Guide · Best time

Capri, Italy boat tour in summer, or in the shoulder months?

A Capri, Italy boat tour in summer means warm water and long, dry days, but also the most heat. Here is what the climate data says, month by month, and how to choose your date.

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Editorial team, capriprivateboattour.comUpdated October 18, 2026Read time: 7 min8 sources

This guide's tour Capri: 3-Hour Private Boat Tour with Blue Grotto 4.8 (149 reviews) 3 hoursPrivate groupFrom Marina Grande, Capri from$461 Check availabilityCancel at no cost up to 24 hrs ahead

When to go

01Summer: June to August: highs of 29 to 30.6 °C and 1 to 3 wet days a month at Naples.¹
02September: A high of 25.9 °C, but 6 wet days on average.¹
03October: A high of 22.7 °C, 6 wet days and 11 hours of daylight.¹
04Winter: Mild, with highs near 14 °C, but 8 to 9 wet days a month.¹
05Any month: The Blue Grotto depends on the tides and the weather.²

What the climate says about boat season

The climate station used here is Naples, across the bay, the closest one with monthly records for the gulf. June, July and August are the driest months: July sees an average of 1 day reaching 2.5 mm of rain or more, and 13 mm across the month.¹ June is almost as dry, with 1 wet day and 12 mm.¹

Those are also the warmest months. The average daily high at Naples is 29 °C in June and 30.6 °C in July and August, with lows above 19 °C.¹ On the water the breeze takes the edge off, and the sea has had months to warm, which makes the swim stops a pleasure rather than a test of courage.

Daylight is generous too. In mid-June the sun is up for 15.1 hours, in mid-July for 14.8.¹ That leaves room for a morning boat, an afternoon on the island and a sunset trip on the same day, if you have the energy for it.

The year

A boat year on Capri, with Naples station figures

April

Green and cool

A high of 19 °C and 7 wet days.¹
May

The sweet spot

A high of 24.4 °C and 5 wet days.¹
June to August

Peak summer

Highs of 29 to 30.6 °C, 1 to 3 wet days.¹
September

Warm sea, some storms

A high of 25.9 °C and 6 wet days.¹
October

Quiet and mild

A high of 22.7 °C and 11 hours of daylight.¹
November to March

Unsettled

Up to 9 wet days a month.¹

A Capri, Italy boat tour in summer

A Capri, Italy boat tour in summer is the classic choice, and for good reasons: the sea is at its most inviting and the days are long and dry. If swimming in clear water is the point of your trip, the summer months deliver.

The cost is heat, and company: expect more boats at the popular stops and a wait at the Blue Grotto. With highs above 30 °C in July and August at Naples, shade on the boat and plenty of water matter.¹ Book early, especially for a private boat, and use the free cancellation window to keep flexibility.

Within summer, the timing of your day makes a difference. A morning boat avoids the hottest hours on the water; an afternoon boat catches warmer water and softer light; a sunset boat avoids the midday sun altogether. The private boat this site books takes 3 hours, which fits neatly into either half of the day.

Month by month

Daylight and wet days at the Naples station

Hours without sunDays with precipitationSeason

Each bar is the dark part of a mid-month day; the line counts days on which rain reached 2.5 mm, from 6 to 8 years of NOAA records per month at Naples within 1991 to 2020.¹

The numbers

Climate by month, Naples station

Month	Daylight (h)	Darkness (h)	High / low	Wet days	Blue Grotto hours
Jan	9.6	14.4	14 / 7 °C	8	9:00 to 17:00
Feb	10.6	13.4	14 / 6 °C	6	9:00 to 17:00
Mar	11.8	12.2	17 / 8 °C	4	9:00 to 17:00
Apr	13.2	10.8	19 / 10 °C	7	9:00 to 17:00
May	14.4	9.6	24 / 15 °C	5	9:00 to 17:00
Jun	15.1	8.9	29 / 20 °C	1	9:00 to 17:00
Jul	14.8	9.2	31 / 21 °C	1	9:00 to 17:00
Aug	13.8	10.2	31 / 21 °C	3	9:00 to 17:00
Sep	12.4	11.6	26 / 17 °C	6	9:00 to 17:00
Oct	11	13	23 / 14 °C	6	9:00 to 17:00
Nov	9.9	14.1	18 / 10 °C	9	9:00 to 17:00
Dec	9.3	14.7	14 / 7 °C	9	9:00 to 17:00

From NOAA records at the Naples station, 6 to 8 years per month within 1991 to 2020: daylight at mid-month, the average high and low, and the days when rain reached 2.5 mm.¹ Season according to Italia.it.⁴

Three seasons

Summer, late summer or autumn

Warmest sea

High summer

June to August

High: 29 to 30.6 °C
Wet days: 1 to 3
Daylight: Up to 15.1 hrs

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Fewer crowds

September

Late summer

High: 25.9 °C
Wet days: 6
Daylight: 12.4 hrs

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Calm and mild

October

Autumn

High: 22.7 °C
Wet days: 6
Daylight: 11 hrs

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Decision helper

Which month suits your trip?

Start from what you want from the water

I want to swim as much as possible I want warmth without the crowds I want the longest days I want a quiet island I am visiting in winter

July or August

Highs of 30.6 °C and very few wet days.¹

May or September

Highs of 24.4 °C and 25.9 °C.¹

June

The sun is up 15.1 hours in mid-June.¹

October

A high of 22.7 °C and 11 hours of daylight.¹

A calm, bright day

Mild but wet: 8 to 9 wet days a month.¹

Even in winter, the Amalfi Coast enjoys mild temperatures, especially until the end of the holiday season.

Italia.it (ENIT, Ministry of Tourism)Source 3

A Capri boat tour in September

A Capri boat tour in September often feels like the best of both worlds. At Naples, the average high is still 25.9 °C and the low 17.1 °C, and the sea has had the whole summer to warm.¹ The days are shorter, 12.4 hours of daylight at mid-month, but there is plenty of light for a full day on the water.¹

The catch is the weather. At the station, September brings on average 6 days reaching 2.5 mm of rain and 115 mm over the month, much more than August.¹ Wet days bring wind and swell, and the Blue Grotto depends on the tides and the weather.²

Plan September with a spare day. Book your boat early in your stay, watch the forecast, and use the free cancellation window, 24 hours ahead on the private boat, to move the trip if the sea looks rough. When the weather is kind, September gives you warm water and long, mild days.

Checklist

Picking your boat day

Before you book

Free cancellation up to 24 hours ahead
A spare day in your plans
Morning or afternoon, by season

The evening before

The sea and wind forecast
A layer if it is spring or autumn
Your confirmation and meeting point

Video

Capri in a Day: The Ultimate Day Trip Guide

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A Capri boat tour in October

A Capri boat tour in October is for travelers who value calm over heat. At Naples, the average high is 22.7 °C and the low 14.1 °C, with 11 hours of daylight at mid-month.¹ On a sunny day the water is still pleasant for a quick swim, though less inviting than in summer.

October averages 6 wet days and 81 mm of precipitation at the station.¹ That is less than September and far less than November, which averages 9 wet days and 133 mm.¹ Even so, plan for changeable weather: a light layer for the boat, a spare day in your plans, and the cancellation window in mind.

With shorter days, start earlier. A morning boat leaves time to explore the island on foot before the light fades. The Blue Grotto hours on Italia.it are 9:00 am to 5:00 pm, so a visit fits easily into an October day when the sea allows.⁴ ²

Spring: May is the sweet spot

May is an underrated month for a boat day. At Naples the average high is 24.4 °C and the low 15.1 °C, with 5 wet days and 58 mm of precipitation in the month.¹ The days are long, with 14.4 hours of daylight at mid-month.¹

April is cooler and wetter, with a high of 19 °C and 7 wet days.¹ The sea is cool for swimming, but the coast is green and fresh, and a boat around the island is a fine way to see it. Bring a warm layer, and do not plan your day around a swim.

In spring the island is at its greenest. Capri has a great variety of rare plants, 850 species according to Italia.it.⁵ From the water you see the cliffs covered in green, with the bright colors of spring around the villas above. For photographers, that light and color can beat high summer.

Winter: mild but unsettled

Winter on the gulf is mild. At Naples the average high is 13.9 °C in January and 13.6 °C in December, with lows near 7 °C.¹ Even in winter the Amalfi Coast enjoys mild temperatures, especially until the end of the holiday season.³

For boats, though, winter is unsettled. January averages 8 wet days and 140 mm of precipitation, December 9 wet days and 132 mm.¹ Days are short, 9.3 hours of daylight at mid-December.¹ Check which boats run on your dates, as wind and swell can keep small boats in port.

If you visit in winter, treat a boat trip as a bonus. Check which listings run on your dates, choose a calm, bright day, and keep your plans loose. The island in winter has its own quiet beauty, and Sorrento's coastal climate makes a visit possible at any time of year.⁶

How to choose your date

If swimming is the point, go between June and September. If you want warmth with fewer crowds, aim for May, late September or early October. If you just want to see the coast from the water and do not mind a cooler breeze, the shoulder months can be lovely, with calm, clear days between the unsettled ones.

Whatever the month, the sea has the final say. The Blue Grotto depends on the tides and the weather, and a rough sea can change the route of any boat.² Book with free cancellation, keep a spare day, and check the forecast the evening before. The private boat this site books allows cancellation at no cost up to 24 hours ahead.

Finally, think about the time of day as well as the month. In summer, avoid the midday heat on deck; in spring and autumn, pick the day with the least wind in the forecast. The best day for a boat on Capri is the calm one, and it can come in any month of the season.

Planning around the Blue Grotto and the light

If the Blue Grotto is high on your list, the season matters less than the day. Italia.it lists its hours as 9:00 am to 5:00 pm, Sunday to Saturday, and visits depend on the tides and the weather in every month.⁴ ² A calm, settled spell is what you are looking for, in July as much as in October.

The color inside the grotto changes with the time of day and the weather.⁷ On a bright day it glows; under cloud it is softer. If you have a choice of days, take the sunniest one for the grotto, and keep a cloudier one for a walk on the island or a visit to the Casa Rossa in Anacapri, where 4 Roman statues found in the grotto are on show.⁸

For photographs of the Faraglioni and the cliffs, the low light of early morning and late afternoon is kinder than the midday sun at any time of year. In summer that means an early or a late boat; in the shoulder months the softer light lasts longer through the day. Plan the boat around the light you want, and the rest of the island around the boat.

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