• It may be baking on shore, but Europe’s ocean lines are coping well with the heatwave.
• It’s the height of the season, and most are continuing to sail without interruption.
• Shore excursions, however, are subject to change. Here’s our list of what lines are doing.

It’s the height of summer in the Mediterranean and the busiest time for cruise lines. And while the beaches are sweltering, ships are sailing and could be the coolest places to be.

Major lines are not generally publishing fleet-wide Mediterranean heatwave warnings on their public travel-alert pages. Their public information concentrates on flexible itineraries, excursion cancellation deadlines and direct communication with affected passengers.

But there is health advice from European authorities: avoid strenuous outdoor activity during the hottest part of the day; drink water before and during excursions; use light clothing, a hat and sunscreen; seek shade or air conditioning; and report symptoms rather than trying to complete a tour.

Older travellers, children and people with cardiovascular, respiratory or other chronic conditions face greater risk. WHO Europe describes extreme heat as a public-health emergency and stresses the value of heat-health action plans.

Italy’s present advice is particularly explicit: avoid direct sun between approximately 11 am and 6 pm, remain in cooler indoor spaces where possible, stay hydrated and wear light clothing. The country placed all 27 cities in its national monitoring system on its highest red heat alert on 6 August.

What is happening to sun decks, pools and other outdoor areas?

The public travel pages of Royal Caribbean, MSC, Norwegian, Princess, Virgin Voyages, Costa and others continue to concentrate on itinerary and shore-excursion changes rather than heat-related deck shutdowns. Any relocation of fitness classes, deck games or entertainment into air-conditioned spaces is therefore likely to be decided ship by ship and communicated onboard rather than through a fleet-wide alert.

Outdoor areas can still be restricted for reasons associated with the wider weather pattern – particularly high winds, thunderstorms, smoke or operational safety. Passengers are being encouraged to use shade and air-conditioned interiors rather than being prohibited from using the open decks.

Cruise line by cruise line

Cruise line	Publicly verifiable position
Royal Caribbean	Weather or port-related itinerary changes are communicated directly to guests and travel advisers. The current Naples omission generated automatic refunds for prepaid shore excursions, although the change was caused by a pier assessment rather than heat.
Celebrity Cruises	Most shore excursions can be changed or cancelled without penalty until 48 hours before arrival at the relevant port, subject to exceptions for specialist experiences. This gives passengers a way to withdraw from an unsuitable walking tour before the deadline, but heat alone does not automatically create a refund after it has passed.
MSC Cruises	MSC says the final shore-excursion programme is determined port by port and can change. Its excursion range includes “Easy and Accessible” and scenic coach-based options, which may be more suitable than intensive walking tours, although MSC has not announced that these are being substituted automatically because of the heat.
Costa Cruises	Costa’s public information directs passengers to its app for weather, excursion, itinerary and timetable updates.
AIDA Cruises	Excursions reserved through myAIDA can generally be cancelled up to three days before the cruise begins, with refunds returned to the original payment method.
Norwegian Cruise Line	Most excursions may be changed or cancelled without penalty until 48 hours before arrival at the port. Where NCL cancels an excursion, its terms generally provide for refund of the excursion price rather than wider cruise compensation.
Princess Cruises	Princess states that excursions depend on suitable weather and local conditions and can be changed or cancelled.
P&O Cruises	P&O says most shore experiences can be cancelled for a refund up to three days before the holiday or 48 hours before the excursion, subject to individual-tour exceptions and onboard terms.
Cunard	Most excursions can be amended or cancelled without charge up to three days before sailing, subject to exceptions. Cunard also sells accessible and lower-activity options, but has not announced a general heat-triggered substitution programme.
Marella Cruises	If Marella cancels an excursion or port call, it says an automatic full refund will be issued, normally within seven to ten working days. Its itineraries may also change in order, timing or destination because of weather or operational conditions.
Virgin Voyages	Port and excursion changes are communicated through travel updates and the Sailor App. I found no fleet-wide public heat notice or sun-deck closure announcement.
Disney Cruise Line	Disney’s Port Adventures remain subject to weather and itinerary changes. Passengers can generally cancel before the published deadline, normally three days before the cruise, but late voluntary cancellation because conditions feel too hot may not qualify.
Celestyal	Celestyal can cancel an excursion where conditions require it, with the passenger’s principal remedy being refund of the amount paid. Normal cancellation deadlines apply where the passenger elects not to participate.
Viking Ocean	Excursion changes can be discussed with guest services onboard, but close-in passenger cancellations – generally within two days – may not be refundable. No public fleet-wide Mediterranean heat advisory has been issued.
Azamara	Its excursion programme is expressly subject to change, while cancellation penalties can apply within 24 hours of the activity. The line has not posted a general public heatwave warning covering its Mediterranean fleet.

Country-by-country port assessment

Italy Civitavecchia/Rome, Livorno/Florence and Pisa, Naples, Sicily and Sardinia

Italy currently presents the most serious western Mediterranean heat exposure. Rome is forecast around 37–38°C and Florence around 38–39°C, making full-day excursions from Civitavecchia and Livorno often involving long transfers followed by extensive walking, the principal concern. Naples is expected to reach approximately 34–36°C, while Palermo is relatively cooler on the coast at around 32–33°C but inland Sicilian excursions can be hotter; Cagliari and southern Sardinia are forecast around 33–37°C. Rome has introduced or extended evening access at some visitor sites, which creates an alternative to afternoon touring, but cruise schedules do not always allow passengers to use those hours. No heat-driven cruise-call cancellation has been confirmed; the Legend of the Seas Naples change was pier-related.

Spain – Barcelona, Valencia, Mallorca and Ibiza

Spain’s cruise ports remain operational, but high temperatures and warm nights mean passengers may begin a port day without having fully cooled down. Barcelona is forecast to be around 32–34°C, Valencia approximately 33–34°C, Palma de Mallorca as high as 36°C and Ibiza around 33–34°C, with night-time temperatures commonly remaining in the mid-20s.

Barcelona’s network of public climate shelters provides useful relief for independent passengers, while museums, markets and air-conditioned coach tours are safer alternatives to uninterrupted old-town walking. Thunderstorms around Barcelona may also cause brief outdoor or transport disruption, independently of the heat.

France — Marseille, Cannes, Nice/Villefranche and Corsica

Marseille is forecast at approximately 33–36°C, while Nice and the surrounding Riviera are around 32–34°C and subject to elevated heat warnings; Ajaccio and parts of Corsica are forecast around 33–34°C. The more significant operational issue for cruise excursions is wildfire access control.

Entry to the Calanques near Marseille is assessed daily throughout the summer: on the highest fire-risk days, land access can be prohibited, cancelling hiking and some road-based excursions, although sightseeing by boat may continue without landing. Cannes and Villefranche calls have not been generally suspended, but long visits to hill towns, exposed promenades and inland Provence are becoming more demanding.

Monaco — Monte Carlo

Monte Carlo is somewhat moderated by the sea, with forecast highs around 30–32°C, but humidity and steep gradients can make even relatively short walking tours demanding. The adjacent Alpes-Maritimes area is under elevated heat vigilance, so excursions combining Monaco with Èze, Nice or other inland and hillside destinations may be more strenuous than the temperature figure alone suggests. The compact port call should remain operational, with air-conditioned casino, museum and coach-based options providing practical alternatives to extended walking.

Portugal — Lisbon and Madeira

Lisbon and Madeira are currently among the more manageable destinations on the list. Lisbon is forecast around 29–32°C, while Funchal is approximately 27–28°C, although the south coast of Madeira has experienced a persistent high-temperature warning. The principal risk is again fire access rather than ship operations: several Sintra attractions—including Pena Palace, the Moorish Castle, Monserrate and the Capuchos Convent—were closed from 26 to 29 July because of very high rural fire danger. Current notices no longer show that blanket closure, but it demonstrates how a Lisbon excursion can be cancelled even while the ship calls normally.

Eastern Mediterranean and Adriatic

Greece — Athens/Piraeus, Santorini, Mykonos, Crete and Corfu

Athens is forecast around 35–36°C and Corfu around 36–37°C, making the Acropolis, ancient Agora and Corfu old-town walking tours particularly difficult in the afternoon. The Acropolis has already used midday closures during this summer’s severe heat spells, establishing a clear precedent for same-day excursion disruption. Santorini and Mykonos are cooler at approximately 28–30°C but extremely exposed, with little shade and strong winds; Crete is around 30–32°C.

Wildfires are now an additional risk: fires have caused evacuations in parts of Crete and western Attica, although Athens, Heraklion and Chania airports have remained open and there is no general advice against travel to Greece. Cruise calls are continuing, but individual roads, beaches, archaeological sites or excursions can be withdrawn at short notice.

Croatia — Dubrovnik, Split and Zadar

The Croatian Adriatic is one of the most uncomfortable cruise regions this week. Dubrovnik is forecast around 33–35°C, Split around 34–37°C and Zadar approximately 34–36°C, with red warnings affecting Dubrovnik and Split and night-time temperatures around 26–29°C. Dubrovnik’s city walls, Split’s Diocletian’s Palace complex and the historic centres of all three ports offer limited shade and substantial heat-reflecting stone.

The ships and ports remain operational, so the likely effect is greater demand for shortened walking tours, panoramic coach excursions, beach transfers and independent passengers returning to the ship earlier.

Turkey — Istanbul and Kusadasi/Ephesus

Istanbul is forecast around 31–32°C, but dense city conditions, queues and humidity can intensify the experience around Sultanahmet, the Grand Bazaar and waterfront attractions. Kusadasi may reach approximately 36°C, and the gateway excursion to Ephesus is more concerning because its marble and exposed archaeological landscape provide little natural shade.

Ephesus remains scheduled to open from approximately 8am to 7pm, while Turkey’s seasonal “Night Museums” programme gives selected sites evening access from June to October. That creates the possibility of cooler visiting hours, although cruise passengers should not assume that their particular line will offer an evening Ephesus excursion.

Montenegro — Kotor

Kotor is forecast around 35–36°C under an orange heat warning, accompanied by heightened forest-fire risk. The immediate harbour and old town should remain accessible, but the enclosed bay, stone streets and limited airflow can make conditions feel oppressive, while excursions climbing the city walls or travelling into the mountains require particular caution. Kotor is also frequently a tender or high-traffic destination, so queuing and return transport can add unplanned exposure.

Slovenia — Koper

Koper is forecast around 34–36°C. The port itself is compact, but many cruise excursions continue inland to Ljubljana, Lake Bled, caves, vineyards or hill towns, increasing the time spent away from the ship and potentially exposing passengers to hotter continental conditions. Air-conditioned coach touring is likely to be considerably more manageable than cycling, long city walks or outdoor food-and-wine visits.

Albania — Sarandë and Durrës

Sarandë and Durrës are forecast around 31–33°C, somewhat lower than parts of Croatia and Montenegro but still hot enough to affect exposed archaeological visits. From Sarandë, the principal concern is Butrint, where passengers spend significant time outdoors; from Durrës, longer road excursions towards Tirana or historic inland destinations extend the period away from the ship. Coastal breeze may help at the ports, but it should not be relied upon at inland sites or during coach delays.

North Africa

Morocco — Tangier and Casablanca

Morocco’s Atlantic cruise ports are presently less exposed than much of the central and eastern Mediterranean. Tangier is forecast around 28–33°C and Casablanca approximately 28–30°C, with Atlantic influence moderating the peak temperatures. Excursions to inland medinas, Chefchaouen or Rabat can nevertheless be warmer and involve long walks, uneven streets and limited shade. The principal effect is therefore likely to be passenger comfort and tour selection rather than port operations.

Tunisia — La Goulette/Tunis

Tunis is forecast around 36–37°C, with nights remaining at approximately 24–27°C. This makes La Goulette one of the higher-risk calls, because the principal excursions—Carthage, the Bardo area, Tunis medina and Sidi Bou Said—typically combine exposed ruins, walking and coach transfers. Carthage is particularly difficult around midday because of its limited shade. Ocean calls are continuing, but passengers choosing between tours should favour early departures, shorter itineraries or air-conditioned panoramic options.

Egypt — Alexandria and Port Said

Alexandria and Port Said are forecast around 31–33°C, with haze, humidity and increasingly warm nights. Coastal temperatures are below those in parts of Italy, Croatia and Tunisia, but the excursion burden can be much greater: cruise passengers may undertake lengthy road transfers and spend extended periods at archaeological or urban sites. Port Said passengers considering Cairo in particular face a long day in which transport delays can extend heat exposure.

What is most likely to happen next?

For the immediate period, the highest excursion risk is concentrated around Rome and Florence; Naples and inland Italy; Athens and Corfu; Dubrovnik, Split and Kotor; Koper; Kusadasi and Ephesus; and Tunis. Atlantic Portugal and Morocco, along with wind-exposed Santorini and Mykonos, are relatively more moderate, although none is immune to warm nights, fire controls or local weather changes.

The most probable cruise consequences are:

• an attraction closing during the hottest hours;
• a hiking, cycling or long walking excursion being substituted or cancelled;
• earlier departures or additional coach time;
• passengers opting for panoramic or accessible tours;
• wildfire restrictions closing roads, parks or heritage sites;
• automatic excursion refunds when the operator cancels, but not necessarily when the passenger independently decides conditions are too hot.

Passengers should check four points with the excursion desk before leaving the ship: the amount of walking and shade, whether the coach is air-conditioned, what happens if an attraction closes, and the final cancellation deadline. That is now more meaningful than simply asking whether the ship will reach the port.