The Seabrook Beach plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
Mostly cloudy
Mostly sunny; warmer
Partly cloudy
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74° on Nov. 11, 2020, the hottest reading for this week of the year since 1973. Next is 74° in 2022.
Seabrook Beach’s center stands about 10 ft above sea level. Within three miles the land runs from 0 ft to 100 ft, a difference of 100 ft: gently rolling country. Open water lies within three miles. The highest named summit within 15 miles is Chair Hill, about 370 ft, 7 miles west.
Under the town center the state geologic map shows Newburyport Complex (tonalite, granodiorite), from the Silurian, 422 to 428 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 54×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Phyllite, quartzite, mica-schist. Age: Ordovician to Silurian, 422 to 487 million years old. About 5 mi of the line.
Tonalite, granodiorite. Age: Silurian, 422 to 428 million years old. About 3 mi of the line.
Granofels, biotite-schist. Age: Ordovician to Silurian, 422 to 487 million years old. About 2 mi of the line.
Granite. Age: Silurian, 422 to 428 million years old. About 2 mi of the line.
Phyllite. Age: Ordovician to Silurian, 422 to 487 million years old. About 0.5 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Seabrook Beach reaches the Atlantic Ocean by way of the Hampton: about 1 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Seabrook Beach; river miles along the main stem, rounded.
Seabrook Beach has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 16° in January. A normal year brings about 65 inches of snow; with the rain, that comes to about 51 inches of water.
On November 14 Seabrook Beach normally reaches 49° and falls to 32°. The record high is 71°, in 1989; the record low 10°, in 1986. The most rain on this date, 1.90 in, fell in 2006.
Normals 1991–2020 and records since 1973 at Greenland, 9 miles north. NOAA, through RCC-ACIS.
