Oshima (Hokkaido)

Island Island off Hokkaido's coast, volcanic and forested

Main image
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Oshima-Oshima island aerial photograph.JPG
Oshima (Hokkaido)
41.5118, 139.3586

How to Get to Oshima (Hokkaido) #

Oshima is reached by regional ferry or private boat from Hokkaido ports - schedules are seasonal and subject to weather. Check local ferry operators in Hakodate or nearby coastal towns for connections and timings.

Tips for Visiting Oshima (Hokkaido) #

  • If visiting in summer, take a fishing permit and check local ferry schedules in advance.
  • Oshima (Hokkaido) is remote; bring cash and supplies, as amenities are sparse.
  • Check weather forecasts carefully: fog and rough seas can cancel boat connections.

Best Time to Visit Oshima (Hokkaido) #

Summer and early autumn are the best windows for straightforward travel and outdoor activities.

Summer
Jun-Aug · 15-25°C
Best for sea access, fishing and hiking with mild weather.
Autumn
Sep-Oct · 5-15°C
Calmer seas and clearer air; good for birdwatching.
Winter
Dec-Feb · -10-0°C
Harsh and often inaccessible by boat; not recommended.

Weather & Climate near Oshima (Hokkaido) #

Climate

Oshima (Hokkaido)'s climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with warm summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -5°C to 23°C. Abundant rainfall (1453 mm/year), wettest in September.

Best Time to Visit
AugustSeptemberJune
Temperature & Rainfall
Temperature Range
28°
Warmest Month
-8°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -1°C and lows of -5°C. Significant rainfall (107 mm), mostly overcast skies, and breezy conditions.

27 Poor

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-5° -1°
80%
Humidity
Very Humid

Weather

107 mm
Rainfall
6.9 m/s
Wind
Breezy
0.1
UV Index
Low
9.4h daylight

February

February is freezing with highs of -1°C and lows of -4°C. Regular rainfall (85 mm), mostly overcast skies, and breezy conditions.

29 Poor

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-4° -1°
77%
Humidity
Very Humid

Weather

85 mm
Rainfall
6.5 m/s
Wind
Breezy
0.3
UV Index
Low
10.5h daylight

March

March is cold with highs of 2°C and lows of -2°C. Regular rainfall (85 mm) and mostly overcast skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
-2°
74%
Humidity
Very Humid

Weather

85 mm
Rainfall
5.6 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
11.8h daylight

April

April is cold with highs of 9°C and lows of 3°C. Regular rainfall (96 mm) and mostly overcast skies.

52 Acceptable

Comfort

Feels Like Cold
C
Temperature
80%
Humidity
Very Humid

Weather

96 mm
Rainfall
4.9 m/s
Wind
Light Breeze
1.0
UV Index
Moderate
13.2h daylight

May

May is cool with highs of 13°C and lows of 7°C. Significant rainfall (105 mm) and mostly overcast skies.

52 Acceptable

Comfort

10°
Feels Like Cool
10°C
Temperature
13°
89%
Humidity
Very Humid

Weather

105 mm
Rainfall
4.3 m/s
Wind
Light Breeze
1.3
UV Index
High
14.4h daylight

June

June is cool with highs of 17°C and lows of 12°C. Significant rainfall (109 mm) and mostly overcast skies.

60 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 17°
90%
Humidity
Very Humid

Weather

109 mm
Rainfall
3.7 m/s
Wind
Light Breeze
1.4
UV Index
High
15.0h daylight

July

July is mild with highs of 21°C and lows of 16°C. Significant rainfall (163 mm) and mostly overcast skies.

56 Acceptable

Comfort

19°
Feels Like Mild
19°C
Temperature
16° 21°
91%
Humidity
Very Humid

Weather

163 mm
Rainfall
3.6 m/s
Wind
Light Breeze
1.5
UV Index
Very High
14.7h daylight

August

August is the warmest month with highs of 23°C and lows of 18°C. Significant rainfall (166 mm) and mostly overcast skies.

68 Good

Comfort

21°
Feels Like Mild
21°C
Temperature
19° 23°
85%
Humidity
Very Humid

Weather

166 mm
Rainfall
3.7 m/s
Wind
Light Breeze
1.5
UV Index
Very High
13.7h daylight

September

September is cool with highs of 20°C and lows of 15°C. The wettest month with heavy rain (176 mm) and partly cloudy skies.

62 Good

Comfort

17°
Feels Like Cool
17°C
Temperature
15° 20°
76%
Humidity
Very Humid

Weather

176 mm
Rainfall
4.1 m/s
Wind
Light Breeze
1.1
UV Index
High
12.3h daylight

October

October is cool with highs of 14°C and lows of 9°C. Significant rainfall (123 mm) and mostly overcast skies.

52 Acceptable

Comfort

12°
Feels Like Cool
12°C
Temperature
14°
72%
Humidity
Very Humid

Weather

123 mm
Rainfall
4.8 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
11.0h daylight

November

November is cold with highs of 7°C and lows of 2°C. Significant rainfall (124 mm) and mostly overcast skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
76%
Humidity
Very Humid

Weather

124 mm
Rainfall
5.9 m/s
Wind
Light Breeze
0.2
UV Index
Low
9.7h daylight

December

December is cold with highs of 2°C and lows of -2°C. Significant rainfall (114 mm), mostly overcast skies, and breezy conditions.

36 Poor

Comfort

Feels Like Cold
C
Temperature
-2°
80%
Humidity
Very Humid

Weather

114 mm
Rainfall
6.9 m/s
Wind
Breezy
0.1
UV Index
Low
9.1h daylight

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