Surf Forecasts:
Bunatrahir Bay surf forecast from 14 Sep 2026:
- Best quality surf: Thursday 17 Sep, 7AM (local time) - 11ft (3.5m), 10s period, WNW swell with cross-shore winds.
- Most powerful swell: Thursday 17 Sep, 7PM (local time) - 20ft (6.0m), 14s period, WNW swell with 14,198 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 7AM (local time) - 3.5ft (1.1m), 8s period with WSW swell.
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 Monday (Sep 14) at 7AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.7m and 9s. Another secondary swell of 0.5m and 12s is also forecast. 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 6.0m 14s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Sep 14) at 1PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 14th Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 7AM (Thu 17th Sep) | 11ft (3.5m) 10s |
| Most Powerful | 7PM (Thu 17th Sep) | 20ft (6.0m) 14s |
Table - best surf conditions forecast for Bunatrahir Bay over the next 16 days.
Short Range ForecastLight rain (total 3mm), mostly falling on Mon morning. Very mild (max 18°C on Mon afternoon, min 12°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Very mild (max 15°C on Wed night, min 12°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WSW 8 | WSW 11 | W 10 | W 10 | WNW 9 | WNW 11 | WNW 10 | W 10 | W 9 | WNW 11 | WNW 13 | WNW 14 | WNW 13 | WNW 12 | WNW 11 | WNW 10 | W 10 | WNW 12 | WNW 14 | WNW 14 | WNW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 229 | 749 | 637 | 963 | 901 | 2718 | 1202 | 813 | 1064 | 4275 | 11594 | 11227 | 5859 | 3138 | 1724 | 624 | 1916 | 6342 | 8050 | 6786 | 3744 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross-off | off | cross-off | cross-off |
High Tide | 8:15AM3.28m | 8:29PM3.37m | 8:48AM3.15m | 9:04PM3.08m | 9:21AM2.97m | 9:39PM2.77m | 9:58AM2.76m | 10:19PM2.46m | 10:44AM2.53m | 11:13PM2.20m | 11:55AM2.34m | 00:45AM2.03m | 1:41PM2.30m | 2:39AM2.07m | |||||||
Low Tide | 2:10PM0.20m | 2:33AM0.27m | 2:46PM0.39m | 3:03AM0.51m | 3:23PM0.63m | 3:35AM0.78m | 4:04PM0.91m | 4:13AM1.04m | 4:57PM1.18m | 5:06AM1.27m | 6:30PM1.37m | 6:48AM1.41m | 8:39PM1.33m | ||||||||
 | |  |  |  |  |  |  |  | | | | | | | | | | | | | |
 | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | 7:57 | — | — | 7:54 | — | — | 7:52 | — | — | 7:50 | — | — | 7:46 | — | — | 7:45 | — | — | 7:42 | — |
mm | 1 | 1 | — | — | 1 | — | — | — | 2 | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 |
Temp °C | 17 | 18 | 14 | 15 | 14 | 13 | 14 | 15 | 15 | 13 | 14 | 13 | 14 | 15 | 14 | 14 | 14 | 13 | 11 | 11 | 17 |
Feels °C | 15 | 14 | 11 | 10 | 8 | 8 | 10 | 11 | 10 | 6 | 7 | 8 | 10 | 12 | 10 | 9 | 8 | 9 | 9 | 7 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | N 13 | N 12 | N 11 | N 11 | N 10 | WNW 10 | N 7 | N 9 | N 8 | — | — | WNW 13 | WNW 12 | WNW 11 | WNW 10 | N 9 | — | WNW 14 | WNW 14 | WNW 13 |
| kJ | 229 | 123 | 141 | 123 | 85 | 48 | 1202 | 51 | 14 | 12 | — | — | 5859 | 3138 | 1724 | 624 | 2 | — | 8050 | 6786 | 3744 |
Swell 2 Height (m) Direction Period (s) | N 11 | ESE 4 | N 12 | — | — | — | N 7 | N 8 | — | N 9 | — | — | — | — | — | — | W 16 | — | — | — | — |
| kJ | 64 | 2 | 104 | — | — | — | 131 | 19 | — | 15 | — | — | — | — | — | — | 5 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | WNW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 46 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 4 | WSW 11 | W 10 | W 10 | WNW 9 | WNW 11 | — | W 10 | W 9 | WNW 11 | WNW 13 | WNW 14 | — | — | — | W 9 | W 10 | WNW 12 | — | — | — |
| kJ | 1 | 749 | 637 | 963 | 901 | 2718 | — | 813 | 1064 | 4275 | 11594 | 11227 | — | — | — | 565 | 1916 | 6342 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 26 | 9 | 558 | 736 | 469 | 232 | 9 | 476 | 900 | 736 | 428 | 26 | 42 | 9 | 232 | 232 | 226 | 20 | 20 | 186 |
Best forecast wave conditions in Mayo and Achill Island | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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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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