Santa Rosa Island (California)
Island Largest Channel Island in Santa Barbara Channel, rugged wilderness
Part of Channel Islands National Park off California, Santa Rosa Island draws hikers, campers and sea‑kayakers to sea cliffs, endemic plants and offshore wildlife; visitors arrange permits for overnight stays and guided landings.
Santa Rosa Island is one of the Channel Islands off the coast of southern California and is administered as part of Channel Islands National Park.
Indigenous peoples of the Channel Islands, including the Chumash, used the islands for millennia; later use included ranching and other activities after European contact. The island and its surrounding marine environment were designated for federal protection as part of Channel Islands National Park and an associated marine sanctuary.
Santa Rosa Island lies in the Pacific Ocean off the coast of California within Santa Barbara County and is one of the northern Channel Islands group managed by the National Park Service.
- Access and management: Access is typically by park concession boat or private vessel; the island is managed as part of Channel Islands National Park and the surrounding waters are in the Channel Islands National Marine Sanctuary.
How to Get to Santa Rosa Island (California) #
Access is by boat only-regular concession boats depart from Ventura Harbor, Oxnard, or Channel Islands Harbor (boat operators and schedules vary seasonally). The island is part of Channel Islands National Park; visitors should reserve boat space and (if camping) backcountry permits via the National Park Service or concessionaire in advance.
Tips for Visiting Santa Rosa Island (California) #
- Book the tourist boat from Ventura or Oxnard at least a week in advance in high season; some operators run overnight camping trips that must be reserved early.
- If hiking the island's trails, download GPX tracks-some trail junctions are poorly signed.
- There are no services on Santa Rosa; bring food, water, and a durable shelter if camping.
Best Time to Visit Santa Rosa Island (California) #
Spring and autumn are best for mild weather and wildflowers (spring) or fewer crowds (autumn); summer offers warmer seas but more visitors and coastal fog at times.
Weather & Climate near Santa Rosa Island (California) #
Santa Rosa Island (California)'s climate is classified as Warm-Summer Mediterranean - Warm-Summer Mediterranean climate with mild summers (peaking in September) and cool winters (coldest in April). Temperatures range from 6°C to 23°C. Semi-arid with limited rainfall with a pronounced dry season.
January
January is cool with highs of 17°C and lows of 7°C. Regular rainfall (89 mm).
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February
February is cool with highs of 17°C and lows of 7°C. The wettest month with 92 mm of rain.
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March
March is cool with highs of 16°C and lows of 6°C. Regular rainfall (89 mm).
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April
April is the coolest month with highs of 16°C and lows of 6°C. Moderate rainfall (34 mm).
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May
May is cool with highs of 18°C and lows of 7°C. Almost no rain.
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June
June is cool with highs of 18°C and lows of 8°C. Almost no rain.
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July
July is cool with highs of 21°C and lows of 10°C. The driest month with just 1 mm.
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August
August is cool with highs of 22°C and lows of 10°C. Almost no rain.
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September
September is cool with highs of 23°C and lows of 11°C. Almost no rain.
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October
October is cool with highs of 23°C and lows of 11°C. Light rainfall.
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November
November is cool with highs of 21°C and lows of 9°C. Moderate rainfall (59 mm).
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December
December is cool with highs of 17°C and lows of 7°C. Moderate rainfall (70 mm).
