National Forecast
Issued at: 18 March 2026 05:00
TODAY - Wednesday 18th March
Some early sunny spells in the northwest but otherwise mostly cloudy this morning with patchy rain, drizzle and mist with some fog too. The patchy rain and drizzle will gradually track northwestwards as sunny spells develop in the south and east during the afternoon. The last of the rain and drizzle will clear by the evening. Highest temperatures of 10 to 15 degrees with light, occasionally moderate easterly or variable winds.
TONIGHT
Dry tonight with a mix of cloud and clear spells. Some mist and fog will develop later in the night. Lowest temperatures of 3 to 8 degrees in light, occasionally moderate northeasterly breezes.
TOMORROW - Thursday 19th March
Most mist or fog patches will clear tomorrow morning to leave a dry and sunny day. However, coastal fog may persist for eastern and southeastern coasts. Highest temperatures of 12 to 17 degrees with a mostly light easterly breeze, moderate at times near southern coasts.
National Outlook
Overview: Mostly dry before rain and drizzle moves in from the west during Sunday.
Thursday night: Dry and mostly clear. Lowest temperatures of 1 to 5 degrees. Plenty of fog will develop in light variable breezes.
Friday: Fog will mostly clear through the morning but may linger near some eastern and northeastern coasts keeping conditions duller there. Elsewhere it will be dry with plenty of sunshine. Highest temperatures of 12 to 16 degrees in a mostly light southerly breeze.
Friday night: Another dry night with long clear spells though more cloud will move into the northwest later in the night. Lowest temperatures of 1 to 5 degrees generally, possibly a little colder in the southwest. Areas of fog will develop again in near calm conditions, most likely in the south and east.
Saturday: Fog will again clear for most during the morning but could linger near some coasts. Otherwise, it will be dry day for most with hazy sunshine. It will be duller in parts of the northwest though with a few spots of light rain or drizzle. Highest temperatures of 11 to 14 degrees in light variable breezes.
Sunday: Some early sunny spells in the east but turning cloudier through the morning with a little light rain or drizzle in places. More persistent rain will develop in parts of Connacht and Ulster during the afternoon and evening. Highest temperatures of 10 to 13 degrees with moderate southwesterly winds developing, freshening later near Atlantic coasts.
Early next week: Cooler and unsettled with spells of rain and showers. Breezy or rather windy for a time too.
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.