- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Valley Left surfForecast / Mayo and Achill Island / Ireland
12 Day Weather and Surf, issued 6 pm Monday 15 Sep 2025 IST
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 Thursday (Sep 18) at 7AM. The primary swell is predicted to be 2.1m and 11s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Valley Left in the next 12 days are 3.0m 13s and forecast to arrive on Sunday (Sep 21) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.5m 14s period and expected on Wednesday (Sep 17) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 18th Sep) | 7ft (2.1m) 11s |
| Best Surf | 7AM (Thu 18th Sep) | 7ft (2.1m) 11s |
| Most Powerful | 10PM (Sun 21st Sep) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Valley Left over the next 12 days.
Short Range Forecast Heavy rain (total 23mm), heaviest during Tue night. Very mild (max 16°C on Tue night, min 12°C on Tue night). Winds decreasing (near gales from the SW on Wed morning, light winds from the SE by Thu morning). | Days 3-6 Weather Summary Moderate rain (total 14mm), heaviest on Thu afternoon. Very mild (max 16°C on Thu afternoon, min 10°C on Sat night). Winds increasing (moderate winds from the SSW on Thu afternoon, strong winds from the N by Sat morning). | ||||||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 10 | 10 | 9 | 11 | 14 | 12 | 10 | 9 | 13 | 12 | 11 | 10 | 10 | 10 | 9 | 8 | 8 | 13 | 3 | ||
Wave (?)Graph  | |||||||||||||||||||||||
| Energy (?) | 0 | 0 | 20 | 0 | 0 | 0 | 0 | 0 | 586 | 375 | 867 | 701 | 512 | 0 | 2386 | 0 | 980 | 654 | 705 | 2767 | 3 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | cross- off | off | off | cross- off | on | on | on | on | on | on | on | ||
High Tide / height (m) | 1:29AM 2.25 | 2:04PM 2.58 | 3:09AM 2.30 | 3:28PM 2.76 | 4:18AM 2.48 | 4:27PM 3.00 | 5:05AM 2.67 | 5:12PM 3.20 | 5:43AM 2.83 | 5:49PM 3.34 | 6:16AM 2.97 | 6:22PM 3.41 | 6:47AM 3.06 | ||||||||||
Low Tide / height (m) | 7:05PM 1.01 | 7:31AM 1.19 | 8:55PM 0.92 | 9:06AM 1.08 | 10:08PM 0.69 | 10:09AM 0.87 | 10:57PM 0.46 | 10:55AM 0.65 | 11:35PM 0.27 | 11:32AM 0.46 | 12:07AM 0.14 | 12:06PM 0.33 | 12:36AM 0.08 | 12:38PM 0.26 | |||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| Sunrise | - | - | 7:13 | - | - | 7:15 | - | - | 7:16 | - | - | 7:18 | - | - | 7:20 | - | - | 7:22 | - | - | 7:24 | ||
| Sunset | 7:57 | - | - | 7:53 | - | - | 7:52 | - | - | 7:49 | - | - | 7:46 | - | - | 7:45 | - | - | 7:42 | - | - | ||
 |  | |  | |  | |  | |  | |  | | | | | | | | | | |||
Rain (mm) | 2 | 1 | 1 | - | 19 | - | - | - | - | 5 | - | - | 2 | 4 | 1 | - | 2 | - | - | - | - | ||
| Temp. °C | 14 | 13 | 14 | 14 | 16 | 15 | 14 | 14 | 14 | 16 | 15 | 15 | 14 | 13 | 12 | 11 | 11 | 11 | 12 | 12 | 12 | ||
| Feels °C (?) | 5 | 5 | 11 | 11 | 9 | 6 | 5 | 7 | 12 | 11 | 10 | 8 | 6 | 6 | 2 | 1 | 2 | 3 | 5 | 6 | 8 | ||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Mayo and Achill Island
Still cross-shore at Valley Left (fresh winds from the W at Belmullet 23 km from Valley Left). No surfable waves
23 km away, 1 h 4 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Valley Left surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest