Non-profit organization dedicated to promoting conservation of the marine environment. Information on research projects, education programs, whale watches, volunteer and internship opportunities, and events calendar.

Promotes the wise use and management of Great Bay Estuary. Includes information about the Sandy Point Discovery Center. Programs, natural history, event schedule, research projects, educational resources, contacts, and stewardship opportunities.

Environmental information and reports for the watershed area. Maps, statistics, message boards, and related links.

Offers six months of tide predictions for several points along the NH coastline. Also lists links to charts for other New England ports, FAQs, and marine forecasts.