CaffeineShark

The best watermelon energy drinks

These are the 7 energy drinks we've rated with watermelon in the flavor name, best first by Shark Score. 6 are sugar-free, and caffeine runs from 114 to 300 mg per can.

By the Sharks · Updated October 2026 · How we score

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#DrinkCaffeineScore
1 PRIME Energy Drink Strawberry WatermelonPRIME 200 mg 90 In stores
2 Reign Inferno Watermelon WarlordReign 300 mg 87 In stores
3 C4 Watermelon BurstC4 200 mg 83 Price
4 C4 Strawberry Watermelon IceC4 200 mg 82 Price
5 CELSIUS Sparkling WatermelonCelsius 200 mg 82 Price
6 Red Bull Red Edition WatermelonRed Bull 114 mg 70 Price
7 Monster Ultra WatermelonMonster 150 mg 65 Price

Drinks are matched by the flavor named on the can, not by our tasting notes.

Only drinks you can buy now are listed. Retired cans keep their scores in the full rankings.

  1. PRIME

    Energy Drink Strawberry Watermelon

    90
    • 200 mg caffeine
    • 12 oz can
    • 16.7 mg/oz
    • Zero sugar
    • Elite
    “The strawberry watermelon combination tastes like summer in a can.”Jared
    Read the review Shop similar
  2. Reign

    Inferno Watermelon Warlord

    87
    • Hard to find
    • 300 mg caffeine
    • 16 oz can
    • 18.8 mg/oz
    • Zero sugar
    • Excellent
    “Incredible kick and appearance with an enjoyable flavor. Directly inferior taste to Adrenaline Shoc Watermelon, but still a very solid all-around energy drink.”Cam
    Read the review Shop similar
  3. C4

    Watermelon Burst

    83
    • 200 mg caffeine
    • 16 oz can
    • 12.5 mg/oz
    • Zero sugar
    • Excellent
    “I like the simple, juicy watermelon flavor that Watermelon Burst has to offer. It’s refreshing and highly re-drinkable.”Jared
    Read the review Check price
  4. C4

    Strawberry Watermelon Ice

    82
    • 200 mg caffeine
    • 16 oz can
    • 12.5 mg/oz
    • Zero sugar
    • Excellent
    “C4 formula and energy blend + a tasty fruit combination = a must try energy drink.”Jared
    Read the review Check price
  5. Celsius

    Sparkling Watermelon

    82
    • 200 mg caffeine
    • 12 oz can
    • 16.7 mg/oz
    • Zero sugar
    • Excellent
    “Tastes like Propel but with caffeine! Great for anyone who’s into seltzers or sparkling waters.”Jared
    Read the review Check price
  6. Red Bull

    Red Edition Watermelon

    70
    • 114 mg caffeine
    • 12 oz can
    • 9.5 mg/oz
    • Enjoyable
    “It is a departure from the original Red Bull both in flavor and appearance, but that isn’t necessarily a bad thing”Matt
    Read the review Check price
  7. Monster

    Ultra Watermelon

    65
    • 150 mg caffeine
    • 16 oz can
    • 9.4 mg/oz
    • Zero sugar
    • Decent
    “Accurate watermelon flavor with the classic “Ultra” sweetness.”Jared
    Read the review Check price

Questions

What is the best watermelon energy drink?

By Shark Score, the best watermelon energy drink we've rated is PRIME Energy Drink Strawberry Watermelon (90), followed by Reign Inferno Watermelon Warlord (87) and C4 Watermelon Burst (83).

What is the best sugar-free watermelon energy drink?

PRIME Energy Drink Strawberry Watermelon (90) is the top-rated zero-sugar watermelon drink on this list. 6 of the 7 are sugar-free.

Which watermelon energy drink has the most caffeine?

Reign Inferno Watermelon Warlord, with 300 mg per 16 fl oz can. See every drink by caffeine in our caffeine chart.

How did you pick these?

Every drink we've rated with watermelon in its flavor name and at least 40 mg of caffeine, ranked by Shark Score. Drinks that are no longer sold are left out. Scores blend the Sharks' reviews with reader ratings; see how we score.