
Surf Forecasts:
Rhosneigr surf forecast from 16 Sep 2026:
- Most powerful swell: Friday 18 Sep, 4PM (local time) - 8ft (2.5m), 7s period, SW swell with 550 kJ wave energy.
Best Forecast Surf Conditions for Rhosneigr this week:
The most powerful waves expected at Rhosneigr in the next 16 days are 2.5m 7s and forecast to arrive on Friday (Sep 18) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Wednesday (Sep 16) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Fri 18th Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Rhosneigr over the next 16 days.
The Lowdown
Right off the bat, I gotta tell you, it’s looking pretty grim out there. The next week and a half is a write-off for anything you’d want to paddle out into. We’ve got day after day of poor surf conditions, and the swell is either too small, too messy, or the wind is just ruining whatever little push there is. It’s a tough stretch for Rhosneigr.
The first real window where you might even sniff a rideable wave doesn’t come until Tuesday the 29th. Before that, we’re dealing with a whole lot of nothing. Wednesday the 16th starts with a weak 4ft from the northwest at a short period, but that cross-shore breeze is going to chop it right up—not worth your time. The wind stays onshore or cross-onshore through the weekend, and while Friday afternoon the 18th brings in a bigger 8ft from the southwest (550 combined energy), the strong onshore wind and rain are just going to turn it into a messy, blown-out mess. That’s not a surf day, that’s a day to watch from the car park.
Saturday the 19th has a bit of size at 5ft, but the cross-onshore wind keeps it lumpy. Sunday drops off fast to 2ft. By Monday the 21st, we’re down to knee-high dribble with the occasional ripple. The whole stretch from the 16th through the morning of the 29th is basically a blank run—over a week and a half of nothing worth getting wet for.
Now, here’s the tiny light at the end of the tunnel. Tuesday the 29th afternoon, things finally glass off. The wind swings to the north-northeast at nearly zero, leaving the water glassy. We’ve got a clean 4ft from the southwest pushing in, with a combined energy of 136. It’s still pretty ordinary—nothing to call home about—but it’s ridable. Then on Wednesday the 30th, we get a cleaner look with a light cross-offshore from the east, and the swell holds at 3ft from the southwest, period stretching to 8 seconds. That’s the best of the whole window, but honestly, it’s still small.
There’s also a bit of a funky anomaly on Tuesday the 22nd—a long-period 18-second swell showing up, but with zero wave height, it’s just a ghost pulse. Same thing on the 25th, with a 16-second pulse, but nothing attached to it. Just a tease.
Water temp is sitting at 61°F, which is a touch warmer than normal for mid-September. Nothing crazy, but you won’t need the thickest suit just yet.
The 29th and the 30th are your only real chances, and even then, you’re looking at small, clean waves. The offshore wind on the 30th will make it feel better than it is. But don’t get your hopes up for anything hollow—this is a beginner-friendly, soft, crumbly sort of day. If you’re a beginner, that Tuesday afternoon glass could be a good time to get some practice. For the crew looking for a proper wave, this whole 16-day run is a bust.
We finally see a glimmer of hope on the 1st of October, but the swell has dropped out completely—1ft. It’s glassy, but there’s nothing to ride. So, the long story short: sit tight, wait for the 29th, and maybe catch that sunrise session on the 30th. Otherwise, it’s a board-waxing, equipment-maintenance kind of fortnight.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Fri afternoon. Very mild (max 17°C on Fri night, min 13°C on Wed night). Winds increasing (moderate winds from the WSW on Wed afternoon, strong winds from the SSW by Fri afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Mon afternoon, min 13°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 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) | NW 5 | W 4 | SW 5 | W 5 | W 6 | W 5 | WSW 5 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SSW 4 | SW 5 | SW 4 | SSW 4 | S 13 | — | SW 18 | SW 16 |
Wave Graph | |||||||||||||||||||||
84 | 12 | 133 | 152 | 163 | 129 | 74 | 550 | 335 | 247 | 103 | 44 | 18 | 18 | 31 | 5 | 1 | 3 | 0 | 12 | 10 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | cross-off | glassy | cross-on | off |
High Tide | 1:00PM3.60m | 1:24AM3.48m | 1:40PM3.31m | 2:09AM3.11m | 2:30PM3.01m | 3:16AM2.79m | 3:54PM2.78m | 5:10AM2.63m | 5:52PM2.79m | 6:48AM2.73m | 7:09PM3.00m | 7:45AM2.94m | 7:57PM3.28m | ||||||||
Low Tide | 7:49PM0.75m | 8:09AM1.03m | 8:30PM1.08m | 8:52AM1.36m | 9:24PM1.38m | 9:52AM1.62m | 10:46PM1.58m | 11:27AM1.71m | 00:33AM1.54m | 1:01PM1.56m | 1:44AM1.28m | 1:57PM1.28m | 2:29AM0.97m | ||||||||
6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | |
— | 7:31 | — | — | 7:30 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — | — | 7:17 | — | |
mm | — | — | 3 | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 16 | 14 | 15 | 14 | 14 | 16 | 17 | 16 | 16 | 16 | 13 | 15 | 18 | 18 | 19 | 19 | 19 | 19 | 19 |
Feels °C | 8 | 10 | 11 | 6 | 9 | 8 | 8 | 10 | 13 | 12 | 13 | 13 | 12 | 12 | 16 | 17 | 20 | 20 | 19 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 6 | NNW 5 | — | — | — | N 15 | — | — | — | — | SW 7 | SW 7 | NW 4 | NNW 4 | — | SW 4 | — | — | — | SW 18 | SW 16 |
5 | 20 | — | — | — | 4 | — | — | — | — | 103 | 44 | 6 | 1 | — | 4 | — | — | — | 12 | 10 | |
Swell 2 Height (m) Direction Period (s) | SW 11 | — | — | — | — | — | — | — | — | — | — | — | S 14 | S 14 | — | — | — | W 5 | — | S 12 | SW 12 |
5 | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | — | — | — | 1 | — | 3 | 6 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | — | — | NW 4 | SW 5 | S 13 | — | SW 12 | — |
— | — | — | — | — | — | — | — | — | — | — | — | 8 | — | — | 1 | 1 | 3 | — | 6 | — | |
Wind waves Height (m) Direction Period (s) | NW 5 | W 4 | SW 5 | W 5 | W 6 | W 5 | WSW 5 | SW 7 | SW 7 | SW 7 | NW 4 | WNW 4 | SW 6 | SSW 4 | SW 5 | SW 4 | SSW 4 | SSW 3 | — | SW 4 | — |
84 | 12 | 133 | 152 | 163 | 129 | 74 | 550 | 335 | 247 | 9 | 20 | 18 | 18 | 31 | 5 | 1 | 1 | — | 1 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 175 | 259 | 283 | 284 | 543 | 190 | 253 | 257 | 381 | 283 | 46 | 46 | 159 | 253 | 182 | 159 | 180 | 253 | 158 | 152 | 152 |
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.









