* WHAT. A moderate-rough NW swell will create large breaking waves of 15-20 ft and an increased risk for sneaker waves. * WHERE. San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast and Southern Monterey Bay and Big Sur Coast Counties. * WHEN. From Wednesday morning through Thursday evening. * IMPACTS. Large waves can sweep across beaches without warning.

* WHAT. A moderate period northwest swell will result in a more energetic surf zone. Breaking waves of 8 to 15 feet will be possible. Given the hot weather inland, area beaches will see increased visitation leading to a higher likelihood of people being swept into the ocean. * WHERE. San Francisco, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast and Southern Monterey Bay and Big Sur Coast Counties. * WHEN. From Wednesday morning through Thursday evening. * IMPACTS. Large waves can sweep across beaches without warning.

* WHAT. West winds 10 to 15 kt with gusts up to 30 kt and a moderate chop expected. * WHERE. Monterey Bay. * WHEN. Until 9 PM PDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Northwest winds 20 to 25 kt with gusts up to 35 kt and seas 8 to 11 ft. * WHERE. Waters from Pigeon Point to Point Pinos 10-60 NM. * WHEN. Until 9 PM PDT this evening. * IMPACTS. Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.

* WHAT. West winds 10 to 15 kt and a moderate chop. * WHERE. San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN. Until 9 PM PDT this evening. * IMPACTS. Conditions will be hazardous to small craft.