All Countries
West Islip, NY
Full City Profile · New York · Nassau County County
3.9
/5.0
B+
Good
26,559
Population
4,361/sq mi density
$171,045
Median Income
$66,182 per capita
$592,700
Home Value
$718,621 Zillow
$2,613
Median Rent
31.4% income on rent
54°F
Avg Temperature
275 sunny days/yr
119
Violent Crime/100K
785 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$171,045 median income, 2.6% unemployment
A+
Affordability
4.7 / 5.0
$592,700 home value, $2,613/mo rent
F
Safety
1.0 / 5.0
119 violent crimes/100K
A+
Education
5.0 / 5.0
50.1% bachelor's degree or higher
West Islip experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 32°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.3 inches. Air quality is rated Good with a median AQI of 36.
Temperature
32°F Jan (0°C)
75°F Jul (24°C)
| Annual Average | 53.5°F |
| 1% below US avg | |
| January Average | 32°F (0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 16 ft (5 m) |
| Area | 6.8 sq mi (17.5 km²) |
| Population Density | 4,361/sq mi |
| Coordinates | 40.7029°N, 73.2955°W |
| Timezone | America/New_York |
| County | Nassau County County |
| Nearest Airport | John F Kennedy International (JFK) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.1 / 100 |
| Social Vulnerability | 25.9 / 100 |
| Community Resilience | 97.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Very High |
| Ice Storm | Very High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 0.3 m (1 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1964 | LONG ISLAND, NY | Meteorological | 0.3 m | — | 20 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 134 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 3.5 in | Coldest |
| February | 32°F (0°C) | 3.0 in | |
| March | 40°F (5°C) | 4.1 in | Wettest |
| April | 50°F (10°C) | 3.8 in | |
| May | 60°F (15°C) | 3.5 in | |
| June | 69°F (20°C) | 2.9 in | Driest |
| July | 75°F (24°C) | 3.1 in | Warmest |
| August | 73°F (23°C) | 3.9 in | |
| September | 66°F (19°C) | 3.2 in | |
| October | 55°F (13°C) | 3.2 in | |
| November | 46°F (8°C) | 3.8 in | |
| December | 36°F (2°C) | 3.7 in |
West Islip has a seasonal temperature swing of 43°F / from 32°F in January to 75°F in July. Total annual precipitation is 41.7 inches, with March being the wettest month (4.1") and June the driest (2.9").