- For the Chinese version of the level, see Big Wave Beach - Day 4 (Chinese version).
- For the Chinese version of this level before the v1.8 update, see Big Wave Beach - Day 4 (Chinese version: pre-1.8).
Big Wave Beach - Day 4 is the fourth level of Big Wave Beach in Plants vs. Zombies 2. A new zombie called Imp Mermaid Zombie and a new ambush called "Low Tide!" is introduced in this level. When this level is finished for the first time, the player gets a Mystery Gift Box.
The tideline in this level is located between the third and fourth column.
- In this level, a new ambush called "Low Tide!" is introduced, which brings Mermaid Imps onto the lawn. In later levels, other zombies also appear in this ambush.
- The small number next to the zombie icon means that zombie will always appear in that lane, with 1 being the topmost lane and 5 being the bottommost one.
|Waves||Non-dynamic zombies||Ambush zombies||Note(s)|
|1||None||Water reaches 4th column|
|2||None||Water reaches 5th column|
|3||3 2||None||400%/7 Plant Food, water reaches 6th column|
|5||1 3 5||None||First flag; 600%/7 Plant Food|
|6||Low Tide!; water reaches 3rd column|
|7||4 3 2||None|
|8||5 1||None||Water reaches 4th column|
|9||3||None||Water reaches 5th column|
|10||3 3 3||None||Second flag; 100% Plant Food; water reaches 6th column|
|11||1 5 3 2 4||None|
|12||Low Tide!; water reaches 3rd column|
|13||2 5 3 2||None||500%/7 Plant Food; water reaches 4th column|
|14||2 3 5 1 5 5 1||None||Water reaches 5th column|
|15||4 5 1 5 1 3 5 1 2 4 1 3 4 4||None||Final flag, water reaches 6th column|
When the game first starts, try to plant a whole column of Sunflowers at the very back. For the second column, plant Pea Pods right next to the Sunflower column. Keep adding to the Pea Pods when you get enough sun. Never plant them on the tide column. Eventually, when you have enough Pea Pod additions that the zombies are kept at bay, spend some sun on Twin Sunflowers for more Pea Pods. After completing your first row of Pea Pods you can start a second.