Valley Left surfForecast / Mayo and Achill Island / Ireland

information circle12 Day Weather and Surf, issued 5 am Friday 09 Jan 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
9.5° 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 Saturday (Jan 10) at 9AM. The primary swell is predicted to be 3.5m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Valley Left in the next 12 days are 4.0m 13s and forecast to arrive on Monday (Jan 12) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.5m 12s period and expected on Monday (Jan 12) at 12AM.

Wave TypeTime (IST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sat 10th Jan)11ft (3.5m) 12s
Best Surf 9PM (Mon 12th Jan)11ft (3.5m) 13s
Most Powerful 3PM (Mon 12th Jan)13ft (4.0m) 13s

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 35mm), heaviest during Sat afternoon. Very mild (max 12°C on Sun afternoon, min 6°C on Fri morning). Winds increasing (light winds from the WSW on Sat morning, gales from the SW by Sun night).

Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Wed night. Mild temperatures (max 9°C on Mon afternoon, min 5°C on Wed afternoon). Winds increasing (calm on Mon night, fresh winds from the WNW by Wed night).

Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
3
0
0
0
0
0
0
1
3
0
0
0
2
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.5
WNW
1.3
WNW
4.5
W
3.5
WNW
2.3
WNW
0.4
NNW
0.2
NNW
3.5
SW
5.5
WSW
1.4
NW
4
NW
3.5
NNW
3
NW
3
NW
4
NW
2.5
NW
1.8
NW
1.3
NNW
0.9
NNW
0.7
NNW
4.5
W
Period(s) (?)12121312119810121313131212111111109816
Wave
Graph
(?)Metric surfscale
Energy kJ (?)045103208115032600732615636152272271937321656712320127640
Wind
(km/h)
15
W
20
W
20
NNW
15
WSW
35
S
55
S
40
S
45
SSE
75
SW
30
W
15
NW
0
S
25
NNW
25
NNW
15
NW
10
SSW
25
SSE
15
ESE
30
WNW
25
WNW
5
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
on
cross-
off
offoffoffoffcross-
off
crosscross-
on
glassononcross-
on
offcross-
off
cross-
off
cross-
on
crossglass
High Tide
/ height (m)
9:37AM
3.07
10:15PM
2.41
10:24AM
2.79
11:08PM
2.32
11:17AM
2.54
12:10AM
2.28
12:22PM
2.35
1:21AM
2.31
1:38PM
2.27
2:29AM
2.41
2:49PM
2.31
3:26AM
2.57
3:45PM
2.42
Low Tide
/ height (m)
4:04PM
0.59
3:55AM
0.90
4:52PM
0.79
4:53AM
1.10
5:48PM
0.96
6:08AM
1.23
6:52PM
1.06
7:32AM
1.25
8:00PM
1.07
8:45AM
1.17
8:58PM
1.01
9:41AM
1.02
9:47PM
0.88
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Sunrise8:55--8:55--8:53--8:52--8:52--8:51--8:49--
Sunset-4:37--4:38--4:40--4:42--4:44--4:45--4:46-
rain showers
rain showers
rain showers
cloud
mod rain
mod rain
light rain
mod rain
rain showers
light rain
clear
cloud
part cloud
part cloud
rain showers
cloud
cloud
light rain
light rain
clear
part cloud
Rain (mm)
131-693932----1--33--
Temp. °C7789810111210898777667887
Feels °C (?)1-213-2034-51560-1210-1112
  • 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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