Naoshima weather in April

In April, Naoshima sees average daytime highs of 17°C and overnight lows near 12°C, with 104 mm of rain across 10.4 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 19°C by the end. The sky is clear or mostly clear about 33% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 18 min by month's end. Set against the rest of the year, April is Naoshima's 5th-clearest and 6th-windiest month. For the whole year in context, see Naoshima's year-round climate.

Daytime high
17°
7th warmest
Overnight low
12°
5th coldest
Rainfall
104 mm
10.4 wet days
Daylight
12 h 54 min
5:38 AM – 6:30 PM
Cloud cover
59%
5th clearest
Wind
14 km/h
6th windiest
Solar energy
5.29 kWh/m²
Travel score
5.3
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 19°C by the end.

A typical April day in Naoshima reaches about 17°C in the afternoon and slips back to 12°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 20°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11510
21510
31510
41510
51511
61611
71611
81611
91611
101611
111612
121612
131712
141712
151712
161712
171712
181713
191713
201813
211813
221813
231813
241814
251814
261814
271914
281914
291914
301915

How April really feels in Naoshima

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Naoshima weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5810.70.6102.0
Feb10° / 619.60.510.72.2
Mar13° / 9310.4011.73.5
Apr17° / 12°10410.4012.85.3
May21° / 17°1219.6013.86.5
Jun24° / 21°15811014.36.3
Jul28° / 24°15911.2014.15.9
Aug29° / 26°867.1013.35.6
Sep27° / 23°15010.2012.26.4
Oct22° / 18°1268.8011.17.0
Nov17° / 12°607.3010.25.6
Dec12° / 609.90.19.73.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25248
35248
45248
55149
65149
75050
85050
94951
104951
114951
124852
134654
144654
154654
164555
174555
184555
194555
204555
214555
224654
234654
244753
254753
264852
274753
284852
294852
304852

Chance of precipitation in April

Any precipitation

Naoshima gets around 104 mm of rain over 10.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
333
433
534
634
734
835
935
1035
1135
1235
1336
1436
1536
1636
1736
1836
1936
2035
2135
2234
2334
2433
2533
2632
2732
2831
2931
3030

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
193610
293610
392710
492710
591810
691810
790910
890910
9891010
10891010
11881110
12871210
13861310
14841420
15831520
16821620
17811720
18801820
19781930
20772030
21752131
22732241
23712441
24692551
25662761
26652861
27632971
28613081
29593191
305732101

Wind in April

Winds average 14 km/h in April.

Across April, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over April. Sunrise moves from 5:59 AM to 5:21 AM, and sunset from 6:18 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:596:18
212.45:586:19
312.45:566:20
412.45:556:21
512.55:536:21
612.55:526:22
712.55:516:23
812.65:496:24
912.65:486:25
1012.65:466:25
1112.75:456:26
1212.75:446:27
1312.85:426:28
1412.85:416:29
1512.85:406:29
1612.95:386:30
1712.95:376:31
1812.95:366:32
1913.05:346:32
2013.05:336:33
2113.05:326:34
2213.15:316:35
2313.15:306:36
2413.15:286:36
2513.25:276:37
2613.25:266:38
2713.25:256:39
2813.35:246:40
2913.35:236:40
3013.35:216:41

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.29 kWh/m².

For context, solar energy here swings from a low near 2.43 kWh/m² to a high of 5.63 kWh/m² in May across the year — April's 5.29 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in April

Hazard calendar for Naoshima

In seasonPeak

In April, Naoshima sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Naoshima sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Naoshima?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.3
Sightseeing
8th-best month of the year
1.3
Beach & pool
7th-best month of the year

April is a reasonable time to visit Naoshima for sightseeing.

What to pack for Naoshima in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Naoshima sees daytime highs around 17°C and nights near 12°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Naoshima in April

The nearest coast averages about 15°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 km away) is warmest in August at about 28°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 12 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct23Refreshing
Nov20Cool
Dec16Cool

UV index in Naoshima in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Naoshima peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 22UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Naoshima in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Naoshima is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1422 µg/m³Oct 1613 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Naoshima?

Naoshima sits at 34.5°N, 134.0°E, 0 m above sea level, in Japan. The nearest listed city is Tamano, 8.0 km away.

Topography around Naoshima

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Naoshima.

Within 3 km, the terrain around Naoshima has only modest variations in elevation — a maximum elevation change of 114 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 486 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,946 m.

The land around Naoshima is covered by water (70%) and trees (21%) within 3 km, water (61%) and trees (25%) within 16 km, and trees (56%) and water (30%) within 80 km.

3 km
114 m
16 km
486 m
80 km
1,946 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Tamano 8.0 km · Takamatsu 15 km · Sakaidechō 21 km · Okayama 22 km · Shido 22 km · Utazu 24 km · Hiragi 24 km · Takinomiya 25 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Naoshima (34.4608°, 133.9972°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).