Maryland Nuisance Tidal Tidal Flooding - MyCoast Maryland Nuisance Tidal Tidal Flooding - MyCoast

Maryland Nuisance Tidal Flooding

Help us capture tidal Nuisance Flood events and impacts along our Rivers, the Chesapeake Bay and in the Ocean and Coastal Bays

The Maryland Department of Natural Resource’s, Chesapeake & Coastal Service is leading an initiative in collaboration with local partners to document the effect and impact of extreme high tides or “sunny day flooding” on our state’s coastline; waterways, private property and public infrastructure.

We NEED Your Help. Please help us capture and document tidal nuisance flood events!

2022 Annapolis Nuisance Flooding Events to Date (2.0′)





Tide statistics via NOAA’s excellent Tides and Currents website.

When Will Tides be Higher Than Normal?

According to NOAA’s high tide bulletin, the region will see higher tides on:

  • March 28 – April 1
  • Apr 26 – April 30
  • May 24 – May 29 (The predicted tides at several locations will be some of the highest of the year)

Why Will Tides be Higher Than Normal?

  • A perigean spring tide will be occurring in December.  This is when the moon is either new or full and closest to earth.  Higher than normal high tides and lower than normal low tides will occur.
  • The increased angle of the sun relative to the Earth, which reaches a maximum during the Winter Solstice (December 21).

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