Current Conditions

São Sebastião, São Paulo

66°F19°C

Rain

Wind

E 6 mph10 km/h

Humidity

88%

Cloud Cover

74%

As of Tuesday, September 8, 2026 at 4:40 PM GMT-3

Today's Outlook

Day

Overcast and warm, with a high of 69°F20°C. Light wind from the SE around 3 mph5 km/h. 79% chance of light rain throughout the day. Humid.

Night

Overcast, with a low around 66°F19°C. Light wind from the ENE around 4 mph6 km/h. 89% chance of rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 69°F20°C	Low 66°F19°C	Precip 0.43 in11 mm89%	Cloud 87%	Wind E 3 mph5 km/h	Wednesday: Overcast and warm, with a high of 69°F20°C. Light wind from the SE around 3 mph5 km/h. 79% chance of light rain throughout the day. Humid. Wednesday Night: Overcast, with a low around 66°F19°C. Light wind from the ENE around 4 mph6 km/h. 89% chance of rain throughout the night.
Rain	High 70°F21°C	Low 68°F20°C	Precip 0.78 in19.8 mm97%	Cloud 96%	Wind NNE 6 mph9 km/h	Thursday: Overcast and warm, with a high of 70°F21°C. Light wind from the NE around 5 mph8 km/h. 90% chance of rain throughout the day. Humid. Thursday Night: Overcast, with a low around 68°F20°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h. 97% chance of rain throughout the night.
Light Rain	High 75°F24°C	Low 70°F21°C	Precip 0.18 in4.5 mm65%	Cloud 75%	Wind NE 7 mph11 km/h	Friday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 70°F21°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h. 40% chance of showers throughout the day. Humid. Friday Night: Overcast, with a low around 70°F21°C. Breezy from the NE at 7 mph11 km/h. 65% chance of light rain throughout the night.
Rain	High 74°F23°C	Low 67°F20°C	Precip 0.54 in13.7 mm89%	Cloud 90%	Wind W 8 mph13 km/h	Saturday: Overcast and warm, with a high of 74°F23°C. Breezy from the NW at 8 to 10 mph13 to 16 km/h. 76% chance of rain throughout the day. Humid. Saturday Night: Overcast, with a low around 67°F20°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. 89% chance of rain throughout the night.
Rain	High 67°F19°C	Low 64°F18°C	Precip 0.8 in20.2 mm99%	Cloud 99%	Wind SSE 9 mph14 km/h	Sunday: Overcast and mild, with a high of 65°F19°C. Breezy from the SSE at 9 mph14 km/h. 99% chance of rain throughout the day. Sunday Night: Overcast, with a low around 64°F18°C. Breezy from the SSE at 9 mph14 km/h. 99% chance of rain throughout the night.
Rain	High 65°F18°C	Low 64°F18°C	Precip 1.04 in26.3 mm99%	Cloud 98%	Wind E 10 mph15 km/h	Monday: Overcast and mild, with a high of 65°F18°C. Breezy from the E at 10 mph16 km/h. 99% chance of rain throughout the day. Monday Night: Overcast, with a low around 64°F18°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 99% chance of rain throughout the night.
Rain	High 67°F19°C	Low 65°F18°C	Precip 0.5 in12.7 mm92%	Cloud 82%	Wind SSW 8 mph13 km/h	Tuesday: Overcast and mild, with a high of 67°F19°C. Breezy from the SSW at 9 to 11 mph14 to 17 km/h. 69% chance of light rain throughout the day. Tuesday Night: Overcast, with a low around 65°F18°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 92% chance of rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	69°F20°C	66°F19°C	0.43 in11 mm· 89%	87%	Rain	E 3 mph5 km/h
DayOvercast and warm, with a high of 69°F20°C. Light wind from the SE around 3 mph5 km/h. 79% chance of light rain throughout the day. Humid. NightOvercast, with a low around 66°F19°C. Light wind from the ENE around 4 mph6 km/h. 89% chance of rain throughout the night.
	ThursdaySep 10	70°F21°C	68°F20°C	0.78 in19.8 mm· 97%	96%	Rain	NNE 6 mph9 km/h
DayOvercast and warm, with a high of 70°F21°C. Light wind from the NE around 5 mph8 km/h. 90% chance of rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h. 97% chance of rain throughout the night.
	FridaySep 11	75°F24°C	70°F21°C	0.18 in4.5 mm· 65%	75%	Light Rain	NE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 70°F21°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h. 40% chance of showers throughout the day. Humid. NightOvercast, with a low around 70°F21°C. Breezy from the NE at 7 mph11 km/h. 65% chance of light rain throughout the night.
	SaturdaySep 12	74°F23°C	67°F20°C	0.54 in13.7 mm· 89%	90%	Rain	W 8 mph13 km/h
DayOvercast and warm, with a high of 74°F23°C. Breezy from the NW at 8 to 10 mph13 to 16 km/h. 76% chance of rain throughout the day. Humid. NightOvercast, with a low around 67°F20°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. 89% chance of rain throughout the night.
	SundaySep 13	67°F19°C	64°F18°C	0.8 in20.2 mm· 99%	99%	Rain	SSE 9 mph14 km/h
DayOvercast and mild, with a high of 65°F19°C. Breezy from the SSE at 9 mph14 km/h. 99% chance of rain throughout the day. NightOvercast, with a low around 64°F18°C. Breezy from the SSE at 9 mph14 km/h. 99% chance of rain throughout the night.
	MondaySep 14	65°F18°C	64°F18°C	1.04 in26.3 mm· 99%	98%	Rain	E 10 mph15 km/h
DayOvercast and mild, with a high of 65°F18°C. Breezy from the E at 10 mph16 km/h. 99% chance of rain throughout the day. NightOvercast, with a low around 64°F18°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 99% chance of rain throughout the night.
	TuesdaySep 15	67°F19°C	65°F18°C	0.5 in12.7 mm· 92%	82%	Rain	SSW 8 mph13 km/h
DayOvercast and mild, with a high of 67°F19°C. Breezy from the SSW at 9 to 11 mph14 to 17 km/h. 69% chance of light rain throughout the day. NightOvercast, with a low around 65°F18°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 92% chance of rain throughout the night.
	WednesdaySep 16	66°F19°C	64°F18°C	0.33 in8.4 mm· 70%	79%	Light Rain	SSE 8 mph13 km/h
DayMostly cloudy and mild, with a high of 66°F19°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. 70% chance of light rain throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SSE at 8 mph12 km/h. 63% chance of light rain throughout the night.
	ThursdaySep 17	67°F19°C	64°F18°C	0.19 in4.8 mm· 59%	77%	Light Rain	E 10 mph17 km/h
DayMostly cloudy and mild, with a high of 67°F19°C. Breezy from the E at 11 to 12 mph17 to 19 km/h. 51% chance of light rain throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the E at 10 to 11 mph16 to 18 km/h. 59% chance of light rain throughout the night.
	FridaySep 18	70°F21°C	66°F19°C	0.07 in1.8 mm· 23%	69%	Drizzle	E 9 mph15 km/h
DayMostly cloudy and warm, with a high of 70°F21°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the ENE at 9 to 10 mph14 to 17 km/h. 23% chance of drizzle throughout the night.
	SaturdaySep 19	71°F22°C	67°F19°C	0.14 in3.6 mm· 38%	77%	Light Rain	E 8 mph12 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 67°F19°C. Breezy from the E at 8 to 9 mph13 to 15 km/h. 29% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 67°F19°C. Breezy from the ENE at 7 to 8 mph12 to 13 km/h. 38% chance of light rain throughout the night.
	SundaySep 20	72°F22°C	68°F20°C	0.2 in5.2 mm· 43%	85%	Light Rain	ENE 7 mph11 km/h
DayOvercast and warm, with a high of 72°F22°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. 37% chance of light rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the NE at 7 mph11 km/h. 43% chance of light rain throughout the night.
	MondaySep 21	72°F22°C	68°F20°C	0.25 in6.3 mm· 38%	86%	Light Rain	ENE 7 mph12 km/h
DayOvercast and warm, with a high of 72°F22°C. Breezy from the E at 8 mph12 km/h. 38% chance of light rain throughout the day. Humid. NightOvercast, with a low around 69°F20°C. Breezy from the NE at 7 mph11 km/h. 36% chance of light rain throughout the night.
	TuesdaySep 22	73°F23°C	68°F20°C	0.2 in5.1 mm· 37%	81%	Light Rain	ENE 7 mph11 km/h
DayOvercast and warm, with a high of 73°F23°C and morning low of 68°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h. 35% chance of light rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Breezy from the NE at 7 mph11 km/h. 37% chance of light rain throughout the night.
	WednesdaySep 23	73°F23°C	68°F20°C	0.12 in3.1 mm· 31%	71%	Light Rain	ENE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 68°F20°C. Breezy from the E at 7 to 8 mph12 to 13 km/h. 30% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Light wind from the NE around 6 mph10 km/h. 31% 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