Keem Bay, Achill

Co. Mayo · faces SE · partly sheltered ·

Directions

Blue Flagnarrow roadLifeguards in seasonToiletsParkingAccessible: Ramp leading to the beachDogs on a lead

Onshore wind, but the bay is partly sheltered, calm sea.

Scores are estimates from forecasts, not a safety rating. Before you go in

Tides (model): Low 01:00 · High 08:00 · Low 14:00 · High 20:00

Sunrise 08:06 · Sunset 16:43 · UV 0 (low)

Water quality

ExcellentLatest official EPA rating (2025 season) · 2024: Excellent · 2023: Excellent · 2022: Excellent

The EPA rates each bathing season after it ends, using the last four years of samples: the 2026 rating is usually published in spring 2027.

After heavy rain this beach can have short-term pollution. Check for alerts on beaches.ie before swimming, especially in summer.

Source: EPA bathing water data (Keem Beach, Achill Island), CC BY 4.0. Water is tested from June to mid-September. Beach profile (PDF)

Hour by hour · Overall · Today

Wind in

Time	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21
Score	dark	1.9	4.2	4.2	4.3	4.5	4.5	4.2	1.9	1.8	1.8	dark	dark	dark	dark	dark
Wind kn	18	21	20	21	22	21	23	22	22	20	21	21	16	17	14	15
Direction	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S
Waves at beach m	0.1	0.1	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.0	0.0	0.0	0.0	0.0
Swell offshore m · s	1.2 6s	1.3 6s	1.4 6s	1.4 6s	1.5 6s	1.6 6s	1.7 6s	1.7 6s	1.8 7s	1.9 7s	1.9 7s	1.9 7s	1.9 7s	1.8 7s	1.6 7s	1.5 7s
Tide
Water °C	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.8	11.8	11.8	11.8	11.8	11.8
Air °C	10	11	11	11	11	12	12	11	11	10	11	11	11	10	11	11
Rain chance %	78	76	75	76	79	84	88	92	96	98	98	97	90	75	55	39
Rain mm	0.3	0.7	0	0	0	0	0	0.2	0.9	0.3	0.5	0.7	1.2	1.5	0.5	0
Cloud %	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

Highlighted columns: the best 3-hour window; grey columns are before sunrise or after sunset. Tides come from a global model and can be off by up to an hour: check local tide tables before swimming.