Using Surf-Forecast’s Historical Surf Data To Find The Cleanest Waves On Earth
Our historical stats breakdown what waves are offshore almost all the time.
- Forecast
- Maps
- Live
- Weather State
- Spot Information
Bunatrahir Bay Surf Forecast
/ Mayo and Achill Island (14 surf breaks) /
Surf Forecasts:
Bunatrahir Bay surfForecast / Mayo and Achill Island / Ireland
12 Day Weather and Surf, issued 5 pm Wednesday 21 Jan 2026 ISTForecast update in hr min s Forecast update imminent
Bunatrahir Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Bunatrahir Bay sea temperature is
9.3° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Bunatrahir Bay this week:
The surf forecast for Bunatrahir Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jan 22) at 12AM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 0.8m and 16s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Bunatrahir Bay in the next 12 days are 6.0m 19s and forecast to arrive on Tuesday (Jan 27) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 6s period and expected on Saturday (Jan 24) at 9AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 22nd Jan) | 5ft (1.5m) 11s |
| Best Surf | 9AM (Thu 22nd Jan) | 11ft (3.5m) 15s |
| Most Powerful | 6PM (Tue 27th Jan) | 20ft (6.0m) 19s |
Table - best surf conditions forecast for Bunatrahir Bay over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 17mm), heaviest on Wed night. Mild temperatures (max 7°C on Wed afternoon, min 5°C on Thu night). Winds increasing (light winds from the SSW on Thu night, near gales from the E by Fri night). | Days 3-6 Weather Summary Heavy rain (total 26mm), heaviest during Mon afternoon. Mild temperatures (max 7°C on Sat afternoon, min 4°C on Sat night). Winds decreasing (strong winds from the SE on Sat afternoon, light winds from the S by Mon night). | ||||||||||||||||||||||
Wed 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | |||||||||||||||||
| 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 | 11 | 15 | 14 | 13 | 12 | 15 | 15 | 18 | 16 | 16 | 13 | 13 | 12 | 11 | 14 | 15 | 16 | 19 | 18 | 16 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 1045 | 586 | 5735 | 4775 | 2466 | 1048 | 1568 | 4166 | 2711 | 5896 | 3981 | 1866 | 1650 | 1691 | 1193 | 2885 | 8101 | 8749 | 23175 | 17409 | 11591 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | off | off | off | cross- off | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross | cross- off | off | off | ||
High Tide / height (m) | 7:26PM 2.94 | 7:43AM 3.51 | 8:03PM 2.91 | 8:18AM 3.45 | 8:42PM 2.84 | 8:56AM 3.32 | 9:25PM 2.75 | 9:39AM 3.13 | 10:16PM 2.65 | 10:33AM 2.91 | 11:20PM 2.56 | 11:43AM 2.70 | 12:39AM 2.54 | ||||||||||
Low Tide / height (m) | 1:16AM 0.30 | 1:56PM 0.31 | 1:50AM 0.37 | 2:32PM 0.34 | 2:28AM 0.49 | 3:12PM 0.43 | 3:11AM 0.65 | 3:58PM 0.57 | 4:04AM 0.83 | 4:55PM 0.74 | 5:14AM 0.99 | 6:08PM 0.87 | 6:48AM 1.04 | ||||||||||
Wed 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | |||||||||||||||||
| Sunrise | - | - | 8:41 | - | - | 8:40 | - | - | 8:38 | - | - | 8:37 | - | - | 8:36 | - | - | 8:33 | - | - | 8:33 | ||
| Sunset | 4:53 | - | - | 4:55 | - | - | 4:58 | - | - | 5:00 | - | - | 5:01 | - | - | 5:04 | - | - | 5:06 | - | - | ||
 |  |  | |  |  | |  | | | | |  | | |  | | |  | | | |||
Rain (mm) | 5 | 8 | - | - | - | - | - | 2 | 2 | 1 | 2 | - | 2 | 4 | 3 | 11 | - | 3 | 2 | 5 | 5 | ||
| Temp. °C | 7 | 7 | 7 | 7 | 6 | 6 | 7 | 7 | 7 | 7 | 6 | 5 | 6 | 6 | 6 | 7 | 6 | 7 | 7 | 5 | 8 | ||
| Feels °C (?) | 2 | 5 | 4 | 4 | 4 | -1 | -2 | -4 | -3 | -4 | -1 | 0 | 1 | 1 | -2 | 1 | 1 | 2 | 2 | 0 | 3 | ||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
The World’s Most Inconsistent Waves
Huntington, Dribbleton, Virginia, Holland and the Superbank! We recently had a look at the world’s most consistent waves. This was based on the combination of swells and wind directed at 7,000 surf spots, as compiled from our data since 2006. Those stats, represented in easy-to-read graphics, are located under each wave’s spot guides, with historical swell and wind breakdowns available by month, season, and year. There is also an offshore filter, which shows how often the swells come with clean
Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Read more
Discover more articles and updates in the Greenroom.
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 Bunatrahir Bay 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 Bunatrahir Bay Surf forecast
The above surf forecast table for Bunatrahir Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Bunatrahir Bay can be found by selecting the local surf guide option on the grey menu. Our Bunatrahir Bay 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 (Bunatrahir Bay) 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 Bunatrahir Bay 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.
Are you planning a holiday in Mayo and Achill Island? If you are looking for accommodation near Bunatrahir Bay, camping, hotels and holiday cottages in Mayo and Achill Island, consider staying in Ballina which is 24 km (15 miles) away. Other places in and around Mayo and Achill Island where you can find information about places to rent, and car hire include Belmullet which is 41 km (25 miles) away, Westport, Sligo and Claremorris.
Nearest