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Climate is mild, with little variation in temperature year round. However, be prepared for high winds, fog, and sea spray at any time. Visitors to the islands should dress in layers, with short and long pants, windbreaker, hat, sun screen, and waterproof outer clothing. Wear sturdy hiking shoes with non-slip soles.
Although most visitation occurs in the summer, migrating gray whales and spectacular wildflower displays attract visitors in the winter and spring. Autumn is an excellent time to travel to the park, as well as for diving, as the days are usually sunny, with minimal winds and clear ocean water.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| High - °F | 65.5 | 66.5 | 66.5 | 68.1 | 68.9 | 71.3 | 74.1 | 75.1 | 75.3 | 74.3 | 70.9 | 66.7 | 70.3 |
| Low - °F | 44.2 | 45.3 | 46.4 | 48.7 | 51.8 | 55.0 | 57.9 | 58.6 | 57.2 | 53.3 | 48.2 | 44.6 | 51.0 |
| Avg Precip (in) | 3.43 | 3.40 | 2.49 | 0.99 | 0.18 | 0.05 | 0.02 | 0.05 | 0.24 | 0.30 | 1.67 | 2.23 | 15.03 |
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This site is in no way associated with the United States Government, the Department of the Interior or the National Park Service
