostly small, cross-shore, or messy. No other real windows.
Mark your calendar for Thursday the 20th morning. That’s your best bet.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 14°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Mon morning. Very mild (max 17°C on Mon afternoon, min 13°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | SW 12 | SW 12 | SW 10 | SW 11 | SW 11 | SW 5 | NW 4 | NW 4 | SSW 6 | SW 6 | SW 6 | SW 6 | NNW 5 | W 7 | W 7 | SSW 2 | S 4 | SSW 5 | SW 6 | SSW 4 | SW 6 |
Wave Graph | |||||||||||||||||||||
6 | 6 | 4 | 5 | 4 | 26 | 7 | 5 | 3 | 1 | 2 | 1 | 0 | 1 | 1 | 1 | 27 | 20 | 10 | 26 | 46 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross-on | on | on |
High Tide | 9:54PM4.35m | 10:25AM4.00m | 10:38PM4.54m | 11:07AM4.05m | 11:19PM4.59m | 11:46AM4.02m | 00:00AM4.50m | 12:25PM3.91m | 00:40AM4.27m | 1:04PM3.73m | 1:21AM3.95m | 1:44PM3.51m | 2:05AM3.58m | ||||||||
Low Tide | 4:20PM0.13m | 4:50AM-0.29m | 5:04PM-0.02m | 5:34AM-0.40m | 5:45PM-0.06m | 6:15AM-0.35m | 6:25PM0.02m | 6:55AM-0.16m | 7:05PM0.20m | 7:34AM0.15m | 7:45PM0.46m | 8:13AM0.53m | 8:25PM0.77m | ||||||||
5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | |
— | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 12 | 1 | 1 | — | — | 14 |
Temp °C | 24 | 27 | 25 | 22 | 22 | 19 | 17 | 17 | 16 | 15 | 16 | 15 | 14 | 16 | 15 | 16 | 17 | 17 | 16 | 18 | 18 |
Feels °C | 21 | 25 | 24 | 20 | 22 | 17 | 16 | 15 | 13 | 10 | 12 | 12 | 10 | 14 | 14 | 14 | 16 | 13 | 12 | 15 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SSW 3 | SW 10 | SW 8 | SW 8 | SW 5 | SW 4 | NW 4 | SSW 6 | SW 6 | SW 6 | SW 6 | — | W 7 | NNW 4 | N 4 | — | SSW 5 | SW 6 | — | SW 6 |
6 | 2 | 4 | 3 | 2 | 26 | 7 | 3 | 3 | 1 | 2 | 1 | — | 1 | 3 | 1 | — | 20 | 10 | — | 46 | |
Swell 2 Height (m) Direction Period (s) | S 6 | SW 12 | — | SW 5 | SW 11 | S 11 | — | SW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
1 | 6 | — | 1 | 4 | 2 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | W 10 | SW 6 | — | SW 11 | S 11 | — | — | N 4 | — | — | — | — | — | — | W 7 | — | — | — | — | — | — |
2 | 1 | — | 5 | 2 | — | — | 2 | — | — | — | — | — | — | 1 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 3 | — | SSW 5 | SW 3 | SSW 2 | SW 5 | NW 4 | NW 4 | N 4 | NNW 4 | NNW 4 | N 4 | NNW 5 | NNW 5 | — | SSW 2 | S 4 | — | — | SSW 4 | WNW 4 |
3 | — | 3 | 1 | 1 | 26 | 6 | 5 | 5 | 21 | 13 | 18 | 31 | 17 | — | 1 | 27 | — | — | 26 | 19 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 230 | 159 | 159 | 175 | 256 | 187 | 189 | 560 | 331 | 615 | 598 | 285 | 285 | 293 | 295 | 299 | 307 | 175 | 298 | 300 | 107 |
Best forecast wave conditions in Anglesy | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










