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The Best Episodes of H2O: Mermaid Adventures Season 1

Every episode of H2O: Mermaid Adventures Season 1 ranked from best to worst. Discover the Best Episodes of H2O: Mermaid Adventures Season 1!

Binge this in 4h 48m•Peaking at 8.3/10

The lives of teenagers Emma, Cleo and Rikki are forever changed when a magical, forbidden island gives them the power to turn into mermaids.

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Episode Rankings

  1. #1 Fan Favorite
    H2O: Mermaid Adventures Season 1 Episode 1 - The Secret of Mako Island
    7.5/10(24 votes)

    #1 - The Secret of Mako Island

    S1:E1

    Cleo, Emma and Rikki get stranded on Mako island and fall into a magic pool where their lives change forever.

    Director:Unknown
    Writer:Unknown

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  2. H2O: Mermaid Adventures Season 1 Episode 2 - Caught in the Net
    7.3/10(19 votes)

    #2 - Caught in the Net

    S1:E2

    Emma competes in a contest, Cleo is stuck babysitting an intern and save an injured sea turtle.

    Director:Unknown
    Writer:Unknown

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  3. H2O: Mermaid Adventures Season 1 Episode 3 - The White Mermaid
    6.6/10(17 votes)

    #3 - The White Mermaid

    S1:E3

    The girls discover of an ancient mermaid statue and return it but treasure hunters have another idea.

    Director:Unknown
    Writer:Unknown

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  4. H2O: Mermaid Adventures Season 1 Episode 4 - A Stormy Party
    7.6/10(17 votes)

    #4 - A Stormy Party

    S1:E4

    A storm threatens to wash out a birthday party.

    Director:Unknown
    Writer:Unknown

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  5. H2O: Mermaid Adventures Season 1 Episode 5 - Mako Island Hotel
    7.6/10(17 votes)

    #5 - Mako Island Hotel

    S1:E5

    Zane's father plans a luxury resort on Mako Island.

    Director:Unknown
    Writer:Unknown

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  6. H2O: Mermaid Adventures Season 1 Episode 6 - The Mysterious Seaweed
    8.3/10(17 votes)

    #6 - The Mysterious Seaweed

    S1:E6

    Aggressive blue seaweed attacks Emma.

    Director:Unknown
    Writer:Unknown

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  7. H2O: Mermaid Adventures Season 1 Episode 7 - It's in the Bag!
    7.4/10(18 votes)

    #7 - It's in the Bag!

    S1:E7

    Discarded plastic bags pose a threat to Teddy and his friends.

    Director:Unknown
    Writer:Unknown

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  8. H2O: Mermaid Adventures Season 1 Episode 8 - Dolphin City Triangle
    6.8/10(17 votes)

    #8 - Dolphin City Triangle

    S1:E8

    Atmospheric disturbances result in disastrous consequences.

    Director:Unknown
    Writer:Unknown

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  9. H2O: Mermaid Adventures Season 1 Episode 9 - Poseidon's Daughter
    8.0/10(17 votes)

    #9 - Poseidon's Daughter

    S1:E9

    Dolphin City is the location for a new movie.

    Director:Unknown
    Writer:Unknown

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  10. H2O: Mermaid Adventures Season 1 Episode 10 - Dolphin City Mascot
    7.9/10(18 votes)

    #10 - Dolphin City Mascot

    S1:E10

    Danny gets captured by the Oceanic Center for observation.

    Director:Unknown
    Writer:Unknown

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  11. H2O: Mermaid Adventures Season 1 Episode 11 - Bad Waves
    7.8/10(17 votes)

    #11 - Bad Waves

    S1:E11

    Lewis and the girls must find what's behind mysterious sound waves that are creating havoc.

    Director:Unknown
    Writer:Unknown

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  12. H2O: Mermaid Adventures Season 1 Episode 12 - Jaw-ache!
    7.2/10(17 votes)

    #12 - Jaw-ache!

    S1:E12

    Berk breaks a tooth and wanders near the beach in pain, causing a panic.

    Director:Unknown
    Writer:Unknown

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  13. H2O: Mermaid Adventures Season 1 Episode 13 - The Lost Ring
    8.3/10(19 votes)

    #13 - The Lost Ring

    S1:E13

    Rikki takes matters into her own hands by spying on her dad and his new girlfriend.

    Director:Unknown
    Writer:Unknown

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Season 1 Ratings Summary

"The Secret of Mako Island" is the best rated episode of "H2O: Mermaid Adventures" season 1. It scored 7.5/10 based on 24 votes. Directed by Unknown and written by Unknown, it aired on 6/1/2015. This episode is rated 0.2 points higher than the second-best, "Caught in the Net".