Weak toGhostWaterGrassIceDark ×1.6

Attacker	Type	Moveset	DPS
Kartana	GrassSteel	Razor LeafLeaf Blade	44.4
Blacephalon	FireGhost	AstonishShadow Ball	44.2
Inteleon	Water	Water GunHydro CannonLegacy	40.0
Chien-Pao	DarkIce	SnarlBlizzard	40.0
Kyogre	Water	WaterfallOrigin PulseLegacy	39.8
Darkrai	Dark	SnarlShadow Ball	39.7
Chandelure	GhostFire	HexShadow Ball	39.4
Gengar	GhostPoison	LickShadow BallLegacy	39.4
Absol	Dark	SnarlBrutal SwingLegacy	38.6
Roserade	GrassPoison	Magical LeafLeaf Storm	37.8
Kingler	Water	BubbleCrabhammer	37.8
Greninja	WaterDark	Water ShurikenHydro CannonLegacy	37.7

Rainy boosts the Water attacks above. Clear and Fog boost Sandygast.

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

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

Questions people ask

What is Sandygast weak to in Pokémon GO?

Sandygast takes 1.6 times from Ghost, Water, Grass, Ice and Dark.

What's the best counter to Sandygast?

Kartana with Razor Leaf and Leaf Blade, worth 44.4 damage per second against Sandygast's own defense. The full ranking is above.