Old Tappan, NJ Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 66°F | Mostly Cloudy | 3 mph N | 2% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph SE | 30% |
| Wednesday Night | 71°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph S | 35% |
| Thursday | 89°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 47% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SW | 46% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph SW | 44% |
| Friday Night | 72°F | Chance Showers And Thunderstorms | 5 mph W | 42% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph W | 35% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 35% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 15% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 2 to 6 mph W | 15% |
| Monday | 90°F | Sunny | 2 to 9 mph W | 14% |
| Monday Night | 71°F | Partly Cloudy | 3 to 8 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Old Tappan, NJ
Last spring frost
Apr 20
First fall frost
Oct 26
Growing season
189 days
Hardiness zone
7a
Explore more for Old Tappan, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Dobbs Ferry-Ardsley, Ny (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.