Weak toGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	40.3
Zeraora	Electric	Volt SwitchPlasma Fists	34.6
Kartana	GrassSteel	Razor LeafLeaf Blade	34.5
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	33.8
Xurkitree	Electric	Thunder ShockDischarge	33.4
Roserade	GrassPoison	Magical LeafLeaf Storm	29.4
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	29.3
Deoxys	Psychic	Charge BeamThunderbolt	29.1
Electivire	Electric	Thunder ShockWild Charge	28.9
Zarude	DarkGrass	Vine WhipPower Whip	28.9
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	28.5
Raikou	Electric	Volt SwitchWild Charge	28.2

Rainy boosts the Electric attacks above. Rainy boosts Seadra.

Level 40, 15 attack IV, costed against Seadra's own defense and typing, one per evolution family.

Seadra's moveset, CP and shiny All counters Raid board

Questions people ask

What is Seadra weak to in Pokémon GO?

Seadra takes 1.6 times from Grass and Electric.

What's the best counter to Seadra?

Regieleki with Lock On and Thunder Cage, worth 40.3 damage per second against Seadra's own defense. The full ranking is above.