Sea · County Mayo · Ireland
Clew Bay, Bertra Strand
Best for kiting in October, with 50 % kite days. Water 13 °C. Also windy, but cold (water and air under 12 °C or short days): February to March.
A kite day has at least 3 hours of 12 to 35 knots (gusts up to 45) between 10:00 and 19:00, in daylight. Percentages are the share of such days in each month, counted over 9 years.
- Prime 60 % and more
- Good 40 to 59 %
- Possible 20 to 39 %
- Off under 20 %
- No data hatched
- Ringed: this month
Prime also needs a good month in at least 7 of the 9 years, so one freak year cannot make a month Prime. A month with 60 %+ but fewer good years shows as Good.
Confidence highHourly model data, 2017 to 2025, checked against the season shape of a nearby weather station, a regional model or a documented season.
Month by month
- Kite days
- 50 % Goodabout 15 of 31 days
- Too light, kiteable, too strong
- Too light 50 %
- Kiteable 50 %
- Too strong 0 %
- 10 day trip
- 5 in 10 trips got at least 5 kite days, about 4.6 expected
- Best hours
- 13:00 to 17:00when the wind is most often 12 to 35 knots
- Daylight
- 10.6 h
- Water
- 13 °C, 6/5 with boots and gloves
- Air
- 13 °Cdaily maximum, 12 °C during kite hours
- Rain
- 22 of 31with 1 mm or more
- In one sentence
In October, Clew Bay, Bertra Strand averaged 15 kite days out of 31 (50 %). Water 13 °C, 6/5 with boots and gloves. 5 in 10 trips of 10 days starting in October got at least 5 kite days.
| Kite days% of days | 41 | 66 | 51 | 39 | 33 | 42 | 32 | 45 | 43 | 50 | 40 | 47 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Verdictshare plus good years | cold | cold | cold | cold | Possible | Good | Possible | Good | Good | Good | cold | cold |
| 10 day tripof 10 trips, 5+ kite days | 5 in 10 | 8 in 10 | 6 in 10 | 3 in 10 | 3 in 10 | 5 in 10 | 3 in 10 | 5 in 10 | 5 in 10 | 5 in 10 | 4 in 10 | 6 in 10 |
| Good yearsof 0, reached 50 % | · | · | · | · | · | · | · | · | · | · | · | · |
| Best hourshour of day, most often 12 to 35 kn | 10 to 16 | 11 to 16 | 10 to 16 | 12 to 18 | 12 to 18 | 12 to 18 | 14 to 18 | 12 to 18 | 12 to 18 | 13 to 17 | 10 to 16 | 10 to 15 |
| Daylighth | 8.1 | 9.7 | 11.8 | 14.0 | 15.9 | 17.0 | 16.5 | 14.8 | 12.8 | 10.6 | 8.6 | 7.5 |
| Water°C at the surface | 7 | 8 | 8 | 11 | 14 | 16 | 17 | 17 | 16 | 13 | 11 | 8 |
| Air°C, daily maximum | 9 | 9 | 9 | 11 | 14 | 15 | 16 | 17 | 15 | 13 | 11 | 9 |
| Rain days1 mm or more | 21 of 31 | 19 of 28 | 18 of 31 | 13 of 30 | 14 of 31 | 18 of 30 | 18 of 31 | 22 of 31 | 19 of 30 | 22 of 31 | 21 of 30 | 22 of 31 |
| Wetsuitfor that water and the air on kite days, + boots and gloves | 6/5+ | 6/5+ | 6/5+ | 6/5+ | 5/4 | 5/4 | 5/4 | 5/4 | 5/4 | 6/5+ | 6/5+ | 6/5+ |
- In January, Clew Bay, Bertra Strand averaged 13 kite days out of 31 (41 %). Water 7 °C, 6/5 with boots and gloves. 5 in 10 trips of 10 days starting in January got at least 5 kite days.
- In February, Clew Bay, Bertra Strand averaged 18 kite days out of 28 (66 %). Water 8 °C, 6/5 with boots and gloves. 8 in 10 trips of 10 days starting in February got at least 5 kite days.
- In March, Clew Bay, Bertra Strand averaged 16 kite days out of 31 (51 %). Water 8 °C, 6/5 with boots and gloves. 6 in 10 trips of 10 days starting in March got at least 5 kite days.
- In April, Clew Bay, Bertra Strand averaged 12 kite days out of 30 (39 %). Water 11 °C, 6/5 with boots and gloves. 3 in 10 trips of 10 days starting in April got at least 5 kite days.
- In May, Clew Bay, Bertra Strand averaged 10 kite days out of 31 (33 %). Water 14 °C, 5/4. 3 in 10 trips of 10 days starting in May got at least 5 kite days.
- In June, Clew Bay, Bertra Strand averaged 13 kite days out of 30 (42 %). Water 16 °C, 5/4. 5 in 10 trips of 10 days starting in June got at least 5 kite days.
- In July, Clew Bay, Bertra Strand averaged 10 kite days out of 31 (32 %). Water 17 °C, 5/4. 3 in 10 trips of 10 days starting in July got at least 5 kite days.
- In August, Clew Bay, Bertra Strand averaged 14 kite days out of 31 (45 %). Water 17 °C, 5/4. 5 in 10 trips of 10 days starting in August got at least 5 kite days.
- In September, Clew Bay, Bertra Strand averaged 13 kite days out of 30 (43 %). Water 16 °C, 5/4. 5 in 10 trips of 10 days starting in September got at least 5 kite days.
- In October, Clew Bay, Bertra Strand averaged 15 kite days out of 31 (50 %). Water 13 °C, 6/5 with boots and gloves. 5 in 10 trips of 10 days starting in October got at least 5 kite days.
- In November, Clew Bay, Bertra Strand averaged 12 kite days out of 30 (40 %). Water 11 °C, 6/5 with boots and gloves. 4 in 10 trips of 10 days starting in November got at least 5 kite days.
- In December, Clew Bay, Bertra Strand averaged 15 kite days out of 31 (47 %). Water 8 °C, 6/5 with boots and gloves. 6 in 10 trips of 10 days starting in December got at least 5 kite days.
Good years are not shown here: this spot has no complete per year values, because the two models drift apart over the years. x in 10 reads: of all 10 day trips that started in that month between 2017 and 2025, x in 10 got at least 5 kite days. We cap the figure at 9 in 10 because wind is never a promise. Best hours: the hours from 10:00 on when the wind most often reaches 12 to 35 knots. Rain day: 1 mm or more of rain.
Source: ECMWF IFS 9 km via Open-Meteo, hourly model wind, 2017 to 2025; water temperature 2023 to 2025. How we count kite days and trip odds
Trip odds at Clew Bay, Bertra Strand
How often a trip of your length got at least half its days with kite wind, 2017 to 2025, capped at 9 in 10.
- January5 in 10 trips of 10 days got at least 5 kite days, about 4.5 expected
- February8 in 10 trips of 10 days got at least 5 kite days, about 6.3 expected
- March6 in 10 trips of 10 days got at least 5 kite days, about 5.3 expected
- April3 in 10 trips of 10 days got at least 5 kite days, about 3.6 expected
- May3 in 10 trips of 10 days got at least 5 kite days, about 3.3 expected
- June5 in 10 trips of 10 days got at least 5 kite days, about 4.2 expected
- July3 in 10 trips of 10 days got at least 5 kite days, about 3.3 expected
- August5 in 10 trips of 10 days got at least 5 kite days, about 4.5 expected
- September5 in 10 trips of 10 days got at least 5 kite days, about 4.7 expected
- October (now)5 in 10 trips of 10 days got at least 5 kite days, about 4.6 expected
- November4 in 10 trips of 10 days got at least 5 kite days, about 4.0 expected
- December6 in 10 trips of 10 days got at least 5 kite days, about 4.8 expected
x in 10 reads: of all 10 day trips that started in that month between 2017 and 2025, x in 10 got at least 5 kite days. We cap the figure at 9 in 10 because wind is never a promise.
Trip odds by start week
Pick your start week and trip length. Each cell: of all trips of that length that started in that week between 2017 and 2025, how many in 10 got at least half their days with kite wind.
Trip odds by start week, 10 day trips, 2017 to 2025
- 5
- 3
- 3
- 7
- 9
- 9
- 9
- 7
- 6
- 8
- 6
- 4
- 6
- 4
- 5
- 2
- 2
- 4
- 2
- 3
- 3
- 4
- 5
- 3
- 5
- 4
- 2
- 2
- 3
- 6
- 3
- 5
- 7
- 5
- 4
- 6
- 3
- 4
- 8
- 7
- 4
- 6
- 4
- 3
- 5
- 5
- 4
- 5
- 5
- 6
- 5
- 6
Colours as in the kite year: 6 in 10 and more like Prime · 4 to 5 in 10 like Good · 2 to 3 in 10 like Possible · under 2 in 10 like Off · No data hatched (fewer than 30 trips) · Ringed: this week · Raised: your start week
x in 10 reads: of all 10 day trips that started in that week between 2017 and 2025, x in 10 got at least 5 kite days. We cap the figure at 9 in 10 because wind is never a promise.
Source: hourly wind from the ECMWF IFS model via Open-Meteo, 2017 to 2025, kiteCOMPASS method v1. How we count
5 in 10
trips of 10 days starting in week 45 (e.g. 5 to 11 November) got at least 5 kite days in 2017 to 2025 (63 trips).
Zero wind trips: fewer than 1 in 20
about 4.5 kite days expected out of 10
Kite days per trip, 63 trips
Bars right of the line are good trips (5 kite days or more).
How the wind behaves
In February, the windiest month
- Too light 34 %
- Kiteable 66 %
- Too strong 0 %
Too light on 34 %, kiteable on 66 %, too strong on 0 % of days.
Best hours: 11:00 to 16:00, when the wind is most often 12 to 35 knots.
Share of kite days by wind direction, 16 sectors
Wind mostly from SW (225°), fairly steady direction.
Kitesurfing at Clew Bay, Bertra Strand: quick answers
When is the best time to kitesurf at Clew Bay, Bertra Strand?
The best month is October: from 2017 to 2025, 50 % of its days were kite days.
Is Clew Bay, Bertra Strand windy in October?
Yes, often. 50 % of days in October were kite days from 2017 to 2025, about 15 days in a typical October. 5 in 10 trips of 10 days starting in October got at least 5 kite days, 2017 to 2025.
What is the water temperature at Clew Bay, Bertra Strand?
The water ranges from 7 °C in January to 17 °C in July. In October it is about 13 °C (wetsuit: 6/5 with boots and gloves).
How many kite days does Clew Bay, Bertra Strand get in a year?
About 160 days a year were kite days from 2017 to 2025, out of 365. A kite day has at least 3 hours of 12 to 35 kn model wind between 10:00 and 19:00 in daylight, with gusts up to 45 kn.
Live forecast
The numbers above are long term averages. The forecast shows the next days.
Live forecast from Windy
The forecast map for Clew Bay, Bertra Strand comes from windy.com (Windyty SE, Prague, Czech Republic) and opens right here on this page. Once you load it, your browser contacts Windy, which receives your IP address and may set its own cookies. Nothing is loaded before you click.
Spot facts
- Region
- County Mayo
- Country
- Ireland
- Water body
- Sea, from Natural Earth map data
- Nearest airport
- Ireland West Airport Knock (NOC), 57 km straight line. Flights are not sold here; this is for planning only.
- Time zone
- UTC+01:00 in October
- Coordinates
- 53.7880, -9.6650
- Model
- ECMWF IFS 9 km via Open-Meteo, hourly
Conditions, checked against kite guides
Water state, flat areas, waves and whether schools teach here, from kite sources, not from satellite images.
Not yet checked against kite guides. We research spot conditions one by one and show only what a kite source says.
Nearby kite spots in County Mayo
Kite days in October, % of days
- Clew Bay, Mulranny
Ireland · 9 points fewer kite days than Clew Bay, Bertra Strand in October
41 %Kite days by month at Clew Bay, Mulranny: Jan 37 %, Feb 56 %, Mar 43 %, Apr 32 %, May 26 %, Jun 31 %, Jul 23 %, Aug 39 %, Sep 37 %, Oct 41 %, Nov 33 %, Dec 41 % - Carrownisky Strand
Ireland · 10 points more kite days than Clew Bay, Bertra Strand in October
60 %Kite days by month at Carrownisky Strand: Jan 57 %, Feb 77 %, Mar 59 %, Apr 47 %, May 43 %, Jun 52 %, Jul 39 %, Aug 53 %, Sep 55 %, Oct 60 %, Nov 58 %, Dec 61 % - Doogort
Ireland · 19 points more kite days than Clew Bay, Bertra Strand in October
69 %Kite days by month at Doogort: Jan 62 %, Feb 82 %, Mar 67 %, Apr 55 %, May 50 %, Jun 59 %, Jul 47 %, Aug 58 %, Sep 62 %, Oct 69 %, Nov 69 %, Dec 67 % - Keel Beach
Ireland · 30 points more kite days than Clew Bay, Bertra Strand in October
80 %Kite days by month at Keel Beach: Jan 75 %, Feb 87 %, Mar 74 %, Apr 69 %, May 66 %, Jun 74 %, Jul 61 %, Aug 69 %, Sep 73 %, Oct 80 %, Nov 80 %, Dec 76 % - Aghleam
Ireland · 34 points more kite days than Clew Bay, Bertra Strand in October
84 %Kite days by month at Aghleam: Jan 80 %, Feb 83 %, Mar 79 %, Apr 73 %, May 68 %, Jun 79 %, Jul 69 %, Aug 76 %, Sep 79 %, Oct 84 %, Nov 80 %, Dec 77 % - Claggan Island
Ireland · 18 points more kite days than Clew Bay, Bertra Strand in October
68 %Kite days by month at Claggan Island: Jan 64 %, Feb 83 %, Mar 66 %, Apr 56 %, May 50 %, Jun 60 %, Jul 48 %, Aug 60 %, Sep 62 %, Oct 68 %, Nov 69 %, Dec 68 % - Drum
Ireland · 34 points more kite days than Clew Bay, Bertra Strand in October
84 %Kite days by month at Drum: Jan 78 %, Feb 84 %, Mar 75 %, Apr 69 %, May 64 %, Jun 74 %, Jul 64 %, Aug 74 %, Sep 76 %, Oct 84 %, Nov 79 %, Dec 76 %
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kiteCOMPASS · method k3h-10to19-v1 · 2017 to 2025
Model wind: ECMWF IFS 9 km via Open-Meteo, hourly, 2017 to 2025. Water temperature: 2023 to 2025. Kite day: at least 3 hours of 12 to 35 kn model wind between 10:00 and 19:00 in daylight, with gusts up to 45 kn. Confidence: high.
Cite this
In October, 50 % of days at Clew Bay, Bertra Strand met the kiteCOMPASS kite day rule: at least 3 hours of 12 to 35 kn model wind between 10:00 and 19:00 in daylight, with gusts up to 45 kn (ECMWF IFS 9 km via Open-Meteo, hourly, 2017 to 2025). https://kitecompass.app/spot/clew-bay-bertra-strand
Numbers on this page are free to reuse under CC BY 4.0: name kiteCOMPASS and link to this page.