The Eiffel Tower is slightly taller in summer
Warm metal makes the Eiffel Tower expand slightly in summer and contract in winter, but the change is only a few millimeters.
Claim checked · Quick check · · 2 min read · 5 sources · 1 read
Asked as: “Is the Eiffel Tower taller in summer than in winter?”
The short answer
The Eiffel Tower is slightly taller in summer, but only by a tiny amount. The official Eiffel Tower site says warm weather makes the metal structure expand and that it can become “a few millimeters taller,” while winter cold makes it contract again. NIST explains that this is normal thermal expansion in solids, where small temperature changes cause proportional length changes. ¹⁴⁵
Key facts
- The Eiffel Tower’s current listed height is 330 meters, including antennas, as of the official tower figures and height history pages. ²³
- The tower’s official site says heat can make it “a few millimeters taller,” and cold weather can make it lose a few millimeters. ¹
- On sunny days, the top can trace a curve about 15 centimeters in diameter because one side warms more than the others. ¹
- NIST describes thermal expansion as a standard property of solids: a small temperature change causes a linearly related change in length. ⁴⁵
- The tower’s seasonal size changes are described by the official site as natural and imperceptible to visitors. ¹
Why summer makes it taller
Yes, but only because metal expands when it gets warmer. The Eiffel Tower is made of puddled iron, and its official site says it reacts to high summer temperatures by growing slightly, then contracts in winter as temperatures fall. That is the same basic physics NIST describes for solids generally. ¹⁴⁵
How much it changes
The seasonal difference is tiny: the official Eiffel Tower page describes the change as a few millimeters, not anything a visitor would notice. The tower’s permanent height changes are a separate issue; its current 330-meter total includes antennas added over time, with a major 6-meter antenna addition completed in 2022. ¹²³
What people often confuse it with
The Eiffel Tower also moves a little during the day because sunlight warms one side more than the others. The official site says the top can shift in a circular path about 15 centimeters wide on a clear day. That is a sideways lean, not the same thing as the seasonal summer-vs-winter height change. ¹
Frequently asked questions
How much taller is the Eiffel Tower in summer?
Does the Eiffel Tower get shorter in winter?
Sources
Numbered to match the footnotes above. Every link opens the original.
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Research trail6 searches · 40 pages consulted · deep pass on September 25, 2026
Searches run
- › Eiffel Tower taller in summer than winter thermal expansion official
- › Eiffel Tower thermal expansion summer winter official height
- › Eiffel Tower height changes with temperature thermal expansion article
- › thermal expansion of iron official source heat causes length increase NIST
- › metal thermal expansion official educational source
- › Eiffel Tower height 330 meters official website
Pages consulted
- toureiffel.pariswhy does eiffel tower change size
- toureiffel.parispourquoi la tour eiffel change de taille
- toureiffel.parissnow and ice eiffel tower
- toureiffel.pariscontact
- toureiffel.parisattendance
- toureiffel.parisrates opening times
- toureiffel.parispor que la torre eiffel varia de tamano
- toureiffel.pariswhat there do eiffel tower december
- toureiffel.parisour tips visiting eiffel tower summer
- toureiffel.parisplanning smooth visit
- toureiffel.parisfirst floor
- toureiffel.pariswhat there do eiffel tower
- toureiffel.parisreglement visite web mai2026 en
- toureiffel.parisen 10 la tour en chiffres
- toureiffel.parisen 02 il etait une fois
- toureiffel.parisvisiting conditions eiffel tower eng
- toureiffel.paris300 330 meters story towers height
- city-paris.frvisit the eiffel tower
- toureiffel.paristoureiffel.paris
- skyscrapercenter.comskyscrapercenter.com
- toureiffel.parischiffres cle
- parisjetaime.comexplore the eiffel tower a1068
- msed.nist.govsolder paper
- nist.govcircular bureau standards no 486thermal expansion solids
- and 16 more
How this brief was made
First written on September 25, 2026, then re-researched in a deeper pass with full web search on September 25, 2026 (gpt-5.4-mini). It cites 5 sources and reached the verdict True with an evidence strength of 97/100. The best available evidence supports the claim. Facts change; if a source has moved or the record has shifted, tell us.
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