Valley Left surfForecast / Mayo and Achill Island / Ireland

information circle12 Day Weather and Surf, issued 11 pm Wednesday 11 Mar 2026 IST
Forecast update in hr  min  s Forecast update imminent
Valley Left surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Valley Left sea temperature is
8.7° C
(Which is slightly cooler than normal)

Best Forecast Surf Conditions for Valley Left this week:

The surf forecast for Valley Left over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Mar 17) at 3PM. The primary swell is predicted to be 6.0m and 17s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Valley Left in the next 12 days are 7.5m 19s and forecast to arrive on Sunday (Mar 15) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 9.0m 16s period and expected on Friday (Mar 13) at 12AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Tue 17th Mar)20ft (6.0m) 17s
Best Surf 3PM (Tue 17th Mar)20ft (6.0m) 17s
Most Powerful 9PM (Sun 15th Mar)25ft (7.5m) 19s

Table - best surf conditions forecast for Valley Left over the next 12 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 44mm), heaviest during Thu night. Very mild (max 10°C on Wed night, min 4°C on Thu night). Winds decreasing (gales from the WSW on Thu night, moderate winds from the WSW by Sat afternoon).

Days 3-6 Weather Summary Heavy rain (total 25mm), heaviest during Mon night. Very mild (max 10°C on Sat night, min 6°C on Sun afternoon). Winds decreasing (near gales from the S on Mon night, calm by Tue afternoon).

Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wed
18
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
2
2
2
2
0
0
7
2
2
0
0
6
4
1
3
Swell
Height Map
Wave Height (m) & direction (?)
1
NNW
6.5
W
7
W
9
W
7
W
6
W
6
WNW
5
WNW
4
WNW
3
WNW
4
WNW
5.5
WNW
7.5
WNW
6
WNW
5
WNW
4.5
WNW
5
WNW
6
WNW
5
WNW
4.5
WNW
4.5
WNW
Period(s) (?)111415161615141312131012181716151417171616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)24200000132417907505829403092793337727196371269596580209441435694629344
Wind
(km/h)
50
SSW
30
SW
50
WSW
65
WSW
35
W
35
NW
30
WNW
25
WSW
20
W
30
SSW
45
W
50
W
35
WSW
45
SSW
45
SSW
55
S
25
WNW
5
WSW
10
NE
15
NNE
10
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
crosscross-
on
crosscross-
off
crossoffcrosscrosscross-
off
offoffoffcrossglasscross-
on
cross-
on
on
High Tide
/ height (m)
10:57PM
2.26
11:45AM
1.99
12:48AM
2.21
1:49PM
2.01
2:24AM
2.37
3:03PM
2.18
3:19AM
2.63
3:48PM
2.41
3:57AM
2.90
4:24PM
2.65
4:31AM
3.16
4:58PM
2.87
5:04AM
3.38
5:31PM
3.07
Low Tide
/ height (m)
5:30AM
1.39
5:54PM
1.41
7:49AM
1.36
7:54PM
1.32
9:03AM
1.14
8:58PM
1.10
9:46AM
0.86
9:40PM
0.85
10:19AM
0.56
10:15PM
0.61
10:50AM
0.28
10:49PM
0.39
11:21AM
0.04
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wed
18
Sunrise-7:03--7:00--6:58--6:54--6:52--6:50--6:48-
Sunset--6:37--6:38--6:39--6:42--6:44--6:45--6:47
light rain
heavy rain
light rain
heavy rain
rain showers
thunderstorm
rain showers
rain showers
part cloud
light rain
part cloud
light rain
light rain
light rain
cloud
heavy rain
light rain
cloud
cloud
light rain
light rain
Rain (mm)
3113153252-5-224-111--23
Temp. °C1077688789107789101077645
Feels °C (?)-11-4-40-1-2233-4-4-1-110143-12
  • 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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Information about the Valley Left Surf forecast

The above surf forecast table for Valley Left provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Valley Left can be found by selecting the local surf guide option on the grey menu. Our Valley Left 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 (Valley Left) 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 Valley Left 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.

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