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Bunatrahir Bay Surf Forecast
/ Mayo and Achill Island (14 surf breaks) /
Surf Forecasts:
Bunatrahir Bay surfForecast / Mayo and Achill Island / Ireland
16 Day Weather and Surf, issued 12 am Monday 18 May 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
11.6° 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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (May 19) at 4AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.3m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Bunatrahir Bay in the next 16 days are 3.0m 14s and forecast to arrive on Wednesday (May 20) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Monday (May 18) at 10PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 19th May) | 3ft (0.9m) 9s |
| Best Surf | 10PM (Wed 20th May) | 6ft (1.9m) 12s |
| Most Powerful | 4AM (Wed 20th May) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Bunatrahir Bay over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 12mm), heaviest on Mon night. Very mild (max 14°C on Wed afternoon, min 7°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the SE by Mon night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Wed night. Very mild (max 18°C on Thu afternoon, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
W 11 | WNW 10 | W 10 | WSW 9 | WSW 9 | WSW 14 | WSW 13 | WSW 12 | W 11 | WSW 10 | WSW 10 | WSW 13 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | W 9 | W 9 | W 8 | W 10 | |
934 | 533 | 192 | 108 | 274 | 2989 | 2574 | 1622 | 663 | 610 | 522 | 1094 | 748 | 504 | 302 | 214 | 157 | 103 | 56 | 35 | 88 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | off | cross-off | cross | glassy | cross-off | on | glassy | |
High Tide | 7:16AM3.41m | 7:40PM3.60m | 8:07AM3.25m | 8:29PM3.56m | 9:00AM3.02m | 9:22PM3.45m | 9:57AM2.76m | 10:20PM3.30m | 11:01AM2.53m | 11:24PM3.15m | 12:13PM2.39m | 00:33AM3.03m | 1:29PM2.37m | 1:42AM2.95m | |||||||
Low Tide | 1:17PM0.05m | 1:50AM0.05m | 2:02PM0.20m | 2:43AM0.17m | 2:49PM0.39m | 3:41AM0.35m | 3:41PM0.60m | 4:48AM0.55m | 4:41PM0.81m | 6:03AM0.69m | 5:53PM0.98m | 7:20AM0.73m | 7:12PM1.05m | ||||||||
 |  |  | | |  |  | | | | | |  | |  |  | |  | | | | |
 | 5:28 | — | — | 5:26 | — | — | 5:26 | — | — | 5:24 | — | — | 5:22 | — | — | 5:20 | — | — | 5:20 | — | — |
 | — | — | 9:38 | — | — | 9:40 | — | — | 9:42 | — | — | 9:44 | — | — | 9:45 | — | — | 9:46 | — | — | 9:49 |
— | 1 | 4 | 3 | 2 | — | 2 | — | 3 | — | 2 | — | — | 1 | 2 | — | — | — | — | — | — | |
Temp °C | 12 | 11 | 11 | 13 | 12 | 11 | 13 | 14 | 14 | 15 | 18 | 15 | 18 | 18 | 14 | 17 | 17 | 14 | 18 | 17 | 17 |
7 | 6 | 7 | 8 | 7 | 7 | 7 | 11 | 11 | 13 | 15 | 13 | 15 | 14 | 13 | 15 | 16 | 14 | 18 | 15 | 16 | |
Swell 1 Height (m) Direction Period (s) | W 11 | WNW 10 | W 10 | WSW 9 | W 16 | WSW 14 | WSW 13 | N 8 | W 11 | WSW 10 | WSW 10 | WSW 13 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | W 9 | W 9 | W 8 | W 10 |
 kJ | 934 | 533 | 192 | 108 | 134 | 2989 | 2574 | 1 | 663 | 610 | 522 | 1094 | 748 | 504 | 302 | 214 | 157 | 103 | 56 | 35 | 88 |
Swell 2 Height (m) Direction Period (s) | NNE 9 | NNE 9 | NNE 9 | WNW 9 | W 13 | NNE 8 | N 8 | N 8 | NW 8 | NW 7 | — | N 9 | N 8 | N 7 | N 6 | W 16 | W 16 | SW 14 | SW 14 | SW 14 | NNE 4 |
| kJ | 16 | 16 | 15 | 33 | 55 | 14 | 5 | 1 | 46 | 12 | — | 1 | 1 | 1 | 1 | 5 | 5 | 8 | 8 | 8 | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | W 15 | W 13 | NNE 8 | — | — | — | N 8 | N 8 | — | N 9 | — | — | N 7 | N 7 | N 7 | — | — | — | WNW 15 |
| kJ | — | — | 17 | 32 | 14 | — | — | — | 1 | 1 | — | 1 | — | — | 1 | 1 | 1 | — | — | — | 21 |
Wind waves Height (m) Direction Period (s) | — | SE 3 | SE 4 | S 4 | WSW 9 | — | — | WSW 12 | S 3 | — | S 3 | SSE 3 | SSE 3 | — | — | — | — | E 6 | — | NNE 2 | — |
| kJ | — | 2 | 32 | 9 | 274 | — | — | 1622 | 5 | — | 2 | 6 | 2 | — | — | — | — | 1 | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 20 | 20 | 0 | 26 | 9 | 555 | 9 | 0 | 0 | 0 | 0 | 0 | 9 | 0 | 0 | 128 | 0 | 58 | 243 | 0 |
Best forecast wave conditions in Mayo and Achill Island | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 16 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.
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