Harlech surfForecast / Wales – Mid / UK

information circle48hr Weather and Surf, issued 12 am Sunday 17 May 2026 BST
Forecast update in hr  min  s Forecast update imminent
Harlech surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Harlech sea temperature is
12.4° C
(Which is 1.6°C warmer than normal for this time of year)

How big are the waves at Harlech today?

The current surf forecast for Harlech at 3AM is: 0.8m 4s primary swell from a West direction (forecast issued at 12:00am May 17). The wind direction is predicted to be onshore.

Time (BST) & DateWave HeightWave Period
Morning (17 May)2.5ft (0.8m)5s
Afternoon (17 May)3ft (0.9m)4s
Evening (17 May)3.5ft (1.0m)5s

Table - waves today at Harlech. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 21mm), heaviest during Sun night. Very mild (max 12°C on Tue morning, min 8°C on Sat night). Winds increasing (calm on Sun night, fresh winds from the SW by Tue afternoon).

Sunday
17
Monday
18
Tuesday
19
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.8
W
4
0.8
W
4
0.8
W
5
0.8
WSW
5
0.8
WSW
4
0.9
WSW
4
1.1
SW
5
0.9
WSW
6
0.8
WSW
6
0.8
WSW
6
0.6
WSW
6
0.6
WSW
6
0.5
WSW
6
0.4
WSW
6
0.4
SW
6
0.4
SW
6
0.2
WSW
6
0.3
SW
4
0.5
SW
5
0.9
SW
6
1.3
SW
6
1.7
SW
7
1.7
SW
7
1.5
SW
7
Wave Graph
Metric surfscale
Energy kJ
22
24
27
28
27
32
60
53
39
38
26
31
23
16
9
9
3
3
14
49
111
261
309
242
Wind (km/h)
20
WNW
15
WNW
15
W
15
WSW
25
WSW
20
WSW
20
SW
15
SW
5
WSW
5
WSW
5
ENE
5
SW
10
SW
10
SSW
5
S
15
SSE
15
ESE
20
ESE
20
SSW
25
SSW
30
SW
35
SW
30
SW
30
SW
on
on
on
on
cross-on
cross-on
cross-on
cross-on
on
glassy
glassy
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
cross-on
cross-on
cross-on
High Tide
8:57AM4.68m
9:19PM4.68m
9:43AM4.65m
10:04PM4.70m
10:30AM4.48m
Low Tide
3:37AM0.28m
4:02PM0.26m
4:27AM0.20m
4:50PM0.36m
5:19AM0.23m
5:40PM0.52m
clear
cloud
cloud
rain showers
rain showers
light rain
light rain
rain showers
light rain
light rain
rain showers
part cloud
part cloud
part cloud
cloud
cloud
light rain
light rain
light rain
light rain
rain showers
rain showers
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:15
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:08
9:10
9:13
1
1
1
1
1
1
3
2
1
1
3
2
1
1
Temp °C
9
8
9
10
10
10
9
9
9
8
8
9
10
11
11
10
10
10
11
12
12
12
12
12
5
4
5
6
4
5
4
5
7
7
7
7
7
8
8
6
7
6
7
8
6
6
7
7
Swell 1
Height (m)
Direction
Period (s)
0.4
NW
4
0.8
WSW
6
0.8
WSW
6
0.6
WSW
6
0.6
WSW
6
0.5
WSW
6
0.4
WSW
6
0.4
SW
6
0.4
SW
6
0.2
WSW
6
0.3
SW
4
0.5
SW
5
Energy kJ
7
39
38
26
26
23
16
9
9
3
3
14
Swell 2
Height (m)
Direction
Period (s)
0.1
W
12
0.1
W
12
0.2
WNW
4
0.2
WNW
4
Energy kJ
3
3
1
1
Swell 3
Height (m)
Direction
Period (s)
0.1
W
12
Energy kJ
3
Wind waves
Height (m)
Direction
Period (s)
0.8
W
4
0.8
W
4
0.8
W
5
0.8
WSW
5
0.8
WSW
4
0.9
WSW
4
1.1
SW
5
0.9
WSW
6
0.6
WSW
6
0.2
WNW
4
0.4
SE
3
0.5
SE
3
0.9
SW
6
1.3
SW
6
1.7
SW
7
1.7
SW
7
1.5
SW
7
Energy kJ
22
24
27
28
27
32
60
53
31
1
2
4
49
111
261
309
242
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
Distance (km)
281
281
281
281
142
284
284
284
284
284
284
26
26
26
125
263
308
308
299
329
344
355
351
284
Best forecast wave conditions in Mid Wales
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
2
3
4
3
3
4
4
4
4
4
3
3
3
3
2
2
2
2
2
2
1
2
Header Global
Rating
(10 max)
6
5
4
4
4
6
9
9
7
4
4
5
7
5
4
5
4
4
4
4
5
5
5
4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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