Weak toFlyingRockFirePsychic ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	82.7
Mewtwo	Psychic	ConfusionPsystrikeLegacy	71.2
Reshiram	DragonFire	Fire FangFusion FlareLegacy	68.6
Salamence	DragonFlying	Fire FangFly	63.3
Chandelure	GhostFire	Fire SpinOverheat	62.9
Moltres	FireFlying	Fire SpinFly	62.3
Cinderace	Fire	Fire SpinPyroball	62.0
Volcarona	BugFire	Fire SpinOverheat	61.3
Darmanitan	Fire	Fire FangOverheat	61.1
Yveltal	DarkFlying	GustOblivion WingLegacy	60.9
Alakazam	Psychic	ConfusionPsychicLegacy	60.8
Toucannon	NormalFlying	PeckBeak BlastLegacy	60.3

Clear boosts the Fire attacks above. Overcast and Rainy boost Spinarak.

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

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

Questions people ask

What is Spinarak weak to in Pokémon GO?

Spinarak takes 1.6 times from Flying, Rock, Fire and Psychic.

What's the best counter to Spinarak?

Blacephalon with Incinerate and Mind Blown, worth 82.7 damage per second against Spinarak's own defense. The full ranking is above.