Current Conditions

São Sebastião, São Paulo

65°F18°C

Clear

Wind

NE 6 mph9 km/h

Humidity

84%

Cloud Cover

27%

As of Wednesday, September 2, 2026 at 11:09 PM GMT-3

Today's Outlook

Night

Mostly clear, with a low around 64°F18°C. Breezy from the ENE at 7 to 9 mph11 to 15 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 72°F22°C	Low 64°F18°C	Precip 0 in0 mm—	Cloud 10%	Wind ENE 8 mph14 km/h	Thursday: Mostly clear and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the ENE at 10 to 12 mph16 to 19 km/h. Thursday Night: Mostly clear, with a low around 64°F18°C. Breezy from the ENE at 7 to 9 mph11 to 15 km/h.
Showers	High 78°F25°C	Low 68°F20°C	Precip 0.03 in0.7 mm53%	Cloud 23%	Wind WSW 7 mph11 km/h	Friday: Mostly clear and warm, with a high of 78°F25°C and morning low of 68°F20°C. Breezy from the WSW at 7 to 10 mph11 to 16 km/h. Friday Night: Partly cloudy, with a low around 68°F20°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. 53% chance of showers in the evening.
Rain	High 68°F20°C	Low 67°F19°C	Precip 0.45 in11.5 mm98%	Cloud 91%	Wind ESE 6 mph10 km/h	Saturday: Overcast and warm, with a high of 68°F20°C. Breezy from the ESE at 7 to 8 mph11 to 12 km/h. 88% chance of light rain throughout the day. Humid. Saturday Night: Overcast, with a low around 67°F19°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. 98% chance of rain throughout the night.
Rain	High 67°F19°C	Low 60°F16°C	Precip 1.08 in27.4 mm100%	Cloud 100%	Wind S 11 mph17 km/h	Sunday: Overcast and mild, with a high of 64°F18°C. Breezy from the S at 11 mph17 km/h. 100% chance of rain throughout the day. Sunday Night: Overcast, with a low around 60°F16°C. Breezy from the S at 10 to 12 mph17 to 20 km/h. 100% chance of rain throughout the night.
Rain	High 62°F17°C	Low 60°F15°C	Precip 0.39 in9.9 mm99%	Cloud 98%	Wind SE 8 mph12 km/h	Monday: Overcast and mild, with a high of 62°F17°C. Breezy from the SE at 7 to 8 mph11 to 12 km/h. 84% chance of light rain throughout the day. Monday Night: Overcast, with a low around 60°F16°C. Breezy from the SE at 9 to 10 mph14 to 15 km/h. 99% chance of rain throughout the night.
Light Rain	High 67°F20°C	Low 62°F17°C	Precip 0.25 in6.3 mm93%	Cloud 86%	Wind ENE 10 mph16 km/h	Tuesday: Overcast and mild, with a high of 67°F20°C and morning low of 63°F17°C. Breezy from the E at 10 to 11 mph16 to 18 km/h. 86% chance of light rain throughout the day. Tuesday Night: Overcast, with a low around 62°F17°C. Breezy from the ENE at 10 mph16 km/h. 93% chance of light rain throughout the night.
Light Rain	High 69°F21°C	Low 66°F19°C	Precip 0.31 in7.9 mm60%	Cloud 80%	Wind ENE 7 mph11 km/h	Wednesday: Overcast and warm, with a high of 69°F21°C. Breezy from the E at 6 to 8 mph10 to 12 km/h. 60% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 66°F19°C. Breezy from the ENE at 7 to 8 mph11 to 14 km/h. 59% chance of light rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdaySep 3	72°F22°C	64°F18°C	0 in0 mm· —	10%	Clear	ENE 8 mph14 km/h
DayMostly clear and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the ENE at 10 to 12 mph16 to 19 km/h. NightMostly clear, with a low around 64°F18°C. Breezy from the ENE at 7 to 9 mph11 to 15 km/h.
	FridaySep 4	78°F25°C	68°F20°C	0.03 in0.7 mm· 53%	23%	Showers	WSW 7 mph11 km/h
DayMostly clear and warm, with a high of 78°F25°C and morning low of 68°F20°C. Breezy from the WSW at 7 to 10 mph11 to 16 km/h. NightPartly cloudy, with a low around 68°F20°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. 53% chance of showers in the evening.
	SaturdaySep 5	68°F20°C	67°F19°C	0.45 in11.5 mm· 98%	91%	Rain	ESE 6 mph10 km/h
DayOvercast and warm, with a high of 68°F20°C. Breezy from the ESE at 7 to 8 mph11 to 12 km/h. 88% chance of light rain throughout the day. Humid. NightOvercast, with a low around 67°F19°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. 98% chance of rain throughout the night.
	SundaySep 6	67°F19°C	60°F16°C	1.08 in27.4 mm· 100%	100%	Rain	S 11 mph17 km/h
DayOvercast and mild, with a high of 64°F18°C. Breezy from the S at 11 mph17 km/h. 100% chance of rain throughout the day. NightOvercast, with a low around 60°F16°C. Breezy from the S at 10 to 12 mph17 to 20 km/h. 100% chance of rain throughout the night.
	MondaySep 7	62°F17°C	60°F15°C	0.39 in9.9 mm· 99%	98%	Rain	SE 8 mph12 km/h
DayOvercast and mild, with a high of 62°F17°C. Breezy from the SE at 7 to 8 mph11 to 12 km/h. 84% chance of light rain throughout the day. NightOvercast, with a low around 60°F16°C. Breezy from the SE at 9 to 10 mph14 to 15 km/h. 99% chance of rain throughout the night.
	TuesdaySep 8	67°F20°C	62°F17°C	0.25 in6.3 mm· 93%	86%	Light Rain	ENE 10 mph16 km/h
DayOvercast and mild, with a high of 67°F20°C and morning low of 63°F17°C. Breezy from the E at 10 to 11 mph16 to 18 km/h. 86% chance of light rain throughout the day. NightOvercast, with a low around 62°F17°C. Breezy from the ENE at 10 mph16 km/h. 93% chance of light rain throughout the night.
	WednesdaySep 9	69°F21°C	66°F19°C	0.31 in7.9 mm· 60%	80%	Light Rain	ENE 7 mph11 km/h
DayOvercast and warm, with a high of 69°F21°C. Breezy from the E at 6 to 8 mph10 to 12 km/h. 60% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 66°F19°C. Breezy from the ENE at 7 to 8 mph11 to 14 km/h. 59% chance of light rain throughout the night.
	ThursdaySep 10	72°F22°C	68°F20°C	0.47 in12 mm· 70%	93%	Rain	NE 7 mph11 km/h
DayOvercast and warm, with a high of 72°F22°C. Breezy from the NE at 7 mph11 km/h. 59% chance of light rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the NNE at 7 to 8 mph11 to 13 km/h. 70% chance of rain throughout the night.
	FridaySep 11	72°F22°C	68°F20°C	0.3 in7.7 mm· 44%	86%	Light Rain	NW 8 mph13 km/h
DayOvercast and warm, with a high of 72°F22°C. Breezy from the SW at 8 mph13 km/h. 44% chance of light rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the N at 8 mph12 km/h. 44% chance of light rain throughout the night.
	SaturdaySep 12	70°F21°C	67°F20°C	0.27 in6.9 mm· 46%	82%	Light Rain	E 8 mph13 km/h
DayOvercast and warm, with a high of 70°F21°C. Breezy from the ESE at 9 mph14 km/h. 38% chance of light rain throughout the day. NightOvercast, with a low around 67°F20°C. Breezy from the E at 8 to 9 mph13 to 14 km/h. 46% chance of light rain throughout the night.
	SundaySep 13	69°F21°C	67°F19°C	0.33 in8.4 mm· 50%	79%	Light Rain	ESE 9 mph15 km/h
DayMostly cloudy and warm, with a high of 69°F21°C. Breezy from the ESE at 9 to 10 mph15 to 16 km/h. 49% chance of light rain throughout the day. NightOvercast, with a low around 67°F19°C. Breezy from the E at 9 mph14 km/h. 50% chance of light rain throughout the night.
	MondaySep 14	70°F21°C	66°F19°C	0.23 in5.9 mm· 45%	72%	Light Rain	E 9 mph14 km/h
DayMostly cloudy and warm, with a high of 70°F21°C. Breezy from the E at 9 mph14 km/h. 43% chance of light rain throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the E at 8 mph13 km/h. 45% chance of light rain throughout the night.
	TuesdaySep 15	71°F22°C	67°F19°C	0.24 in6.2 mm· 35%	69%	Showers	E 8 mph13 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 67°F19°C. Breezy from the ESE at 8 to 9 mph13 to 15 km/h. 35% chance of showers throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the ENE at 8 mph12 km/h. 35% chance of light rain throughout the night.
	WednesdaySep 16	71°F22°C	67°F19°C	0.23 in5.9 mm· 36%	66%	Showers	E 7 mph12 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 67°F19°C. Breezy from the ESE at 8 to 9 mph12 to 14 km/h. 35% chance of showers throughout the day. NightMostly cloudy, with a low around 67°F20°C. Breezy from the E at 7 to 8 mph12 to 13 km/h. 36% chance of showers throughout the night.
	ThursdaySep 17	71°F22°C	67°F20°C	0.26 in6.7 mm· 47%	72%	Light Rain	E 7 mph12 km/h
DayMostly cloudy and warm, with a high of 71°F22°C. Breezy from the ESE at 8 mph12 km/h. 42% chance of light rain throughout the day. NightMostly cloudy, with a low around 67°F20°C. Breezy from the E at 7 to 8 mph12 to 12 km/h. 47% chance of light rain throughout the night.

Nearby Cities

Ilhabela3 mi6 km Caraguatatuba10 mi16 km Paraibuna30 mi49 km Ubatuba31 mi50 km Salesópolis32 mi52 km Biritiba Mirim42 mi67 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 23.7600°S, 45.4097°W·Elevation: 6m·Timezone: America/Sao_Paulo·Population: 81,595