Kansai Weather Guide

Shirahama & Nanki Weather & What to Wear

Shirahama, Kumano Kodo, Nachikatsuura, Kushimoto

Shirahama, known for the white sand of Shirarahama Beach and its hot springs, and the southern Kii Peninsula, home to the UNESCO World Heritage Kumano Kodo pilgrimage trails. Thanks to the warm Kuroshio Current, winters are mild, and spring arrives here earlier than anywhere else in Kansai. It's also a rainy area (temperatures are for Nanki-Shirahama Airport).

January low
3.6℃
August high
31.3℃
Max snow depth
—
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Forecast

Forecast: Today & the Next 7 Days

JMA forecast issued Oct 22, 11 AM

Every 3 Hours: Today & Tomorrow

  1. Today
    12 PM
    Sunny
    25°
    ☂ 0%
    6–9m/s
  2. 3 PM
    Sunny
    23°
    ☂ 0%
    6–9m/s
  3. 6 PM
    Sunny
    21°
    ☂ 0%
    6–9m/s
  4. 9 PM
    Sunny
    19°
    ☂ 0%
    6–9m/s
  5. Tomorrow
    12 AM
    Sunny
    18°
    ☂ 0%
    6–9m/s
  6. 3 AM
    Sunny
    18°
    ☂ 0%
    6–9m/s
  7. 6 AM
    Sunny
    18°
    ☂ 10%
    6–9m/s
  8. 9 AM
    Cloudy
    22°
    ☂ 10%
    6–9m/s
  9. 12 PM
    Cloudy
    23°
    ☂ 40%
    6–9m/s
  10. 3 PM
    Cloudy
    23°
    ☂ 40%
    6–9m/s
  11. 6 PM
    Rain
    22°
    ☂ 80%
    6–9m/s
  12. 9 PM
    Rain
    21°
    ☂ 80%
    6–9m/s

Weather and wind are for the wider area; temperature is for the main forecast point. Chance of rain is for the 6-hour period.

  1. Today
    10/22(Thu)
    Sunny
    26°/20°
    Observed: 20°
    ☂ 0%
  2. Tomorrow
    10/23(Fri)
    Cloudy, then rain
    24°/17°
    ☂ 80%
  3.  
    10/24(Sat)
    Rain
    —/—
    ☂ 80%
  4.  
    10/25(Sun)
    Cloudy, brief rain
    —/—
    ☂ 70%
    Reliability B
  5.  
    10/26(Mon)
    Cloudy, rain at times
    —/—
    ☂ 60%
    Reliability B
  6.  
    10/27(Tue)
    Cloudy, brief rain
    —/—
    ☂ 60%
    Reliability B
  7.  
    10/28(Wed)
    Sunny, cloudy at times
    —/—
    ☂ 20%
    Reliability A
  • ☂ Chance of rain
  • From day 3, the weekly forecast covers a wider prefecture-level area.
  • Reliability of the weekly forecast (A: high, B: fairly high, C: fairly low)
  • "Observed" is the temperature measured so far today by JMA weather stations (AMeDAS), not a forecast.
  • Temperatures from day 3 are not shown because the weekly forecast has no point for this area.
  • Source: Japan Meteorological Agency (weather forecast)
Best Season

Best Time to Visit Shirahama & Nanki

For the beach

July and August are beach season at Shirarahama. Enjoy clear water and white sand.

For the Kumano Kodo

Spring and autumn aren't too hot — just right for hiking mountain trails.

Climate

Shirahama & Nanki Temperature & Snow Through the Year

Monthly high / low temperature (°C)

HighLow
05101520253035JanFebMarAprMayJunJulAugSepOctNovDec31.3℃3.6℃Jan High 10.7℃ / Low 3.6℃Feb High 11.9℃ / Low 4.0℃Mar High 15.1℃ / Low 6.6℃Apr High 19.1℃ / Low 10.8℃May High 23.4℃ / Low 15.4℃Jun High 25.9℃ / Low 19.5℃Jul High 29.3℃ / Low 23.5℃Aug High 31.3℃ / Low 24.7℃Sep High 28.5℃ / Low 21.5℃Oct High 24.0℃ / Low 16.5℃Nov High 18.6℃ / Low 10.8℃Dec High 13.3℃ / Low 5.8℃
Month by Month

Month-by-Month Weather & What to Wear

MonthHighLowPrecip.Max snow depthWhat to wear
Jan10.7℃3.6℃60.6mm—Warm jacketLight down or winter coat, sweater
Feb11.9℃4.0℃99.9mm—Warm jacketLight down or winter coat, sweater
Mar15.1℃6.6℃138mm—Long sleeves + jacketLong sleeves with a light jacket or hoodie
Apr19.1℃10.8℃136.5mm—Long sleeves + jacketLong sleeves with a light jacket or hoodie
May23.4℃15.4℃167mm—T-shirt + layerT-shirt, plus light long sleeves for mornings and evenings
Jun25.9℃19.5℃264.9mm—T-shirtT-shirt, with a light layer for evenings and air conditioning
Jul29.3℃23.5℃279.6mm—T-shirtT-shirt, with a light layer for evenings and air conditioning
Aug31.3℃24.7℃188.3mm—T-shirtT-shirt, with a light layer for evenings and air conditioning
Sep28.5℃21.5℃259.8mm—T-shirtT-shirt, with a light layer for evenings and air conditioning
Oct24.0℃16.5℃231.3mm—T-shirt + layerT-shirt, plus light long sleeves for mornings and evenings
Nov18.6℃10.8℃115.3mm—Long sleeves + jacketLong sleeves with a light jacket or hoodie
Dec13.3℃5.8℃81.4mm—Warm jacketLight down or winter coat, sweater

Clothing tips are based on the normal high temperature and snow depth. Bring an extra layer for mornings and evenings.

Where to Stay · Agoda

Places to Stay near Shirahama & NankiPR

Prices and availability are shown on Agoda.

Seasons

Shirahama & Nanki Through the Seasons

🌸

Spring

Mar–May

Warm, with highs of about 15°C even in March. April and May are ideal for walking the Kumano Kodo.

☀️

Summer

Jun–Aug

Highs of 29–31°C. It's beach season, but June and July are rainy, and typhoons are also a concern.

🍁

Autumn

Sep–Nov

September is peak typhoon season. October and November are sunny and comfortable — recommended for walking the Kumano Kodo.

❄️

Winter

Dec–Feb

Highs of 11–13°C, making it one of the warmest areas in Kansai. A perfect season for hot springs.

Events

Events & festivals in Shirahama & Nanki

Photo coming soonJuly

Nachi Fire Festival (Nachi no Ogi Matsuri)

Kansai ・ Shirahama & Nanki

Every year on July 14 (held during the day; Yoimiya offering events are also held the day before, on the 13th)

2027: Jul 14 (held every year on July 14)

Onsen

Onsen towns in Shirahama & Nanki

♨ Onsen

Nanki-Shirahama Onsen

Kansai ・ Shirahama, Wakayama

♨ Day use Age 3 and up ¥500 (as of October 2026)

♨ Onsen

Nanki-Katsuura Onsen

Kansai ・ Nachikatsuura, Wakayama

♨ Day use Adults ¥2,500, children (age 3 to elementary school) ¥1,250, towel included (as of October 2026)

Private baths
Attractions

Attractions in Shirahama & Nanki

Zoo

Adventure World

Kansai ・ Shirahama, Wakayama

A theme park in Nanki-Shirahama that combines a zoo, an aquarium, and an amusement park. With Safari World for land animals, Marine World for sea creatures, a petting area, and the "Play Zone" amusement park, it easily fills a full day. All four giant pandas left for China in June 2025, so the highlights now center on penguins, the safari, and marine shows.

Travel Passes

Travel passes you can use in Shirahama & Nanki

🚄 JR

Japan Rail Pass

Nationwide ・ Three types: 7, 14 or 21 days. The period of use cannot be extended or changed

From ¥50,000

Plan Your Trip

Plan Your Shirahama & Nanki TripPR

Other Areas

Weather in Other Areas

Back to the Kansai Weather Guide (all months & areas) →

Source: Japan Meteorological Agency (climate normals 1991-2020). Compiled by tripuuu.log. Temperature and snow figures are normals from the Nanki-Shirahama station; actual weather varies from year to year.