What Is the Best Month to Go to Portugal?
The best month to visit Portugal depends on which Portugal you mean: for Coimbra, the university city on the River Mondego, September offers near-peak warmth with thin crowds, and here is the month-by-month evidence from official climate data.
Portugal is a long country with an Atlantic coast, a mountain interior and a university city in the middle of it, and the best month for one is not the best month for another. This page answers the question for Coimbra, Portugal: the city on the River Mondego, about 31,000 students strong by the University's own published count, and home to the hillside campus inscribed by UNESCO in 2013 as "University of Coimbra – Alta and Sofia". The answer below is built on IPMA's 1991 to 2020 climate normals for the Coimbra / Bencanta station, the city's own weather record, not on a coastal proxy from the district, which reaches the Atlantic but is not this city.
What Is the Best Month to Go to Portugal?
For Coimbra, the best month is September, with May as the runner-up. September's mean maximum of 27.4 C is actually higher than June's 26.3 C, the student crowds that pack July and August have gone home, and the heavy autumn rain does not start until October, when the monthly total jumps from 49.9 mm to 114.5 mm. May offers 23.3 C mean maximums and 64.7 mm of rain. July and August are hotter but busiest; November is the wettest month of all.
That answer surprises people who assume June is the sweet spot, and the surprise is checkable. IPMA's normals for station 707, Coimbra / Bencanta, at 40.2134N 8.4552W, show September warmer than June on mean maximum temperature and wetter too, 49.9 mm against 26.0 mm. Nearly twice June's rain, not a third of it, which is the version a careless guide might print. What carries September is not dryness but timing: the rain holds off until October, the heat holds on from summer, and the city empties of tourists.
The University's own calendar reinforces it. The visitor circuit at the Paço das Escolas runs a summer schedule of 09:00 to 20:00 from 1 April to 30 September, so September still gets you the long evenings. The Biblioteca Joanina admits 50 people every 20 minutes, and the University's pages state plainly that entry outside the printed slot is refused. In July and August those slots sell out; in September they are simply easier to get.
For a fuller month-by-month breakdown with the full normals table, the companion guide to Coimbra weather by month carries the detail, and what is special about Coimbra, Portugal explains why the city rewards unhurried visits in the first place.
Which Months Have the Best Weather in Coimbra?
The warmest months are August at a 29.1 C mean maximum and July at 28.5 C, but the most comfortable are September at 27.4 C and May at 23.3 C. August, not July, is the hottest month on both mean and mean maximum, and it averages 10.9 days above 30 C. July is effectively dry at 8.9 mm of rain. The record extremes at the same station are 41.2 C on 7 August 2016 and -4.3 C on 20 January 2017.
Winter is mild but wet. January averages a 15.0 C mean maximum against 113.5 mm of rain, and December is nearly identical. The table below is drawn from IPMA's 1991 to 2020 normals for the Coimbra / Bencanta station, version 1.0 of 2024, and it is the city's own record, taken 3 km from the centre.
| Month | Mean max C | Mean min C | Rain mm | Days 1mm+ rain | Days max 30C+ |
|---|---|---|---|---|---|
| January | 15.0 | 5.2 | 113.5 | 11.3 | 0 |
| March | 19.1 | 7.8 | 75.4 | 9.4 | 0 |
| May | 23.3 | 11.8 | 64.7 | 8.5 | 3.5 |
| June | 26.3 | 14.2 | 26.0 | 3.7 | 6.2 |
| July | 28.5 | 15.6 | 8.9 | 1.7 | 8.9 |
| August | 29.1 | 15.7 | 14.8 | 2.2 | 10.9 |
| September | 27.4 | 14.1 | 49.9 | 5.2 | 7.8 |
| October | 23.2 | 11.9 | 114.5 | 10.3 | 2.0 |
| November | 18.0 | 8.3 | 121.5 | 11.5 | 0 |
Read the table twice before generalising, because two of its facts run against instinct. September is warmer than June and wetter than June. November, not October and not January, is the wettest month at 121.5 mm, marginally ahead of October's 114.5 mm and January's 113.5 mm. Coimbra's rain is autumn and winter rain, arriving in force in October and staying through March.
A walking tour earns its place in any month, but especially in the warm ones. The Coimbra Top Attractions Walking Tour runs 2 hours 30 minutes, is rated 5 stars from 151 reviews and starts from $5.85 per person, and a city built on a hill is best seen with someone who knows which way to climb. Check availability
When Is Coimbra's Peak Season, and When Is It Quiet?
Peak season runs from June through August, when the University's visitor spaces run their 09:00 to 20:00 summer schedule and the Biblioteca Joanina's 50-people-per-20-minute ceiling bites hardest. The quiet months are November through February. The municipality recorded 698,151 overnight stays in 2025, its own published figure, and the tourist tax of 1.00 EUR per night, capped at three nights and charged from age 16, applies year-round with no low-season exemption.
The tax detail matters because it shows the city does not discount for quiet. What the low season offers instead is space: the Sé Velha at 3.00 EUR and Mosteiro de Santa Cruz at 5.00 EUR publish their hours and rarely need queuing in February. The trade is the rain, 121.5 mm in November and 111.3 mm in December, and short days. More of these guides are collected on Coimbra Travel Guide.
There is a second crowd calendar layered on top of the weather one: the academic year. The University publishes about 31,000 students, and the city's rhythm follows them. The visitor circuit closes entirely on 24 May and on 4 October for academic ceremonies, and Mosteiro de Santa Cruz suspends visits on the Cortejo da Queima das Fitas, a moveable Sunday in May. Check those dates before booking a May or early October trip, because a single ceremony can close the hill for the day.
What About the Rain: Which Months Should You Avoid in Coimbra?
Avoid November first, at 121.5 mm the wettest month in the record, then October at 114.5 mm, January at 113.5 mm and December at 111.3 mm. The driest months are July at 8.9 mm, August at 14.8 mm and June at 26.0 mm. October is the pivot: the monthly rain total more than doubles from September's 49.9 mm, and the days with 1 mm or more jump from 5.2 to 10.3.
If rain is the deciding factor, the answer to the broader question of what is the rainy month in Portugal is, for Coimbra specifically, November. The rain is not constant even then, but a November trip should be planned around indoor afternoons. The good news is that the city has them: the University's combined ticket covers the Joanina Library, the Royal Palace, St Michael's Chapel and the Science Museum spaces, and it is valid for two days except the fixed library slot.
A rain plan matters most in October and November, when a wet morning can close off the hill. The one-day itinerary for Coimbra question has a different answer in October than in July, and the honest version accounts for weather risk.
Why September Is the Best Month for Coimbra Specifically
September combines a 27.4 C mean maximum, higher than June's, with a visitor calendar that has slack in it: the Joanina's timed slots are easier to book once the August rush ends, the summer schedule of 09:00 to 20:00 still applies through 30 September, and the rain total of 49.9 mm sits less than half of what October brings. The University closes the circuit on 4 October, which marks the practical end of the easy season.
The month also catches the city at a strange, pleasant halfway point. The students return, so fado, cafés and the student traditions that make Coimbra distinct are running again, but the tourist wave has gone. The river is still warm enough for the Mondego cruise, a 50-minute trip rated 4.2 from 43 reviews from $11 per person, and the evenings are long enough to use them.
The Coimbra Top Attractions Walking Tour, at 2 hours 30 minutes and rated 5 stars from 151 reviews, is a natural first evening in September: the light is soft, the climb is dry, and the operator's live listing shows current times and starting points before you commit to a date.
May is the runner-up, and for some visitors the better choice. It is cooler at a 23.3 C mean maximum, wetter at 64.7 mm, and it carries the one scheduling trap of spring: the Queima das Fitas period closes the University circuit on 24 May and suspends visits at Santa Cruz on the Cortejo Sunday. Plan around those two dates and May is excellent.
| Month | Verdict for Coimbra | Mean max C | Rain mm | Main drawback |
|---|---|---|---|---|
| May | Runner-up | 23.3 | 64.7 | Queima closures on 24 May and the Cortejo Sunday |
| June | Very good | 26.3 | 26.0 | Crowds building |
| July | Hot and busy | 28.5 | 8.9 | Joanina slots sell out far ahead |
| August | Hottest, busiest | 29.1 | 14.8 | 10.9 days above 30 C on average |
| September | Best overall | 27.4 | 49.9 | None decisive |
| October | Turning | 23.2 | 114.5 | Rain more than doubles; circuit closes 4 October |
| November | Avoid for a first visit | 18.0 | 121.5 | Wettest month of the year |
Whatever month you choose, book the Joanina slot before anything else: 50 people every 20 minutes is a hard ceiling, the University states that entry outside the printed time is refused, and online purchase closes 20 minutes before the visit. The 16.50 EUR combined ticket is the only way in, because the Joanina cannot be bought on its own.
Common Questions About the Best Month to Visit Coimbra, Portugal
What is the best month to go to Portugal?
For Coimbra, the best month is September: a 27.4 C mean maximum, higher than June's, thinning crowds and only 49.9 mm of rain before the October jump to 114.5 mm. May is the runner-up if you prefer it cooler, with 23.3 C mean maximums, but check the University's 24 May closure and the Santa Cruz Cortejo Sunday first.
Is September drier than June in Coimbra?
No, and this is the fact guides get backwards. September is wetter than June, 49.9 mm against 26.0 mm, and also warmer, 27.4 C against 26.3 C on mean maximum. What makes September the recommendation is that the heavy autumn rain holds off until October, when the monthly total jumps to 114.5 mm.
What is the hottest month in Coimbra?
August, not July. IPMA's 1991 to 2020 normals for the Coimbra / Bencanta station show August with a 29.1 C mean maximum against July's 28.5 C, and August averages 10.9 days above 30 C. The station's record high is 41.2 C, set on 7 August 2016.
What is the wettest month in Coimbra?
November, at 121.5 mm, marginally ahead of October at 114.5 mm and January at 113.5 mm. July is the driest at 8.9 mm. Coimbra's rain is concentrated in autumn and winter, from October through March.
Does the tourist tax change by season in Coimbra?
No. The tax is 1.00 EUR per guest per overnight stay, capped at three consecutive nights, charged from age 16 and payable to the accommodation, all year round. A two-euro rate was approved as a proposal in July 2026 but the published figure remains 1.00 EUR until the municipality's own tax pages change it.
When is Coimbra too crowded to enjoy?
July and August, when the Biblioteca Joanina's ceiling of 50 people every 20 minutes sells out furthest ahead and the city's 698,151 annual overnight stays are concentrated. September and May give you the same long visitor hours, 09:00 to 20:00 under the summer schedule, with far more slack in the booking calendar.
Choosing the month is really choosing a trade: heat against crowds, rain against space. September is the month where that trade is smallest for Coimbra, and the official numbers, from the city's own weather station, are the reason this site says so.