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Current weather in Roslyn Harbor is clear sky.

Where can I find the hourly weather forecast for Roslyn Harbor?

This page shows hourly weather forecast for Roslyn Harbor, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Roslyn Harbor updated regularly?

Weather data for Roslyn Harbor is updated regularly with the latest available observations and forecasts.

Now · 3:38 AM

Roslyn Harbor Weather & Hourly Forecast

United States · New York · 11576

59°F

Clear night

Feels like: 58°F

💧 Humidity 81% 🌡 Pressure 30.09 inHg 💨 Wind 4 mph 👁 Visibility 20.8 mi ☁ Clouds 0% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Roslyn Harbor

Today

4:00 AM

Clear night

59° 💧 None 💨 4 mph H 81%30.09 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 78%30.12 inHg

10:00 AM

Sunny

70° 💧 None 💨 5 mph H 60%30.12 inHg

1:00 PM

Sunny

76° 💧 None 💨 8 mph H 42%30.15 inHg

4:00 PM

Sunny

77° 💧 None 💨 6 mph H 37%30.09 inHg

7:00 PM

Sunny

73° 💧 None 💨 1 mph H 61%30.12 inHg

10:00 PM

Overcast night

67° 💧 None 💨 3 mph H 72%30.18 inHg

Tomorrow

1:00 AM

Clear night

65° 💧 None 💨 3 mph H 81%30.21 inHg

4:00 AM

Partly cloudy night

63° 💧 None 💨 3 mph H 84%30.21 inHg

7:00 AM

Mostly sunny

62° 💧 None 💨 4 mph H 85%30.24 inHg

10:00 AM

Mostly cloudy

72° 💧 None 💨 5 mph H 57%30.24 inHg

1:00 PM

Overcast

77° 💧 None 💨 4 mph H 43%30.21 inHg

4:00 PM

Overcast

79° 💧 None 💨 4 mph H 41%30.18 inHg

7:00 PM

Mostly cloudy

75° 💧 None 💨 2 mph H 55%30.21 inHg

10:00 PM

Overcast night

71° 💧 None 💨 6 mph H 79%30.24 inHg

Wednesday

1:00 AM

Overcast night

70° 💧 None 💨 5 mph H 90%30.24 inHg

Today

4:00 AM

Clear night

59° 💧 None 💨 4 mph H 81%30.09 inHg

5:00 AM

Clear night

59° 💧 None 💨 4 mph H 81%30.09 inHg

6:00 AM

Clear night

58° 💧 None 💨 5 mph H 80%30.09 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 78%30.12 inHg

8:00 AM

Sunny

62° 💧 None 💨 5 mph H 74%30.12 inHg

9:00 AM

Sunny

66° 💧 None 💨 4 mph H 70%30.12 inHg

10:00 AM

Sunny

70° 💧 None 💨 5 mph H 60%30.12 inHg

11:00 AM

Sunny

73° 💧 None 💨 7 mph H 47%30.15 inHg

12:00 PM

Sunny

75° 💧 None 💨 8 mph H 44%30.15 inHg

1:00 PM

Sunny

76° 💧 None 💨 8 mph H 42%30.15 inHg

2:00 PM

Sunny

77° 💧 None 💨 7 mph H 39%30.12 inHg

3:00 PM

Sunny

77° 💧 None 💨 6 mph H 37%30.09 inHg

4:00 PM

Sunny

77° 💧 None 💨 6 mph H 37%30.09 inHg

5:00 PM

Sunny

77° 💧 None 💨 5 mph H 39%30.12 inHg

6:00 PM

Sunny

76° 💧 None 💨 3 mph H 48%30.12 inHg

7:00 PM

Sunny

73° 💧 None 💨 1 mph H 61%30.12 inHg

8:00 PM

Clear night

70° 💧 None 💨 2 mph H 67%30.15 inHg

9:00 PM

Partly cloudy night

68° 💧 None 💨 2 mph H 71%30.18 inHg

10:00 PM

Overcast night

67° 💧 None 💨 3 mph H 72%30.18 inHg

11:00 PM

Overcast night

67° 💧 None 💨 3 mph H 71%30.18 inHg

Tomorrow

12:00 AM

Overcast night

66° 💧 None 💨 2 mph H 75%30.18 inHg

1:00 AM

Clear night

65° 💧 None 💨 3 mph H 81%30.21 inHg

2:00 AM

Clear night

64° 💧 None 💨 3 mph H 83%30.18 inHg

3:00 AM

Partly cloudy night

63° 💧 None 💨 3 mph H 85%30.18 inHg

4:00 AM

Partly cloudy night

63° 💧 None 💨 3 mph H 84%30.21 inHg

5:00 AM

Mostly clear night

62° 💧 None 💨 3 mph H 85%30.21 inHg

6:00 AM

Mostly clear night

61° 💧 None 💨 3 mph H 85%30.21 inHg

7:00 AM

Mostly sunny

62° 💧 None 💨 4 mph H 85%30.24 inHg

8:00 AM

Mostly cloudy

65° 💧 None 💨 4 mph H 78%30.24 inHg

9:00 AM

Overcast

69° 💧 None 💨 4 mph H 67%30.24 inHg

10:00 AM

Mostly cloudy

72° 💧 None 💨 5 mph H 57%30.24 inHg

11:00 AM

Mostly cloudy

74° 💧 None 💨 5 mph H 50%30.24 inHg

12:00 PM

Overcast

76° 💧 None 💨 5 mph H 46%30.24 inHg

1:00 PM

Overcast

77° 💧 None 💨 4 mph H 43%30.21 inHg

2:00 PM

Overcast

78° 💧 None 💨 3 mph H 42%30.21 inHg

3:00 PM

Overcast

79° 💧 None 💨 3 mph H 41%30.21 inHg

4:00 PM

Overcast

79° 💧 None 💨 4 mph H 41%30.18 inHg

5:00 PM

Partly cloudy

79° 💧 None 💨 4 mph H 41%30.21 inHg

6:00 PM

Partly cloudy

78° 💧 None 💨 3 mph H 46%30.21 inHg

7:00 PM

Mostly cloudy

75° 💧 None 💨 2 mph H 55%30.21 inHg

8:00 PM

Overcast night

71° 💧 None 💨 5 mph H 66%30.21 inHg

9:00 PM

Overcast night

70° 💧 None 💨 5 mph H 77%30.24 inHg

10:00 PM

Overcast night

71° 💧 None 💨 6 mph H 79%30.24 inHg

11:00 PM

Overcast night

70° 💧 None 💨 6 mph H 82%30.24 inHg

Wednesday

12:00 AM

Overcast night

70° 💧 None 💨 5 mph H 86%30.24 inHg

1:00 AM

Overcast night

70° 💧 None 💨 5 mph H 90%30.24 inHg

2:00 AM

Overcast night

70° 💧 None 💨 5 mph H 92%30.21 inHg

3:00 AM

Overcast night

70° 💧 None 💨 4 mph H 92%30.21 inHg

4:00 AM

Overcast night

70° 💧 None 💨 4 mph H 90%30.21 inHg

5:00 AM

Overcast night

69° 💧 None 💨 4 mph H 86%30.21 inHg

6:00 AM

Mostly cloudy night

68° 💧 None 💨 4 mph H 82%30.24 inHg

7:00 AM

Mostly sunny

68° 💧 None 💨 4 mph H 81%30.24 inHg

8:00 AM

Mostly sunny

71° 💧 None 💨 5 mph H 78%30.24 inHg

9:00 AM

Sunny

74° 💧 None 💨 5 mph H 72%30.24 inHg

10:00 AM

Mostly sunny

77° 💧 None 💨 5 mph H 66%30.21 inHg

11:00 AM

Mostly sunny

79° 💧 None 💨 5 mph H 59%30.21 inHg

12:00 PM

Mostly sunny

82° 💧 None 💨 6 mph H 52%30.18 inHg

1:00 PM

Partly cloudy

83° 💧 None 💨 8 mph H 50%30.15 inHg

2:00 PM

Partly cloudy

83° 💧 None 💨 9 mph H 50%30.15 inHg

3:00 PM

Mostly cloudy

83° 💧 None 💨 10 mph H 51%30.12 inHg

4:00 PM

Partly cloudy

82° 💧 None 💨 11 mph H 55%30.09 inHg

5:00 PM

Partly cloudy

80° 💧 None 💨 12 mph H 57%30.06 inHg

6:00 PM

Mostly sunny

78° 💧 None 💨 11 mph H 65%30.06 inHg

7:00 PM

Mostly sunny

76° 💧 None 💨 13 mph H 69%30.03 inHg

8:00 PM

Clear night

75° 💧 None 💨 14 mph H 71%30.03 inHg

11:00 PM

Mostly clear night

74° 💧 None 💨 9 mph H 78%30.00 inHg

Thursday

2:00 AM

Clear night

73° 💧 None 💨 9 mph H 72%29.94 inHg

5:00 AM

Mostly clear night

73° 💧 None 💨 10 mph H 76%29.88 inHg

8:00 AM

Sunny

76° 💧 None 💨 7 mph H 71%29.88 inHg

11:00 AM

Mostly sunny

83° 💧 None 💨 7 mph H 53%29.85 inHg

2:00 PM

Mostly cloudy

87° 💧 None 💨 8 mph H 49%29.80 inHg

5:00 PM

Partly cloudy

86° 💧 None 💨 4 mph H 51%29.77 inHg

8:00 PM

Light rain

81° 💧 None 💨 2 mph H 63%29.77 inHg

11:00 PM

Partly cloudy night

77° 💧 None 💨 4 mph H 74%29.80 inHg

Friday

2:00 AM

Mostly clear night

73° 💧 None 💨 6 mph H 80%29.80 inHg

5:00 AM

Overcast night

69° 💧 None 💨 6 mph H 66%29.85 inHg

8:00 AM

Mostly sunny

66° 💧 None 💨 9 mph H 64%29.91 inHg

11:00 AM

Sunny

72° 💧 None 💨 7 mph H 46%29.94 inHg

2:00 PM

Sunny

78° 💧 None 💨 4 mph H 35%29.94 inHg

5:00 PM

Sunny

79° 💧 None 💨 4 mph H 35%29.94 inHg

8:00 PM

Clear night

74° 💧 None 💨 2 mph H 48%29.97 inHg

11:00 PM

Clear night

70° 💧 None 💨 1 mph H 63%30.00 inHg

Saturday

2:00 AM

Clear night

67° 💧 None 💨 1 mph H 75%30.03 inHg

5:00 AM

Clear night

65° 💧 None 💨 1 mph H 87%30.03 inHg

8:00 AM

Sunny

69° 💧 None 💨 1 mph H 80%30.06 inHg

11:00 AM

Partly cloudy

78° 💧 None 💨 5 mph H 47%30.09 inHg

2:00 PM

Partly cloudy

79° 💧 None 💨 7 mph H 50%30.06 inHg

8:00 PM

Overcast night

77° 💧 None 💨 4 mph H 50%30.06 inHg

Sunday

2:00 AM

Overcast night

71° 💧 None 💨 5 mph H 73%30.06 inHg

8:00 AM

Sunny

67° 💧 None 💨 3 mph H 84%30.09 inHg

2:00 PM

Mostly cloudy

68° 💧 None 💨 1 mph H 84%30.12 inHg

8:00 PM

Partly cloudy night

83° 💧 None 💨 5 mph H 48%30.06 inHg

Monday

2:00 AM

Mostly cloudy night

74° 💧 None 💨 7 mph H 77%30.03 inHg

8:00 AM

Mostly sunny

72° 💧 None 💨 3 mph H 80%30.06 inHg

2:00 PM

Mostly sunny

71° 💧 None 💨 3 mph H 80%30.12 inHg

8:00 PM

Partly cloudy night

85° 💧 None 💨 4 mph H 37%30.09 inHg

Tuesday

2:00 AM

Partly cloudy night

77° 💧 None 💨 1 mph H 55%30.12 inHg

8:00 AM

Partly cloudy

73° 💧 None 💨 3 mph H 74%30.18 inHg

2:00 PM

Mostly cloudy

72° 💧 None 💨 4 mph H 74%30.24 inHg

8:00 PM

Partly cloudy night

81° 💧 None 💨 11 mph H 52%30.21 inHg

Wednesday

2:00 AM

Clear night

76° 💧 None 💨 9 mph H 82%30.18 inHg

8:00 AM

Sunny

74° 💧 None 💨 8 mph H 87%30.18 inHg

2:00 PM

Mostly sunny

75° 💧 None 💨 4 mph H 84%30.18 inHg

8:00 PM

Mostly cloudy night

91° 💧 None 💨 3 mph H 45%30.12 inHg

Thursday

2:00 AM

Mostly cloudy night

79° 💧 None 💨 4 mph H 80%30.18 inHg

8:00 AM

Mostly sunny

70° 💧 None 💨 8 mph H 63%30.24 inHg

2:00 PM

Sunny

64° 💧 None 💨 8 mph H 65%30.30 inHg

8:00 PM

Partly cloudy night

76° 💧 None 💨 6 mph H 42%30.24 inHg

Friday

2:00 AM

Partly cloudy night

70° 💧 None 💨 4 mph H 61%30.18 inHg

8:00 AM

Sunny

64° 💧 None 💨 2 mph H 81%30.12 inHg

2:00 PM

Mostly sunny

65° 💧 None 💨 2 mph H 80%30.06 inHg

8:00 PM

Light rain

76° 💧 None 💨 3 mph H 43%29.94 inHg

Saturday

2:00 AM

Light rain

67° 💧 None 💨 1 mph H 75%29.88 inHg

8:00 AM

Light rain

60° 💧 None 💨 3 mph H 97%29.88 inHg

2:00 PM

Moderate rain

57° 💧 None 💨 11 mph H 95%29.91 inHg

8:00 PM

Moderate rain

54° 💧 None 💨 16 mph H 90%30.00 inHg

Sunday

2:00 AM

Mostly clear night

54° 💧 None 💨 12 mph H 81%30.09 inHg

8:00 AM

Sunny

53° 💧 None 💨 10 mph H 68%30.15 inHg

2:00 PM

Sunny

52° 💧 None 💨 10 mph H 64%30.24 inHg

8:00 PM

Clear night

62° 💧 None 💨 9 mph H 43%30.24 inHg

Monday

2:00 AM

Clear night

58° 💧 None 💨 5 mph H 67%30.27 inHg

8:00 AM

Mostly sunny

52° 💧 None 💨 4 mph H 77%30.33 inHg

2:00 PM

Sunny

52° 💧 None 💨 5 mph H 84%30.39 inHg

In Roslyn Harbor and, more broadly, across the state of New York: Tonight, skies will be mostly sunny with just a few clouds drifting through. Temperatures will remain on the cool side, dropping to between 59 and 63 degrees Fahrenheit. Light northwest winds will prevail, mostly around 4 mph, with occasional gusts reaching up to 5 mph. No rain is expected during the evening hours, providing clear conditions for outdoor activities. Throughout the night, conditions will stay quite calm with minimal wind, making for a comfortable and quiet evening. Temperatures will gradually ease into the lower 60s, maintaining a cool but pleasant atmosphere. Overall, expect a peaceful night with clear skies and light breezes before the arrival of tomorrow.

15-Day Weather Outlook for Roslyn Harbor

TomorrowTomorrow

Partly cloudy 79°/61° 💧 None 💨 5 mph

Wednesday, Sep 9Wed Sep 9

Overcast 83°/68° 💧 None 💨 13 mph

Thursday, Sep 10Thu Sep 10

Mostly sunny 87°/73° 💧 0.010 in 💨 14 mph

Friday, Sep 11Fri Sep 11

Light rain 81°/66° 💧 0.026 in 💨 9 mph

Saturday, Sep 12Sat Sep 12

Partly cloudy 79°/65° 💧 None 💨 7 mph

Sunday, Sep 13Sun Sep 13

Overcast 77°/67° 💧 0.123 in 💨 5 mph

Monday, Sep 14Mon Sep 14

Partly cloudy 83°/71° 💧 None 💨 7 mph

Tuesday, Sep 15Tue Sep 15

Partly cloudy 85°/72° 💧 None 💨 4 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 81°/74° 💧 None 💨 11 mph

Thursday, Sep 17Thu Sep 17

Mostly cloudy 91°/64° 💧 0.097 in 💨 8 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 76°/64° 💧 0.002 in 💨 6 mph

Saturday, Sep 19Sat Sep 19

Moderate rain 76°/57° 💧 1.322 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Moderate rain 54°/52° 💧 0.905 in 💨 16 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 62°/52° 💧 None 💨 9 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Roslyn Harbor

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Roslyn Harbor

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 4:00 AM

PM2.5 Fine particles Good 5,8µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 7,3µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 23,4µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 7,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Roslyn Harbor

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,3High 😊Good

Tomorrow UV 6,6High 😐Moderate

Wednesday UV 6,6High 😐Moderate

Thursday UV 6,0High 🙂Fair

Friday UV 7,0High 😊Good

Saturday UV 7,0High —Unavailable

Sunday UV 7,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,5 9:00 AMUV 1,5 10:00 AMUV 3,0 11:00 AMUV 4,7 12:00 PMUV 5,9 1:00 PMUV 6,3 2:00 PMUV 5,8 3:00 PMUV 4,4 4:00 PMUV 2,8 5:00 PMUV 1,3 6:00 PMUV 0,4

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Roslyn Harbor

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ROSLYN HARBOR, NEW YORK

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

99/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:54 PM–4:52 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 21% Waning Crescent · Moon about 18° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 78° high at the best hour.

✦ Estimated visible meteors 2–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min76%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Roslyn Harbor were last refreshed today at 3:38 AM. The current forecast period extends through 09/09/2026 at 1:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.