Rhosneigr Surf Break

Lat Long: 53.24° N 4.53° W

Rhosneigr Surf Forecast and Surf Report

Issued: 6 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rhosneigr sea temperature is
18.1° C
2.3° 

Rhosneigr surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Rhosneigr surf forecast from 18 Aug 2026:

  • Most powerful swell: Thursday 20 Aug, 1AM (local time) - 3.5ft (1.1m), 5s period, SW swell with 64 kJ wave energy.

Best Forecast Surf Conditions for Rhosneigr this week:

The most powerful waves expected at Rhosneigr in the next 16 days are 1.1m 5s and forecast to arrive on Thursday (Aug 20) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Friday (Aug 21) at 10PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Thu 20th Aug)3.5ft (1.1m) 5s

Table - best surf conditions forecast for Rhosneigr over the next 16 days.


The Lowdown

Alright, Rusty here. Let's have a look at the forecast for Rhosneigr. It's a grim picture for the next week and a half, so I'll be straight up with you. There's a whole lot of nothing on the cards until the beginning of September.

The water temperature is sitting at 64.6°, which is a solid 4.1° warmer than usual for this time of year. That's pretty weird, but it's about the only thing that's interesting.

We start off with a run of poor conditions. From Tuesday the 18th of August right through to the end of the month, the surf is tiny and the wind is all over the place. There are a few days there with clean conditions and light winds, like the 21st through the 24th, but the swell is next to nothing – just 0.3 ft of weak, long-period energy. Even the glassy conditions on Monday the 24th morning won't make a wave out of nothing. It's a proper flat spell. The combined energy barely registers, with values like 15 and 8 (weak energy), so you're just looking at a lake.

The wind shows some signs of life on the 27th afternoon with a moderate offshore breeze and a clean 1.3 ft swell, but the energy is still very low at 24 (weak). It's a long wait.

Then, hold onto your board. On Tuesday the 1st of September, something finally shows up. We've got a 9.8 ft swell from the SW with a period of 7 seconds. The combined energy jumps to 830 (strong wave energy), and the wind is a clean cross-offshore breeze from the NNW. This is a big chunk of swell, but it's too big for this spot. The forecast even says it's too big for the break, so this is strictly for experts only, and even then, it's a beast. The period is short, so it'll be a bit lumpy and walled up. That afternoon the swell drops to 7.5 ft and the energy is still 438 (strong), but the conditions are still clean. If you're an absolute charger, the Tuesday morning is the standout, but you have been warned.

The rest of the first week of September is messy with onshore winds and dropping swell. The 2nd of September has a 5.9 ft swell from the W, but it's crossed-up and lumpy from a strong SSW wind. Not worth the drive.

So, to wrap it up: the only real window of opportunity is the morning of Tuesday the 1st of September with a massive, clean swell. It's a long-range call, so don't bank on it. Before that, you're better off cleaning the wax off your board.

Short Range Forecast

Moderate rain (total 18mm), heaviest on Tue night. Very mild (max 18°C on Tue afternoon, min 12°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light.

Tue
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
SW
6
0.8
W
4
0.8
WSW
4
0.7
SW
4
1.1
SW
5
0.5
SW
6
0.4
SW
6
0.1
SW
14
0.1
SW
14
0.1
SW
13
0.1
SW
13
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.6
SSW
3
0.7
SW
4
Wave Graph
Metric surfscale
Energy kJ
16
18
24
16
64
18
10
8
7
7
7
8
8
8
8
7
8
8
8
20
Wind (km/h)
15
WSW
20
WSW
20
W
25
SSW
20
W
25
NNE
25
N
15
N
15
NNW
25
NNW
15
N
15
NNW
20
NNW
15
N
15
NNW
15
NW
5
NE
5
SSE
10
W
10
S
Wind State
on
cross-on
cross-on
on
cross-on
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
off
glassy
cross-on
cross-on
High Tide
2:05AM3.58m
2:29PM3.25m
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
Low Tide
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
1:41PM1.46m
2:17AM1.25m
2:33PM1.20m
3:02AM0.96m
cloud
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:05
6:07
6:09
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:39
8:37
8:36
8:32
8:30
8:29
8:27
 mm
5
2
1
6
3
1
Temp °C
18
15
16
17
15
14
15
14
14
15
13
14
14
14
14
16
15
16
17
16
Feels °C
15
12
12
12
13
10
10
11
10
10
9
10
10
11
11
14
14
14
15
15
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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