Knokke-Heist weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Poor
Best time to visit: July – August
What is the weather like in Knokke-Heist in May?
In May, Knokke-Heist is mild: daytime highs average 16 °C, and nights cool down to about 10 °C. The sea averages 12.5 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 60 mm in total. All in all, May is not an ideal month for a holiday in Knokke-Heist.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 15 h 33 min05:57 – 21:29
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Brussels
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %72 %
- Few rainy daysweight 20 %46 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Knokke-Heist in May: quick answers
Is Knokke-Heist hot in May?
No. In May, Knokke-Heist is mild: daytime highs average 16 °C and nights drop to about 10 °C.
Can you swim in Knokke-Heist in May?
Only if you don't mind cold water: in May the sea averages just 12.5 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Knokke-Heist in May?
Rain is frequent, with about 12 rainy days and 60 mm in total.
Knokke-Heist month by month
The whole year in Knokke-HeistAll destinations: BelgiumWhere to go in MaySea temperature in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences