South Amboy, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Amboy, a city in Middlesex County, New Jersey.
Today
80°F
Mostly Sunny
Mostly sunny, with a high near 80. East wind 0 to 5 mph.
7-day forecast for South Amboy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Tonight | 69°F | Mostly Cloudy | 0 to 5 mph SE | 1% |
| Wednesday | 80°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 48% |
| Wednesday Night | 73°F | Slight Chance Showers And Thunderstorms | 5 mph S | 30% |
| Thursday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 38% |
| Thursday Night | 75°F | Chance Showers And Thunderstorms | 5 mph SW | 38% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Friday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 5 mph W | 35% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 5 mph W | 35% |
| Sunday | 89°F | Mostly Sunny | 5 mph W | 13% |
| Sunday Night | 73°F | Mostly Clear | 5 mph SW | 13% |
| Monday | 91°F | Mostly Sunny | 5 to 10 mph W | 8% |
| Monday Night | 73°F | Partly Cloudy | 5 to 10 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for South Amboy (40.486, -74.279). Updated through the day.
Growing snapshot for South Amboy
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7b
More local growing data for South Amboy: nearby ZIP 08879 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
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Middlesex
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New Brunswick
Old Bridge
Climate data from the nearest NOAA station, New Brunswick 3 Se, Nj (7.6 mi from South Amboy). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.