Port Jefferson Station, New York Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
Port Jefferson Station weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——80°55°—
- ThursdayJun 4Overcast——83°54°+3°
- FridayJun 5Overcast——82°56°-1°
- SaturdayJun 6Overcast21%—86°70°+4°
- SundayJun 7Light Drizzle58%0.02″79°58°-7°
- MondayJun 8Overcast44%—72°55°-7°
- TuesdayJun 9Overcast16%—75°58°+3°
PM2.5 at 20.7 µg/m³ (AQI 73) with a 0.90 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 50 now. With UV 7.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 50 by mid-afternoon.
- Present
- AQI 50
- UV peak
- 7.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 50
PM × Wind × Precip
PM2.5 at 20.7 µg/m³ (AQI 73) with a 0.90 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
The higher the clouds, the finer the weather.
- Moonrise
- 2:46 AM
- Moonset
- 11:44 AM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Port Jefferson Station at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 22 (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 3, 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.
Beaches near Port Jefferson Station
- Robert Moses Beach23.4 mi
Each linked page shows live water temperature, wave height, swim and surf verdicts, tides, and rip-current risk from NDBC + NOAA + NWS data.