Harlech surfForecast / Wales – Mid / UK

information circle48hr Weather and Surf, issued 12 pm Monday 18 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 1.5°C warmer than normal for this time of year)

How big are the waves at Harlech today?

The current surf forecast for Harlech at 6PM is: 0.4m 6s primary swell from a Southwest direction and 0.5m 4s secondary swell from a Southwest direction (forecast issued at 12:00pm May 18). The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (18 May)2.5ft (0.7m)7s
Afternoon (18 May)2ft (0.6m)7s
Evening (18 May)2.5ft (0.7m)4s

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 23mm), heaviest during Tue morning. Very mild (max 13°C on Tue afternoon, min 10°C on Mon morning). Winds increasing (light winds from the SW on Mon morning, fresh winds from the SW by Tue night).

Mon
18
Tuesday
19
Wednesday
20
Thu
21
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
1 AM
4 AM
7 AM
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
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.7
WSW
7
0.7
WSW
7
0.6
SW
7
0.4
SW
6
0.7
SSW
4
0.7
SW
6
0.8
SW
6
1.1
SW
7
1.1
SW
7
1.3
SW
7
1.5
SW
6
1.7
SW
7
1.8
SW
8
1.9
SW
8
1.8
SW
8
1.6
WSW
9
1.5
WSW
6
1.6
SW
6
1.6
SW
6
1.4
SW
6
1.1
SW
7
1
SW
6
0.9
SW
5
1
SW
6
Wave Graph
Metric surfscale
Energy kJ
48
40
35
10
16
33
49
121
118
174
172
295
359
473
388
386
143
165
182
162
111
73
43
69
Wind (km/h)
15
SW
15
SSW
20
SSW
15
S
20
SSE
25
SSE
25
SSE
25
SSW
25
S
30
SSW
35
SW
35
SW
35
SSW
40
SW
30
SW
25
WSW
25
SW
30
SW
25
SW
25
SSW
20
S
20
S
20
S
20
S
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-off
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
High Tide
9:43AM4.65m
10:04PM4.70m
10:30AM4.48m
10:50PM4.58m
11:18AM4.19m
11:39PM4.36m
Low Tide
4:50PM0.36m
5:19AM0.23m
5:40PM0.52m
6:13AM0.33m
6:32PM0.71m
light rain
part cloud
cloud
light rain
light rain
light rain
light rain
light rain
light rain
rain showers
rain showers
rain showers
light rain
light rain
rain showers
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
light rain
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:15
5:13
5:11
5:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:10
9:13
9:14
9:15
1
1
2
2
2
2
2
3
1
1
1
1
1
1
1
1
Temp °C
10
11
11
11
10
11
11
12
12
12
13
12
11
11
11
11
12
12
13
13
12
12
12
13
6
7
7
8
6
6
7
7
8
6
7
5
4
4
5
6
7
7
9
9
9
9
8
10
Swell 1
Height (m)
Direction
Period (s)
0.7
WSW
7
0.7
WSW
7
0.4
SW
6
0.4
SW
6
0.7
SW
6
0.8
SW
6
0.3
WSW
10
0.3
WSW
10
0.4
SW
9
0.8
WSW
6
Energy kJ
48
40
10
9
33
49
22
20
19
45
Swell 2
Height (m)
Direction
Period (s)
0.3
NW
4
0.3
WSW
12
0.2
WSW
11
0.2
WSW
11
Energy kJ
2
26
13
13
Swell 3
Height (m)
Direction
Period (s)
Energy kJ
Wind waves
Height (m)
Direction
Period (s)
0.6
SW
7
0.5
SW
4
0.7
SSW
4
0.5
SE
3
0.6
SSE
4
1.1
SW
7
1.1
SW
7
1.3
SW
7
1.5
SW
6
1.7
SW
7
1.8
SW
8
1.9
SW
8
1.8
SW
8
1.6
WSW
9
1.5
WSW
6
1.6
SW
6
1.6
SW
6
1.4
SW
6
1.1
SW
7
1
SW
6
0.9
SW
5
1
SW
6
Energy kJ
35
6
16
4
10
121
118
174
172
295
359
473
388
386
143
165
182
162
111
73
43
69
Nearest Offshore or Glassy
Rating
(10 max)
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
1
3
4
1
1
1
1
Distance (km)
278
305
308
308
308
299
329
308
355
344
344
284
284
285
303
309
351
495
337
263
40
61
207
181
Best forecast wave conditions in Mid Wales
Rating
(10 max)
1
1
Best forecast wave conditions in United Kingdom
Rating
(10 max)
3
3
2
2
2
2
2
2
1
1
2
2
3
2
1
2
2
2
4
3
3
3
3
Header Global
Rating
(10 max)
4
4
4
5
4
4
4
4
4
4
4
4
4
4
5
5
4
4
4
5
5
5
4
5
  • 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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