noun
spring tide
Refers to the tide with the greatest difference between high and low water, occurring around new and full moons. Often contrasted with 小潮 (こしお, neap tide).
See also: 小潮
大潮の日は潮の満ち引きが激しい。
On spring tide days, the ebb and flow of the tide is strong.
大潮のときは干潮と満潮の差が最大になる
During spring tides, the difference between low and high tide is greatest.