Surf Forecasts:
Bunatrahir Bay surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 4AM (local time) - 5.5ft (1.7m), 12s period, NW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 1PM (local time) - 8ft (2.5m), 8s period, N swell with 865 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 10AM (local time) - 2.5ft (0.7m), 7s period with NW 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 Sunday (Aug 23) at 10AM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.3m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Bunatrahir Bay in the next 16 days are 2.5m 8s and forecast to arrive on Thursday (Aug 20) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Aug 25) at 1AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 23rd Aug) | 2.5ft (0.7m) 7s |
| Best Surf | 4AM (Mon 24th Aug) | 5.5ft (1.7m) 12s |
| Most Powerful | 1PM (Thu 20th Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Bunatrahir Bay over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu morning. Very mild (max 15°C on Sat morning, min 13°C on Thu night). Winds decreasing (fresh winds from the N on Thu morning, light winds from the WSW by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 13°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the ESE by Tue morning). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | N 9 | N 8 | N 7 | N 6 | N 6 | NNE 6 | WSW 9 | N 9 | NNE 9 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | WSW 8 | N 11 | W 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1165 | 681 | 340 | 233 | 173 | 58 | 28 | 40 | 27 | 46 | 54 | 428 | 698 | 533 | 301 | 127 | 94 | 68 | 82 | 279 | 293 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross-off | cross-off | on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:37AM2.47m | 00:03AM2.30m | 12:48PM2.33m | 1:29AM2.14m | 2:24PM2.32m | 3:08AM2.17m | 3:45PM2.48m | 4:15AM2.32m | 4:39PM2.71m | 5:00AM2.50m | 5:18PM2.96m | 5:36AM2.69m | 5:52PM3.19m | ||||||||
Low Tide | 5:43PM1.17m | 6:10AM1.23m | 7:15PM1.33m | 7:45AM1.32m | 9:02PM1.29m | 9:15AM1.23m | 10:12PM1.12m | 10:13AM1.03m | 10:57PM0.91m | 10:55AM0.81m | 11:34PM0.69m | 11:30AM0.61m | 00:06AM0.49m | ||||||||
 |  |  |  | |  |  | |  | | | | | | | |  | | | | | |
 | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:58 | — | — | 8:55 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:45 | — | — | 8:44 | — |
mm | 1 | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — |
Temp °C | 14 | 14 | 13 | 13 | 14 | 13 | 15 | 15 | 14 | 16 | 17 | 15 | 17 | 20 | 17 | 19 | 20 | 19 | 17 | 17 | 17 |
Feels °C | 8 | 7 | 8 | 8 | 9 | 9 | 13 | 12 | 13 | 15 | 15 | 15 | 13 | 16 | 14 | 13 | 17 | 17 | 15 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 9 | WNW 8 | WNW 8 | WSW 8 | WNW 6 | N 5 | N 9 | NNE 9 | NW 7 | NW 7 | NW 10 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | WSW 8 | WSW 8 | W 10 | W 9 |
| kJ | 273 | 173 | 125 | 34 | 24 | 20 | 28 | 40 | 27 | 46 | 54 | 428 | 698 | 533 | 301 | 127 | 94 | 68 | 44 | 279 | 293 |
Swell 2 Height (m) Direction Period (s) | W 16 | SW 15 | SW 15 | WSW 9 | WNW 8 | WSW 10 | WSW 9 | WSW 9 | NNW 5 | WNW 9 | WNW 8 | WSW 9 | N 8 | W 14 | NW 12 | NW 10 | NW 9 | N 11 | N 11 | N 10 | N 10 |
| kJ | 5 | 9 | 8 | 16 | 11 | 31 | 26 | 26 | 5 | 15 | 12 | 17 | 1 | 4 | 89 | 49 | 41 | 39 | 82 | 75 | 69 |
Swell 3 Height (m) Direction Period (s) | — | — | W 18 | SW 17 | SW 16 | WNW 7 | SW 16 | SW 15 | WNW 6 | WSW 9 | NW 11 | NNE 8 | SW 14 | — | N 8 | N 13 | N 12 | ENE 6 | WNW 7 | NNE 5 | NNE 5 |
| kJ | — | — | 6 | 12 | 10 | 5 | 10 | 9 | 7 | 15 | 18 | 7 | 8 | — | 1 | 3 | 12 | 6 | 18 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | N 9 | N 8 | N 7 | N 6 | N 6 | NNE 6 | NW 6 | WNW 6 | — | — | — | — | SE 3 | E 3 | SE 3 | E 3 | E 3 | — | ESE 3 | — | — |
| kJ | 1165 | 681 | 340 | 233 | 173 | 58 | 17 | 14 | — | — | — | — | 1 | 1 | 6 | 6 | 3 | — | 2 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 425 | 1080 | 151 | 300 | 300 | 58 | 60 | 243 | 58 | 0 | 20 | 0 | 20 | 20 | 0 | 225 | 156 | 0 | 50 | 49 | 20 |
Best forecast wave conditions in Mayo and Achill Island | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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