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High Surf Expected  Tuesday Night, Dec. 15, 2020 and Wednesday Morning , Dec. 16, 2020

National Weather Service - Seattle, WAnational-weather-service-logo
Issued: Tue, Dec 15, 2020 - 02:46 AM
Next Update: 16 Dec 2020
Point of Contact: NWS Operations (24/7/365) 206-526-6095

Key Points
Large waves between 18 and 22 feet will affect the Washington Coast tonight and Wednesday morning.
Changes from Previous Briefing
A second round of large waves around 20 feet are possible on Thursday.
Weather and Impact Outlook
Screenshot 2020-12-15 101350
Confidence and Details
Washington Coast
High Confidence
  • Large waves will cause beach erosion and carry debris (e.g. tree logs) onshore.
Forecast Details
  • Tonight and Wednesday Morning:
    • Waves 18 to 22 feet at 16 to 18 seconds.
  • Wednesday Afternoon and evening::
    • Seas will gradually subside to 12 to 14 feet at 12 to 14 seconds.
  • Thursday:
    • A second batch of large waves 18 to 21 feet at 13 or 14 seconds could arrive in the morning.

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