Weather

For the most current weather forecast, please visit:

• Marine Forecast
• • Channel Islands National Marine Sanctuary Internet Weather Kiosk
• Land Area Forecasts
• • Anacapa and Santa Cruz Islands
  • San Miguel and Santa Rosa Islands
  • Santa Barbara Island

 

Spring | Summer | Fall | Winter

Although the park is located in "sunny" southern California, we actually do have seasons here. While the seasonal changes are nothing like one would find in Minnesota, there are differences that visitors should take into consideration when visiting the park. Each season has its own character and casts a unique mood over the islands.

In addition, visitors also should be aware that ocean and weather conditions vary considerably from day-to-day and island-to-island. Although this makes planning your visit a little difficult, we must remember that this unpredictable and, at times, unforgiving weather is one of the main reasons that the islands have been afforded so much isolation and protection from the rapid changes seen on the mainland. It is, in part, what makes the Channel Islands such a unique and wonderful place.

We encourage you to take the opportunity to fully enjoy the islands throughout the entire year. Channel Islands National Park is truly a place for all seasons.

In general, the islands have a Mediterranean climate year-round. Temperatures are relatively stable, with highs averaging in the mid-60s (°F) and lows in the low-50s.

However, visitors to the islands must be prepared for high winds, fog, rough seas, and sea spray at any time. Winds are often calm in the early morning and increase during the afternoon. High winds may occur regardless of the forecast, especially on the outer islands, Santa Rosa and San Miguel (30-knot winds are not unusual). Anacapa, eastern Santa Cruz, and Santa Barbara Islands have more moderate winds. Dense fog is common during the late spring and early summer months, but may occur at any time. Ocean water temperatures range from the lower 50s (°F) in the winter to the upper 60s in the fall.

Due to this weather variation, visitors to the islands should dress in layers, with short and long pants, fleece jacket or sweatshirt, windbreaker, hat, sunscreen, and waterproof outer clothing. In addition, visitors should wear sturdy hiking shoes with non-slip soles.

 

Spring
Although temperatures are becoming warmer, strong winds often occur during this season. Dense fog is common during the late spring. Ocean temperatures range from the mid 50s to low 60s.
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Summer
Temperatures average in the low-70s. Afternoon winds are common. Fog diminishes near midsummer. Calm winds and seas become more frequent near the end of summer and continue through October. Ocean temperatures begin to warm, reaching the high 60s by end of summer. Underwater visibility increases.
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Fall
The best chance for warm weather, calm winds, and seas continues. However, beginning around October, strong east or Santa Ana winds are possible. Ocean temperatures may reach 70° (F) in early fall and visibility may reach 100 feet.
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Winter
Temperatures begin to cool. Winter storms start to appear, with most rain falling between December and March. Nevertheless, beautiful, sunny, clear winter days occur between storms.
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