Ireland is preparing for a prolonged spell of very warm or hot weather, with Met Éireann warning that temperatures could climb into the high 20s and potentially reach the low 30s in some areas.
A national weather advisory for Ireland says daytime temperatures will widely exceed 25°C as the week progresses, while warm and humid nights could leave temperatures above 15°C in many places.
The developing conditions may meet Ireland’s definition of a heatwave in some locations if temperatures remain above 25°C for at least five consecutive days.
Met Éireann is also warning of high to very high ultraviolet levels, uncomfortable nighttime conditions, increased water-safety risks and the possibility of thunderstorms later in the week.
Has Met Éireann Issued a Heat Warning for Ireland?
At the time of publication on Tuesday, 7 July 2026, Met Éireann had not issued a Status Yellow, Orange or Red high-temperature warning.
The national weather-warning level remained Status Green, meaning no land-based weather warning was in operation. A separate marine warning was active for southwest winds reaching force six at times.
However, Met Éireann has issued a weather advisory for Ireland covering the approaching spell of very warm or hot weather.
An advisory is an early notification about potentially significant weather. It allows people, businesses and public services to prepare before conditions reach the criteria required for a formal colour-coded warning.
The advisory states that heatwave conditions are expected, with daytime highs widely above 25°C and temperatures reaching the high 20s or possibly low 30s from Friday onwards.
Ireland Heat Advisory: What Does the Notification Say?
Met Éireann’s advisory warns of a prolonged period of very warm or hot weather lasting through this week and into next week.
The main points include:
- Daytime temperatures widely exceeding 25°C
- Highs reaching the upper 20s or low 30s in places
- Warm and humid nights
- Minimum temperatures of 15°C or higher
- Possible tropical nights during the weekend
- High to very high UV levels
- A possibility of thunderstorms later in the week
A tropical night occurs when the temperature does not fall below 20°C. Such nights are relatively unusual in Ireland and can make sleeping difficult, particularly in buildings that retain heat.
How Hot Will Ireland Get?
Temperatures will vary considerably depending on cloud cover, wind direction and distance from the Atlantic coast.
Met Éireann’s national outlook indicates that temperatures will rise as the week continues, with the warmest conditions expected across inland areas, the Midlands, the south and the east.
The latest official forecast points to daytime temperatures between approximately 20°C and 25°C initially, before values increase later in the week. Some areas could reach 27°C, 28°C or higher, with the possibility of temperatures around 30°C in the hottest inland locations.
Atlantic coastal areas may remain cooler because of cloud, fog or onshore breezes.
Ireland Weather Forecast by Region
Conditions will not be equally hot across the country.
Dublin and the east
Dublin and surrounding eastern counties are expected to experience warm or very warm conditions, with temperatures in the mid-to-high 20s possible during the hottest days.
The official Dublin forecast indicated highs of between 24°C and 28°C during the developing warm spell, with coastal areas potentially cooler where sea breezes develop.
Cork and the south
Cork and other southern counties are likely to experience temperatures in the mid-20s, although coastal cloud and fog could keep some southern coastal locations cooler.
Inland parts of Munster could become considerably warmer than areas immediately beside the sea.
Galway and the west
Western coastal areas may begin the period with more cloud and lower temperatures.
However, Galway and inland parts of Connacht are expected to become significantly warmer by the weekend, with temperatures potentially rising into the mid or high 20s.
Limerick and the Midlands
Limerick, the Midlands and inland areas of Munster are among the places most likely to experience the highest temperatures.
Forecast data points to highs of approximately 27°C or 28°C during the weekend, with local values potentially higher depending on sunshine and cloud cover.
Donegal and the northwest
The northwest is expected to remain somewhat cooler during parts of the warm spell because of Atlantic cloud, drizzle and breezes.
Temperatures may still rise significantly when sunshine develops, but exposed coastal areas are unlikely to be as hot as inland Leinster or Munster.
When Will the Heatwave Begin in Ireland?
Ireland will become progressively warmer through the week, but the most intense period is expected from Friday, 10 July, continuing through the weekend and potentially into the following week.
Met Éireann says temperatures will widely exceed 25°C, with the high 20s or low 30s possible in places from Friday onwards.
Forecast confidence can decrease further into the future, so the exact peak temperature and hottest locations may change.
Readers should check the latest national and county forecasts before making plans.
What Is a Heatwave in Ireland?
Met Éireann defines a heatwave as a period of at least five consecutive days during which the maximum temperature at a weather station exceeds 25°C each day.
This means Ireland can experience very hot individual days without officially recording a heatwave.
Equally, a heatwave may be confirmed at one weather station while another part of the country remains cooler.
The term therefore describes a measured sequence of temperatures rather than a general feeling that the weather is unusually warm.
Could Met Éireann Issue a Status Yellow Heat Warning?
A formal high-temperature warning could be issued if forecast conditions meet Met Éireann’s warning criteria.
An earlier Status Yellow high-temperature warning used a combination of maximum temperatures above 27°C and nighttime minimum temperatures above 15°C. Potential impacts included water-safety concerns and heat-related stress.
The current advisory forecasts similar daytime and nighttime conditions in parts of the country.
That does not guarantee a warning will be issued. Met Éireann will assess the expected temperatures, duration, affected locations, confidence level and possible impacts.
People should therefore monitor official notifications rather than relying on screenshots or older warnings shared on social media.
What Is the Difference Between a Weather Advisory and Warning?
A weather advisory highlights developing conditions that may become significant or disruptive. It often covers a longer or less certain period.
A Status Yellow warning means weather may create localised danger or disruption and people should remain aware.
A Status Orange warning signals dangerous conditions that could considerably affect people, property and activity.
A Status Red warning is reserved for rare and extremely dangerous weather capable of creating a threat to life and widespread disruption.
The current notification is an advisory, not an Orange or Red heat alert.
Why Will the Nights Feel Uncomfortable?
The expected heat is not limited to daytime temperatures.
Met Éireann says overnight lows may remain at 15°C or higher, with humid conditions and possible tropical nights in some places.
Warm nights matter because they give people, homes and infrastructure less opportunity to cool down.
Bedrooms located upstairs or facing the afternoon sun may become particularly uncomfortable.
People living in apartments, poorly ventilated homes or urban areas may experience higher indoor temperatures because concrete, brick and roads retain heat after sunset.
High and Very High UV Levels Expected
The UV index is expected to reach high or very high levels during the hot spell.
UV exposure can be strong even when the air temperature does not feel exceptionally hot.
Cloud does not completely block ultraviolet radiation, meaning sunburn can still occur during hazy or partly cloudy conditions.
People spending time outside should use high-factor sunscreen, wear protective clothing and seek shade during the strongest sunlight.
Babies and young children require particular protection because their skin is more sensitive.
Heat Health Risks in Ireland
Very warm weather can affect anyone, but some groups face greater risks.
Those who may require additional care include:
- Older people
- Babies and young children
- Pregnant women
- People with heart or respiratory conditions
- People with reduced mobility
- Outdoor workers
- Athletes and runners
- People taking certain medications
- Anyone living alone
- People without access to a cool indoor space
Symptoms of heat exhaustion can include dizziness, headaches, nausea, weakness, heavy sweating, muscle cramps and intense thirst.
A person who becomes confused, faints, develops a very high body temperature or appears seriously unwell may require urgent medical attention.
How to Stay Safe During Ireland’s Hot Weather
The best protection is to reduce heat exposure before symptoms develop.
Drink water regularly
Carry water when travelling and drink throughout the day.
People should not wait until they feel extremely thirsty, particularly during exercise or outdoor work.
Alcohol can contribute to dehydration and may make it harder to recognise the early signs of heat-related illness.
Avoid strenuous activity during peak heat
Exercise, gardening and physically demanding work should be moved to the morning or evening where possible.
The warmest part of the day is generally during the afternoon rather than exactly at midday.
Keep curtains and blinds closed
Rooms exposed to direct sunlight can become considerably hotter than the outdoor temperature.
Close curtains, blinds or shutters during the day, then open windows when the outdoor air becomes cooler.
Wear suitable clothing
Loose, lightweight clothing is generally more comfortable in hot weather.
A wide-brimmed hat, sunglasses and high-SPF sunscreen can reduce sun exposure.
Check on vulnerable people
Relatives, neighbours and people living alone may need help obtaining water, food or medicines.
A short phone call may not reveal whether someone’s home has become dangerously warm, so an in-person check may be useful where appropriate.
Water Safety Warning During the Heat
Hot weather often leads to a sharp increase in the number of people swimming in rivers, lakes, reservoirs and coastal locations.
Water temperatures can remain cold even when the air is hot.
Sudden entry can cause cold-water shock, affecting breathing and movement within seconds.
People should:
- Swim at lifeguarded locations where possible
- Check tides and currents
- Avoid swimming alone
- Stay within their ability
- Keep children under close supervision
- Avoid entering the water after consuming alcohol
- Never jump into unfamiliar water
- Use approved flotation equipment for boating and paddleboarding
The appearance of calm water does not mean an area is safe.
Fire Risk During Prolonged Dry Weather
A prolonged warm and dry spell can increase the possibility of grass, gorse and forest fires.
Disposable barbecues, cigarettes and unattended fires can ignite dry vegetation.
Visitors should follow local restrictions and avoid lighting fires in forests, parks or upland areas.
Vehicles should not be parked on dry grass because hot exhaust components can potentially start a fire.
Any signs of an uncontrolled fire should be reported immediately.
Could There Be Thunderstorms?
Met Éireann says there is a chance of thunderstorms later in the week.
Hot and humid air can create conditions in which heavy, thundery showers develop quickly.
Not every location will experience a storm, and forecasting their precise position can be difficult.
Where storms occur, possible impacts could include:
- Intense rainfall
- Flash flooding
- Lightning
- Hail
- Sudden strong winds
- Difficult driving conditions
- Local power interruptions
People attending outdoor events should remain aware of forecast changes even when the day begins dry and sunny.
Travel and Public Transport During the Heat
Most transport services are expected to continue operating, but high temperatures can create additional pressure.
Passengers should carry water and avoid waiting in direct sunlight where shade is available.
Cars can become dangerously hot within a short period. Children, vulnerable adults and animals must never be left inside a parked vehicle.
Drivers should also check tyre condition, coolant levels and fuel before longer journeys.
Rail operators may introduce speed restrictions during exceptional heat if track temperatures become a concern, although no widespread disruption had been confirmed at the time of writing.
Advice for Outdoor Events and Festivals
Ireland’s warm spell arrives during the summer festival, concert and sporting season.
Event organisers and attendees should prepare for:
- Limited shade
- Long queues
- High UV exposure
- Dehydration
- Warm public transport
- Greater demand for drinking water
- Thunderstorm-related schedule changes
Attendees should bring refillable water bottles where permitted, sunscreen, light clothing and a hat.
People should check venue rules in advance because some concerts and festivals limit bottle sizes or require empty bottles at security.
Advice for Pets During Hot Weather
Animals can overheat quickly, particularly inside vehicles or enclosed rooms.
Dogs should be walked during cooler morning or evening periods rather than on hot pavements.
A simple check is to place the back of a hand against the surface for several seconds. If it feels too hot for a hand, it may be too hot for a dog’s paws.
Pets should have continuous access to fresh water and shade.
Animals must never be left in parked cars, conservatories or poorly ventilated sheds.
Will Ireland Reach 30°C?
Met Éireann’s advisory says temperatures could reach the low 30s in some locations from Friday.
Whether an official station records 30°C will depend on the exact position of the warmest air, the amount of sunshine, cloud cover and local winds.
Inland areas of Leinster and Munster are generally stronger candidates than exposed Atlantic coasts.
Even where temperatures remain below 30°C, high humidity and warm nights may make conditions feel more uncomfortable.
How Long Will the Hot Weather Last?
The advisory indicates that the very warm or hot spell will continue through the current week and into next week.
Some regions could experience five or more consecutive days above 25°C, meeting Met Éireann’s heatwave definition.
Conditions may eventually become more changeable if Atlantic air or thunderstorms move across the country.
The end date is not yet certain, so daily forecast updates will remain important.
What Should People Do Now?
There is no need for panic, but early preparation is sensible.
People can:
- Check on vulnerable relatives
- Stock drinking water for journeys
- Locate fans and sun protection
- Move strenuous plans to cooler hours
- Review swimming and water-safety arrangements
- Prepare shaded areas for children and pets
- Enable weather notifications
- Check Met Éireann before outdoor events
The biggest risks often arise when people treat Irish heat as harmless because temperatures are lower than those recorded in southern Europe.
Ireland’s homes, workplaces and infrastructure are not always designed for prolonged hot and humid conditions.
How to Get Met Éireann Weather Notifications
People can monitor warnings through the Met Éireann website and official mobile application.
County-level alerts should be checked regularly because warnings may be issued for selected areas rather than the entire country.
Users can also follow official Met Éireann updates and enable notifications on their phones where available.
Before sharing a weather-warning image online, check the date, valid period and affected counties. Older screenshots are frequently recirculated during developing weather events and can create unnecessary confusion.
Frequently Asked Questions
Is there a heat warning for Ireland?
No colour-coded high-temperature warning was in operation on Tuesday, 7 July 2026. Met Éireann had issued a national weather advisory for a prolonged spell of very warm or hot weather.
How hot will Ireland get?
Temperatures are expected to widely exceed 25°C, with the high 20s or potentially low 30s possible in places from Friday onwards.
When will the Ireland heatwave start?
Temperatures will rise through the week, with the hottest conditions expected from Friday and across the weekend.
What is a heatwave in Ireland?
Met Éireann defines a heatwave as five or more consecutive days with a maximum temperature above 25°C at a weather station.
Which parts of Ireland will be hottest?
Inland areas, the Midlands, the south and the east are likely to experience the highest temperatures. Atlantic coastal areas may remain cooler.
Will Dublin reach 30°C?
Dublin may experience temperatures in the high 20s, but whether the city officially reaches 30°C will depend on cloud cover and sea breezes.
Will there be thunderstorms?
Met Éireann says thunderstorms may develop later in the week, although their precise location remains uncertain.
Will nights be warm?
Yes. Overnight temperatures may remain at or above 15°C, and possible tropical nights could occur during the weekend.
Is the UV level high?
The UV index is expected to be high or very high during the hot spell.
How long will the hot spell last?
Met Éireann expects the very warm or hot weather to continue through this week and into next week.
Ireland Heat Advisory: Met Éireann Warns of Heatwave Conditions, High UV and Temperatures Near 30°C
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