• Tue

    Aug 2

    80°Lo 66°

    Sunshine with a stray shower

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Wed

    Aug 3

    85°Lo 68°

    A shower in the afternoon

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
  • Thu

    Aug 4

    85°Lo 71°

    Cloudy and humid

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Fri

    Aug 5

    88°Lo 70°

    A strong afternoon t-storm

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Sat

    Aug 6

    90°Lo 68°

    An afternoon thunderstorm

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
Hi 85° RealFeel® 93° Precipitation 50%

Day

N

E

S

W

  • SW 8 mph
  • Gusts: 13 mph

Sunny to partly cloudy with a shower in places in the afternoon

  • Max UV Index: 7 (High)
  • Thunderstorms: 20%
  • Precipitation: 0.01 in
  • Rain: 0.01 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 68° RealFeel® 68° Precipitation 14%

Night

N

E

S

W

  • SSW 5 mph
  • Gusts: 10 mph

Mainly clear and humid

  • Max UV Index: N/A
  • Thunderstorms: 6%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Aug 3

more Historical Weather Data >
  Today Normal Record 8/3/2015
High 85° 82° 98° (2006) 88°
Low 68° 66° 59° (1985) 69°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:51 AM with 14:14 of sunlight, then sets at 8:05 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:38 AM with 13:53 of moolight, then sets at 8:31 PM

Port Jefferson Weather Report

Torrential downpours in northeastern US to ease heat wave, raise flash flood risk

July 29, 2016; 1:02 AM ET

As July draws to a close, a storm system swinging up from the Deep South will bring downpours to the northeastern U.S. and break the back of an extended heat wave. more >