Hurricanes and Tornadoes That Hit Seabrook, NH

The nearest NOAA station with 1991–2020 climate normals is Greenland, NH, 10 miles north of Seabrook at 95 feet. July is the warmest, with an average high of 81°F and low of 60°F; January is the coolest, at 33°F and 16°F. October is the wettest at 5.0 inches of precipitation on average and January and February the driest at 3.6 inches; the year adds up to 50.9 inches over 84 days with at least a tenth of an inch. June to November, the hurricane season months, bring 50% of the year's precipitation (25.4 of 50.9 inches). September has brought the most of the 43 tropical systems that passed within 75 miles (18); a normal September there has highs of 72°F and 4.1 inches of precipitation. Highs reach 90°F on about 11 days a year, almost all from June to August. Lows fall below freezing on about 143 nights a year. Snowfall averages 65.0 inches a year, most of it in January. That 50.9 inches is more than at 36 of the 39 New Hampshire stations used on this site (92%). Salisbury, MA, 2 miles south, has its own station (Groveland, MA): 49.1 inches a year, 1.8 less than here, and a July average high of 83°F against 81°F.

Water temperature at the NOAA tide station Seavey Island, ME, 15 miles northeast, averaged 64°F in August and 37°F in February over 2021–2025. No month averaged 80°F. Sea level at the Seavey Island tide gauge, 15 miles from Seabrook, has risen 0.87 ± 0.04 inches per decade from 1926 to 2025, NOAA's linear trend; at that pace it is 8.7 inches in a hundred years. That is faster than at 48 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 105 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Seabrook: 89 thunderstorm wind reports, 8 floods, 6 lightning strikes and 2 flash floods. They killed 0 people and injured 26, and the NWS estimated $3.6 million in property and crop damage. The strongest thunderstorm gust on record here was 70 mph, on July 12, 2010.

Flood insurance policyholders in Seabrook's ZIP code 03874 have filed 91 claims with the National Flood Insurance Program since 1978, and were paid $802,000 for buildings and contents, in the dollars of each year. The most came from Flooding in 1996: 15 claims (16% of all) and $79,000, then The "Halloween" Storm in 1991 with 11. The year with the most claims was 2006, with 18. 32% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 60 New Hampshire cities on this site with 10 or more claims, 51 have fewer than Seabrook.