🇭🇷 Dubrovnik Climate Health Index

Monday, 14 September 2026 · updated 03:30 UTC · refreshes live through the day · LIVE

Modelled estimates · Medically reviewed guidance · Not an official warning service

^est. = index derived by Mobi Doctor's model from the weather inputs. All values are modelled estimates from European weather and atmospheric forecast systems (Open-Meteo · CAMS/Copernicus) — not direct readings from a monitoring station in this city, and not official public-health warnings.

The Climate Health Score for Dubrovnik today is 5.3/10 — high exposure on a 0–10 scale where 10 is extreme. It reflects the worst of ten live hazard readings for Dubrovnik — heat, UV, air quality, pollen, hydration demand, allergy, mosquito activity, fire weather, flu season and cold — and is recalculated through the day by Mobi Doctor's European Climate Health Index.

How heat behaves in Dubrovnik

Dubrovnik concentrates Adriatic humid heat inside limestone walls that store and radiate it: the old town runs hotter than its surroundings well into the evening. Cruise-schedule sightseeing puts thousands of unacclimatised visitors into that stone bowl at the worst hours of the day.

Dubrovnik is a walled stone amphitheatre facing south into the sun: the old town's limestone streets and the famous wall circuit form a heat trap of rare purity — elevated, reflective, shadeless and paid-entry, so visitors persist through conditions they would otherwise flee. The city's permanent population is small and old; its summer population is enormous, unacclimatised and concentrated into the trap at cruise-schedule hours. The surrounding karst offers no green relief.

Heat and your health in Dubrovnik today

Feels-like maximum 25°C (air temperature 26°C) · tonight's minimum 23°C · humidity 48% · heat pillar score 1.9/10

Where today sits in Dubrovnik's year: the heat season here typically runs June to late September, sea-locked, peaking mid-July to late August. Tropical nights in Dubrovnik: unbroken through July and August inside the walls and along the shore.

Heat stresses the body long before heatstroke. As the air temperature and humidity climb, your heart works harder to push blood to the skin for cooling, you lose fluid and electrolytes through sweat, and blood pressure can dip when you stand. That is why hot days bring more dizziness, fainting, migraines, kidney strain and falls — and studies of heatwave hospital admissions also report more urinary tract infections, thought to be linked to dehydration — not just classic heat exhaustion.

Night temperature matters as much as the daytime peak. When a night stays above 20°C — a tropical night — the cardiovascular system gets far less of its overnight recovery window — one reason heatwave mortality tracks hot nights more closely than hot afternoons. Tonight in Dubrovnik is forecast to stay around 23°C, so prioritise cooling the bedroom before you sleep.

Pollen count in Dubrovnik today

Leading species: Ragweed at ~6 grains/m³ · pollen score 2.6/10

Dubrovnik's pollen calendar: Cypress February–March · grass April–June · olive May–June. The live counts above show where today falls in that cycle.

Pollen allergy (hay fever) is triggered by different plants through the year: trees like birch and alder in spring, grasses in early summer, and weeds such as mugwort and ragweed from late July into autumn. Symptoms — sneezing, itchy eyes, a blocked nose, worsened asthma — flare when daily counts cross species-specific thresholds, and air pollution makes the same pollen load feel worse by priming the airways.

On high-count days: keep windows closed in the early morning and evening, shower and change after time outdoors, and start antihistamines before symptoms peak rather than after. If you use an asthma inhaler, keep it with you on high pollen days.

Allergy load in Dubrovnik today: pollen × air quality

Combined pollen-and-air allergy load 2.8/10 — pollen 2.6 amplified by air quality (EAQI 32) · estimated from live data

Dubrovnik's parietaria works the city walls year-round, cypress carries spring, and cruise-season ship traffic adds priming particles a small city otherwise lacks. Sea winds usually keep the combination moderate.

Allergy risk is more than the pollen count. Exhaust particles damage the airway lining and prime the immune response, so the same grains provoke stronger symptoms on polluted days — and pollutant-stressed plants release more allergenic protein per grain. This combined score therefore reads pollen and air quality together: identical counts can feel very different on clean and dirty days, which is why it is tracked as its own pillar rather than folded into either input.

Today the combination is modest — sensitised people can treat this as a normal day, with the usual seasonal routine.

UV index in Dubrovnik today

Maximum UV index 5.3 · moderate on the WHO scale

Dubrovnik's strong-UV season: April to September — midday index 8–9 with strong marine reflection.

UV radiation peaks between late morning and mid-afternoon and is invisible — it burns on cool, cloudy days too. At UV 8 and above, unprotected fair skin can burn in under 30 minutes. Repeated burns drive most skin-cancer risk, and some common medicines (certain antibiotics, diuretics, acne treatments) make skin dramatically more sun-sensitive.

Sun protection is low-priority today, but sunscreen remains sensible for extended time outdoors.

Air quality in Dubrovnik today

European AQI 32 · fair (EAQI scale: 0 good → 100+ worst) · PM2.5 10.8 µg/m³ · ozone 64 µg/m³ · score 2.7/10

Dubrovnik breathes clean Adriatic air except when the region burns: summer wildfire smoke, sometimes from across the border, is the episode worth checking, alongside cruise-ship exhaust settling into the old harbour on still mornings.

Fine particles (PM2.5) reach deep into the lungs and bloodstream; ozone forms in sunny, hot weather and irritates the airways — which is why heatwaves and smog often arrive together. People with asthma, COPD, heart disease, pregnant women and children feel the effects first: more wheeze, more inhaler use, more chest tightness.

Levels are acceptable for outdoor activity today for most people, including sensitive groups.

Fire weather around Dubrovnik today

Fire-weather score 2.5/10 — 26°C, 48% humidity, wind to 10 km/h · estimated (weather conduciveness, not active fires)

The 2007 Srđ fire burned the mountain directly above the old town — Dubrovnik's fire exposure is vertical and close, and dry-summer pine and scrub on the karst reload it. High scores here deserve respect; this coast burns.

This pillar scores how conducive the weather is to wildfire — heat, dry air and wind, the published Angström approach — not actual fires. Its health meaning is smoke: wildfire smoke is concentrated fine particulate that can travel hundreds of kilometres, and a smoke episode hits the same people hardest as any pollution spike — asthma, COPD, heart disease, pregnancy, young children and older adults.

Conditions are not notably fire-conducive today. If you see or smell smoke regardless, treat it like a pollution episode: head indoors, close the windows, and postpone outdoor exertion.

Hydration in Dubrovnik today

Hydration demand score 1.4/10 · estimated from live weather

Dubrovnik's wall circuit is a dehydration machine: elevated, reflective, shadeless and 90 minutes long — do it pre-loaded with water in hand, because there is exactly one fountain stop and the exit points are few.

Fluid needs are not fixed — they scale with heat, humidity, dry air, UV and activity. Thirst lags behind need, especially in older adults, whose thirst signal weakens with age. Dark urine, headache, and light-headedness on standing are earlier and more reliable signals.

Today's guidance: Normal — drink to thirst; keep water with you on long outings.

Mosquito activity in Dubrovnik tonight

Mosquito activity score 5.3/10 — tonight around 23°C at 48% humidity · estimated from live weather (activity, not disease risk)

Mosquito season in Dubrovnik: May to October — tiger mosquito established; garden and terrace dusk. The score above places tonight inside that season using live temperature and humidity.

Mosquitoes fly when nights are warm and humid enough — activity climbs steeply once evenings hold above about 15°C and peaks on still, muggy nights. Southern Europe adds the tiger mosquito, a day-biter now established across much of the Mediterranean, whose continued spread north ECDC tracks. In parts of southern and central Europe, late summer also brings limited local transmission of mosquito-borne infections such as West Nile virus — an activity score is not a disease-risk score, but high-activity weeks are when precautions earn their keep.

Practical: use a repellent containing DEET or icaridin at dusk, cover ankles and wrists outdoors in the evening, screen or close windows at night, and empty standing water on balconies weekly. Speak to a doctor about any fever that develops in the week after heavy bite exposure in an affected region.

Flu season in Dubrovnik: where today sits

Flu-season level 0.9/10 · seasonal climatology (ECDC winter pattern), not live case counts

Flu in Dubrovnik runs December to February, peaking in January in the intimate winter version of the city. Summer sits at the floor. Autumn vaccination is the standing advice for older residents once the season's crowds disperse.

Influenza in Europe is sharply seasonal: transmission runs low through summer, builds from late autumn as life moves indoors and cool, dry air favours the virus, then peaks between December and February in ECDC's surveillance pattern. This pillar follows that climatology — it tells you where the calendar sits, not this week's case counts, and we label it that way rather than dress a seasonal curve up as live surveillance.

What to do with it: the score rising through autumn is the cue that vaccination time has arrived — October to November gives antibodies time to build before the peak, and matters most for over-65s, pregnant women, young children and anyone with heart, lung, kidney or immune conditions. At today's low seasonal level, a summer fever is far more likely to be something other than flu — and worth a doctor's opinion if it lasts.

Cold stress in Dubrovnik: the other end of the index

Cold-stress score 0.0/10 — tonight's minimum around 23°C

Dubrovnik winter is mild Adriatic — 6–13°C, frost essentially unknown — punctuated by bura blasts that turn the exposed Stradun into a wind tunnel. Cold risk is wind-chill and damp stone interiors, not the thermometer; the pillar stays low.

Across Europe, cold claims more lives each year than heat — mostly quietly, through winter's extra heart attacks, strokes and respiratory infections rather than hypothermia. Cold air raises blood pressure and thickens blood within minutes, narrows airways, and stresses hearts hardest in the first snaps of the season, before bodies and habits adjust. Indoor cold in poorly heated homes does as much damage as the weather outside.

Cold is not a factor today — the score sits low, and this pillar will matter again when the season turns. It stays on the page year-round because an honest index needs both ends of the thermometer.

The Dubrovnik climate-health year

The far-Adriatic year is the mildest winter and longest swim season on the Croatian coast: spring pollen (cypress, grass, olive) passes by June, and from then to late September the sea holds the walled city in humid warmth with tropical nights running unbroken through the peak. The jugo loads the worst humid spells; the bura clears them. October remains warm; the season's medical signature is visitor heat exhaustion on the walls, mid-afternoon, June to September.

Typical seasonal patterns from established climatology — the live scores above always reflect today's actual conditions.

Visiting Dubrovnik? What travellers should know

The wall circuit is the single most predictable heat exposure on the Adriatic: two kilometres of elevated white stone with no shade and no exit shortcuts — walk it at opening or in the last entry window, never midday, with water and a hat as entry requirements you set yourself. Time the old town against the cruise schedule (before 10:00 or after 17:00). The cable car sunset trip beats the midday one twice over. Sea days need marine UV logic: reflection burns under a breeze that hides it.

If you do get ill away from home, you don't have to navigate a foreign health system for something a consultation can solve: speak to a Mobi Doctor physician online from your hotel or apartment.

Medicines in Dubrovnik this week

Temperatures are currently inside normal storage ranges. Standard advice applies: keep medicines below 25°C, out of direct sun, and never in a parked vehicle.

Should I speak to a doctor about heat symptoms?

Heat illness escalates in stages, and the right response depends on which stage you're seeing. Use these three tiers:

Local numbers in Croatia: 112 — EU-wide emergencies · 194 — ambulance · for non-urgent concerns, a Mobi Doctor physician is online in minutes.

General guidance, not a personal assessment — when in doubt, call. In an emergency always call 112.

Sources for the medical guidance

The clinical guidance on this page follows public authority sources:

Medication storage limits follow each product's manufacturer information (SmPC / patient leaflet) — always defer to the leaflet for your specific product, and to your prescriber for personal advice.

Frequently asked questions

Is it safe to exercise outdoors in Dubrovnik today?

Yes — heat is not a limiting factor today (heat score 1.9/10). Usual sun protection applies.

Do I need to worry about storing insulin or Ozempic in Dubrovnik this week?

Standard rules apply this week: unopened stock in the fridge at 2–8°C, in-use pens below 30°C away from direct sun.

Who is most at risk from today's conditions in Dubrovnik?

Today's Climate Health Score is 5.3/10 (High). Elderly: low · Children: low · Outdoor workers: low · Athletes: low. Led by mosquito activity at elevated levels — no extreme single hazard today.

Will tonight be a tropical night in Dubrovnik?

Yes — the minimum stays around 23°C (a tropical night is one that never drops below 20°C). Cool the bedroom before sleep, use light bedding and hydrate before bed; hot nights are when heat strain accumulates.

When is the heat season in Dubrovnik?

Typically June to late September, sea-locked, peaking mid-July to late August. Unbroken through July and August inside the walls and along the shore. Today's score at the top of this page reflects live conditions, not the seasonal average.

When is pollen season in Dubrovnik?

Cypress February–March · grass April–June · olive May–June. This page tracks live counts for six species (alder, birch, grass, mugwort, olive and ragweed) and updates them through the day.

When is mosquito season in Dubrovnik?

May to October — tiger mosquito established; garden and terrace dusk. The live mosquito-activity score on this page places tonight inside that season using temperature and humidity — it measures activity conditions, not disease risk.

Highest-risk cities in Europe today

All cities:

Dubrovnik score history — last 30 days

One point per day, refreshed by the daily rebuild. Full archive downloads in the press room.

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Cite this page: “Mobi Doctor — European Climate Health Index, Dubrovnik Climate Health Index”, https://www.mobidoctor.eu/health-index/dubrovnik/ — updated daily, data CC-BY 4.0 with attribution.