Weak toGrassElectric ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	42.6
Zeraora	Electric	Volt SwitchPlasma Fists	36.5
Kartana	GrassSteel	Razor LeafLeaf Blade	36.5
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	35.7
Xurkitree	Electric	Thunder ShockDischarge	35.3
Roserade	GrassPoison	Magical LeafLeaf Storm	31.1
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	30.9
Deoxys	Psychic	Charge BeamThunderbolt	30.8
Electivire	Electric	Thunder ShockWild Charge	30.6
Zarude	DarkGrass	Vine WhipPower Whip	30.5
Rillaboom	Grass	Razor LeafFrenzy PlantLegacy	30.1
Raikou	Electric	Volt SwitchWild Charge	29.7

Rainy boosts the Electric attacks above. Rainy boosts Seaking.

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

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

Questions people ask

What is Seaking weak to in Pokémon GO?

Seaking takes 1.6 times from Grass and Electric.

What's the best counter to Seaking?

Regieleki with Lock On and Thunder Cage, worth 42.6 damage per second against Seaking's own defense. The full ranking is above.