Average monthly wind speed in Belfast

Here you can view the typical wind conditions throughout the year in Belfast, (Antrim County), the United Kingdom.

Throughout the year, wind speeds in Belfast average from 4 m/s (8 knots) and increase to 5 m/s (10 knots).

In April, May, June, July, August and September you will have an average wind speed of 4 m/s (8 knots), indicating a noticeable breeze on most days. Daily variations can range from very light winds to stronger gusts. On an average day with 4 m/s (8 knots), small tree branches sway steadily. This speed is equivalent to 14.4 kilometers per hour or 8.9 miles per hour. While the climate generally allows for outdoor activities, occasional gusts may affect activities such as ball games. It can also produce white-capped waves over water.

Wind speeds average 5 m/s (10 knots) in , marking the windiest months of the year. The air is often steady and noticeable throughout the month, though occasional stronger gusts or brief calms may occur. Windy conditions are typical during this period, making it a great time for activities like windsurfing and kitesurfing.

For more detailed information about Belfast’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Belfast climate page.