Seabrook Beach, NH Weather & Growing Conditions
This Afternoon
64°F
Mostly Sunny
Mostly sunny, with a high near 64. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 48°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 60°F | Rain | 0 to 5 mph S | 88% |
| Sunday Night | 50°F | Rain | 5 to 10 mph NE | 88% |
| Monday | 65°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Monday Night | 48°F | Partly Cloudy | 0 to 10 mph NE | 0% |
| Tuesday | 62°F | Partly Sunny | 5 to 10 mph NE | 1% |
| Tuesday Night | 48°F | Partly Cloudy | 0 to 10 mph NE | 0% |
| Wednesday | 62°F | Mostly Sunny | 10 to 15 mph NE | 1% |
| Wednesday Night | 47°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 10 mph NE | 15% |
| Thursday | 62°F | Slight Chance Rain Showers | 10 to 15 mph NE | 20% |
| Thursday Night | 48°F | Chance Rain Showers | 5 to 15 mph NE | 33% |
| Friday | 62°F | Chance Rain Showers | 15 mph NE | 41% |
| Friday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 42% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Seabrook Beach, NH
Last spring frost
May 4
First fall frost
Oct 8
Growing season
157 days
Hardiness zone
6b
Explore more for Seabrook Beach, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Greenland, Nh (9.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.