National Forecast
Issued at: 17 September 2026 21:00
TONIGHT
Mostly dry tonight with clear spells and just isolated showers. Cloud will build from the west through the night with patchy rain and drizzle developing in some western parts by morning. Lowest temperatures of 8 to 13 degrees in light to moderate southwesterly winds, fresher for northern and western coasts.
TOMORROW - Friday 18th September
Mostly cloudy tomorrow, with outbreaks of rain extending eastwards to all areas through the morning, some of that heavy for a time, especially further west. While the rain will ease in the afternoon, there'll be further scattered outbreaks of rain and drizzle in many areas for the rest of the day, along with some mist and hill fog. There'll be some drier spells too though through the afternoon and into the evening, these mainly further south and also in some eastern parts later. Highest temperatures of 15 to 18 degrees in moderate to fresh and gusty southwest winds, stronger for exposed coasts.
National Outlook
Overview: Becoming drier and more settled as high pressure builds.
Friday night: Mostly cloudy at first with patchy rain and drizzle, along with mist and hill fog, becoming confined to southern areas as clear spells and isolated showers follow from the northwest. Temperatures will not fall below 11 to 15 degrees in moderate to fresh west or southwest winds.
Saturday: Rain, drizzle and mist will clear from southern areas in the morning to leave a mix of sunny spells and well scattered showers, most frequent over the northern half of the country. Highest temperatures from 15 degrees in the northwest to 20 degrees in the southeast, all in moderate to fresh westerly winds, stronger in the northwest.
Saturday night: Dry for most with clear spells and just a few showers, mainly in the northwest. Lowest temperatures of 8 to 12 degrees with westerly winds decreasing light to moderate.
Sunday: Mostly dry early on with a mix of cloud and sunny spells though a few stray showers will occur, mainly in the north and west. Cloud will thicken in the southwest and west with some light rain or drizzle possible. Highest temperatures of 14 to 18 degrees in light, occasionally moderate westerly or variable breezes.
Monday: Mild and rather cloudy with just some bright or sunny spells developing. While there will be a good deal of dry weather overall, patchy rain and drizzle will occur along with some mist and hill fog. Highest temperatures of 17 to 21 degrees in light, occasionally moderate southwesterly winds.
Further Outlook: Current indications suggest that high pressure will be the main driver of our weather for midweek. While there will be some rain or showers, there will be plenty of dry weather. Highs will reach the high teens to low twenties.
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.