30YearWeather
Lisbon
When to avoid visiting Lisbon, Portugal
Seasonal Comparison

Least Favorable Months in Lisbon

Based on 30 years of NASA satellite data, Lisbon enjoys relatively good weather year-round. However, if you're comparing months, December, January, November are the least favorable — though still perfectly visitable.

December61/100January62/100November63/100

Good news: Lisbon has no truly bad months!

With a score of 61/100, even December(the "worst" month) is still a reasonable time to visit. These months are simply the least favorable compared to other months in Lisbon, not objectively bad. Many travelers enjoy visiting during these periods and benefit from lower prices and fewer crowds.

Why December is the Least Favorable (But Still Okay) Time to Visit Lisbon

Is December a Good Time to Visit Lisbon?

👌Good option with minor considerations
Short Answer

Don't expect beach weather in Lisbon's December: 15.7°C cold seas despite 15°C air temps. Coastal scenery remains beautiful, just pack warm layers.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

83% average humidity

Rough sea conditions

1.57m average wave height - Surfers Only

Cold sea - swimming challenging

15.7°C sea temperature - Polar Plunge

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Zika

Shoulder season - balanced conditions

57% of peak - good value with moderate crowds

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💑
    Honeymoon couples

    Wedding score 91/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

  • 🎯
    Adventure seekers

    1.57m waves - good for surfing and water sports

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only 15.7°C - too cold for comfortable swimming

  • 👴
    Elderly travelers

    83% humidity creates difficult conditions

930 observations30-year historical data
Confidence: 99%

Key Challenges During These Months

Challenging Conditions

Weather conditions may limit outdoor activities and sightseeing options

Months to Avoid: Detailed Breakdown

Worst61

December

Very high humidity, Rough sea conditions

View details
2nd Worst62

January

Very high humidity, Rough sea conditions

View details
3rd Worst63

November

Very high humidity

View details

Looking for the Best Time Instead?

Discover the optimal months to visit Lisbon with ideal weather conditions, fewer crowds, and better prices.

Best Time to Visit Lisbon

Frequently Asked Questions

When should I avoid visiting Lisbon?

Based on 30 years of data, the most challenging months are December, January, November. Primary concerns include: very high humidity, rough sea conditions.

What is the worst month to visit Lisbon?

December is typically the most challenging month, scoring only 61/100 in our travel conditions analysis.

Can I still visit during these months?

Yes, many travelers still visit during challenging months. Come prepared with appropriate gear, flexible bookings, and backup plans. Lower prices and fewer tourists can offset the weather challenges.

Are hotels cheaper during these months?

Often yes. Low season typically means reduced hotel rates, easier reservations, and fewer crowds at popular attractions. Some travelers prefer this trade-off.