Seabrook Beach, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seabrook Beach, a community in Rockingham County, New Hampshire.
This Afternoon
66°F
Mostly Cloudy
Mostly cloudy. High near 66, with temperatures falling to around 60 in the afternoon. Southeast wind around 5 mph.
7-day forecast for Seabrook Beach
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Cloudy | 5 mph SE | 11% |
| Tonight | 51°F | Partly Cloudy | 0 to 5 mph S | 11% |
| Wednesday | 73°F | Sunny | 5 mph SW | 6% |
| Wednesday Night | 54°F | Partly Cloudy | 5 mph SW | 1% |
| Thursday | 72°F | Partly Sunny then Slight Chance Light Rain | 5 to 10 mph SW | 19% |
| Thursday Night | 58°F | Chance Light Rain | 5 to 10 mph SW | 35% |
| Friday | 68°F | Light Rain Likely | 5 mph S | 68% |
| Friday Night | 53°F | Light Rain | 5 mph E | 85% |
| Saturday | 62°F | Light Rain | 5 to 10 mph N | 77% |
| Saturday Night | 46°F | Chance Light Rain | 5 mph N | 53% |
| Sunday | 59°F | Chance Light Rain | 5 to 10 mph NW | 29% |
| Sunday Night | 43°F | Partly Cloudy then Slight Chance Light Rain | 5 mph W | 15% |
| Monday | 58°F | Chance Light Rain | 5 mph W | 32% |
| Monday Night | 41°F | Chance Light Rain | 5 to 10 mph NW | 36% |
Forecast source: National Weather Service (api.weather.gov) for Seabrook Beach (42.881, -70.825). Updated through the day.
Growing snapshot for Seabrook Beach
Last spring frost
May 4
First fall frost
Oct 8
Growing season
157 days
Hardiness zone
6b
More local growing data for Seabrook Beach: nearby ZIP 03874 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Greenland, Nh (9.7 mi from Seabrook Beach). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.