highwater
/ˈhaɪˌwɔtər/
noun
- The highest level reached by a body of water, such as a river or the sea, especially during a flood or tide.
- Boats were warned to stay clear of the area during highwater.
- The river reached highwater after three days of heavy rain.
- Highwater marks on the bridge showed how deep the flood had been.
adjective
- Relating to or occurring at the time of the highest water level.
- Highwater conditions made the hiking trail impassable.
- They built a highwater barrier to protect the town from future floods.
- The highwater line on the beach was covered with seaweed.