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.
This Afternoon
70°F
Mostly Sunny
Mostly sunny, with a high near 70. East wind around 10 mph.
7-day forecast for South Amboy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Sunny | 10 mph E | 1% |
| Tonight | 64°F | Mostly Cloudy | 5 to 10 mph SE | 4% |
| Sunday | 73°F | Rain Showers | 5 to 10 mph SE | 81% |
| Sunday Night | 62°F | Showers And Thunderstorms | 5 to 15 mph W | 76% |
| Monday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 42% |
| Monday Night | 58°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Tuesday | 62°F | Chance Rain Showers | 15 mph NE | 32% |
| Tuesday Night | 54°F | Chance Rain Showers | 15 mph NE | 29% |
| Wednesday | 64°F | Chance Rain Showers | 15 mph NE | 26% |
| Wednesday Night | 54°F | Chance Rain Showers | 15 mph NE | 33% |
| Thursday | 64°F | Chance Rain Showers | 15 mph NE | 34% |
| Thursday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Friday | 65°F | Chance Rain Showers | 10 to 15 mph N | 34% |
| Friday Night | 53°F | Chance Rain Showers | 10 mph N | 31% |
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
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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 Sep 19, 2026.