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Charts ( up to T120) Summer 2026 **READ MOD NOTE IN FIRST

Gonzo

Mod Note:

This thread is for posting/discussing/analyzing CHARTS in the shorter range timeframe up to T120 hours (next 5 days) for Summer 2026.

If your post does not specifically relate to a chart then it doesn't belong here - Off topic posts will be moved

Thank you.

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The opening 5 days of June is currently looking unsettled with rain or showers every day with the unsettled theme set to remain well beyond this short range outlook.

Today Sunday 31 May could be the last dry day for a while so a good opportunity to get lawns/gardens cut today.

20 to 35mm rainfall can be expected over the next 5 days in the form of rain or showers.

Temperatures sliding away as the week progresses with temperatures struggling to get much above 11C in many areas by Thursday/Friday.

Not the sort of charts one wants to see for the start of summer.

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Ros4Sam24

Wednesday looks like a great day to start the leaving!

gandalfio

Any consensus from the charts yet for Friday?

Meteorite58

A good deal of dry weather over the weekend after the rainfall peters out later Fri although could be showery along Atlantic counties later Fri from a trough and getting fairly warm for many as the weekend progresses, looks very warm in parts on Monday and ECM showing a source of precipitation maybe from a cold front but a bit far away to be sure ( UKMO has a different timing and GFS not showing it ) but if there was, with that heat, it could lead to thunderstorms. Tues could be a cloudier day in parts and warmer further SE.

.Donegal.

Aperge 39c England Tuesday. For us. 25c SE, as low as 14c in the NW.

Hairypoppins

Latest gfs Is a sizzler for nxt week

Gonzo

yep the GFS 12z is definitely a bit warmer, getting to 29C in places on Thursday. However the Atlantic rolls back in very soon after.

igCorcaigh

What sort of humidity can we expect?

Condor24

Blink and you miss it. Well, Thursday looks like a 30c day somewhere but it'll be mid twenties rest of the time and then it's shunted away next weekend. Enjoy it anyway.

esposito

https://www.boards.ie/discussion/comment/124564060#Comment_124564060

Still time for things to change, but my god I’m so fed up of these blink and you’ll miss it affairs. Can we not get at least a week of the heat? Same in winter with the cold air. The Atlantic always seems to get back in quickly which is frankly so frustrating.

Meteorite58

Nice warm day tomorrow for many and looking like good long spells of sunshine. Things really pick up on Mon especially parts of Munster and should see temps getting up to 25C or so , GFS saying up to 26C, ARPEGE is much higher up to 29C but inclined to over do it a bit especially a couple of days out.

Tues looking very warm in the S, SE, E and could get tup to 27 or 28C further SE.

Weds GFS much warmer than the ECM, GFS high 20's, and ECM up to 23 or 24C or so in the Southern half of the country, will have to see how this one pans out.

Thurs nearly all the models showing very high temperatures in the high 20's at least, some showing 30- 31C, will see as the week progresses.

esposito

Thursday 25th looks to be the hottest day with 20c 850 hPa temp covering most of the country. This means temperatures into the low 30s likely in some places with the all time highest temperature record unlikely to be broken.
ECM 12z below.

Unfortunately (or fortunately for some) it looks to be cooling down Friday onwards. Never lasts long does it.

igCorcaigh

Could the June record be broken? The summer is still young.

Gonzo

https://www.boards.ie/discussion/comment/124566668#Comment_124566668

temperatures probably won't reach their true potential because this shark fin of +20 uppers is going to pass through the country in a matter of hours with Atlantic air brushing it to our east way too quickly. Still overall the coming working week will overall be very warm to hot at times. There's also the possibility we could get another heat plume in July but I think i'd rather the next warm spell to be a week or more of Azores high right over us giving us a longer run of temperatures well into the 20s and hitting close to 30C. The icing on the cake would be to have it book ended over 2 weekends.

Dazler97

https://www.boards.ie/discussion/comment/124566784#Comment_124566784

The June record is 33.3⁰c hopefully we scrape a 34⁰c

Meteorite58

ECM 12Z showing a very hot day Weds getting up to 28C followed by a very warm night, could even have a so called Tropical night in the Southern half of the country with temp not dropping below 20C in a few parts perhaps. Thurs looking even hotter again from the ECM showing 21 to 22C by 07.00 , 26 to 28C by 10.00 followed by widespread 30C and even 31C. Maybe the ARPEGE wasn't that far off the mark after all. ECM I find will be more conservative than extreme with temperature predictions so the question is could this even get hotter ??

xx_model-en-324-0_modez_2026062012_99_4877_1 (1).png

Gonzo

https://www.boards.ie/discussion/comment/124566905#Comment_124566905

I find it hard to believe that while nearly every other European country is smashing all time heat records almost every summer now or in very recent times, our record goes back well over a century. I can't wait to see it get smashed and I want that to happen this summer. This record has gone on for far to long and it's kinda strange it's never been beaten in modern times considering what has happened everywhere else in Europe.

I want a clean smash as well, not a 33.4 or 33.5 but it has to make 34.0C at the very least to be considered a proper new all time record and I want it to happen while all of us here are still young enough to enjoy it.

Ros4Sam24

Even if we do not get the all time high temp, the feel-like temp could be the hottest we’ve ever seen. Ecm going for 31c temperatures and 24c dew points in some areas on Thursday. Bearing in mind on July 18th 2022 when 33c was hit in the Phoenix Park dew points were in the mid teens.
Can any other posters think of such high temps being coupled with such oppressive dew points? @sryanbruen

Thunder87

Very similar synoptics to the spell in 2022 where 33C was recorded at Phoenix Park, probably a touch windier though and given it's nearly a month earlier sea temps are lower which would dampen temperatures on the east coast this time around

sryanbruen

https://www.boards.ie/discussion/comment/124567944#Comment_124567944

August 2003 had some 21C DPs with high 20s. 30C occurred a few days later when dew point dropped a little.

That's the closest I can think of, July 2021 was humid as well but high teens/touching 20C so lower again. So as far as I can see, this would be unprecedented at least in the modern era and with the limited dew point data there is (using ERA5 reanalysis on Meteologix as reference and some station hourly data from met.ie).

Dazler97

https://www.boards.ie/discussion/comment/124567874#Comment_124567874

I’ve been saying this for years I want a big smash record 35°c or even 37°c

Gonzo

https://www.boards.ie/discussion/comment/124568244#Comment_124568244

I'd say 35C is possible under the most extreme direct hit plume but I reckon 37C is simply not achieveable here, we would need a bigger landmass for that.

Thursday is likely to see 32C somewhere but thunderstorms could lower the overall potential.

Wednesday night will also be interesting across the south as some places may struggle to get below 25C on Wednesday night.

pureza

The deep dive on the UK met office YouTube tracked the surface air around next week as originating in Iceland

So there’s a hurdle more complicated in Ireland to cross than in areas closer to the continental upper air heat dome

That and the lower sea temperatures out our way

Synoptics charted that make it difficult to see where Ireland is on the map are remarkable though

Dazler97

https://www.boards.ie/discussion/comment/124568893#Comment_124568893

That would be our lowest night temperature id say on record and yes I love thunderstorms, also the only other European country with a lower record temperature is Iceland with 30.5⁰c if I'm not mistaken

Gonzo

Arpege wants to give 34C on Thursday, probably overcooking it.

Thunder87

https://www.boards.ie/discussion/comment/124568139#Comment_124568139

According to Claude from a side project I'm working on!

Dazler97

https://www.boards.ie/discussion/comment/124569139#Comment_124569139

34⁰c in Dublin, Galway and Mayo on that fingers crossed 🤞

.Donegal.

I’ve never seen 35c before

JanuarySnowstor

Worth noting a few things,

The upper 20C line is hovering near the South for a good couple of days. Also little upgrades have meant that Thursdays heat is now back in line with the more extreme runs from 2 days ago!

For those around long enough, this is classic bay of Biscay type low! Met Eireann not saying much but for me it looks the real deal!

BLIZZARD7

Arpege has 38c over Kildare and a 37c over Galway on Thursday ! 😮😮😮

Meteorite58

https://www.boards.ie/discussion/comment/124570007#Comment_124570007

Get the water buckets on standby 😀