Bunatrahir Bay Surf Forecast

/ Mayo and Achill Island (14 surf breaks) /

Ireland (149 surf breaks) / Lat Long: (54.29° N 9.39° W)

Surf Forecasts:

Bunatrahir Bay surfForecast / Mayo and Achill Island / Ireland

12 Day Weather and Surf, issued 6 pm Tuesday 16 Sep 2025 IST

Forecast 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 15.6° C
(Which is 1.4°C warmer than 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 Wednesday (Sep 17) at 1PM. The primary swell is predicted to be 3.5m and 10s period with a secondary swell of 0.5m 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 12 days are 5.0m 14s and forecast to arrive on Wednesday (Sep 17) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 9s period and expected on Wednesday (Sep 17) at 7AM.

Wave Type	Time (IST) & Date	Wave Height & Period
Next good surf (1 star+)	1PM (Wed 17th Sep)	11ft (3.5m) 10s
Best Surf	1PM (Wed 17th Sep)	11ft (3.5m) 10s
Most Powerful	7PM (Wed 17th Sep)	16ft (5.0m) 14s

Table - best surf conditions forecast for Bunatrahir Bay over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Heavy rain (total 25mm), heaviest during Tue night. Very mild (max 17°C on Thu afternoon, min 12°C on Tue night). Winds decreasing (strong winds from the SW on Wed morning, light winds from the SE by Thu morning).											Days 3-6 Weather Summary Light rain (total 9mm), mostly falling on Fri night. Very mild (max 15°C on Fri afternoon, min 11°C on Sat morning). Winds decreasing (strong winds from the N on Sat afternoon, light winds from the N by Sun night).
	Tue 16		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	3	0	0	!	!	4	3	2	3	1	2	0	0	0	0	0	0	1	1	2	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	W	W	WSW	WSW	W	WNW	WNW	NNW	N	W	WSW	NNW	N	N	N	N	N	N	N	N	WNW
Period(s) (?)	10	10	9	14	12	10	9	13	11	10	10	11	11	10	9	10	10	10	10	9	14
Wave Graph (?)
kJ (?)	936	361	1045	7669	5623	1103	435	1175	836	799	727	858	5766	4402	1279	958	544	325	294	295	336
Wind (km/h)	SW	ESE	SW	SW	SW	SSE	S	SW	SSW	SSW	WSW	N	N	N	N	N	N	NNE	N	NW	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	cross- off	cross- off	cross- off	off	off	cross- off	cross- off	cross- off	cross- off	on	on	on	on	on	on	on	on	glass	glass
High Tide / height (m)		3:09AM 2.37		3:31PM 2.84		4:17AM 2.55	4:30PM 3.10		5:05AM 2.76	5:14PM 3.32		5:43AM 2.94	5:52PM 3.47		6:16AM 3.08	6:25PM 3.54		6:47AM 3.18	6:56PM 3.54		7:16AM 3.23
Low Tide / height (m)		8:56PM 0.95	9:07AM 1.07		10:08PM 0.73	10:09AM 0.85		10:57PM 0.50	10:55AM 0.63		11:35PM 0.31	11:32AM 0.44		12:07AM 0.18	12:06PM 0.31		12:37AM 0.11	12:38PM 0.24		1:04AM 0.10

	Tue 16		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
Sunrise	-	-	7:11	-	-	7:13	-	-	7:16	-	-	7:18	-	-	7:20	-	-	7:20	-	-	7:22
Sunset	7:52	-	-	7:50	-	-	7:46	-	-	7:45	-	-	7:42	-	-	7:39	-	-	7:37	-	-

Rain (mm)	-	22	-	-	-	1	1	1	-	-	1	1	2	2	2	1	-	-	-	-	-
Temp. °C	14	14	15	15	13	13	17	16	15	15	14	12	12	11	11	11	12	12	12	11	11
Feels °C (?)	11	8	7	7	7	11	15	14	10	10	9	4	2	1	3	4	7	9	9	9	9

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

Wind Update The wind is still cross-off at Bunatrahir Bay (light winds from the SSE at Ballina 28 km from Bunatrahir Bay). 1.7m 10s swell from the WNW with a 0.4m 9s swell from the N. 2 swells combining to make bigger set waves.
55 minutes ago Bunatrahir Bay

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28 km away, 55 min ago

11 km/h

SSE

0.0

15.6

Air / Water (°C)

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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 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.