Surf Forecasts:
Rhosneigr surf forecast from 15 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 10AM (local time) - 5.5ft (1.7m), 6s period, WSW swell with 201 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 Thursday (Aug 20) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Friday (Aug 21) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Thu 20th Aug) | 5.5ft (1.7m) 6s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Well, mate, I’ve had a proper look at the next 16 days for Rhosneigr and, to be honest, it’s a pretty grim run. The water temperature is sitting at 18° right now, which is much warmer than normal for this time of year, but that’s about the only thing that’s doing us any favours. The swell is tiny, the wind is all over the shop, and the wave energy is flat to weak. Let’s break it down, because there’s not much to get excited about.
Starting from Friday the 14th through to the end of the first week, we’re looking at a real dry spell. Friday afternoon sees a tiny 1.0 ft SW swell with a short 5-second period and a combined energy of just 3, so barely a ripple. The wind is cross-off from the north, which keeps it clean, but the waves are practically non-existent. Saturday the 15th and Sunday the 16th are even worse – Saturday morning drops to 0.3 ft, and Sunday is a total flat spell with glassy conditions but zero swell. Monday the 17th and Tuesday the 18th try to bump up a bit, with 1 ft and 2 ft SW swells, but the period stays short (4 to 6 seconds) and the energy is still weak, ranging from 7 to 39. The winds are mostly cross-on or onshore, so the surf is messy and poor. Wednesday the 19th sees the biggest push for the week – 5 ft from the WSW with a 5-second period and moderate energy of 115 during the morning. But the wind is howling from the west at 35 km/h, making it a fresh cross-onshore, lumpy mess. That’s not paddle-friendly; it’s more of a kite-surfing setup if you’re into that. Thursday the 20th drops back to 1 ft, and the rest of the week is a washout with tiny waves and poor conditions.
Now, there’s a gap from around the 21st to the 24th of August where the swell is barely a ripple – 0.3 ft at best, with long periods of 13 to 15 seconds, but almost no energy (7 to 11). The winds are often offshore or glassy, so it’s clean, but there’s just nothing to ride. Then on the 25th, Tuesday afternoon, things perk up a little. We get a 3 ft SSW swell with a 6-second period, and the combined energy climbs to 84 – still weak, but at least the waves are surfable. The wind is cross-off from the NNW at 15 km/h, keeping it clean. This is honestly the only standout in the whole 16-day window, but it’s a long way off.
After that, the surf drops back into poor territory from the 26th onwards, with mostly small, onshore slop and no real energy. The 29th has a 0.3 ft, 18-second period swell, but it’s a ghost – all period and no height.
So, if you’re itching for a paddle, the 25th afternoon is your best bet, but don’t expect much. The rest is a write-off. For a spot that’s usually fairly consistent, this is a tough stretch, but it’ll turn around eventually. Hang tight.
Rusty
Short Range ForecastMostly dry. Very mild (max 16°C on Fri night, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Mon night. Very mild (max 18°C on Mon night, min 14°C on Tue night). Winds increasing (light winds from the WSW on Tue afternoon, fresh winds from the W by Wed night). | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 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) | W 8 | SW 6 | SW 6 | — | SW 2 | SW 3 | NW 3 | SW 5 | SSW 4 | SW 4 | SW 6 | SW 4 | W 4 | SW 5 | W 5 | WSW 6 | WSW 5 | SW 6 | SW 5 | SW 13 | SW 13 |
Wave Graph | |||||||||||||||||||||
1 | 1 | 1 | 0 | 1 | 3 | 3 | 4 | 34 | 15 | 16 | 10 | 38 | 92 | 142 | 201 | 90 | 19 | 7 | 7 | 7 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | glassy | on | cross-on | cross | on | on | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross-off | cross-off | cross | off |
High Tide | 11:46AM4.02m | 00:00AM4.50m | 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 | ||||||||
Low Tide | 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 | 8:54AM0.92m | 9:10PM1.10m | 9:40AM1.27m | 10:08PM1.38m | 10:45AM1.54m | 11:34PM1.55m | |||||||
5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | |
— | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:32 | — | |
mm | — | — | — | — | — | — | — | — | 10 | — | — | 9 | — | — | 1 | 2 | 1 | — | — | — | — |
Temp °C | 15 | 16 | 15 | 15 | 15 | 15 | 15 | 16 | 18 | 16 | 17 | 16 | 15 | 16 | 16 | 15 | 16 | 15 | 14 | 15 | 14 |
Feels °C | 11 | 13 | 13 | 14 | 12 | 12 | 14 | 13 | 18 | 13 | 15 | 14 | 11 | 12 | 11 | 9 | 11 | 12 | 10 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 6 | N 4 | — | — | — | SW 4 | NW 3 | — | SW 4 | SW 6 | — | SW 16 | SW 15 | SW 16 | SW 15 | SW 14 | SW 6 | SW 5 | N 5 | SW 13 |
1 | 1 | 1 | — | — | — | 2 | 3 | — | 15 | 16 | — | 10 | 9 | 10 | 8 | 8 | 19 | 5 | 20 | 7 | |
Swell 2 Height (m) Direction Period (s) | W 8 | — | SW 6 | — | — | — | — | SW 5 | — | SW 7 | NW 4 | — | — | — | — | — | — | SW 14 | SW 14 | SW 5 | SW 4 |
1 | — | 1 | — | — | — | — | 4 | — | 2 | 8 | — | — | — | — | — | — | 8 | 7 | 1 | 1 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | S 17 | — | — | — | — | — | — | — | SW 13 | — |
— | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — | 7 | — | |
Wind waves Height (m) Direction Period (s) | N 4 | N 4 | — | — | SW 2 | SW 3 | NW 3 | — | SSW 4 | NW 3 | — | SW 4 | W 4 | SW 5 | W 5 | WSW 6 | WSW 5 | NNW 5 | NNW 6 | WNW 4 | N 5 |
13 | 8 | — | — | 1 | 3 | 3 | — | 34 | 5 | — | 10 | 38 | 92 | 142 | 201 | 90 | 66 | 55 | 2 | 27 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 331 | 444 | 259 | 253 | 283 | 212 | 256 | 262 | 392 | 329 | 381 | 221 | 259 | 520 | 259 | 242 | 508 | 174 | 53 | 256 | 211 |
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.










