Syosset, New York Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Syosset weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——86°57°—
- FridayJun 5Overcast——92°61°+6°
- SaturdayJun 6Light Showers43%—90°67°-2°
- SundayJun 7Showers43%0.17″83°66°-7°
- MondayJun 8Overcast——76°60°-7°
- TuesdayJun 9Overcast——82°62°+6°
- WednesdayJun 10Mostly Clear——86°65°+4°
Ozone at AQI 110 — peak already passed at 1 PM under clear skies. AQI up 36 in the last 6 hours — air quality is degrading. Levels should ease through evening.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 110 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 110
- UV peak
- 0.7 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 110
PM × Wind × Precip
PM2.5 at 15.7 µg/m³, PM10 at 18.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:24 AM
- Moonset
- 12:51 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Syosset at a glance
- Today vs. normal: 75°F — typical for the season
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Syosset
SPC has placed Syosset in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Beaches near Syosset
- Jones Beach Beach15.3 mi
- Long Beach NY Beach17.7 mi
- Robert Moses Beach18.2 mi
Each linked page shows live water temperature, wave height, swim and surf verdicts, tides, and rip-current risk from NDBC + NOAA + NWS data.