FI Charts ( T120+ onwards) Spring 2025 **READ MOD NOTE IN FIRST

A definite shift toward less unsettled conditions beyond the weekend, although it won't be completely dry by any means

A washout Good Friday and a varied Easter Weekend will give way to a drier, warmer period in the last week of April.

Monday and Tuesday will feature a mix of sunshine and occasional showers, with temperatures rising from weekend highs of 9–12C to 11–13C.

High pressure will dominate near or over Ireland from mid-week next week, bringing mostly dry weather and temperatures climbing to 14–17C.

The GEFS Ensembles graph indicates increasing high pressure, rising temperatures, and decreasing rainfall after the weekend.

High pressure will build over Ireland and Britain, dominating our weather into the start of May.

Temperatures will gradually rise from 15 to 17C early next week to 18C to 21C later in the week.

High and Dry until mid-May ☀️☀️☀️

Ireland’s weather will remain under the influence of high pressure for the opening half of May, bringing abundant sunshine and minimal rainfall.

All major weather forecasting models indicate high pressure remaining in charge of our weather with average temperatures into early next week (11-16 °C), before an increase in temperatures during the second half of the week (15-19 °C).

The remarkable dry start to the month mirrors the first half of April when some parts of Ireland recorded trace rainfall totals and all of Ireland enjoyed extensive sunshine.

The second half of April was much more unsettled however, with Atlantic frontal systems bringing spells of heavy rain.
The latest output from the Global Forecast System (GFS) weather model for the next 16 days up to 17 May supports the outlook for low rainfall totals, with a low to moderate chance of showers in the second half of the forecast period. The ensembles model, which runs 32 forecast variations (perturbations) to account for uncertainties in input data, also indicates a gradual rise in temperatures next week. The red lines in the graphic suggest the median of all 32 variations.

Model data, which is taken from a sample location in the Midlands, highlights the continuation of high pressure near or over Ireland throughout the forecast period.

Drying conditions are currently excellent across Ireland, with an ongoing increase in Soil Moisture Deficits (SMDs) as the dry spell continues. Grass growth will consequently decrease slowly over the next 16 days following rapid growth last weekend and during much of this week.

The next two weeks will be largely dry with a mix of sunshine and scattered cloud, with temperatures improving beyond Tuesday.

High pressure will be situated close to or over Ireland through mid-May, which will allow for the extended period of settled weather.

Temperatures will climb to above the seasonal average, rising from weekend highs of 11 to 15°C to 14 to 19°C from midweek.

Sheltered inland locations will experience a touch of frost on Sunday night and Monday night.

Some scattered light showers are likely in central locations by the end of next week, but most locations will remain completely dry.

Winds will generally be light to gentle east to northeast, which will temper daily maximums in eastern and northern counties.

Apart from the far northwest, the past week has been very dry in most areas, with little or no rainfall recorded.

With increasing Soil Moisture Deficits (SMDs), grass growth will continue to slow as the coming week progresses.

Drying conditions will remain good to excellent over the next fortnight.

High pressure will continue to dominate Ireland’s weather well into next week, with largely dry and sunny conditions to continue in the meantime.

While some scattered light showers cannot be ruled out in coastal counties of the west and north at times, the primary rainfall risk centres on Sunday and Monday when an area of low pressure will edge close to Ireland’s south coast.

The most likely outcome is scattered showers feeding across the southern half of Ireland from the southeast.

Overall, many areas will escape completely dry for the next 10 days.

Temperatures will gradually reach the high teens and low 20s later this week and into next week. It will remain a few degrees cooler in coastal districts of the southeast and east due to light to gentle northeast to east winds. Even here, it will feel warm in any sunshine.

Temperatures dropped below zero Celsius in a few parts of Leinster overnight. Nights will be less cold for the remainder of the week, with only a slight chance of frost in well-sheltered inland locations of Ulster and Leinster.

With increasing Soil Moisture Deficits (SMDs), grass growth will continue to slow as the coming week progresses.

Drying conditions will remain good to excellent over the next fortnight.

The latest output from the European (ECMWF) weather model for the next 16 days up to 21 May supports low rainfall totals, with a chance of showers in the second half of the forecast period. The ensembles model, which runs 50 forecast variations (perturbations) to account for uncertainties in input data, also indicates a rise in temperatures in the coming week. The red lines in the graphic suggest the average of all 50 variations.

Model data, which is taken from a sample location in the Midlands, highlights the continuation of high pressure near or over Ireland up to the end of the forecasting period at which point there is indications of waning high pressure and Atlantic systems encroaching from the west.

Yes. Looks like that convective activity. By then, it will be quite warm (low 20s) in some places too.

The showery conditions expected on Sunday through Tuesday morning will be followed by an extended period of largely dry and, at times, very warm weather with temperatures reaching the low 20s in many spots by mid-week next week.

High pressure will remain in charge of Ireland’s weather through next weekend.

Confidence is growing among major weather models that high pressure will weaken by the middle of the following week, allowing Atlantic systems to move in from the west.

The outlook for the final 7–10 days is more unsettled, with spells of rain, strengthening winds, and occasional thundery outbreaks.

The last four runs of the GFS reveal that rainfall is favoured by day 10 of the forecasting period.