Weather in Lisbon in July

Prime time. If you get to pick your dates, July is the one. Highs average 22.2 °C, lows 17.4 °C, and rain falls on 1 days — nothing in the month is working against you.

July is the highest-scoring month of the twelve. The nearest rival is August, and the month at the other end of the year is January.

Rain falls on only 1 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average July reaches 30 °C; the day barely swings — 4.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest July day reached 32.1 °C and the coldest night fell to 14.7 °C.

July is dependably dry, and that reliability is the point: across the twenty years measured, the wettest July on record still only managed 16 mm, and the driest managed 0 mm. There is no meaningful variability to plan around, which makes this one of the few months anywhere that you can build a fixed outdoor itinerary against without a fallback. The wettest single day in twenty years of Julys brought 11 mm. Rain simply is not the variable that decides this trip — heat, crowds and cost are.

Wind sits around 17.5 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 81%, high enough to notice on the warm days without dominating them.

How July sits in the year

Temperatures hold steady either side: 21 °C in June, 22.2 here, 23 in August. Nothing about the timing within the month matters much.

Daylight in July

July is at or near the longest days of Lisbon's year: 14.6 hours of daylight, losing 0.6 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 19.6 °C in July — swimmable, but it takes a moment to commit. The sea peaks at 20.7 °C in September and bottoms out at 15.3 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, May is the trade worth considering — 12 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

July in Lisbon versus nearby

If Lisbon is one option among several, the nearby comparison is worth making. Évora is the weaker option in July — 11.7 °C warmer, the same number of rain days. Leiria is the weaker option in July — 7.2 °C warmer, 1 day more rain.

So: July is the answer for Lisbon. If it is booked out or priced out, August is the next best thing at 0 points behind, and January is the month to keep off the shortlist.

Every month in Lisbon

See all twelve months in Lisbon, or where else to go in July.