rising tide; incoming tide; flood tide
Refers to the literal rising of the sea level as the tide comes in.
I went fishing to match the time of the rising tide.
surge; upswing
Figurative use for a rise in popularity, power, momentum, or economic trends.
The new product's popularity is riding a surge.
Standard kanji spelling; high news frequency.
Alternate kanji form; less common than 上げ潮.
Compound of 上げ (age, 'raising') + 潮 (shio, 'tide').