Seaford, NY
Full City Profile · New York · Nassau County County
4.4
/5.0
A
Great
15,884
Population
6,086/sq mi density
$156,488
Median Income
$61,645 per capita
$631,000
Home Value
$812,654 Zillow
$2,612
Median Rent
33.6% income on rent
55°F
Avg Temperature
A
Overall
4.4 / 5.0
Strong
A
Economy
4.4 / 5.0
$156,488 median income, 5.9% unemployment
A
Affordability
4.4 / 5.0
$631,000 home value, $2,612/mo rent
A
Education
4.5 / 5.0
43.6% bachelor's degree or higher
Seaford experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 35°F in January while summers reach 77°F in July. Annual precipitation totals 42.8 inches. The area receives 25.5 inches of snow annually. Air quality is rated Good with a median AQI of 31.
Temperature
35°F Jan (2°C)
77°F Jul (25°C)
| Annual Average | 55.4°F |
| 3% above US avg | |
| January Average | 35°F (2°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 12 ft (4 m) |
| Area | 2.7 sq mi (6.9 km²) |
| Population Density | 6,086/sq mi |
| Coordinates | 40.6662°N, 73.4926°W |
| Timezone | America/New_York |
| County | Nassau County County |
| Nearest Airport | John F Kennedy International (JFK) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 31.0 |
| Rating | Good |
| Good Days % | 84.2% |
| Unhealthy Days | 0 |
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 | - | 36 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 117 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (2°C) | 3.3 in | Coldest |
| February | 36°F (2°C) | 2.8 in | Driest |
| March | 42°F (6°C) | 4.1 in | |
| April | 51°F (11°C) | 3.8 in | |
| May | 61°F (16°C) | 3.3 in | |
| June | 71°F (22°C) | 3.8 in | |
| July | 77°F (25°C) | 3.2 in | Warmest |
| August | 76°F (24°C) | 3.7 in | |
| September | 69°F (21°C) | 3.6 in | |
| October | 58°F (15°C) | 3.7 in | |
| November | 48°F (9°C) | 3.1 in | |
| December | 40°F (4°C) | 4.4 in | Wettest |
Seaford has a seasonal temperature swing of 42°F / from 35°F in January to 77°F in July. Total annual precipitation is 42.8 inches, with December being the wettest month (4.4") and February the driest (2.8").