National Forecast
Issued at: 16 September 2025 08:59
TODAY - Tuesday 16th September
A dry and bright morning for most with isolated showers, mainly in Ulster and parts of Munster. Cloud will continue to build from the southwest through the day with outbreaks of rain and drizzle developing in the southwest by the afternoon, and gradually extending northeastwards through the rest of the day, turning heavy in the southwest later. However, the rain won't reach Ulster and parts of north and east Leinster until night-time. Highest temperatures of 14 to 17 degrees in light to moderate west to southwest winds, backing southerly later and freshening in the southwest and west.
TONIGHT
Widespread outbreaks of rain tonight, heavy and possibly thundery in places, with spot flooding likely. The rain will mostly clear eastwards by morning with some patches of fog developing in southern areas. Lowest temperatures of 9 to 14 degrees with southeasterly winds increasing fresh and gusty, stronger near coasts, veering southwesterly as the rain clears.
TOMORROW - Wednesday 17th September
Any remaining rain, drizzle and fog will clear early tomorrow morning, to leave a largely dry day. It'll be mostly cloudy in the morning with just limited bright spells, but there's likely to be more in the way of sunny spells through the afternoon. Later in the evening, some rain way start to encroach into southern coastal areas. Highest temperatures of 15 to 19 degrees with fresh and gusty southwesterly winds, strong or near gale force near western and northern coasts. The winds will begin to ease from the south later in the day.
National Outlook
Wednesday night: Showery outbreaks of rain will push up from the south, mainly affecting Munster and Leinster with some heavy falls possible. Staying largely dry in Ulster and Connacht with the longest clear spells in the northwest. Lowest temperatures of 8 to 13 degrees in mostly light to moderate southwesterly winds, fresh at first in the north and west and strengthening near southern coasts by morning.
Thursday: Further showery outbreaks of rain likely in the south and east though with dry intervals at times. Drier and sunnier in the north and west with a few showers. Highest temperatures of 16 to 19 degrees generally with light to moderate southwesterly winds, fresher near southern and northwestern coasts.
Thursday night: Dry for most with isolated showers. However, showery outbreaks of rain may continue to affect southern and southeastern coastal areas. Lowest temperatures of 9 to 13 degrees in light to moderate southwesterly winds.
Friday: A mix of cloud and some sunny spells along with isolated showers for most. The best of the sunny spells will be in the north. Mostly cloudy though in southeastern areas with a continued chance of showery outbreaks of rain. Highest temperatures of 15 to 17 degrees in mostly light breezes.
Saturday: A good deal of uncertainty in the details at present. Most likely there will be a fair amount of dry weather with just some showers. However, there is a chance of a low pressure system moving northwards over the country bringing some heavy falls of rain.
Temperature circle (°C): maximum and minimum temperature forecast for each day. Wind symbol (km/h): arrow points in the direction the wind is blowing. The weather and wind icons: for the time of maximum temperature and minimum temperature.