Apostle Islands

Island Lake Superior archipelago forming Apostle Islands National Lakeshore

An archipelago in Lake Superior noted for sea caves, historic lighthouses and island kayaking; visitors come for boat tours, camping and winter ice formations when conditions allow.

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The Apostle Islands are an archipelago of islands in western Lake Superior off the coast of Bayfield, Wisconsin, comprising 22 principal islands and many smaller islets. Many of the islands are part of Apostle Islands National Lakeshore and include historic lighthouses, sea caves and backcountry campsites.

Popular activities include boat tours, sea-kayaking around the islands’ sandstone cliffs, visiting restored lighthouses and hiking on island trails; Sand Island and Stockton Island offer established backcountry campsites. The sandstone sea caves along parts of the shoreline are noted features that attract paddlers in summer and, in very cold winters, form ice structures that draw visitors when conditions permit.

The islands have historical and cultural associations with Ojibwe people and later 19th-century maritime activity; the national lakeshore was designated in 1970 to protect natural and historic resources.

The archipelago lies offshore from Bayfield, Wisconsin, in Lake Superior and is reached by ferry and private boat services operating from Bayfield and nearby harbors.

  • Number and protection: The archipelago includes 22 islands and is managed largely as Apostle Islands National Lakeshore, established in 1970.
  • Sea caves and seasons: Sea caves along the islands' sandstone cliffs are best seen by kayak or boat in summer; in very cold winters, formed ice can allow shoreline walking to view caves but conditions are highly variable and unsafe at times.

What to See #

  • Devils Island: Devils Island - features a historic lighthouse and trails; often visited by boat and used as a landing point for day hikes.
  • Raspberry Island: Raspberry Island - site of a restored lighthouse and short walking trails that lead to the lighthouse and shoreline viewpoints.
  • Sand Island: Sand Island - contains campgrounds, trails and the Sand Island Lighthouse; popular for overnight backcountry camping within the national lakeshore.
  • Stockton Island: Stockton Island - the largest island in the group with inland bays, sand dunes and marked trails; used for hiking and wildlife viewing.
Apostle Islands
46.9383, -90.6530
Park land open year-round; visitor centers seasonal (see NPS site)
Free (National Park); ferry and boat tour costs vary (approx. $25-$60)

How to Get to Apostle Islands #

Access is by water from Bayfield, Wisconsin. Regular ferries and private charter boats operate in summer from Bayfield’s marina (about a 20-45 minute crossing depending on destination). Kayakers launch from public boat ramps; seasoned paddlers can island-hop, but trip planning must consider Lake Superior’s fickle weather.

Tips for Visiting Apostle Islands #

  • Book boat tours in advance during summer; glass-bottom and sea-cave trips fill quickly.
  • If visiting sea caves, go with a licensed guide who monitors Lake Superior's winds-conditions change rapidly.
  • In winter, the famed ice caves form only in cold, calm conditions; check National Park advisories before making plans.

Best Time to Visit Apostle Islands #

Late summer is best for boat access and camping; winter offers unique ice spectacles but requires careful planning and local guidance.

Summer
June-August · 10-22°C
Boat tours, kayaking, and camping are at their peak; warm days and long evenings.
Winter
December-February · -15-0°C
When conditions allow, spectacular ice formations and frozen sea caves form along sandstone cliffs-but access can be hazardous.

Weather & Climate near Apostle Islands #

Climate

Apostle Islands's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -14°C to 24°C. Moderate rainfall (792 mm/year).

Temperature & Rainfall
Temperature Range
24°
Warmest Month
-15°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -5°C and lows of -14°C. Moderate rainfall (38 mm).

Comfort

-10°
Feels Like Freezing
-10°C
Temperature
-15° -5°

Weather

38 mm
Rainfall
4.0 m/s
Wind
Light Breeze

February

February is freezing with highs of -3°C and lows of -14°C. The driest month with just 25 mm.

Comfort

-8°
Feels Like Freezing
-8°C
Temperature
-14° -3°

Weather

25 mm
Rainfall
4.0 m/s
Wind
Light Breeze

March

March is freezing with highs of 2°C and lows of -8°C. Moderate rainfall (48 mm).

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-8°

Weather

48 mm
Rainfall
3.8 m/s
Wind
Light Breeze

April

April is cold with highs of 8°C and lows of -2°C. Moderate rainfall (54 mm).

Comfort

Feels Like Cold
C
Temperature
-2°

Weather

54 mm
Rainfall
3.8 m/s
Wind
Light Breeze

May

May is cold with highs of 15°C and lows of 3°C. Regular rainfall (85 mm).

Comfort

Feels Like Cold
C
Temperature
15°

Weather

85 mm
Rainfall
3.6 m/s
Wind
Light Breeze

June

June is cool with highs of 20°C and lows of 8°C. Regular rainfall (95 mm).

Comfort

14°
Feels Like Cool
14°C
Temperature
20°

Weather

95 mm
Rainfall
3.0 m/s
Wind
Light Breeze

July

July is mild with highs of 24°C and lows of 12°C. Regular rainfall (85 mm).

Comfort

18°
Feels Like Mild
18°C
Temperature
12° 24°

Weather

85 mm
Rainfall
2.8 m/s
Wind
Calm

August

August is the warmest month with highs of 23°C and lows of 13°C. The wettest month with heavy rain (103 mm).

Comfort

18°
Feels Like Mild
18°C
Temperature
13° 23°

Weather

103 mm
Rainfall
2.8 m/s
Wind
Calm

September

September is cool with highs of 19°C and lows of 9°C. Regular rainfall (93 mm).

Comfort

14°
Feels Like Cool
14°C
Temperature
19°

Weather

93 mm
Rainfall
3.2 m/s
Wind
Light Breeze

October

October is cold with highs of 12°C and lows of 4°C. Moderate rainfall (68 mm).

Comfort

Feels Like Cold
C
Temperature
13°

Weather

68 mm
Rainfall
3.8 m/s
Wind
Light Breeze

November

November is cold with highs of 5°C and lows of -3°C. Moderate rainfall (54 mm).

Comfort

Feels Like Cold
C
Temperature
-3°

Weather

54 mm
Rainfall
4.0 m/s
Wind
Light Breeze

December

December is freezing with highs of -2°C and lows of -10°C. Moderate rainfall (44 mm).

Comfort

-6°
Feels Like Freezing
-6°C
Temperature
-10° -2°

Weather

44 mm
Rainfall
4.1 m/s
Wind
Light Breeze

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