Your July weather guide

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Weather in Sardinia in July

July is a good time to visit Sardinia if you want hot, dry weather and a sea warm enough for swimming. Average daytime highs reach 30°C, nights stay around 21°C, and the sea averages about 24°C. The catch is the heat: this suits a holiday built around swimming, shade and unhurried afternoons better than being active all day. For a UK traveller, expect a clear step up from summer at home.

Long-term climate averages for Olbia (Costa Smeralda), not a forecast · 1991-2020

Sardinia, month by month

Your snapshot

At a glance

The useful details for Olbia (Costa Smeralda).

Average daytime high
30.0°C
9 in 10 days stay below 33°C
Average night-time low
21.0°C
coldest 10% of nights: 19°C or lower
Compared with London
+8.2°C
London averages 21.8°C in July
Sea temperature
23.8°C
year to year: 23°C to 25°C
Sunshine per day (est.)
12.7h
86% of 14.7 h of daylight
Rainy days (1 mm+)
1
7 mm over the month
Humidity
61%
Days over 25°C
96%
54% over 30°C
Record high 1991-2020
38.9°C
2009-07-23
Record low 1991-2020
15.4°C
2000-07-17
Flight from London
≈ 2 h 24 min
1358 km, short-haul (estimate for a direct flight)

Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.

How July compares

July is the 2nd warmest month of the year in Sardinia and ranks 38th of 134 destinations we compare for July - see where else is hot in July. Within Italy it is 3rd of 16 (Italy in July). Against London's average high of 21.8°C in July, Sardinia is 8.2°C warmer by day and 7.5°C warmer at night.

Daytime and night-time in July

The typical July day in Sardinia peaks at 30.0°C, but that is an average: the warmest 10% of days reach 33.3°C or more. About 96% of days top 25°C and 1 in 2 pass 30°C. Nights average 21.0°C; one night in ten drops to 18.5°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest July day here reached 38.9°C (2009-07-23) and the coldest night 15.4°C (2000-07-17).

Rain in July

Dry (3 rainy days or fewer): about 1 days with 1 mm or more, 7 mm in total. Year to year it varies a lot - the wettest July was 2012 with 46 mm, the driest 1998 with 0 mm. Humidity averages 61%.

Sea temperature in July

The sea averages 23.8°C - warm enough to swim (22°c+). Depending on the year it ranges from 22.5°C to 25.2°C. For the warmest sea here, come in August (25.2°C).

Sunshine and daylight

Around 12.7 hours of sunshine a day (estimated from cloud cover), 14.7 hours of daylight: the sun rises about 06:03 and sets about 20:53 local time in mid-July. Average cloud cover is 13%.

Is July a good time to visit Sardinia?

Yes - it is one of the better months: hot days, little rain and long sunny days. The best months for Sardinia on our scoring are July, August, June; months averaging 25°C or more: Jun, Jul, Aug, Sep.

Plan around the afternoon heat

July's heat is fairly dependable rather than an occasional bonus: 96% of days reach 25°C, while 54% reach 30°C. The hottest days can make long stretches outdoors uncomfortable, with the warmest 10% reaching 33.3°C or more. Put walking and anything energetic earlier in the day, then leave room for shade or an indoor break around midday. Light, loose clothing, a hat and sunscreen belong in your daily bag, and air conditioning is a sensible accommodation priority if warm nights affect your sleep. July suits travellers who enjoy proper heat; it is less appealing if you want to stay active outdoors without adjusting your pace.

Good swimming weather, with little rain to work around

The sea averages 23.8°C, with a year-to-year range of 22°C to 25°C, making July a sensible choice if swimming matters to your holiday. There is little reason to build your plans around wet weather: July averages about 1 rainy day, though that is not a guarantee of a rain-free stay. Sunshine averages 12.7 hours within 14.7 hours of daylight, so there is plenty of scope to spend time outside without doing everything at midday. Use that flexibility to take a break when the heat feels strongest and return outdoors later. Pack mainly for sun and swimming, but keep plans flexible if a shower does arrive.

A little perspective

Sardinia through the year

July is highlighted. See how it compares with the rest of the year.

Monthly climate averages

Swipe sideways on a phone; the month stays in view.

Sardinia monthly climate averages, 1991-2020; July is the selected month.
MonthDayNightSeaSun/dayRain mmRainy daysDays 25°C+
January12.9°C7.4°C13.8°C4.45680%
February13.2°C7.1°C13.3°C5.54380%
March15.4°C8.8°C13.6°C6.35680%
April18.0°C10.7°C14.6°C7.15380%
May22.1°C14.2°C17.3°C8.444617%
Junebest26.8°C18.1°C20.9°C11.117369%
JulySelectedbest30.0°C21.0°C23.8°C12.77196%
Augustbest30.3°C21.5°C25.2°C11.212298%
September25.8°C18.6°C23.6°C7.837664%
October21.9°C15.5°C20.9°C5.765816%
November17.1°C11.7°C17.9°C4.378100%
December13.9°C8.8°C15.2°C4.26290%

Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.

Day, night and sea

Monthly average temperatures, 1991-2020

  • Day
  • Night
  • Sea
Bars show average daytime highs and night-time lows; circles mark the average sea temperature. Same scale for every month. Exact values are in the table.

Best months here

On warmth, low rainfall and sunshine, start with these.

Keep exploring

Similar in July

Closest matches on daytime temperature, sea temperature and sunshine, in other countries.

A little more detail

Sardinia in July FAQs

Plain answers, grounded in the averages.

Is Sardinia hot in July?

Sardinia is hot in July: the average daytime high is 30.0°C and nights average 21.0°C. About 96% of July days reach 25°C or more.

Can you swim in the sea in Sardinia in July?

The sea around Sardinia averages 23.8°C in July, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 23°C to 25°C depending on the year.

How much does it rain in Sardinia in July?

Sardinia sees about 1 rainy days (1 mm or more) and 7 mm of rain in a typical July. The wettest July between 1991 and 2020 was 2012 (46 mm) and the driest was 1998 (0 mm).

How sunny is Sardinia in July?

Sardinia gets around 12.7 hours of sunshine a day in July out of 14.7 hours of daylight (estimated from average cloud cover).

How does Sardinia compare with the UK in July?

Sardinia is on average 8.2°C warmer than London by day in July (30.0°C against 21.8°C).

What is the hottest July on record in Sardinia?

Between 1991 and 2020 the hottest July day in Sardinia reached 38.9°C on 2009-07-23, and the coldest night dropped to 15.4°C on 2000-07-17.

How much hotter is Sardinia than London in July?

Sardinia's average daytime high is 30°C, compared with London's 21.8°C - a difference of 8.2°C. That is enough to change how you plan your day: allow more shade breaks and avoid treating midday as the best time for a long walk.

Will I need warm clothes for the evenings?

Light clothing should cover most evenings, with average night lows of 21°C. A light layer is still useful if you feel the cold: the coolest 10% of nights fall to 18.5°C or lower. You do not need to pack mainly for chilly weather.

About these averages

ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020

Averages computed from daily values at Olbia (Olbia (Costa Smeralda)). Sea temperature from the nearest 5 km sea cell, 2.3 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather